This down-the-hole concave face drill bit runs on DTH hammers with DHD35 or MD35 shank interfaces, in face diameters of 3-1/2, 3-5/8, 3-3/4 and 3-7/8 in. Instead of a flat face, the cutting structure sits in a recessed, dish-shaped depression that centers the bit in the hole and reduces deviation in medium-hard to hard, homogeneous rock.
The hammer piston strikes the bit directly, and the concave geometry pairs that efficiency with strong flushing air sweeps the recessed face and carries cuttings away through dedicated holes and grooves. Choose ballistic carbide buttons for penetration speed or dome buttons for harder, more abrasive ground, keep a bit retaining spacer on hand for the hammer, and see the full DTH drill bit range or the DTH hammer buyers guide for matching bit to down-the-hole hammer.
- Shank interfaces: DHD35 and MD35 to match your DTH hammer
- Face diameters: 3-1/2, 3-5/8, 3-3/4 and 3-7/8 in.
- Concave face centers the bit and reduces hole deviation for straighter holes
- Ballistic carbide buttons for faster penetration; dome buttons for hard, abrasive rock
- Flushing holes and face grooves clear cuttings and keep the bit cool
- Heat-treated alloy steel body with gauge buttons to hold hole diameter
- Applications: mining, quarrying, water well, geothermal and foundation drilling
- Stocked by Crowder Supply in Denver
