Mill Liner Sealing
What the Kombo Washer is
The Kombo Washer is an interconnected washer-and-nut assembly that completely seals both the liner bolt hole and the thread, stopping slurry fines migrating up the thread and seizing the nut. A non-stick elastomer with conical rings compresses into the thread and hole, while an all-steel prevailing-torque lock-nut maintains clamp load over the entire reline interval — tight, clean and leak-free, with reduced risk of liner failure.
Australian designed and owned, precision-manufactured in Germany by Flaig + Hommel, and available in metric and imperial sizes. The one-piece design is engineered for 5+ reuses and is future-proofed for robotic installation and removal.
Documented results
KCGM (Kalgoorlie Super Pit): approximately A$483,705 saved per reline on a 756-washer SAG mill, with under 1% attrition and no leaks. Other operations have recorded $500k+ savings per event.
Field use shows 3–4 hours saved on a 750-bolt reline — installation and removal take about 10 seconds each, because the seal won’t stick to the mill surface.
Why choose the Kombo Washer
- Complete seal of bolt hole and thread prevents slurry ingress, nut seizure and corrosion
- Prevailing-torque all-steel lock-nut holds clamp load — won’t back off in operation
- ~10 seconds on, ~10 seconds off — one-piece handling cuts planned reline downtime
- Reusable 5+ relines for multi-year cost savings and less waste
- Seals imperfect holes and uneven mill surfaces, lowering bolt fatigue and breakage risk
- Cleaner, safer decks — a non-leak design keeps work areas dry and low-slip
- Robotic-ready for the next generation of automated relines
Frequently asked questions
What sizes are available?
Metric and imperial sizes to suit standard mill liner bolts — tell us your bolt spec and we’ll match the washer.
How many times can each washer be reused?
The Kombo Washer is engineered for five or more relines. KCGM recorded less than 1% attrition across a full 756-washer SAG mill reline.
Does it work on worn or uneven mill shells?
Yes — the compressing elastomer seals imperfect holes and uneven surfaces, which is where conventional washers typically start leaking.
Ask us about the Kombo Washer →
Related: 2Censor mill liner wear monitoring · Mill backing lining rubber
