Technical Articles

Maintenance & Reliability

Buying Surplus and New-Old-Stock Industrial Parts Safely: What to Verify

Surplus and new-old-stock can be the fastest route to a discontinued part. Here is what to check before you accept it.

September 19, 2026 Selection & Comparison Guides

Drop-In Replacement Checklist: What Must Match Before You Swap an Industrial Part

A part that fits is not always a part that works. A practical checklist for judging whether a replacement is truly drop-in.

September 19, 2026 Selection & Comparison Guides

Independent Distributor vs. Manufacturer Lead Time: What Actually Gets Your Line Running

How an independent distributor helps with long lead times, hard-to-find and obsolete parts, and verified drop-in replacements.

September 19, 2026 PLC, HMI & Industrial Networking

Industrial Ethernet Cable: Category, Shielding, Solid vs Stranded and the 100 m Limit

How to choose industrial Ethernet cable: category, two-pair versus four-pair, solid versus stranded, shielding, jacket and the 100 m channel limit.

September 19, 2026 Linear Motion & Actuation

Linear Shafting and Ball Bushings: Hardness, Tolerance, Deflection and Support

How to choose linear shafting and ball bushings: shaft hardness and tolerance, bushing types, a worked deflection check, and when to support the shaft along its.

September 19, 2026 Maintenance & Reliability

Motor Brake Slipping or Not Releasing: A Troubleshooting Guide

Symptom-based diagnosis for spring-set motor brakes that slip, drag, will not release, set late or run hot, with the checks in the order that finds the cause.

September 19, 2026 Enclosures, Wiring & Cable

Enclosure Cooling: Sizing a Filter Fan, Heat Exchanger or Air Conditioner

How to work out whether a control panel needs cooling: heat load, wall dissipation, airflow for a filter fan, and when to move to an air conditioner.

September 19, 2026 PLC, HMI & Industrial Networking

Machine Vision Basics: Choosing Camera Resolution, Lens and Lighting

How to specify an industrial vision system: the resolution a defect needs, how field of view sets it, lens choice, and why lighting decides whether an.

September 19, 2026 Drives & Motors

Spring-Set Motor Brakes: Selecting Torque, Voltage and NEMA Frame

How to choose a spring-set (fail-safe) disc brake for an AC motor: torque sizing, coil voltage, NEMA C-face frame, adjustment, enclosure and wear parts.

September 19, 2026 Hydraulics & Fluid Power

Instrument Tube Fittings: Materials, End Connections and Pressure Ratings

How twin-ferrule compression tube fittings seal, and how to choose body material, tube size, end connection and pressure rating without a leak.

September 19, 2026 PLC, HMI & Industrial Networking

Pneumatic and Electric Grippers: Sizing Grip Force and Stroke

Learn how to size grip force and stroke for industrial grippers, including force calculations, safety factors, and considerations for pneumatic vs. electric.

September 19, 2026 Selection & Comparison Guides

Ordering the Exact Part: Why Near-Identical Part Numbers Are Not Interchangeable

A practical checklist for maintenance and purchasing: why a one-character change in an industrial part number is a different part, and what to send before you.

September 19, 2026 Hydraulics & Fluid Power

What the ASME "UV" Stamp on a Safety Relief Valve Actually Certifies

The ASME UV stamp and National Board registration on a relief valve are specific, verifiable certifications — not generic quality marks.

September 13, 2026 Selection & Comparison Guides

Why Searching a Parts Catalog by Manufacturer Name Can Quietly Miss Results

Brand-name misspellings, sub-brand splits, and unrelated companies with similar names can all make a distributor catalog search miss real listings.

September 13, 2026 Bearings & Power Transmission

Why Your "Authorized NSK Distributor" Might Not Be Able to Quote a Super-Precision Bearing

NSK splits its authorized network into two categories, and an industrial-only distributor cannot quote the super-precision spindle line at all.

September 12, 2026 Linear Motion & Actuation

Why an Oriental Motor DR-Series Actuator Quote Can Say 5 Weeks From One Desk and 14 From Another

A factory-level lead-screw shortage, not distributor inventory, is behind stalled Oriental Motor DR-series quotes right now — how to confirm it.

September 12, 2026 Maintenance & Reliability

One Part, Four Part Numbers: Why MRO Records Drift and How to Clean Them Up

Duplicate part numbers hide phantom stock, distort criticality rankings and break obsolescence monitoring. A safe method for cleaning up MRO item records.

August 29, 2026 Bearings & Power Transmission

Identifying the Right Replacement Bearing by Physical Dimensions

Learn how to identify replacement bearings using bore diameter, outer diameter, width, and seal types when part numbers are unavailable.

August 23, 2026 Maintenance & Reliability

Building a Proactive Obsolescence Watch List for Critical Industrial Spares

Learn how to build a proactive obsolescence watch list for critical industrial spares to avoid rushed sourcing when parts are discontinued or reach end-of-life.

