Equipment Inspection and Testing
Expert-defined terms from the Graduate Certificate in Mining Equipment Maintenance course at London School of Planning and Management. Free to read, free to share, paired with a professional course.
Acoustic Emission Testing #
A non‑destructive technique that monitors transient elastic waves produced by crack formation or material deformation. Example: Detecting early fatigue cracks in drill‑head bearings. Practical application includes continuous monitoring of high‑stress components. Challenges involve signal‑to‑noise discrimination and equipment calibration. Related terms: non‑destructive testing, fatigue monitoring
Alignment #
The process of adjusting two or more machine elements so that their axes are collinear within specified tolerances. Example: Aligning a conveyor belt drive sprocket to its motor shaft. Practical application ensures efficient power transmission and reduces wear. Challenges include dealing with thermal expansion and limited access points. Related terms: shaft coupling, geometric tolerance
Amplitude Modulation (AM) Vibration Analysis #
A method that varies the amplitude of a carrier signal to encode vibration data for remote transmission. Example: Sending real‑time motor vibration signatures to a central monitoring station. Practical application enables early fault detection in remote underground equipment. Challenges include signal attenuation in metallic environments and interference from electromagnetic sources. Related terms: vibration monitoring, telemetry
Annual Calibration #
Scheduled verification and adjustment of measurement instruments to maintain traceability to national standards. Example: Calibrating a torque wrench used on haul‑truck winches. Practical application guarantees accurate torque application and compliance with safety regulations. Challenges involve downtime planning and maintaining calibration records. Related terms: traceability, metrology
Artificial Intelligence (AI) Diagnostics #
Use of machine‑learning algorithms to interpret sensor data and predict equipment failures. Example: AI model analyzing temperature and vibration trends of a crusher to forecast bearing replacement. Practical application reduces unplanned downtime and optimizes maintenance schedules. Challenges include data quality, model bias, and integration with legacy systems. Related terms: predictive maintenance, data analytics
Backlash #
The clearance or lost motion between mating gear teeth or threaded components when direction is reversed. Example: Measuring backlash in a hydraulic excavator’s gear train. Practical application ensures smooth operation and prevents shock loading. Challenges arise from wear, improper assembly, and thermal expansion. Related terms: gear mesh, tolerance stack‑up
Baseline Survey #
Initial comprehensive inspection that records the condition of equipment prior to any maintenance activity. Example: Documenting wear patterns on a conveyor belt before a refurbishment project. Practical application provides reference data for trend analysis. Challenges include ensuring completeness and consistency across inspectors. Related terms: condition monitoring, reference data
Ballistic Impact Testing #
Evaluation of protective equipment by subjecting it to high‑velocity projectile impacts. Example: Testing the armor of a mining vehicle cab against rock fragments. Practical application validates compliance with safety standards. Challenges involve replicating realistic impact angles and controlling test variables. Related terms: impact resistance, safety certification
Bearing Temperature Monitoring #
Continuous measurement of the temperature of rotating element bearings to detect overheating. Example: Infrared sensors on a crusher’s main bearing. Practical application provides early warning of lubrication failure. Challenges include sensor placement, emissivity correction, and ambient temperature influence. Related terms: thermal imaging, lubrication analysis
Bleed Valve Inspection #
Examination of pressure‑relief valves that discharge fluid to prevent over‑pressurization. Example: Checking the bleed valve on a hydraulic cylinder of a loader. Practical application maintains system safety and prevents hydraulic oil loss. Challenges include corrosion, blockage, and incorrect spring preload. Related terms: hydraulic safety, pressure regulation
Blade Edge Wear #
Assessment of the progressive loss of material at the cutting edge of drilling or excavation blades. Example: Measuring wear on a front‑end loader’s bucket teeth. Practical application informs replacement intervals and optimizes cutting efficiency. Challenges involve uneven wear patterns and difficulty accessing the edge for measurement. Related terms: tool wear, cutting geometry
Blind Spot Detection #
Use of sensors to identify objects that are not visible to the operator due to equipment geometry. Example: Ultrasonic sensors on a haul‑truck cab to detect obstacles behind the vehicle. Practical application enhances operator safety in confined mine tunnels. Challenges include sensor false‑positives and limited range in dusty environments. Related terms: collision avoidance, operator assistance
