SD4 DTH Hammer Bits, SD4 DTH Drill Bits, SD4 DTH Bits, SD4 DTH Button Bits are name of SD4 Shank button Bit. STAROCKDRILL Made with high quality of 

raw material through special heat treatment, especially, tungsten carbide of tapered button bits are from Boart long year.

In DTH drilling, the rock drilling bit is a continuation of the shank, which the rock drill piston strikes directly. 

Since the piston is in direct contact with the drill bit, little energy is lost. This gives DTH drilling a nearly constant penetration rate regardless of hole length.

DTH Hammer Types coverage: DHD/COP/HD/IR/TD/COPROD/QL/SD/Mission/Numa/Mach/TD/STR etc.

DTH Bit Size range: 2"-32"(76-775mm)

1.High air pressure DTH hammer size from 3" to 12"(76mm-304mm)

2.Connect Thread : API 2 3/8" , API 3 1/2 , Reg-6 5/8"Reg etc.

All our DTH drill bits are also 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. 

STAROCKDRILL Manufacturing higher quality DTH Bits with SD4 shank, which can be designed with customers’ requirements. 

This shank have foot value and without foot value.

Advantages:

1.More stable drilling at work.

2.Avoid some problems which the air compressor is not stable

3.The drilling holes are straightly

4.Easy operation and replaced other brand

How to order:

DTH BITS: BIT SHANK + DIAMETER (NEED FOOT VALUE OR NOT) 

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