August 20, 2026 Drives & Motors

Reading a FANUC A06B Part Number, and Why the # Suffix Decides Whether It Fits

A FANUC A06B number is an ordering string, not a name. The four digits after the prefix pick the motor, the block after the B picks the options, and the four digits after the # can be the difference between a shaft your coupling grips and one it slips on. Here is how the string is built and how to read one off a nameplate without guessing.

August 17, 2026 Maintenance & Reliability

Reading Allen-Bradley Lifecycle Status: Active, Active Mature, End of Life, Discontinued

Rockwell Automation publishes a lifecycle status for every Allen-Bradley catalog number, and it is the single field that decides whether you reorder, stock up, or migrate. Here is what the four statuses actually mean, how to look one up correctly, and why an inexact catalog number gives you the wrong answer.

August 16, 2026 Linear Motion & Actuation

Profile Rail Linear Guides: Accuracy Classes and Preload Explained

Profile rail guide selection requires understanding the difference between accuracy class (tolerance and parallelism) and preload class (clearance to heavy).

August 11, 2026 Linear Motion & Actuation

Ball Screw vs Lead Screw: A Selection Reference

Ball screws and lead screws differ in efficiency, back-drivability, and duty cycle. This reference compares the parameters that dictate linear motion design.

August 11, 2026 Machine Safety & Guarding

Safety Interlock Switch Types and Defeat Resistance

A practical reference on guard interlocking devices, covering tongue, hinge, magnetic, RFID-coded, and guard-locking switches, plus defeat resistance.

August 11, 2026 Fasteners, Materials & Finishes

Bolt Property Classes and Grades: Reading the Head Marking

Decode metric property classes, imperial SAE grades, and ASTM markings to understand fastener strength, and learn why mixing bolt and nut grades causes joint.

August 11, 2026 Fasteners, Materials & Finishes

304 vs 316 Stainless: Grades, Corrosion and Where Each Belongs

A practical guide to selecting 300-series stainless steel fasteners, covering the role of molybdenum in 316, low-carbon weldability, galling prevention.

August 11, 2026 Machine Safety & Guarding

Safety Light Curtains: Resolution and Safe Distance

Light curtain specification hinges on resolution and safe distance. Selecting the wrong detection capability or guessing stopping time removes the physical.

August 11, 2026 PLC, HMI & Industrial Networking

PLC I/O Signal Types: A Wiring Reference

A practical wiring reference for PLC digital, analog, and temperature I/O: sinking versus sourcing, leakage current bleed resistors, 4-20mA loops, and RTD.

August 11, 2026 Linear Motion & Actuation

Electric Actuator Selection: Thrust, Speed and Duty

Selecting an electric linear actuator requires calculating thrust from friction and acceleration, matching drive type to duty cycle, and verifying holding.

August 11, 2026 Fasteners, Materials & Finishes

Thread Designations: Metric, UNC/UNF and Pipe Threads

A practical reference for reading thread callouts, distinguishing metric, unified, and pipe threads, and identifying unknown threads in the field.

August 11, 2026 PLC, HMI & Industrial Networking

Industrial Ethernet Protocols: A Comparison Reference

EtherNet/IP, PROFINET, EtherCAT, Modbus TCP and POWERLINK share the RJ45 connector but are not interchangeable. This reference breaks down determinism, cycle.

August 11, 2026 Fasteners, Materials & Finishes

Types of Surface Treatment and Plating

A reference guide to industrial fastener surface treatments, covering electroplating, galvanizing, passivation, anodizing, and dry-film coatings, including.

August 11, 2026 Linear Motion & Actuation

Linear Bearing Life Calculation: The Standard Method

Calculating linear bearing life requires converting dynamic load ratings into distance travelled, not revolutions, while applying modifying factors.

August 11, 2026 Design Calculations & Reference

ISO Tolerances and Fits: Reading H7/g6

Decoding the ISO limits-and-fits system: how letter codes define tolerance zone position and IT grades define width, and why H7/g6 creates a precise running.

August 11, 2026 Conveyors & Material Handling

Roller Chain: ANSI/ISO Designation and Selection

A practical reference on ANSI and ISO roller chain designations, interchangeability dimensions, selection by service factor, wear limits, and sprocket.

August 11, 2026 Machine Safety & Guarding

Emergency Stop Devices: Requirements and Categories

A technical reference on E-stop categories, mandatory device characteristics, rope-pull switches, and the distinction between emergency stop and safe isolation.

August 11, 2026 Hydraulics & Fluid Power

Hydraulic Cylinder Types and Mounting Styles

A practical reference on hydraulic cylinder construction, differential area, cushioning, mounting styles, load-path consequences, rod buckling, and seal.

August 11, 2026 Tooling & Workholding

Tap Drill Sizes and Thread Engagement

Learn how to calculate tap drill sizes for 75% thread engagement, reduce torque, and choose the right tap type for blind or through holes.

August 11, 2026 Design Calculations & Reference

Bolt Torque and Preload: Where the Numbers Come From

Torque is only a proxy for bolt preload. Understand the friction mechanics, the torque-tension relationship, and advanced tightening methods to ensure reliable.

