Robinson Racing 0170 Steel Alloy Motor Pinion Gear 18 Bore 32 Pitch 17 Tooth

32 pitch alloy pinions are not heat treated and should only be used with plastic spur gears. If you only run plastic spur gears These pinions are the perfect choice. In sizes 9 through 22 teeth. 1/8 inch bore. One 5-40 set Screw included. 1/16 inch Allen wrench (not included) Fits the 5/40 set screw. 32 pitch alloy pinions are not marked with tooth number.