1.Precision ground to close tolerance
2.Hardened and ground throughout
3.Suitable for all kinds of milling machine spindle taper hole for the R8
4.It used for clamping tools,change the taper hole of spindle,It is easy to use,to enlarge the use range of machine tool

Specifications:
Clamping Diameter: 1/2-inch
Drawbar Thread: 7/16-14UNC
Material: 65Mn Spring Steel
Hardness: HRC 55
Accuracy: 0.0005-inch (0.013mm)
Total Length: 104mm / 4.09-inch
Top Diameter: 32.6mm / 1.28-inch
Bottom Diameter: 24.1mm / 0.95-inch