Doersupp 4-22mm Step Drill Bit | HSS Titanium Coated Hex Shank Hole Cutter

Product Description

Description:
Doersupp 4-22mm Hex Shank Step Cone Drill Bit HSS Titanium Coated Hole Cutter
Specification:

Material	High speed steel 4241
Size	4-22 mm (10 Setps: 6,8,10,12,14,16,18,20 22mm)
Shank	6mm(dia),25mm(L)
Total	75mm(L)

Features:
The ladder of its unique structure, a bit can open a variety of specifications of aperture. Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken. Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,but it is possible. The use of tools: drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit, recommend drilling rate of 250-250 RPM. Package Included:
1 x Step Drill
More Details: