Positive Rake For “Coal Ribs”

Drilling – Bits

Product Code Prefix RB

Product Code Guide

Bit Type	Drill Diameter	Shank Size	Flush Style
RB	27	16	XF

Thread Shank Size	Drill Bit Diameter (mm)	Tungsten Carbide Grade
1/2" Whiteworth	26	Standard
1/2" Whiteworth	27	Standard
1/2" Whiteworth	28	Standard
16mm	27	Standard

Key Features

Rib drilling, eccentric tip and positive rake.
Fast penetrating two wing drill bit for wet drilling specifically designed for softer conditions as found in most coal mine "ribs".
The positive front rake and eccentric tips assist in penetration with hand held and low thrust drilling machines.
The standard grade of tungsten carbide insert provides extremely good wear resistance and is time proven for all types of conditions. Unless otherwise specified, the standard grade of carbide is assumed.
These drill bits have a central water hole plus two side water grooves for extra flushing. The drill bit body is specifically designed for clearance of rock cuttings.
The drill bit body is made of high tensile material for strength and abrasion resistance.

Packaging

Supplied in plastic pails containing 50 drill bits.

Published: September 2011
All dimensions, weights, quantities and specifications are those applicable at the time of publication and may be amended from time to time.

Notes

Only DSI Underground rock bolt components should be used to enable the optimum performance of the bolt system to be obtained.
DSI Underground Mining Products Division is Quality Assured to ISO 9001:2015, Registration QMS 41328.