Bearing Grinding
Bearing grinding places the highest demands on dimensional accuracy, surface quality, and process reliability. With highly hardened bearing steels such as 100Cr6, CBN tools enable stable machining at high cutting speeds.
Process
EHWA CBN grinding tools are engineered specifically for each process – from rough to fine finishing. Defined grit distributions, matched bond systems, and precise tool design achieve tight tolerances and functional surfaces.
Typical applications are external and internal grinding of bearing rings, raceway grinding, and combined processes on cylindrical and non-circular grinding machines.
Separate process: raceway honing. The separate application example shows a tapered-roller bearing inner ring with B2400 K120 VHWPN honing stones, 5 µm stock and a workpiece speed of 100 – 200 rpm. These honing values do not belong to the bore-grinding example below.
What the process gains
Longer dressing intervals
Higher effective tool life, stable cycle times
Consistent surface quality
Reproducible roughness and form values
Reduced thermal load
Lower risk of grinding burn and tempering
Form and dimensional stability
Tight roundness, waviness, and dimensional tolerances
Recommended tools
| Product types | Cylindrical and profile grinding wheels, honing stones |
|---|---|
| Bond | VEWN and VBME – ceramic bonds, VHWPN for honing stones |
| Grit sizes | B76 – B151 |
| Dimensions | Ø up to 650 mm |
| Design | Customer-specific, based on machine, workpiece, and process |
Process example
Bore grinding of bearing rings
The stated dressing ratios refer to the described example. Contact direction, sign and machine convention are confirmed before process design.
| Grinding wheel speed | 30 – 80 m/s |
|---|---|
| Workpiece stock | 0.1 – 1.0 mm / D |
| Total dressing amount | 3 – 30 µm |
| Dressing ratio qd′ | 0.4 – 1.6 down-cut · 0.5 – 1.2 up-cut |
| Dresser | rotating dressing roller |
| Coolant | Oil or emulsion |
Result
- Longer useful grinding-wheel life in the stated bore-grinding example
- Match the wheel, dressing and coolant to the bore and machine
Figures from the described application documents. Tools are engineered around the machine, workpiece and process of the individual case. Example values are not general settings or performance guarantees.