Thomas, Hugh Kerr · New York, McGraw-Hill Book Company, Inc.; [etc., etc.] · leaf 66
fect of varying /? in a specific instance. An axle was taken fitted with a standard worm gear similarto many hundreds running in heavy commercial vehicles of theauthors design and giving eminently satisfactory results. Thegear was driven from a 50-H. P. electric motor running at aconstant speed,… … 6 54 WORM GEARS Worm: Number of threads 5 Pitch diameter <• 3.25 in. Pitch circumference 10.21 in. Length of worm 5 in. Lead 5. 9375 in. Lead angle 30° 11 Thread angle • 60° Length of thread per rev 11.812 in. Rubbing speed 18.5/. p. s. Worm Wheel: No. of teeth 39 Pitch diameter , 14.75 in.…
Gearing, Worm
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