Thomas, Hugh Kerr · New York : McGraw-Hill Book Co. · leaf 66
^ commercial vehicles of theauthors design and gi^ing eminently satisfactory results. Thegear was driven from a 50-H. P. electric motor running at aconstant speed, and an hydiaulic d^mamometer was attachedto the other side of the gear, and adjusted to furnish a constantload (Fig. 21 A). The… … <1—) d 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. Pitch…
Gearing, Worm
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