Booster Pump Test #
Performance verification of a pump that increases pressure in a hydraulic circuit. Example: Flow‑rate and pressure testing of a booster pump feeding a drilling rig. Practical application ensures sufficient hydraulic power for demanding operations. Challenges involve pressure spikes, cavitation, and pump wear. Related terms: hydraulic circuit, pump efficiency
Brake System Audit #
Systematic review of all components that provide stopping power to mobile equipment. Example: Inspecting service brakes, parking brakes, and ABS modules on a dump truck. Practical application verifies compliance with regulatory standards and prevents brake failure. Challenges include wear variability, heat‑related degradation, and complex hydraulic lines. Related terms: brake wear, safety inspection
Calibration Certificate #
Document that records the results of an instrument’s calibration, including uncertainty and traceability. Example: A certificate accompanying a calibrated load cell used on a crushing circuit. Practical application provides evidence of measurement accuracy for audits. Challenges involve certificate management and ensuring the instrument remains within calibration period. Related terms: quality assurance, measurement uncertainty
Camshaft Lobe Inspection #
Visual and dimensional examination of camshaft lobes for wear, scoring, or deformation. Example: Checking the camshaft of a diesel engine powering a conveyor motor. Practical application maintains valve timing accuracy and engine performance. Challenges include limited access and the need for specialized gauges. Related terms: engine timing, wear analysis
Capacitive Proximity Sensor #
Device that detects the presence of metallic objects by measuring changes in capacitance. Example: Sensing the position of a hydraulic piston rod in a crusher. Practical application provides precise position feedback for control systems. Challenges include sensitivity to environmental contaminants and electromagnetic interference. Related terms: position sensing, non‑contact detection
Carbon Deposition Check #
Inspection for carbon buildup on surfaces exposed to combustion gases. Example: Examining the exhaust manifold of a diesel‑powered excavator for soot accumulation. Practical application prevents overheating and maintains exhaust flow. Challenges include difficult access and the need for specialized cleaning tools. Related terms: combustion by‑product, engine maintenance
Chain Tension Measurement #
Determination of the tightness of power‑transmission chains to avoid slippage or excessive wear. Example: Measuring the tension of a conveyor drive chain using a calibrated tension gauge. Practical application ensures reliable power delivery and prolongs chain life. Challenges include thermal expansion, chain elongation, and variable load conditions. Related terms: tension gauge, power transmission
Chassis Structural Integrity #
Evaluation of the frame that supports all major components of a mining vehicle. Example: Ultrasonic inspection of welds on a mining truck chassis. Practical application detects cracks that could lead to catastrophic failure. Challenges involve accessing hidden welds and interpreting ultrasonic echoes. Related terms: weld inspection, fatigue assessment
Clearance Gauge #
Tool used to measure the gap between two mating parts. Example: Using a feeler gauge to verify the clearance between a bearing housing and shaft. Practical application ensures compliance with design tolerances. Challenges include gauge wear and operator skill level. Related terms: dimensional inspection, tolerance verification
Climatic Conditioning #
Pre‑testing of equipment in controlled temperature and humidity to simulate field conditions. Example: Exposing a hydraulic pump to low‑temperature chambers before deployment in a high‑altitude mine. Practical application validates performance under extreme environments. Challenges involve replicating rapid temperature changes and moisture ingress. Related terms: environmental testing, reliability validation
Coating Adhesion Test #
Assessment of the bond strength between a protective coating and substrate. Example: Pull‑off test of anti‑corrosive paint on a bucket’s steel surface. Practical application ensures coating durability against abrasive mining media. Challenges include surface preparation consistency and test equipment calibration. Related terms: surface preparation, corrosion protection
Combustion Analyzer #
Instrument that measures gases produced during fuel combustion to evaluate efficiency. Example: Using a handheld analyzer on a diesel engine to detect excess carbon monoxide. Practical application improves fuel economy and reduces emissions. Challenges involve sensor fouling and accurate sampling in dusty environments. Related terms: emissions testing, fuel diagnostics
Compression Test #
