CBN Double-Face Grinding Wheel – Bearing Grinding
Segmented double-face grinding wheels for simultaneous, two-sided grinding of bearing components.
In face and double-face grinding of bearing components, parallelism, flatness, and surface quality are the central concerns. Inner and outer rings as well as rolling elements are machined on both sides to reliably maintain tight tolerances at high volumes. Simultaneous grinding of both end faces reduces non-productive time and minimizes re-clamping errors.
Double-face grinding wheels are designed for series and high-volume production. A matched combination of grain type, bond, and pore structure ensures stable material removal with controlled heat generation. Segmented designs support coolant supply and provide consistent cutting ability over defined dressing intervals.
EHWA wheels are used for face grinding of inner and outer rings of rolling bearings, cylindrical rollers, tapered rollers, and needles, on vertical and horizontal double-disc grinding machines.
Product program
- Product types: double-face grinding wheels in segmented design for vertical and horizontal machine concepts
- Abrasive: CBN (for hardened bearing steels, e.g. 100Cr6), diamond (for carbide or ceramic components)
- Bonds: VE – ceramic bond for high form stability and thermal safety; ME – metal bond for high profile retention and long tool life
- Grit sizes: B64 – B181 (process-dependent)
- Dimensions: outer diameter up to 900 mm, segment widths and count machine- and process-specific
Process and benefits
- Longer dressing intervals – higher machine availability and reduced non-productive time
- High parallelism and flatness accuracy – reproducible dimensional accuracy of both end faces over the entire tool life
- Reduced thermal load – minimized risk of grinding burn and microstructural impact on hardened bearing steels
Application example
VEWN | EHWA ceramic bond – double-face grinding of inner and outer rings (100Cr6, hardened 60–62 HRC) in series production.
| Workpiece | Bearing ring Ø 72 mm, width 20 mm |
|---|---|
| Grinding wheel diameter | 760 mm (segmented) |
| Peripheral speed | 63 m/s |
| Feed rate | 0.4 – 0.6 mm/s |
| Infeed | 0.15 – 0.25 mm per side |
| Specification | CBN B126 VEWN (ceramic bond, open-pore structure) |
CBN double-face grinding wheel tool life increased by up to 30 % compared to conventional ceramic CBN bond. Dressing interval extended (non-productive time reduced by approx. 20 %), constant flatness < 2 µm, reduced heat input with no grinding burn.