Long shank twist drill bits 1. professional manufacturer 2. high resistance 3. fast delivery 4. best service
Long shank twist drill bits
About Us
We are a professional manufacturer specialized in series of drill tools: PDC, PDC drill bits, diamond drill bits, etc. We can also produce other products according to the customers requirements. We sincerely welcome our friend both home and abroad to come for business talks.
About Products
Coal bits are mainly used in coal and mine drilling, have dry-type & wet-type.
Dimension: 25, 27, 28, 29, 30, 32, 36, 42 mm.Normal Thread Model: M16*2; M14*1.5, M12*1.75; M14*1.5; M12*1.75
Specifications of twin wing coal bits
| Colliery Drill Tools | Main Standard(mm) | |||
| D | H | L | M | |
| Thread joint | 27 | 44 | 17 | M14×1.5 |
| 27 | 54 | 17 | M12×1.75 | |
| 28 | 54 | 20 | M12×1.75 | |
| 29 | 52 | 18 | M14×1.5 | |
| 30 | 50 | 18 | M14×1.5 | |
| 32 | 52 | 22 | M14×1.5 | |
| 32 | 56 | 22 | M12×1.75 | |
Our products advantage
A. Selected higher quality diamond powder, improved the sintering technique, enhanced the bond combination strength between diamond grain
B.Improved the inner structure of the sintered cavity, the pressure and temperature become more balance, which ensure the cutter has more stable performance
C.Adopted a new type of carbide, which improved the weld strength
D.Optimized the designation of joint face, which reduced the residual stress
Welcome you contact us for more detailed information.
Long shank twist drill bits
