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GEAR CLEARANCE INSTRUCTIONS

gearclearancefig1.TIF (111066 bytes)

FIG. 1 A view of two meshing gears showing gear clearance.
When setting up the gear train, sufficient clearance must be allowed between two meshing gears. Gear clearance does not reduce the accuracy of a thread cutting operation because all play, or back lash, is taken up in one direction.

A SUGGESTED METHOD TO OBTAIN PROPER GEAR CLEARANCE IS:

1. Place a sheet of thick wrapping paper (as in grocery bags) between the teeth of two meshing gears.

2. Tighten gears in position.

3. Remove paper.

Clean gears occasionally to remove any chips that become lodged in the gear teeth. Chips in the gear teeth result in inaccuracies when cutting screw threads. A wad of cloth placed in the rear end of spindle will prevent chips from working into gear teeth.

LUBRICATION

A small amount of S.A.E. #30 motor oil or grease, we recommend Keystone #122 Gear Lubricant, or equivalent, applied to the gear teeth will aid in obtaining smoother, quieter operation.

NOTE: Oil on gear teeth must be removed before applying grease.

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