Product Description
The GT60 thread button family references 89 and 102 mm gauges for hydraulic tunnel drills and large mining rounds. At approximately 3.50 and 4.02 inches, these diameters suit mechanized equipment with the impact capacity and rod system required by GT60 tooling. Review the work in the construction drilling application archive and compare the interval with the hard formation archive. The family is not intended for unsupported soil, and GT60 alone does not confirm the face geometry.
The source names a GT60 hydraulic thread, an 89 button-bit reference, and a 102 ball-tooth reference. This record treats them as two size variants within one threaded alloy-steel family with fixed carbide buttons. It does not assume that the 89 and 102 mm faces use the same insert count, profile, skirt, or flushing arrangement. GT60 connection details must still match the rod and shank adapter drawings. Confirm the exact model, gauge, button distribution, and porting before moving either variant into a drill plan.
Use 1,000–3,000 lbf/in of diameter and 25–60 RPM, calculating total load separately for 89 and 102 mm. Hard and abrasive formations are appropriate; larger faces require effective removal to avoid recutting and peripheral wear. Track return velocity and gauge wear separately for the two listed diameters. Flow is blank because rod bore, port area, hole depth, and flushing medium are unverified. The explicit limitation is that only two gauges and one thread family are known, not a complete face specification. Drilling-system information can be reviewed through the IADC.
