MACHINE SHOP CALCULATION - OD1640 - LESSON 2/TASK 2
(2) Worm and Worm Gearing. Worm gearing is used to transmit power between
two shafts at 90,, to each other, but not in the same plane.
In worm
gearing, the velocity ratio is the ratio between the number of teeth on the
gears and the number of threads on the worm. Figure 11 shows a worm and a
single-threaded worm gear.
EXAMPLE
Find the revolutions per minute (rpm) for the worm gear.
20 x 60 = 1200
Convert 20 revolutions-per-second of the single
worm to rpm by multiplying by 60 seconds.
Therefore
FIGURE 11.
WORM GEAR SYSTEM.
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