Measurement of the ability of a component to resist a compressive load without deformation. Example: Testing the compressive strength of a hydraulic cylinder head. Practical application verifies structural adequacy under load. Challenges include ensuring uniform load application and avoiding buckling. Related terms: material testing, load rating
Condition Monitoring #
Ongoing observation of equipment parameters to detect deviations from normal operation. Example: Trend analysis of vibration spectra from a crusher motor. Practical application enables predictive maintenance and reduces unexpected failures. Challenges include data overload, sensor reliability, and establishing meaningful thresholds. Related terms: predictive analytics, health monitoring
Conveyor Belt Tracking #
Alignment procedure that ensures the belt runs centrally on the rollers. Example: Adjusting idler positions to correct belt drift on a bulk‑material conveyor. Practical application reduces belt wear and prevents spillage. Challenges involve uneven loading, roller wear, and tension variations. Related terms: belt alignment, idler adjustment
Corrosion Rate Measurement #
Determination of material loss over time due to chemical reactions. Example: Using weight‑loss coupons to assess corrosion of steel brackets in a wet mine environment. Practical application informs protective coating schedules. Challenges include exposing coupons to representative conditions and interpreting data accurately. Related terms: material degradation, protective coating
Crack Propagation Inspection #
Detection of the growth direction and rate of existing cracks. Example: Employing acoustic emission sensors on a crusher frame to monitor crack extension. Practical application predicts remaining useful life and prevents sudden failure. Challenges involve distinguishing background noise and locating crack tips. Related terms: fracture mechanics, non‑destructive evaluation
Crested Wheel Alignment #
Technique for aligning wheels that have a raised central ridge, common on some heavy‑duty trucks. Example: Aligning a mining haul‑truck’s crested wheels to avoid uneven tire wear. Practical application improves steering response and tire longevity. Challenges include measuring the crest height accurately and compensating for tire pressure variations. Related terms: wheel geometry, tire wear
Cyclic Load Testing #
Application of repeated load cycles to simulate operational stresses. Example: Testing a hydraulic cylinder by applying 10,000 pressure cycles to mimic excavation duty. Practical application validates component durability and identifies fatigue limits. Challenges involve controlling load amplitude and frequency, and monitoring for early failure signs. Related terms: fatigue testing, endurance limit
Digital Twin Simulation #
Virtual replica of physical equipment that mirrors real‑time operating conditions. Example: A digital twin of a crushing circuit that updates with sensor data to predict maintenance needs. Practical application enables scenario analysis without interrupting production. Challenges include model fidelity, data latency, and computational resources. Related terms: simulation modeling, real‑time analytics
Discharge Pressure Verification #
Check that the pressure at the outlet of a pump meets design specifications. Example: Measuring the discharge pressure of a water pump supplying a dust suppression system. Practical application confirms pump performance and system adequacy. Challenges involve pressure transducer accuracy and flow‑induced pressure fluctuations. Related terms: pump performance, pressure sensor
Dust Ingress Test #
Evaluation of equipment sealing effectiveness against particulate contamination. Example: Subjecting a motor housing to a controlled dust environment and measuring ingress. Practical application protects internal components from abrasive wear. Challenges include replicating field dust characteristics and ensuring test repeatability. Related terms: seal integrity, environmental protection
Dynamic Balancing #
Process of adjusting rotating masses to eliminate unbalance forces during operation. Example: Balancing a crusher rotor to reduce vibration amplitudes. Practical application extends bearing life and reduces structural fatigue. Challenges include precise mass addition, measurement accuracy, and repeatability after installation. Related terms: rotor balancing, vibration reduction
Electrical Continuity Test #
Verification that an electrical path is uninterrupted and has acceptable resistance. Example: Testing continuity of a grounding strap on a haul‑truck frame. Practical application ensures safety and proper operation of control circuits. Challenges include corrosion, connector looseness, and stray resistance. Related terms: insulation testing, resistance measurement
Emergency Stop (E‑Stop) Verification #
Inspection of the safety circuit that halts equipment operation instantly. Example: Pulling an E‑stop button on a conveyor and confirming motor shutdown. Practical application guarantees compliance with safety standards. Challenges involve mechanical linkage wear and electronic logic faults. Related terms: machine safeguarding, safety interlock
