Grinding wheel too hard for particular work.
Use a coarser grained wheel with more open bond to allow greater chip clearance. Increase coolant flow.

Scale from hardened work, or dirty (oil, solder, welding flux, etc.)
Clean work before grinding. Dress wheel more often.

Incorrect dressing of grinding wheel
Turn diamond or replace with new one. Increase rate when dressing.

Stock removal too fast.
Check set-up. Take lighter cuts or infeed at slower rate. Increase regulating wheel (work speed) to make wheel act softer.

Coolant incorrect or dirty.
Change coolant. If using soluble oil, use thinner coolant, add soda, or if necessary filter coolant.

Incorrect wheel for particular job.
Consult your grinding wheel manufacturer’s representative for specific particulars.

Scale from hardened work dulls wheel grains.
Clean work before grinding. Dress wheel more often.

Incorrect dressing of grinding wheel
Turn diamond to avoid fiat spot or replace with new one. Increase penetration of dressing diamond up to 0.001". Check slides on truing attachment; they may be worn low in centre. Truing attachment gibs may be loose enough to allow diamond to back off instead of cutting.

Stock removal too slow when in feed grinding.
Increase in feed rate.

Coolant incorrect or dirty.
Change coolant. Decrease concentration of soluble oil. Increase flow of coolant. Clean coolant tank and machine.

Coolant gummy.
Change coolant. If water hard, treat with a water softener before mixing with oil. Increase soda or decrease oil content of coolant when using soluble oil.

Wheel acts too hard indicated by:

1. Loss of cutting action.
2. Wheel loading.
3. Work discoloured, burned
4. Work chattering.
5. Increase work speed (regulating wheel) and pressure.
6. Dress with sharp diamond at increased traverse rate.
7. Use thinner coolant; avoid gummy coolants. Increase work speed; use softer wheel.
8. Use coarser grain size and softer grade.

Wheel acts too soft indicated by:

1. Short wheel life.
2. Wheel markings on work.
3. Not holding cut.
4. Decrease work speed (regulating wheel). Wheel too soft.
5. Slow down traverse and work speeds, also work pressure.
6. Dress wheel with slow traverse and light penetration. Take lighter cuts when grinding. Wheel too soft.

Radial Break, 3 or More Pieces.

1. Flanges pulled up unevenly causing side strains on wheel.
2. Wheel overheated.
3. Flange screw loose.
4. Work jammed into wheel causing excessive pressure.
5. Use only standard paper or blotting paper gaskets. Be sure gaskets and flanges are clean. Pull up evenly on alternate bolts before cinching up.
6. Use plenty of coolant for dressing and grinding. Do not force or jam work into wheel.
7. Keep flange screws tight at all times.
8. Prevent work jamming into wheel.

Irregular Break.

1. Faulty wheel.
2. Wheel dropped or subject to hard blow.
3. Work jammed into wheel.
4. Wheel forced on collet when mounting.
5. Suspend wheel and tap lightly before mounting. If result is not a clear ping do not use wheel.
6. Do not handle heavy wheels except with special lifting device. Do not subject wheels to hard blows.
7. Prevent work jamming into wheel. Make certain none of the pieces are oversize, particularly on in feed.
8. Wheel should be just a nice sliding fit (Maximum clearance of 0.003" on diameter) on collet and must be put on squarely. Have collet on bench. Start wheel on collet and tap lightly all around with a small piece of wood - do not let wheel drop on collet