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Monitoring jaw plate wear and planning rotations
Track wear by measuring the jaw plate thickness at the centre and ends, logging this after each shift during high-wear campaigns. If your jaw shows uneven wear, inspect feed alignment and check for fines building up behind the liner. For heavy feed or high silica, it’s often best to rotate the jaw plates end-for-end before the leading edge wears too thin. Keep your change-window checklist handy: waiting too long risks cracking and cheek washout, especially with hard Highveld rock.
- Measure thickness at 3 points
- Inspect for uneven wear
- Rotate plates before edge thins
Change-Out criteria and holding stock
Change out jaw plates when the leading edge reaches minimum safe thickness, as per OEM guidance. Watch for signs like excessive cracking, bolt movement or change in nip angle. Plan your campaign so you have at least one replacement set in stock, especially ahead of Eskom power cuts or long weekends. Storing liners dry and off the ground prevents corrosion, especially on the coast. Make sure new cheek plates and toggle plates are also on hand, since wear on these can accelerate jaw seat damage.
- Follow OEM minimum thickness
- Stock at least one spare set
- Check cheek and toggle wear
Avoiding common jaw plate failures
Early cracking often results from mis-seated plates, over-tightened bolts or running with incorrect CSS settings. Poor feed distribution can cause one end to wear faster, while fines packing behind the liner encourage seat movement and fretting. Always check for loose bolts and inspect the seat area every week. If the toggle plate breaks, inspect both the jaw and toggle seat closely before restarting. When in doubt, refer to your OEM manual or contact Crusher Consumables for region-specific advice.
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