Hammer Rebuild and Wear Kits
Pistons, check valves, wear sleeves, backheads, bit retaining rings and seal sets for down-the-hole hammers. Scheduled rebuilds hold penetration rate; run-to-failure does not.
Features
- Penetration rate falls measurably before a hammer fails, so drilled metres per hour is the signal to rebuild.
- Wear sleeve and piston clearances are the items that decide whether a rebuild restores original performance.
- Check valves and foot valves are cheap and frequently the cause of a hammer that will not start.
- Bit retaining rings and chucks are consumables; a worn chuck lets the bit move and destroys the shank.
- Keeping one rebuild kit per hammer on site is what makes a rebuild a scheduled job rather than an unplanned stoppage.
Specifications
| Figure | Typical range | Unit | Why it matters |
|---|---|---|---|
| Kit contents | piston, wear sleeve, check valve, seals | Decides whether a rebuild is complete or partial. |