Shaft This RFQ was sourced on www.MFG.com in USA for Internal Gears Part is semi-finished shaft 1-3/4 dia. x 8.o" long. Requires an internal spline 1-1/8 in. deep as shown in attached drawings. Buyer Information Industry Government Military City/Region Slidell, Louisiana Country USA RFQ RFQ Number 329547 Material Material Grade 4140/4340 steel @ 28/30 rc Technical Specifications Category Internal Gears Dimensions The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services for the machine tool industry, automotive industry… For more information visit www.MFG.com. MFG.com analyzes all engineered parts and RFQs for improved manufacturability and to ensure quality and a quick quoting experience. Internal Gears: Internal gears have teeth cut on the inside diameter of the gear and are mated with straight or spur gear shafts. Planetary gears are an arrangement of gears moving around an internal gear, like planets in a solar system.