Product Description
This multi-tooth carbide button family is described for separate T38 and R38 threaded mining systems in rock drilling and excavation. Both names occupy a nominal 38 mm, or roughly 1.50-inch, thread class, but they use different profiles and require distinct rods. Define the use through the mining and exploration application archive and assess the material through the medium formation archive. The product name does not supply the hole diameter and should not be used as a gauge specification.
The source states impact and wear resistance, a multi-tooth carbide face, and T38-R38 threaded construction. An alloy-steel threaded body with fixed carbide contacts is documented conservatively, without turning performance adjectives into guaranteed life. The exact number and shape of buttons, face recess, skirt, hole gauge, and flushing layout are not identified. A selected model must be verified as either T38 or R38, never both, and its thread shoulder and gauge must be checked against the active drill string.
Use 1,000–3,000 lbf/in of actual diameter and 25–60 RPM after a model drawing provides the missing hole gauge. Medium, hard, and abrasive rock can suit the button mechanism, but quartz-rich or fractured intervals need closer inspection of gauge and thread condition. Document both the selected thread and measured gauge on every run sheet before comparing performance between bits. Flow is blank because thread naming does not establish rod bore or port area. The stated limitation is absent gauge and face data. Rock-property terminology can be reviewed through the ScienceDirect rock-mechanics reference.