Weldun Engineering Vintage 1960's Pinion Gear - 21 Tooth 64 Pitch 0.090" (2.3mm) Bore - Setscrew Mount - NOS (New Old Stock) - STAINLESS STEEL Ultra Smooth & Quiet Gear Mesh - #4-40 Allen Drive Setscrew with 0.050" (1.27mm) Hex - These gears were strong and light weight making them the gears of choice for the 1960's Rail Type Dragsters that ran on an incredible 36 volts - Perfect compliment for the Weldun Aluminum 64 Pitch Axle Gears - GREAT GEARS for any ROBOTICS Project with their smoothness & high efficiency !
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