TAPERED DRILL STEEL 

EQUIPMENT

Durable tapered socket bits are 
available from 30mm (1 3/16") to 
43mm (1 11/16") in diameters 
with your choice of 6°, 7°, 
11°, or 12° taper.
Button bits and Cross 
Bits both are made 
for Tapered 
Sockets.

DOWN THE HOLE BIT

Mitsubishi materials produces a 
wide assortment of Down The 
Hole bits.
These  range from 90mm (3 1/2") 
to 254mm(10") in diameter and fit 
many hammers such as Sandvik, 
Atlas Copco etc.
For the most effective operation in 
various drilling conditions, we offer 
Flat Face, Concave and Convex 
head designs.

SUPER MAXBIT

The SUPER MAXBIT consists of two or three wings on 
a device. Bit wings become extendable / retractable 
when drill strings rotate in the forward /reverse direction.
While drilling with extended bit wings, the SUPER 
MAXBIT, with quite same rotation moment on each wing, 
is completely balanced and stable , compared with 
former eccentric drilling method.

ULTRA MAXBIT

The ULTRA MAXBIT is used for simultaneous drilling 
and casing in unstable soft ground formations, and is 
also applicable for wide range of ground conditions 
such as sand, gravel and boulders and rock.

REAMING EQUIPMENT

Pilot Adaptors and Reaming Bits with 
popular threads are made for many 
different drilling conditions.

MITSUBISHI MATERIALS CORPORATION

 has been developing percussion rock drilling tools for 

over 60 years in Japan. Mitsubishi materials is truly a worldwide player and is offering high quality products to 
the global market. Currently We are supplying over 50 countries and continues to increase the number of sales 
districts.
Mitsubishi Rock Tools products are manufactured from highly wear resistant steel and our own in house 
Japanese produced tungsten carbide inserts. 
These tungsten carbide inserts are designed and produced by experienced engineers using the most advanced 
computer technology. Using this new computer technology, these tungsten carbide inserts are combined with the 
special steel bodies developed by Mitsubishi materials to provide the client with unbeatable consistent quality. 
What is more,each bit body is marked with a manufacturing lot number that allows precise tracking and control 
through the full history of the manufacturing process of tungsten carbide inserts and steel bodies.
Mitsubishi materials has been a leader in helping to achieve remarkable technological innovations that have 
propelled the mining, construction and quarry industries to the highest drilling efficiencies.