Quick Tips

If you grind hard material choose a softer grade.
If you grind soft material choose a harder grade.
If you are unsure about optimal hardness, start with a softer quality and move step by step towards harder qualities.
If quality appears soft, increase RPM.
If quality appears hard, decrease RPM.

Q & A

Problem→

Cause→

Solution

Blue discoloration of metal, clogging of wheel, low material removal

Too hard bond

Choose softer bond

Too dense (not enough chip space)

Choose more open/porous structure

Excessive heavy feed

Reduce feed

Grain is too fine for the workpiece material

Choose coarser grit

Too high RPM considering wheel quality and workpiece material

Reduce RPM

Problem→

Cause→

Solution

Fast wear of wheel

Too soft bond

Choose harder bond

Too open structure

Choose denser structure

Too low RPM considering wheel quality and workpiece material

Increase RPM