Boston Gear R1531 Mod 001 Right-90 Spiral Bevel Gear Drive Spline Shaft 1750rpm. If you have additional questions regarding an item, please contact our staff before purchasing. SIGMA Surplus is a division of SIGMA Equipment INC. We stock a wide variety of items ranging from small parts to complete machines. SIGMA Surplus is a Division of SIGMA Equipment INC. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. Powered by SixBit’s eCommerce Solution. The item “Boston Gear R1531 Mod 001 Right-90 Spiral Bevel Gear Drive Spline Shaft 1750rpm” is in sale since Tuesday, January 19, 2021. This item is in the category “Business & Industrial\Industrial Automation & Motion Controls\Mechanical Power Transmission\Gearboxes & Speed Reducers”. The seller is “sigmasurplus” and is located in Evansville, Indiana. This item can be shipped worldwide.