Engineering guide
Worm Gear Backlash Guide
Backlash definition, measurement, thermal effects, duplex adjustment and zero-backlash risks for custom worm gear RFQs and design review.
Backlash definition, measurement, thermal effects, duplex adjustment and zero-backlash risks for custom worm gear RFQs and design review.
Backlash allows lubricant film, thermal expansion and manufacturing variation. Zero backlash can cause binding and heat.
State center distance, temperature, measuring torque, rotation direction and where the movement is measured.
A dual-lead set can vary tooth thickness along the worm axis, allowing controlled adjustment by axial movement.
Adjustment can compensate for some wear, but it cannot correct damaged profiles, misalignment or bearing play.
Backlash readings include the effects of shaft deflection, bearing clearance, key movement and housing compliance.
Define initial, running and maximum allowable backlash values in the machine specification.
General context derived from connected worm gear catalogues and current official standards information. Product-specific values must be calculated for the actual design.