Martin B1218-4 Plain Bevel Gear, Bevel Pinion Gear, 12 Diametral Pitch, 20 deg Pressure Angle, 18 Teeth, 1-1/2 in Dia Pitch, 0.6 in W Face, 0.5 to 0.626 in Dia Bore, Steel

Bevel gears are used as right angle drives where high efficiency is required. They are carried in stock as 1:1 to 6:1 ratios. Bevel gears are cut with the long and short addendum system and 20 deg pressure angle to compensate for tooth undercut in gears and pinions having low numbers of teeth. Most all of Martin bevel gears are cut with the coniflex tooth form to allow for a slight misalignment at assembly and during operation. Gears should be mounted at the correct distance from the core of apex center with thrust bearings being used in back of hubs to absorb the backward thrust created in this type of gearing.