They are available in plastic
Bearing insert with 2 set screws has longer inner race for added load support
Click here for spec sheets: SUCNPT Spec Sheet
Click here for spec sheets: SUCNPFL Spec Sheet
Just ask your CSR which is best for you
ND64 Cast Iron Spur Gear 3.875" ID They are available in plasticBoston 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