Splined bushing This RFQ was sourced on www.MFG.com in USA for Deep Hole Drilling Production of a splined bushing from buyer supplied splined 4’ long bars. Approximately 0.406" OD x 0.41" long. Please see drawing for complete dimensions. Buyer Information Industry Aerospace City/Region Oakwood Village, Ohio Country USA RFQ RFQ Number 374218 Material Alloy Steel Material Grade 4140 Alloy Steel Technical Specifications Category Deep Hole Drilling Dimensions The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services and are members of the MFG.com community. For more information visit http://www.mfg.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your quoting experience Deep Hole Drilling: Deep hole drilling involves drilling a deep hole in which the length (or depth) of the hole is three or more time the diameter. The drills used are sometimes called a BTA or ejector drills. Coolants can be fed internally through these drills to the cutting edge.