China supplier R25 R38 T38 T45 T51 GT60 retrac thread rock button drill bits. Can customize to design bit diameter,air hole quantity as well as bit head shape.Alloy button shape can be changed according to requirement. | Bit Dia.(mm) | Thread Connection | Qty*Button Dia(mm)Gauge | Qty*Button Dia(mm)Front | Air Holes Front | Air Holes Side | Weight(kg) |
| 43 | R28 | 5X10 | 2X9 | 1 | 3 | 0.9 |
| 51 | R32 | 6X10 | 3X9 | 3 | - | 1.0 |
| 76 | R32/R38/T38 | 7X10 | 4X10 | 1 | 2 | 2.6 |
| 89 | T38/T45/T51 | 8X12 | 4X12+2X10 | 4 | 2 | 4.3 |
| 102 | R32/T38/T45 | 8X14 | 6X12 | 2 | 2 | 5.6 |
| 110 | T45/T51 | 7X14 | 5X13 | 3 | - | 5.8 |
| 115 | T45/T51 | 7X14 | 6X14 | 4 | - | 6.0 |
| 127 | T45/T51/GT60 | 8X14 | 7X13 | 2 | 1 | 6.5 |
| 140 | T51/GT60 | 8X16 | 7X14 | 2 | 1 | 8.9 |
| 152 | T51/GT60 | 8X16 | 8X14 | 2 | 1 | 10.0 |
