Gearbox service life calculation: average torque, average speed and rated life
How precision reducer life is rated, how to reduce a duty cycle to average torque and speed, and two worked life calculations for an RV reducer and a…
Engineering
Sizing guides with worked examples, and application notes showing which gearbox suits which axis. Written by the engineers who size and adapt our gearboxes.
Gear ratio formulas for planetary, cycloidal, harmonic and RV reducers
The ratio formula for each precision reducer type, tooth-count tables for standard ratios, and how to get output speed and torque, with worked exampl…
Mounting a servo or stepper motor to a gearbox: flange dimensions and coupling guide
The four dimensions that fit any motor to any gearbox, reference tables for NEMA 17, 23 and 34 steppers and common servo frames, and how clamping hub…
Gearbox backlash explained: arcmin, lost motion, hysteresis and how much you need
What backlash means on a datasheet, how it is measured, how it differs from lost motion and hysteresis, and a table converting arcmin to millimetres…
How to size a servo gearbox: ratio, torque and inertia, with a full worked example
A step-by-step method to choose the ratio and frame size for a servo axis: speed, inertia ratio, peak and RMS torque, and emergency stop, worked for…
Planetary vs harmonic vs cycloidal vs RV: how to choose a gearbox for robotics
A data-backed comparison of the four precision reducer types used in robots and automation: ratio, backlash, stiffness, efficiency and shock capacity…
Gearbox simulator
Change tooth counts on an RV, harmonic, planetary or cycloidal gearbox and watch the ratio, output speed and torque update.
Shaft sizes do not match? We make the coupling
Every gearbox can be joined to any motor, robot joint or housing: we machine a custom coupling bored to both shafts, plus an adapter flange if the mounting faces differ. Send both shaft sizes, a drawing or just the motor model number.
Get a custom coupling- Send your requirementMotor model, shaft and pilot sizes, or a STEP/PDF drawing.
- We confirm the designA 2D drawing and quote from our engineers within 48 working hours.
- We machine and assembleCoupling, flange or housing is fitted and tested with the gearbox before dispatch.