Technical Articles

Drives & Motors

VFD Control Modes: V/Hz, Sensorless and Closed-Loop

V/Hz, sensorless vector and closed-loop vector are the main VFD control modes. What each does, where low-speed torque differs and how to pick one.

October 9, 2026 Drives & Motors

Worm Gears: The Self-Locking Myth and Back-Driving

Worm gears lock only under certain conditions, and vibration can defeat it. What decides back-driving, efficiency and heat, and when to add a brake.

October 9, 2026 Bearings & Power Transmission

Clutches and Brakes: Types and How to Choose

Friction, electromagnetic, spring-applied, one-way, cam and centrifugal clutches and brakes compared, with what to size for and when you want a fail-safe.

October 9, 2026 Bearings & Power Transmission

Plain Bushings and Sleeve Bearings: Types and Sizing

Bronze, sintered, polymer and steel-backed bushings compared: how to size one, shaft hardness and finish, and when a plain bearing beats a rolling one.

October 9, 2026 Bearings & Power Transmission

Types of Gears: Spur, Helical, Bevel, Worm and More

The main gear types and how they differ in efficiency, noise, thrust and shaft layout, with a comparison table and notes on backlash and module vs pitch.

October 9, 2026 Maintenance & Reliability

Spun Bearing Race: Creep, Fretting and What to Do

A bearing ring that turns on its shaft or in its housing is a fit problem. How to spot it, what causes it, what repairs hold, and which are only a stopgap.

October 9, 2026 Bearings & Power Transmission

Deep Groove Bearing Series 60, 62, 63 Explained

Series 60, 62 and 63 deep groove bearings share a bore but differ in outside diameter, width and load. How the numbers work, with a dimension table.

October 9, 2026 Bearings & Power Transmission

Bearing Precision Classes: ABEC and ISO Explained

ABEC 1/3/5/7/9 and ISO P0/P6/P5/P4/P2 rate how tightly a bearing is made. What they cover, what they leave out, and when a higher class pays off.

October 9, 2026 Electrical Control & Protection

What Is a Line Reactor and When a VFD Needs One

A line reactor is an inductor on the AC input of a drive that smooths current and absorbs spikes. What it does, when a VFD needs one and how to choose it.

October 8, 2026 Sensors & Measurement

What Is an Ultrasonic Sensor? How It Works

An ultrasonic sensor measures distance or detects objects by timing a sound pulse. How it works, the main types, and what to check before you choose one.

October 8, 2026 Sensors & Measurement

What Is a Fiber Optic Sensor and When to Use One

A fiber optic sensor carries light through a thin cable to detect tiny parts or reach tight spots. How it works, the fiber types, and when to use one.

October 8, 2026 Sensors & Measurement

Pressure Gauge Types, Ranges and How to Read One

A pressure gauge shows the pressure in a system on a dial. The main types, how to pick a range, what the markings mean, and mistakes to avoid when fitting one.

October 8, 2026 Sensors & Measurement

What Is a Differential Pressure Transmitter?

A differential pressure transmitter measures the difference between two pressures and sends it as a signal. How it works, where it is used, and what to check.

October 8, 2026 Electrical Control & Protection

Ground Fault Protection: GFCI, GFPE and Relays

Ground fault protection detects current leaking to ground. How GFCI, GFPE and ground fault relays differ, how they work and what to check when choosing.

October 8, 2026 Electrical Control & Protection

Dynamic Braking and Braking Resistors on a VFD

Dynamic braking burns off a motor's regenerated energy as heat in a resistor so a VFD can stop loads fast. How it works, how to size one and common mistakes.

October 8, 2026 Electrical Control & Protection

What Is an Industrial UPS and When to Use One

An industrial UPS keeps control equipment running through a power loss. The main types, how to size one for a PLC panel and the mistakes to avoid.

October 8, 2026 Hydraulics & Fluid Power

What Is a Butterfly Valve? Types and Uses

A butterfly valve controls flow with a disc that turns a quarter turn in the pipe. How it works, the main types, and what to check before you choose one.

October 8, 2026 Seals & Sealing

Mechanical Seal vs Packing on Pump Shafts

Packing seals a pump shaft with compressed rings that weep slightly, a mechanical seal uses two flat faces. How each works and how to choose between them.

October 8, 2026 Pneumatics & Air Systems

Pneumatic Valve Actuators: Quarter-Turn Explained

A quarter-turn pneumatic actuator uses compressed air to rotate a valve 90 degrees. How it works, double-acting vs spring-return, and how to choose one.

October 8, 2026 Fasteners, Materials & Finishes

What Is a Retaining Ring? Circlip Types and Uses

A retaining ring, or circlip, is a springy ring that sits in a groove to hold parts on a shaft or in a bore. How the main types work and what to check.