August 11, 2026 PLC, HMI & Industrial Networking

Remote I/O vs Centralised I/O: An Architecture Reference

Comparing centralised and remote I/O architectures: wiring economics, panel space constraints, IP20 versus IP67 on-machine blocks, network dependency, and node.

August 11, 2026 Linear Motion & Actuation

Cable Carrier Sizing and Fill Rules

Practical reference for specifying energy chains: bend radius multiples, fill ratios, unsupported travel limits, and the physical causes of corkscrew cable.

August 11, 2026 Hydraulics & Fluid Power

Hydraulic Fluid Cleanliness and ISO 4406 Codes

ISO 4406 codes dictate hydraulic reliability: each number doubles particle counts above 4, 6, and 14 microns. Learn how to match fluid cleanliness to component.

August 11, 2026 Fasteners, Materials & Finishes

Galvanic Corrosion: The Dissimilar Metals Reference

A practical reference on galvanic corrosion mechanisms, the galvanic series for industrial metals, the critical area ratio effect, and isolation.

August 11, 2026 Tooling & Workholding

Crimp Quality: Ferrules, Lugs and Inspection

Intermittent panel faults usually trace back to a bad crimp.

August 11, 2026 Machine Safety & Guarding

Safety Relay or Safety Controller: A Selection Reference

Choosing between hardwired safety relays and configurable safety controllers requires evaluating function count, diagnostic needs, and logic complexity, not.

August 11, 2026 PLC, HMI & Industrial Networking

Electromechanical vs Solid State Relays: A Reference

A practical comparison of electromechanical and solid state relays covering galvanic isolation, leakage current, zero-cross turn-on, heat derating.

August 11, 2026 Linear Motion & Actuation

Mounting and Aligning Linear Guides

Proper installation of linear guide rails requires strict adherence to datum concepts, surface tolerances, and bolting sequences to prevent binding, uneven.

August 11, 2026 Design Calculations & Reference

Motor Frame Sizes and Mounting Designations

NEMA and IEC motor frame numbers encode shaft height, mounting dimensions, and flange type.

August 11, 2026 Conveyors & Material Handling

Conveyor Belting: Materials, Tracking and Splices

A technical guide to selecting belt materials, diagnosing tracking problems, and choosing the right splice for reliable conveyor operation.

August 11, 2026 PLC, HMI & Industrial Networking

Selecting an HMI: Size, Environment and Interface

A practical guide to choosing the right HMI screen size, touch technology, environmental rating and communication features for reliable operator interfaces.

August 11, 2026 Design Calculations & Reference

Surface Roughness: Ra, Rz and What to Specify

Learn how Ra and Rz differ, why identical Ra values can yield opposite sealing performance, and which roughness levels suit common machining processes.

August 11, 2026 Machine Safety & Guarding

Reading Performance Level and SIL on a Safety Component

Learn how ISO 13849 Performance Levels and IEC 62061 Safety Integrity Levels relate, and how to interpret PL, SIL, B10d and MTTFd for safety components.

August 11, 2026 PLC, HMI & Industrial Networking

Sizing a Control Panel Power Supply

A step‑by‑step guide to selecting a 24 VDC supply that handles continuous load, inrush peaks, temperature, altitude, and redundancy requirements.

August 11, 2026 Linear Motion & Actuation

Round Shaft Bushings vs Profile Rail: Choosing the Guide Type

A detailed comparison of round shaft/ball bushing systems and profile rail guides, with guidance on deflection, rigidity, and application suitability.

August 11, 2026 Hydraulics & Fluid Power

Hydraulic Pump Types: Gear, Vane and Piston

Compare gear, vane and piston hydraulic pumps – fixed vs variable displacement, pressure‑compensation, flow calculation, suction limits and drive.

August 11, 2026 Fasteners, Materials & Finishes

Thread Lockers, Retaining Compounds and Anti-Seize

A technical guide to selecting and applying threadlockers, retaining compounds, and anti‑seize, with safety notes and mechanical alternatives for reliable.

August 11, 2026 Conveyors & Material Handling

Gear Reducer Types and Selecting a Ratio

A practical guide to worm, helical, bevel‑helical, planetary and cycloidal reducers, covering ratio selection, load capacity, mounting and backlash.

August 11, 2026 Design Calculations & Reference

Wire Gauge, Ampacity and Voltage Drop

A detailed guide to AWG sizing, ampacity derating, and voltage‑drop calculations for reliable industrial wiring.

August 11, 2026 PLC, HMI & Industrial Networking

Timer Relay Functions: On-Delay, Off-Delay and the Rest

A technical guide to timer relay functions—on‑delay, off‑delay, one‑shot, flasher, star‑delta and multifunction units—plus when to use hardware timers versus.

August 11, 2026 Tooling & Workholding

Workholding: Clamping Principles and Device Types

A practical guide to the 3‑2‑1 locating principle, the difference between locating and clamping, and how to select toggle, screw, cam or power clamps.

August 11, 2026