White (WA or 9A) r Pink (RAA) or a combination of White or Pink abrasive (9RA). The most friable aluminum oxide grains generally work best on steels and steel alloys.
Silicon Carbide (C, BC, GC) abrasive for aluminum, titanium, and non-ferous materials and non-metallic.
Use fine pore induced porosity.
Select grain size according to required form, corners, radii, and finish requirements.
Select grade and hardness based on material to be ground. C to G grades are most popular with H and I grades being used on easier to grind materials or narrow cross sections. C, D and E grades are preferred for long continuous parts.
Caution should be used in selecting ceramic grain wheels since the ceramic grain can rapidly destroy the expensive diamond dressing rolls.
Note: Please contact Radiac Abrasives application engineer for complete recommendation
| Problem | Cause | Correction |
|---|---|---|
| Bounce, chatter and ripple | Coolant film boiling | Check delivery and quantity of coolant |
| Too large a depth of cut | Reduce cut | |
| Instability | Check rigidity of set up | |
| Dressing amount set too low | Increase | |
| Dreser to wheel speed ratio too low | Increase ratio | |
| Burning, burnishing, cracking | Lack of coolant | Check delivery pressure and nozzle positions |
| Coolant mixture out of specifications | Check dilution | |
| Hard wheel specification | Reduce surface speed of wheel | |
| Coolant deterioration | Replace | |
| Wrong feeds and speeds | Adjust to suit wheel grade | |
| Dressing amount set too low | Increase | |
| Dresser to wheelspeed ration too low | Increase ratio | |
| Excessive power being drawn and wheel stall | Infeed high | Reduce infeed |
| Work speed high | Reduce work speed | |
| Dressing rate too low | Increase dressing rate | |
| Loss of Form | Coolant film boiling | Increase dressing rate or reducetable feed |
| Work speed too high | Reduce work speed or increase wheel | |
| Surface pick up | Slow wheel speed | Increase surface speed |
| Excessive dressing | Reduce dressing rate | |
| Coolant deterioration | Replace coolant | |
| Coolant application | Check dressing/grinding nozzle |
