MILLING MACHINE OPERATIONS - OD1644 - LESSON 1/TASK 1
FIGURE 21.
WOODRUFF KEYWAY MILLING.
m.
Gear Cutting.
(1)
General.
Gear teeth are cut on the milling machine using formed
milling cutters called involute gear cutters.
These cutters are
manufactured in many pitch sizes and shapes for different numbers of teeth
per gear (table 4 on the following page).
(2)
Operation. If involute gear cutters are not available and the teeth
must be restored on gears that cannot be replaced, a lathe cutter bit can be
ground to the shape of the gear tooth spaces and mounted in a flycutter for
the operation. The gear is milled in the following manner:
NOTE
This method of gear cutting is not as accurate as using an
involute gear cutter and should be used only for emergency
cutting of teeth.
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