Sintered slab is dense, brittle and expensive. A chipped edge on a 1600 × 3200 mm slab is not a repair, it is a write-off. Chipping has a short list of causes and most of them are not the wheel.
Glazing first
When a wheel stops exposing fresh diamond it stops cutting and starts rubbing. Friction heat rises, the slab edge micro-fractures, and the operator sees chips. The wheel looks fine. It is glazed. The fix is usually a softer bond or more coolant, not a new machine setting.
Then concentricity
A wheel that does not run true hits the edge intermittently, and every hit is an impact on a brittle material. Our chamfering wheels are one-piece moulded so concentricity is held by the mould rather than corrected afterwards.
Then vibration
Chatter shows up as a periodic wave along the edge. Steel-plastic composite bodies damp it, which is why the JYP-S60 specification exists. Operators usually hear it before they see it.
Check these before changing tooling
- Coolant flow rate at the wheel, not at the pump.
- Flange condition, and whether the wheel is seated flat.
- Feed speed against the wheel’s designed stock removal.
- Whether the slab is supported along its full length at the point of contact.
If all four are right and the edge still chips, the bond is wrong for your material. A photo of the chip pattern is usually enough for us to tell you which way to move.