Special Features:

3 holes 0.169 in. Dia.; 1 hole 0.410 in. Dia.; heat treat to rc31-36 per mil-h-687 (140-160 ksi tensile strength); gear no. 1 data: tooth form=fulldepth, no. Of teeth=21, diametral pitch=1.2, pitch dia.=1.7500, pressure angle=20 deg., addendum=0.0833, root dia.=1.542, max. Tooth thk.=0.1289, pin dia.=0.1440, testing pressure(oz)=29-35, center distance radius=0.8739, max. Tooth-tooth composite error=0.00146, max. Total composite error=0.00351, no. Of teeth mating gear=70; gear no. 2 data: tooth form=full depth, no. Of teeth=21, diametralpitch=7.257, pitch dia.=2.8937, pressureangle=20 deg., addendum=0.1378, root dia.=2.549, max. Tooth thk.=0.2145, pin dia.=0.24686, testing pressure(oz) =33-39, max. Tooth-tooth composite error=0.00170, max. Total composite error=0.00569, no. Of teeth mating gear=28, center distance=3.3759

Properties:

A cylindrical item having a full 360 degree (6.282 radians) complement of teeth on two or more surfaces. It may be a one-piece casting or composed of two or more separate items firmly held together by welding, rivets, pins, or the like, to form a single unit. It is designed to mount on a shaft. For items consisting of a shaft with an integral complement(s) or gear teeth, see gearshaft (as modified). Excludes gear subassembly, speed decreaser.