Envelope Stress Analysis #
Assessment of the maximum stress distribution across a component’s outer surface. Example: Finite‑element analysis of a crusher housing to identify high‑stress zones. Practical application guides design reinforcement and inspection focus. Challenges include accurate material property data and load case definition. Related terms: finite element modeling, stress concentration
Equipment Tagging #
Assignment of identification labels to each asset for tracking and maintenance history. Example: Affixing QR‑coded tags to hydraulic pumps. Practical application simplifies inventory control and work‑order generation. Challenges involve tag durability in harsh environments and ensuring consistent data entry. Related terms: asset management, barcode system
Exhaust Gas Temperature (EGT) Monitoring #
Continuous measurement of the temperature of gases exiting an engine. Example: Using an EGT probe on a diesel engine of a loader to detect combustion anomalies. Practical application helps prevent overheating and optimizes fuel injection timing. Challenges include probe fouling and sensor drift. Related terms: engine diagnostics, temperature sensor
Fatigue Crack Detection #
Identification of small cracks that develop under cyclic loading. Example: Magnetic particle inspection of a rotating shaft to locate fatigue cracks. Practical application prevents catastrophic failure by enabling early repair. Challenges include detecting sub‑surface cracks and differentiating from surface irregularities. Related terms: non‑destructive testing, crack growth
Field Calibration #
On‑site adjustment of measurement instruments to maintain accuracy without returning to a laboratory. Example: Calibrating a pressure transducer on a hydraulic system after a major repair. Practical application reduces downtime and ensures reliable data. Challenges involve portable calibration standards and environmental influences. Related terms: instrument verification, on‑site testing
Film Thickness Gauge #
Tool used to measure the thickness of protective coatings or lubricants. Example: Measuring the oil film on a gear tooth using a micrometer‑type gauge. Practical application confirms adequate lubrication and coating coverage. Challenges include gauge wear and surface roughness affecting readings. Related terms: lubrication monitoring, coating inspection
Flange Bolt Torque Check #
Verification that bolts joining flanged components are tightened to specified torque values. Example: Torque testing of flange bolts on a high‑pressure hydraulic manifold. Practical application prevents leaks and joint failure. Challenges involve torque wrench accuracy and bolt stretch monitoring. Related terms: bolt tension, joint integrity
Friction Coefficient Measurement #
Determination of the resistance to motion between two contacting surfaces. Example: Testing the friction coefficient of a conveyor belt on steel rollers. Practical application informs material selection and lubrication needs. Challenges include controlling surface conditions and temperature during testing. Related terms: tribology, wear analysis
Fuel Quality Analysis #
Laboratory or on‑site testing of fuel properties to ensure compliance with specifications. Example: Checking sulfur content in diesel fuel used for underground equipment. Practical application prevents engine fouling and emissions violations. Challenges involve sample contamination and rapid analysis turnaround. Related terms: fuel testing, combustion efficiency
Gear Backlash Measurement #
Determination of the clearance between meshing gear teeth. Example: Using a dial indicator to measure backlash on a crusher drive gear. Practical application ensures smooth power transmission and reduces impact loads. Challenges include temperature‑induced expansion and measurement repeatability. Related terms: gear mesh, tolerance assessment
Geotechnical Sensor Calibration #
Adjustment of sensors that monitor rock mass behavior to ensure accurate readings. Example: Calibrating a stress gauge embedded in a rock face near a mining pit wall. Practical application provides reliable data for slope stability analysis. Challenges include sensor drift and harsh underground conditions. Related terms: stress monitoring, sensor validation
Global Positioning System (GPS) Survey #
Use of satellite navigation to determine precise equipment locations. Example: Logging the position of a drilling rig to track movement over a mine lease. Practical application aids asset tracking and route planning. Challenges involve signal blockage in deep pits and multipath errors. Related terms: geolocation, asset tracking
Heat‑Soak Test #
Procedure that subjects equipment to elevated temperatures for a specified period to assess thermal stability. Example: Exposing a hydraulic valve to 80 °C for 48 hours to detect seal degradation. Practical application validates suitability for high‑temperature operations. Challenges include controlling temperature uniformity and preventing thermal shock. Related terms: thermal endurance, material stability
Hydraulic Fluid Analysis #
