Application of Hex Joint:
The hex joint connects the drill string to the hammer or cluster hammer body, transmitting rotation and torque through a hexagonal-profile fit rather than a threaded connection alone — standard on larger cluster and DTH hammer setups.
Features of Hex Joint
– Quenched and tempered body with high-frequency pin quenching for wear resistance.
– Case depth of 3mm across the range.
– Sized from 40H up to 350H to match hammer and cluster drilling series.
Specification of Hex Joint
| Type | Body Hardness | Pin Hardness |
| 40H | HS 38–45 | HS 38–45 |
| 80H | HS 35–40 | HS 60–64 |
| 120H | HS 35–40 | HS 60–64 |
| 240H | HS 35–40 | HS 60–64 |
| 350H | HS 35–40 | HS 60–64 |
Note: Confirm hammer/cluster hammer model before ordering the matching joint size.