Seat / bore grinding with EHWA CBN grinding pins

Injection valves in combustion engines transport the fuel into the combustion chamber under high pressure. Due to the “downsizing” of engines, injection valves nowadays have to withstand very high pressures and work with meticulous precision.

Seat grinding and bore grinding are common manufacturing processes for injection components. The challenge with these grinding applications is the very small tool dimensions, which must nevertheless enable high-precision and economical grinding.

EHWA CBN-Schleifstifte für Bohrungsschleifen

VBTM | EHWA vitrified bond

Dimensions for standard grinding pins:

EHWA grinding pin Bore and seat grinding
Cooling hole 0,5 – 1,0 mm
Slot widths 0,4 – 1,0 mm
Grinding pin diameter 1,5 – 20 mm
CBN grit sizes 29 – 76 µm

Grinding wheel with slots for coolant supply:

Schleifkörper mit Schlitzen zur Kühlmittelzuführung

Advantages of EHWA CBN grinding wheels:

  • Use of free-cutting grits.

  • Expansion of the Dressing interval => Optimum use of the abrasive layer.

  • Consistent grinding performance through modified and homogeneous bonding.

  • highly precise wheel shape possible.

  • on request with Cooling holes and Cooling slots.