6-60MM Spiral Step Drill Bit Conduit Installation HSS 13 steps Industrial Reamer power tools

Features

100% High quality and Brand new.

HSS 4241 suitable for use in hardness 25 degree below the workpiece , such as iron , steel , PV panels , insulation boards.

A unique ladder structure, a variety of standard size drill bit can open the aperture , a box arrived on the ladder drill bit.

Without using a center punch , compared with ordinary twist easily broken. Construction site , a step drill specifications apply.

Deburring , chamfering, open oval hole expansion, twist function which can not be completed as possible.

Compared with ordinary twist . Shaking small , no use leading center aperture punch out can carve out beautiful .

The use of tools: pistol drill, bench drill .When the cooling water side while working,can effectively extend the service life of the drill bit , drilling speed recommended 250 – 400 rpm .

New materials, new processes, new products popular,

Note:we must choose 6542/M2 fight stainless steel, if the choice of material a hole 4241,drill it was destroyed . Workpiece thickness of 5 mm or less.

Specification

Material : HSS 4241

Finish: White Diamond

Size :6-60mm (6,10,15,20,25,30,35,40,45,50,55,60 mm)

13mm shank

Package Includes

1 x HSS 4241 6-60mm step drillsingle loaded plastic