YJ21-1 1/4 Steel Spur Gear 1-7/8" Tube always remember that the difference

always remember that the difference in the number of teeth between the internal gear and pinion should not be less than 15 (14 1/2° PA) or 12 (20° PA)

KWY/Setscrew/Other: No KWY or Setscrew

Click here for spec sheet: SUCNPP Spec Sheet

and cast iron to suit your application’s requirements

YJ21-1 1/4 Steel Spur Gear 1-7/8" Tube always remember that the differenceBoston Gear spur gears are designed to transmit motion and power between parallel shafts. The different styles offered include spur, gear rack, pinion wire, stem pinions, and internal gears, and most come with a selection of bore diameters, keyways, and setscrews to accommodate a wide variety of application requirements. They are available in plastic, non metallic, brass, steel, and cast iron and are manufactured in a variety of styles, including