Laboratory examination of oil to detect contaminants, wear particles, and degradation. Example: Spectrometric analysis of hydraulic oil from a crusher circuit. Practical application identifies early bearing wear and oxidation. Challenges involve sampling technique, contamination avoidance, and interpreting trends. Related terms: oil testing, condition monitoring
Impact Energy Tester #
Device that measures the energy absorbed by a material during fracture. Example: Charpy impact test of steel used in a crusher frame. Practical application determines material toughness and suitability for impact‑heavy applications. Challenges include specimen preparation and temperature control during testing. Related terms: material toughness, fracture testing
Infrared Thermography #
Non‑contact technique that captures surface temperature distribution using infrared radiation. Example: Scanning a conveyor motor housing for hot spots indicative of bearing failure. Practical application enables early detection of abnormal heating. Challenges include emissivity variation, reflective surfaces, and ambient temperature influence. Related terms: thermal imaging, fault detection
Inspection Interval Planning #
Scheduling of routine checks based on equipment criticality and operating conditions. Example: Setting a six‑month interval for gearbox oil analysis on a primary crusher. Practical application balances risk reduction with maintenance cost. Challenges involve predicting component life and adapting to changing production rates. Related terms: maintenance scheduling, reliability engineering
Interface Connector Integrity #
Assessment of the mechanical and electrical condition of connectors between subsystems. Example: Visual and resistance testing of data cables linking a sensor array to a control cabinet. Practical application prevents signal loss and equipment shutdown. Challenges include corrosion, vibration loosening, and connector wear. Related terms: connector testing, signal integrity
Ionizing Radiation Survey #
Measurement of radiation levels where equipment may be exposed to natural or artificial sources. Example: Checking radiation monitors on equipment operating near a uranium mine. Practical application ensures worker safety and equipment compliance. Challenges involve detector calibration and background fluctuations. Related terms: radiation safety, dosimetry
Jackshaft Alignment #
Procedure to align the secondary shaft that transmits power from the main drive to auxiliary equipment. Example: Aligning the jackshaft of a conveyor belt drive to its motor. Practical application reduces belt wear and improves power efficiency. Challenges include limited access and thermal expansion effects. Related terms: shaft coupling, power transmission
Jaw Crusher Jaw Plate Wear #
Evaluation of the progressive loss of material from the crushing surfaces. Example: Measuring the wear depth on a jaw crusher’s fixed and movable plates. Practical application guides timely plate replacement and maintains product size consistency. Challenges include irregular wear patterns and difficulty accessing the interior for measurement. Related terms: crusher wear, material reduction
Laser Alignment Tool #
Instrument that uses a laser beam to establish straightness and angular relationships between components. Example: Using a laser collimator to align a conveyor drive shaft with its motor. Practical application provides high‑accuracy alignment quickly. Challenges involve dust interference, beam drift, and mounting stability. Related terms: precision alignment, laser instrumentation
Lubricant Viscosity Test #
Determination of a fluid’s resistance to flow at a given temperature. Example: Measuring the viscosity of hydraulic oil at 40 °C using a viscometer. Practical application ensures proper film formation and system efficiency. Challenges include temperature control and contamination affecting results. Related terms: oil grading, fluid properties
Machine Guarding Inspection #
Review of protective devices that prevent contact with moving parts. Example: Checking the condition of a conveyor belt guard rail for cracks or deformation. Practical application reduces injury risk and meets regulatory requirements. Challenges involve wear from impact, corrosion, and proper fit. Related terms: safety barrier, hazard mitigation
Magnetic Particle Inspection (MPI) #
Non‑destructive method that uses magnetic fields and ferrous particles to reveal surface and near‑surface defects. Example: Applying MPI to a steel gear shaft to locate cracks. Practical application provides rapid defect detection without disassembly. Challenges include magnetizing large components and interpreting particle patterns. Related terms: non‑destructive testing, flaw detection
Material Hardness Testing #
Measurement of a material’s resistance to localized plastic deformation. Example: Using a Rockwell hardness tester on a crusher wear plate. Practical application confirms material suitability for abrasive environments. Challenges involve surface preparation and selecting appropriate scale for the material. Related terms: hardness scale, wear resistance