October 8, 2026 Fasteners, Materials & Finishes

Dowel, Roll and Clevis Pins: The Difference

Dowel pins locate, roll pins hold with spring tension, and clevis pins form pivots. How the three differ and how to pick the right one.

October 8, 2026 Maintenance & Reliability

ISO VG Viscosity Grades Explained

An ISO VG number is the oil's viscosity at 40 degrees C. What the grades mean, what they leave out and how to pick the right one for gears and hydraulics.

October 8, 2026 Machine Safety & Guarding

What Is a Two-Hand Control and When Is It Needed

A two-hand control makes an operator keep both hands on separate buttons to start a hazardous motion. How it works, its types, and what to check.

October 8, 2026 PLC, HMI & Industrial Networking

What Is OPC UA and Why Plants Use It

OPC UA is a vendor-neutral protocol for moving industrial data between machines, controllers and software. How it works and what to check before using it.

October 8, 2026 Fasteners, Materials & Finishes

Washers Explained: Flat, Lock and Spring Types

A washer spreads a bolt's clamp load, protects the surface and can help keep a joint tight. The main flat, lock and spring types and how to choose.

October 8, 2026 PLC, HMI & Industrial Networking

What Is an Industrial Gateway? What It Connects

An industrial gateway translates between different protocols or networks so equipment that cannot talk directly can share data. Types and what to check.

October 8, 2026 Electrical Control & Protection

Multimeter vs Clamp Meter: Which Do You Need?

A multimeter measures voltage, resistance and current inside a circuit; a clamp meter reads current without breaking it. Here is which one fits which job.

October 8, 2026 Electrical Control & Protection

Insulation Resistance Testing (Megger) Explained

An insulation resistance test applies a DC voltage to check how well wire or winding insulation holds up. How it works, what to record and the safety steps.

October 8, 2026 Sensors & Measurement

What Is Instrument Calibration? Why Readings Drift

Calibration compares an instrument against a better reference and records the error. Why sensors and gauges drift, and how often and how to check them.

October 8, 2026 Maintenance & Reliability

What Is a Centralized Lubrication System?

A centralized lubrication system delivers grease or oil from one pump to many points automatically. How it works, the types and what to check when choosing.

October 8, 2026 Sensors & Measurement

Level Sensor Types and Which One Fits Your Tank

Float, capacitance, ultrasonic, radar, hydrostatic, vibrating fork and conductive probe level sensors compared by how they work and where they struggle.

October 7, 2026 Electrical Control & Protection

What Is a Transformer? Types and How to Size One

A transformer changes AC voltage from one level to another through magnetic coupling. The main types, what the nameplate means, and how to size one.

October 7, 2026 Electrical Control & Protection

Buck-Boost Transformers: What They Do and Limits

A buck-boost transformer nudges a supply voltage up or down by a small amount. How it is wired, when it works, and where it falls short.

October 7, 2026 Electrical Control & Protection

What Is a Disconnect Switch? Fusible vs Non-Fusible

A disconnect switch isolates equipment from its power supply so it can be worked on safely. Fusible vs non-fusible, load-break ratings, and lockout.

October 7, 2026 Electrical Control & Protection

Motor Protection Circuit Breakers (MPCB) Explained

An MPCB gives one motor manual switching, overload and short-circuit protection. How it differs from an MCCB and from fuses plus an overload relay.

October 7, 2026 Electrical Control & Protection

What Is a Surge Protective Device (SPD)?

An SPD diverts voltage spikes away from sensitive equipment. The type 1, 2 and 3 idea, where each goes, what the ratings mean, and why they wear out.

October 7, 2026 Design Calculations & Reference

What Is Power Factor? kW vs kVA in Plain Words

Power factor is the ratio of useful power (kW) to total apparent power (kVA). Why motors and drives lower it, how correction works, and why bills care.

October 7, 2026 Drives & Motors

What Is an AC Motor? Induction, Synchronous and PM

An AC motor turns alternating current into rotation. How squirrel-cage, wound-rotor, synchronous and permanent-magnet motors differ and where each is used.

October 7, 2026 Drives & Motors

Single-Phase vs Three-Phase Motors Explained

Three-phase motors start and run more simply than single-phase ones. How they differ, how to read dual-voltage nameplates and what a VFD can and cannot do.

October 7, 2026 Drives & Motors

Motor Efficiency Classes: IE Ratings and NEMA Premium

What the IE1 to IE4 classes and NEMA Premium mean, how they relate in Canada and North America, and why efficiency matters when replacing a motor.

