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Profile Shift in External Parallel Axis Cylindrical Involute Gears - November/December 2001

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Archive > 2001 > November/December 2001 > Profile Shift in External Parallel Axis Cylindrical Involute Gears

The article "Profile Shift in External Parallel Axis Cylindrical Involute Gears" appeared in the November/December 2001 issue of Gear Technology.

Summary
Early in the practice of involute gearing, virtually all gears were made with the teeth in a standard relationship to the reference pitch circle. This has the advantages that any two gears of the same pitch, helix angle and pressure angle can operate together, and that geometry calculations are relatively simple. It was soon realized, though, that there are greater advantages to be gained by modifying the relationship of the teeth to the reference pitch circle. The modifications are called profile shift.

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