Mechanical Seal Leak Test #
Evaluation of a seal’s ability to prevent fluid escape under pressure. Example: Pressurizing a pump housing and monitoring for leakage around the mechanical seal. Practical application maintains system pressure and prevents contamination. Challenges include seal wear, temperature extremes, and proper installation torque. Related terms: seal integrity, leak detection
Metal Fatigue Life Prediction #
Estimation of the number of cycles a component can endure before failure. Example: Using S‑N curves to predict the lifespan of a crusher rotor. Practical application guides replacement schedules and design improvements. Challenges involve variable loading, surface finish effects, and material inconsistencies. Related terms: fatigue analysis, durability forecasting
Motor Current Signature Analysis (MCSA) #
Technique that interprets motor current waveforms to identify mechanical faults. Example: Detecting bearing defects on a conveyor motor by analyzing current harmonics. Practical application enables early fault detection without additional sensors. Challenges include distinguishing electrical noise from mechanical signatures and requiring baseline data. Related terms: electrical monitoring, fault diagnostics
Noise Level Survey #
Measurement of sound pressure emitted by equipment to assess compliance with occupational health standards. Example: Using a sound level meter to record the noise of a rock‑breaker. Practical application informs hearing‑protection requirements and equipment redesign. Challenges involve ambient noise masking, distance correction, and frequency weighting selection. Related terms: acoustic monitoring, hearing protection
Non‑Destructive Evaluation (NDE) #
Suite of techniques used to assess material condition without causing damage. Example: Ultrasonic testing of a hydraulic cylinder rod for internal flaws. Practical application preserves equipment integrity while revealing hidden defects. Challenges include skill‑level dependence, equipment calibration, and interpretation of results. Related terms: inspection methods, flaw detection
Oil Filter Integrity Test #
Examination of a filter’s ability to retain contaminants while allowing flow. Example: Pressure drop testing of a hydraulic oil filter after service. Practical application verifies filtration performance and prevents system contamination. Challenges include filter media degradation and clogging under high‑particulate loads. Related terms: filtration efficiency, flow restriction
Operational Readiness Review #
Comprehensive assessment to confirm that equipment is prepared for safe and efficient use. Example: Checklist verification of all safety devices, lubrication, and calibration before returning a crusher to service. Practical application reduces start‑up failures and ensures compliance. Challenges include thoroughness, documentation accuracy, and personnel training. Related terms: pre‑start check, commissioning
Over‑Speed Protection Test #
Verification that devices designed to limit rotational speed function correctly. Example: Triggering an over‑speed relay on a conveyor motor and confirming shutdown. Practical application prevents mechanical damage and enhances operator safety. Challenges involve sensor calibration, relay timing, and false‑trip avoidance. Related terms: speed governor, safety interlock
Particle Size Distribution (PSD) Analysis #
Determination of the proportion of different sized particles in a material. Example: Laser diffraction analysis of crushed ore to assess crusher performance. Practical application guides process optimization and equipment selection. Challenges include sample preparation, equipment calibration, and data interpretation. Related terms: granulometry, material characterization
Penetrant Inspection #
Liquid‑based NDE method that reveals surface-breaking defects by capillary action. Example: Applying fluorescent penetrant to a weld on a hydraulic valve body. Practical application provides simple, low‑cost defect detection. Challenges include thorough cleaning, proper dwell time, and UV lighting for fluorescence. Related terms: surface inspection, flaw detection
Periodic Visual Inspection #
Routine walk‑around examination of equipment for obvious signs of wear or damage. Example: Checking for oil leaks, cracked housings, and loose bolts on a loader. Practical application catches obvious issues before they develop into failures. Challenges involve human subjectivity, inconsistent frequency, and missed hidden defects. Related terms: walk‑around, visual check
Pipe Wall Thickness Measurement #
Determination of the remaining material thickness of a pressure vessel or conduit. Example: Using ultrasonic gauging to assess a hydraulic hose’s steel reinforcement. Practical application detects corrosion or erosion that could lead to rupture. Challenges include surface roughness, coating interference, and probe positioning. Related terms: corrosion monitoring, ultrasonic testing
Plunger Valve Seat Wear #
