Bolt Cold Heading Parts

It is processed by STAR dual-spindle CNC centering machine, the cylindrical cutter with 55°R0.2 corner is used for finishing the end face, processing the outer diameter, the 90°tungsten steel center drill is used for centering, the tungsten steel bit is used for drilling, then use the rotary punch to process the inner hexagon,then remove the burr in the hole with a tungsten-carbide bit, and then use the R0.4 corner turning tool to rough the outer diameter of the thread, for the secondary shaft, use a cylindrical cutter with 55°R0.2 corner to process the outer diameter of the thread, finish the end face, and then use a thread cutter to process the thread, and then use a cylindrical cutter with 55°R0.2 corner to remove the thread burr, and then use a thread cutter to remove the thread burr.
Specializing In The Production Of Stainless Steel Contour Screws, End Cross, Plum And Hex Can Be Produced. Hexagon Socket Screws Are Often Used In Machinery, And Have The Advantages Of Easy Fastening, Disassembly, And Not Easy To Slip Corners. The Allen Key Is Generally A 90 ° Turn. One End Of The Bend Is Long And The Other End Is Short. When Screwing With The Short Side, Holding The Long Side Can Save A Lot Of Force And Tighten The Screw Better. The Long End Has A Round Head (hexagon Cylinder Is Similar To A Ball) And A Flat Head. The Round Head Can Be Easily Inserted Into The Screw Hole For Easy Removal. The Manufacturing Cost Of The Outer Hexagon Is Much Lower Than That Of The Inner Hexagon. Its Advantage Is That The Screw Head (the Stress Position Of The Wrench) Is Thinner Than The Inner Hexagon, And Some Places Can Not Be Replaced By The Inner Hexagon. In Addition, The Inner Hexagon Screws Used By Machines With Low Cost, Low Power Strength And Low Accuracy Requirements Are Much Less Than The Outer Hexagon.