Head structure and tooth shape
Features of down-the-hole drill bits
1、High-quality forging technology improves the fatigue strength of drill trousers;
2、Use high-quality hard alloy and size to ensure the stability of the life of the drill bit alloy;
3、Excellent inserting technology ensures that the alloy teeth will not lose teeth during the normal use
of the drill;
4、Advanced heat treatment equipment and technology to ensure the stability of drill trouser body
performance;
5、For drill bits of different rock formations, special tooth surface design, structural design and specific
Processing technology are used to ensure the life of the drill bit.
Model | JS4M | JS5M | JS6M | JS8M |
L | 228 | 260 | 231 | 329 |
Φ | 68 | 82.5 | 106.5 | 128.5 |
Number of splines | 12 | 12 | 12 | 12 |
Standard range | 105-130 | 135-165 | 155-203 | 203-254 |
Common drill bits | 115 | 140 | 165、178 | 203、216、240 |
Corresponding model | MISSI on 40 | MISSI on 50 | MISSI on 60 | MISSI on 80 |
modelo | JS3.5D | JS4H | JS5H | JS6H | JS8H | JS10N |
L | 181 | 209 | 260 | 308 | 350 | 375 |
Φ | 54.6 | 65 | 84 | 101.5 | 128.5 | 165 |
Number of splines | 8 | 8 | 8 | 8 | 10 | 10 |
Standard range | 90-110 | 105-130 | 135-152 | 155-190 | 203-254 | 245-305 |
Common drill bits | 105 | 115 | 140 | 165、178 | 203、216、 240 | 254、305 |
Corresponding model | DHD3.5 | DHD340 | DHD350 | DHD360 | DHD380 | NUMA100 |