R32-40mm-102mm Reaming Bits.

Description

Made from high alloy steel and tungsten carbide as same grade as internationally well-known brand 
Apply "hot (thermal) -insertion" processing procedure to insert the buttons as same as internationally well-known brand Entire CNC processing procedure ensure the quality consistency 
Military grade requirements of heat-treatment guarantee durability 
Fast penetration rates, and streight and clean hole quality. Long life of drilling holes. 

A reaming bit functions to enlarge a borehole and it is designed with a drill portion and a reamer portion. The drill portion is formed by cutting edges at the end of a plurality of flutes, and the reamer portion includes a first relief formed on each flute surface disposed at a predetermined angle with respect to the flute surface to form a first reamer cutting edge. A second relief is formed contiguous with the first face on each reamer portion and is disposed at a second angle, less than the first angle with respect to the flute surface

Specifications
Thread type: R32 
diameter: 89mm/102mm/127mm 
Button type: Spherical/parabolic 
belongs to rock drilling tools parts 
Taper Reaming Bits Diameter:64mm-102mm 
Normal taper:6degree, 12degree 
Thread Reaming Bits Diameter:89mm-152mm 
Normal thread:R25, R28, R32, T38 
Type:Pilot, Integral 
Two types of reaming bits: button bit reamers and pilot