Product Description
The 165 mm Mission60 DTH bit is intended for hard-rock water wells and mining holes where a Mission60 hammer family is already specified. Its 6.50-inch gauge supports a substantial bore while down-the-hole impact concentrates energy close to the face. Check the project through the water well drilling application archive and classify the interval with the hard formation archive. It is not a solution for keeping unconsolidated overburden open; casing and bore support remain separate design requirements.
The source confirms Mission60, 165 mm, and a DTH application but does not state button count, face profile, spline dimensions, valve arrangement, or port area. The record therefore uses an alloy-steel Mission60-family body with fixed carbide buttons and avoids assigning unverified facial geometry. The word “new” identifies condition rather than a revised engineering generation. Before use, compare the current hammer and bit drawings, verify the retaining parts and foot-valve requirement, and confirm that the measured gauge is compatible with the planned casing and annulus.
Use 1,000–3,000 lbf/in of diameter, 25–60 RPM, and hammer-approved air within the referenced 0.7–2.4 MPa DTH range. Hard and abrasive rock fit the mechanism, while broken contacts may require lower loading and closer return observation. Confirm the planned annular clearance before drilling so cuttings can return without excessive recirculation. Flow remains blank because pressure does not define compressor volume at the working depth. The limitation is incomplete Mission60 dimensional and pneumatic data. Water-well planning resources can be reviewed through the National Ground Water Association. Retain the dull for comparison.
