Product Description
The 38 mm four-tooth ballistic button bit is suited to compact mining rounds, quarry trimming, and construction holes in rock that can sustain concentrated impact. Four prominent contacts make the face easy to identify and provide a direct option where a small-diameter tool is required. Review the job under the construction drilling application archive and compare the expected lithology with the hard formation archive. This bit is not intended to control unstable soil or unconsolidated gravel.
The source description specifies four teeth and a ballistic button form. That geometry concentrates loading at the rounded-to-tapered carbide tips while the steel body carries impact and torque from the drilling system. The filename does not identify a thread, taper angle, skirt style, or flushing-port arrangement, so those details remain open engineering checks. A 38 mm gauge alone cannot establish rod compatibility. Before ordering, verify the shank profile, face pattern, button projection, and whether the available flushing route matches the drill and hole-cleaning method.
Operate inside 1,000–3,000 lbf/in of diameter WOB and 25–60 RPM. Begin near the lower end when collaring, fractured rock, or uneven seating could load one tooth more heavily than the others. Hard and abrasive formations call for regular checks of tip chipping and gauge loss; medium rock may permit steadier advance with less shock. Flow is deliberately blank because the source provides no compressor or liquid-flushing requirement. The main limitation is the unverified connection, not the stated diameter or tooth count. Rock-drilling terminology can be cross-checked through the ScienceDirect rock-mechanics topics.
