MP-39 · GEARS
Spur Gear Geometry
Calculate basic spur-gear ratio, pitch diameters, center distance, and driven speed from module, tooth counts, and driver speed.
Preliminary design support. Your inputs and results stay in this browser.
WHAT THIS SCREEN ANSWERS
Spur gear geometry establishes ratio, pitch diameter, center distance, and speed before tooth force or rating is considered. The screen applies the module and tooth-count relationships directly to the entered pair. Treat the result as a checkpoint in the load path rather than a verdict.
Undercut, pressure angle, contact ratio, backlash, tooth form, materials, lubrication, and manufacturing quality can govern a real gear. Confirm gear standard, tooth geometry, center distance tolerance, backlash, materials, lubrication, and supplier rating method. It may matter before the nominal value does.
Spur gear geometry establishes ratio, pitch diameter, center distance, and speed before tooth force or rating is considered. Undercut, pressure angle, contact ratio, backlash, tooth form, materials, lubrication, and manufacturing quality can govern a real gear. Use the page to reveal sensitivity before adding detail to the model.
The screen applies the module and tooth-count relationships directly to the entered pair. Confirm gear standard, tooth geometry, center distance tolerance, backlash, materials, lubrication, and supplier rating method. The decision remains specific to this application because spur gear geometry establishes ratio, pitch diameter, center distance, and speed before tooth force or rating is considered. Check the final application against current technical documentation.