Evaluation of the degradation of the sealing surface in a valve that controls fluid flow. Example: Measuring wear on a hydraulic plunger valve seat after prolonged service. Practical application ensures proper flow control and prevents leakage. Challenges include limited access, abrasive wear, and material compatibility. Related terms: valve maintenance, sealing surface
Power Quality Analysis #
Assessment of electrical supply characteristics such as voltage stability, harmonics, and transients. Example: Using a power analyzer on a mining site’s main feeder to detect voltage sags affecting motor performance. Practical application improves equipment reliability and reduces premature failures. Challenges involve capturing intermittent events and interpreting complex waveforms. Related terms: harmonic distortion, electrical reliability
Pressure Relief Valve (PRV) Test #
Verification that a PRV opens at the designated set‑point to protect equipment. Example: Applying pressure to a hydraulic circuit until the PRV lifts and measuring the opening pressure. Practical application safeguards components from over‑pressurization. Challenges include spring fatigue, valve seat wear, and test equipment safety. Related terms: safety valve, pressure protection
Radiographic Inspection #
Use of X‑ray or gamma radiation to create images of internal structures. Example: Radiographing a welded joint on a high‑pressure pump housing. Practical application detects internal defects such as porosity or cracks. Challenges involve radiation safety, image interpretation, and access constraints. Related terms: non‑destructive testing, internal flaw detection
Remote Monitoring System (RMS) #
Integrated hardware and software that collects and transmits equipment data from distant locations. Example: A cloud‑based dashboard displaying vibration, temperature, and pressure from underground loaders. Practical application enables centralized oversight and rapid response to anomalies. Challenges include network reliability, data security, and sensor durability. Related terms: IoT, telemetry
Resonance Frequency Identification #
Determination of the natural frequencies at which a component tends to vibrate excessively. Example: Using a modal hammer test to find the resonance of a crusher frame. Practical application guides design modifications to avoid operating at resonant speeds. Challenges involve complex modal patterns and environmental damping effects. Related terms: modal analysis, vibration control
Roller Bearing Temperature Profiling #
Mapping temperature distribution across a bearing to detect localized heating. Example: Thermocouple array placed around a conveyor roller bearing. Practical application identifies bearing sections under abnormal load. Challenges include sensor placement interference, thermal lag, and ambient temperature fluctuations. Related terms: thermal monitoring, bearing health
Rotating Equipment Baseline #
Initial set of performance data captured from a newly installed or overhauled rotating machine. Example: Recording vibration spectra of a newly aligned crusher motor before production start. Practical application provides a reference for future trend analysis. Challenges involve establishing a true “as‑new” condition and ensuring consistent measurement techniques. Related terms: trend monitoring, condition baseline
Safety Interlock Verification #
Testing of devices that prevent equipment operation when unsafe conditions exist. Example: Confirming that a conveyor guard switch disables the motor when the guard is open. Practical application enforces compliance with safety regulations. Challenges include mechanical wear, electrical failure, and inadvertent bypass. Related terms: machine safeguarding, lockout/tagout
Seal Face Wear Assessment #
Inspection of the contact surfaces of a mechanical seal for abrasion or deformation. Example: Visual and thickness measurement of seal faces on a high‑pressure pump. Practical application maintains seal performance and prevents leaks. Challenges include limited visibility, abrasive media, and seal material compatibility. Related terms: seal integrity, leakage prevention
Shock Absorber Function Test #
Evaluation of the ability of a damper to dissipate energy from impacts. Example: Dropping a weight onto a loader’s suspension and measuring rebound. Practical application ensures operator comfort and component protection. Challenges involve repeatability, sensor placement, and material fatigue. Related terms: damping performance, vibration isolation
Signal Conditioning Calibration #
Adjustment of electronic circuits that amplify, filter, or convert sensor outputs to ensure accurate measurement. Example: Calibrating the signal conditioner for a strain gauge on a crusher frame. Practical application improves data fidelity for analysis. Challenges include drift, temperature sensitivity, and noise introduction. Related terms: sensor interface, data accuracy
Site‑Specific Risk Assessment #