October 7, 2026 Drives & Motors

What Is a Gearmotor? Types, Ratings and Selection

A gearmotor is an electric motor built together with a gear reducer. Helical, worm, bevel-helical and planetary types, plus service factor and mounting.

October 7, 2026 Bearings & Power Transmission

Shaft Coupling Types and What Each One Tolerates

A shaft coupling joins two shafts to transmit torque. Rigid, jaw, gear, disc, grid, bellows and Oldham types, and how each handles misalignment.

October 7, 2026 Drives & Motors

Motor Controller vs Starter vs Drive Explained

Motor controller, starter and drive are used loosely. What each term means in practice, from DOL and reversing to soft starters, VFDs and servo drives.

October 7, 2026 Bearings & Power Transmission

What Is a V-Belt? Sizes, Sections and Matching

A V-belt is a wedge-shaped rubber belt that grips a grooved sheave. How the classical, narrow, fractional-HP and banded sections differ.

October 7, 2026 Bearings & Power Transmission

Sheaves, Pulleys and Bushings: QD vs Taper-Lock

A sheave is a grooved wheel that carries a belt on a shaft. How fixed-bore and bushed sheaves differ, and how QD and taper-lock bushings grip.

October 7, 2026 Linear Motion & Actuation

What Is a Linear Motion Bearing? Types Compared

A linear motion bearing guides a load along a straight path with low friction. The main types, from ball bushings to profile rail, and what each tolerates.

October 7, 2026 Hydraulics & Fluid Power

What Is a Hydraulic Accumulator and How It Works

A hydraulic accumulator stores fluid under pressure using a gas cushion. How bladder, piston and diaphragm types work, and how to stay safe.

October 7, 2026 Electrical Control & Protection

Pushbuttons, Selector Switches and Pilot Lights

Operator devices on a control panel: how pushbuttons, selector switches and pilot lights differ, how contact blocks work, and what the colours mean.

October 7, 2026 Pneumatics & Air Systems

What Is an Air Compressor? Main Types Compared

An air compressor turns power into compressed air. Piston, rotary screw, scroll and centrifugal types, oil-flooded vs oil-free, and how to size one.

October 7, 2026 Hydraulics & Fluid Power

What Is a Check Valve? Types and How They Work

A check valve lets fluid pass one way and blocks the return. Swing, lift, ball, spring-loaded, dual-plate and pilot-operated types compared.

October 7, 2026 PLC, HMI & Industrial Networking

How to Learn PLC Programming From Scratch

PLC programming means writing the logic a controller runs. The IEC 61131-3 languages in plain terms, and a practical path to learn them.

October 7, 2026 PLC, HMI & Industrial Networking

What Is Node-RED? Where It Fits in a Plant

Node-RED is a flow-based tool for wiring data between devices, databases and dashboards. What it does well, and where a PLC must still do the work.

October 7, 2026 Enclosures, Wiring & Cable

Industrial Cable Types Explained

Control, power, instrumentation, VFD, tray, flexible and thermocouple cable: what each is built for, and how to read jackets, ratings and gauge.

October 7, 2026 PLC, HMI & Industrial Networking

Managed vs Unmanaged Industrial Ethernet Switches

An unmanaged switch just passes traffic. A managed switch adds VLANs, redundancy, QoS and monitoring. When each makes sense in a plant.

October 7, 2026 Sensors & Measurement

The 4-20 mA Signal Explained: Why Industry Uses It

The 4-20 mA loop carries a measurement as current, so long cables and noise matter less. Live zero, 2-wire vs 4-wire, scaling and troubleshooting.

October 7, 2026 Bearings & Power Transmission

What Is a Shaft Collar? Types and How They Hold

A shaft collar is a ring clamped on a shaft as a stop, spacer or locating shoulder. Set-screw, clamp, two-piece and threaded types compared.

October 7, 2026 Hydraulics & Fluid Power

Hydraulic Filters: Types and How to Choose One

A hydraulic filter removes particles from oil to protect pumps and valves. Pressure, return, suction and kidney-loop types, beta ratio and bypass.

October 7, 2026 Sensors & Measurement

What Is a Magnetic Flow Meter and How Does It Work?

A magnetic flow meter measures conductive liquid flow in a pipe using a magnetic field. How it works, where it fails and how to install one.

October 7, 2026 Sensors & Measurement

What Is a Load Cell and How Does It Weigh?

A load cell turns force into an electrical signal using strain gauges. Types, mV/V output, wiring, mounting and the overload mistakes that ruin them.

October 7, 2026 PLC, HMI & Industrial Networking

Modbus RTU vs Modbus TCP: What Is the Difference?

Modbus RTU runs over a serial two-wire bus, Modbus TCP over Ethernet. How each works, how to wire the bus, and the settings that cause most failures.

October 7, 2026