Product Description
The 28 mm cold-pressed ball-tooth bit is a small-gauge tool for light mining, anchor preparation, and construction holes in competent rock. Its 1.10-inch diameter suits compact equipment when the rod, impact level, and desired hole size agree. Evaluate the intended use through the construction drilling application archive and the expected material through the medium formation archive. It is not intended for cutting steel reinforcement, recovering core, or holding open unstable overburden.
The filename states a cold-pressed tungsten-carbide ball-tooth structure at 28 mm. This supports an alloy-steel body with fixed carbide contacts, but it does not supply insert count, button diameter, face profile, connection, or flushing arrangement. Cold pressing is a construction descriptor rather than proof of a particular retention force or service life. The small bit may use a tapered or other compact interface, yet no connection should be inferred from size. Confirm the mating rod, seating depth, and port path from a drawing or sample before use.
Apply 1,000–3,000 lbf/in of diameter and 25–60 RPM, recognizing that the 1.10-inch gauge requires less total load than a large threaded bit. Medium and hard rock are suitable planning classes; abrasive conditions increase the importance of insert and gauge inspection. Log collaring response and returned chip size before raising the impact setting. Flushing must be determined from the available drill and hole depth, so the flow field remains blank. The explicit limitation is missing connection and face-layout data. Rock-mechanics background can be reviewed through the ScienceDirect engineering reference.