Evaluation of hazards associated with equipment operation in a particular mine environment. Example: Assessing the risk of hydraulic line rupture in a high‑altitude open‑pit site. Practical application informs mitigation measures and emergency response planning. Challenges include variable geology, weather conditions, and equipment diversity. Related terms: hazard analysis, safety planning
Skin Friction Coefficient Determination #
Measurement of the resistance between a material surface and a moving fluid. Example: Testing the friction between conveyor belt and dust‑laden air flow. Practical application influences belt selection and drive power calculations. Challenges include replicating operational flow rates and surface roughness. Related terms: fluid dynamics, drag analysis
Sleeve Bearing Clearance Check #
Verification of the gap between a bearing sleeve and its housing. Example: Using feeler gauges to measure clearance on a hydraulic pump bearing. Practical application ensures proper oil film formation and reduces wear. Challenges involve thermal expansion and measurement repeatability. Related terms: bearing clearance, oil film
Smart Sensor Deployment #
Installation of sensors with built‑in processing and communication capabilities. Example: Embedding a smart vibration sensor on a crusher spindle that sends alerts when thresholds are exceeded. Practical application reduces wiring complexity and enables edge analytics. Challenges include power supply, firmware updates, and cybersecurity. Related terms: IoT, edge computing
Spall Inspection #
Examination for flaking or delamination of material surfaces, often caused by fatigue. Example: Visual and ultrasonic inspection of a crusher housing for metal spall. Practical application prevents crack initiation and structural failure. Challenges include detecting subsurface spall and differentiating from surface scratches. Related terms: fatigue damage, surface degradation
Static Load Test #
Application of a non‑varying load to evaluate component deformation under steady conditions. Example: Applying a known weight to a hydraulic cylinder rod to measure deflection. Practical application verifies design load capacity and stiffness. Challenges involve load application accuracy and measurement precision. Related terms: deflection testing, structural analysis
Strain Gauge Installation #
Process of attaching a sensor that converts mechanical deformation into electrical signals. Example: Bonding a foil strain gauge to a crusher frame to monitor stress during operation. Practical application provides real‑time load data for structural health monitoring. Challenges include proper bonding, temperature compensation, and signal noise reduction. Related terms: stress monitoring, sensor mounting
Surface Roughness Measurement #
Quantification of the texture of a machined or worn surface. Example: Using a profilometer to assess the roughness of a gear tooth flank. Practical application influences lubrication effectiveness and wear rate. Challenges include probe contamination, measurement direction, and repeatability. Related terms: texture analysis, wear prediction
Thermal Expansion Compensation #
Adjustment of clearances and tolerances to account for material growth with temperature. Example: Designing a hydraulic cylinder with expansion joints to accommodate temperature swings. Practical application prevents binding and leakage in high‑temperature environments. Challenges involve accurate coefficient data and predicting operating temperature range. Related terms: dimensional change, thermal design
Torque Wrench Verification #
Calibration of a torque applying device to ensure accurate preload on fasteners. Example: Verifying a click‑type torque wrench used on a crusher gear bolting. Practical application guarantees proper bolt tension and prevents loosening. Challenges include wrench wear, temperature effects, and user technique. Related terms: fastener preload, calibration
Transmission Gearbox Oil Analysis #
Laboratory testing of gearbox oil to detect wear particles, water, and oxidation. Example: Spectrometric analysis of oil from a crusher gearbox. Practical application identifies gear wear trends and informs oil change intervals. Challenges involve sampling contamination, interpreting particle size distribution, and establishing action thresholds. Related terms: oil monitoring, wear debris analysis
Ultrasonic Thickness Gauging #
Use of high‑frequency sound waves to measure material thickness without removing material. Example: Gauging the wall thickness of a hydraulic cylinder using an ultrasonic probe. Practical application detects corrosion or erosion without disassembly. Challenges include surface curvature, acoustic couplant selection, and signal attenuation. Related terms: non‑destructive testing, wall loss
Variable Frequency Drive (VFD) Diagnostics #
Evaluation of a VFD’s performance parameters such as harmonic distortion and motor current. Example: Reviewing VFD logs for a conveyor motor to identify abnormal start‑up currents. Practical application optimizes motor control and reduces energy consumption. Challenges include interpreting complex data sets and firmware compatibility.