NUMA240 DTH HAMMER BUTTON BITS also called N240 DTH Hammer Bits, N240 DTH Drill Bits, application on construction building and piling, 

Only have 3-5 companies can be manufacturing this bigger sizes hammers and bits.

With learning experience from NUMA brochure, we are improving the raw quality and adding some more heat treatment on the bit body, 

choosing the tungsten carbide is also with T6 buttons.

All our DTH drill bits are CAD designed, CNC manufactured for perfect bits body, and multiple heat-treated to enhance hardness, 

surface-compressed for fatigue resistance, all thus to extend the product life for maximum wear and performance in the toughest of drilling conditions. 

Moreover, all these bits are also made from high quality alloy steels and fitted with premium quality tungsten carbide tips for superior penetration rate.

STAROCKDRILL commonly has three basic bits head designs: Flat Face, Convex and Concave. These are designed for specific applications for all rock types, 

hardness’s and conditions.

Advantages

1.Faster drilling

2.Save lubrication oil

3.Longer working life

4.Stable drilling speed

5.Replaced Original hammers and bits

6.Completely after sales service

How to order:

DTH BITS: BIT SHANK + DIAMETER 

(We are customizing customer on bit face and button shape)