Product Description
The 32–42 mm one-way carbide drag bit covers 1.26–1.65 in faces for tunnel and mining holes in soft or uncemented material. Its one-way profile concentrates cutting on a fixed hard-alloy edge and is intended for simple pneumatic drilling where the ground does not demand a percussion-button structure. Relevant uses appear in the mining exploration archive; compatible loose ground is summarized in the unconsolidated formation archive.
The media filename identifies a carbide-tipped, thickened hard-alloy head and mentions both 32 mm and 42 mm versions. The cutting element is fixed, with no cone, bearing, or PDC layer. Inspect the leading edge for straightness, carbide support, and gauge before attaching it to the drill. The connection type is not stated, so confirm the shank geometry rather than treating the diameter range as a rod specification. Mark the selected face size on the job record and inspect the trailing support surface, because deformation behind the leading edge can alter direction even when the carbide itself remains attached.
Apply low WOB and keep rotation within 100–250 RPM. Use the lower response when the bit begins to chatter, catch, or produce irregular torque. No numerical water or air-flow figure is provided for this drag family. The one-way edge is limited in hard or abrasive formations and should not be used for granite, basalt, or quartzite. The U.S. Geological Survey offers lithology references. If competent rock controls the interval, a button bit should replace this fixed profile. Keep a short trial record before extending the run.