STR40 DTH Bits is STAROCKDRILL design shank bits which only match with STR40 Shank DTH Hammer. 

Different drilling ground choose different bit face and buttons shapes. Mostly liking as belowing:

Bit Head Design and selection:

1. Flat front Spherical

   Application: For Drilling in hard and abrasive rock.

2. Flat front Spherical + Ballistic

   Application: For Drilling in medium-hard to hard and moderatedly abrasive rock.

3. Convex front Spherical + Ballistice

   Application: For drilling in medium-hard and moderately abrasive rock.

4. Convex front Ballistic 

   Application: For drilling at high penetration rates in non abrasive rock.

5. Concave front Spherical 

   Application: For drilling in medium-hard, minimum hole deviation control.

Features:

A.Cost saving. Which can be drilled 1-2 more holes than others

B.Fuel saving. Higher air pressure held under same air supplied. Less air consumption.

C.Air pressure holding. Constant air maintained during entire drilling life

Longevity. Generally 4000-15000 meters depending on soft or hard ground

Advantages:

1.We are design the special shank on hammers and bits which is faster than other brands hammers and bits in the world

2.Let the distributors can be protect theirs customers group

3.Faster drilling and save lubrication oils which the user can be saved more time and money

4.Completely after sales service, can be solved problems within 24 hours.

5.Special heat treatment which let the bit and hammers working longer hours

After testing quality, you will like our hammers . Especially on water well drilling and mining.

How to order:

DTH BITS: BIT SHANK + DIAMETER 

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