dimensions are the same (except "z" is longer
ISO Certificate
While 20° PA is generally recognized as having a higher load-carrying capacity
Click here for spec sheets: CUCTFB Spec Sheet
Allows you room to re-bore the ID without damaging the clamp screws
NB64 Cast Iron Spur Gear 2-3/4" ID dimensions are the same (exceptBoston 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