What is the normal range for gear meshing clearance?

1 Answers
DeQuinn
07/30/25 5:29am
Gear meshing clearance of 3ml~4ml is normal. The following is relevant information about gears: Design criteria: There must be proper tooth side clearance during gear meshing. This ensures the formation of normal lubricating oil film between tooth surfaces and prevents gear teeth from jamming due to thermal expansion deformation caused by increased working temperature. Categories: Normal backlash: The shortest distance between non-working tooth surfaces when the working tooth surfaces of two gears are in contact. Circumferential backlash: In a pair of meshing gears, when one gear is fixed, the maximum arc length of pitch circle that the other gear can rotate. Meshing clearance: When a pair of meshing cycloidal gears and pin gears are in theoretical meshing position, the shortest distance measured between the cycloidal gear tooth profile and pin gear tooth profile on the connecting line between a pin tooth center and the node.
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