Cylinder block / connecting rod honing with EHWA honing stones

The cylinder block is a component of the combustion engine. The tasks of a cylinder block are manifold: crankshaft bearing, transmission of mechanical forces, fastening connections to the vehicle, etc. The engine block is usually made of cast iron, although light metals are also used in some engines.

Particularly high demands are placed on the surface quality of the connecting surface to the cylinder head of cylinder blocks. This must be flawless and absolutely tight. EHWA has been supplying metal-bonded honing tools for machining engine blocks to the highest precision standards for many years.

The connecting rod is the connecting piece between the crankshaft and the piston. Nowadays, connecting rods are made from alloyed steel grades or sintered metals. Titanium is also used for special applications.

EHWA Honsteine Pleuelstange-Honen

MB, MS, MJ | EHWA metal bond | cylinder block machining

Advantages of EHWA diamond clay blocks:

  • Long lifetime = cost savings

  • Savings on disposal as no sulphur additives are used

Areas of application for EHWA metal bonds:

Application Grit size EHWA Bonds
Roughing D251 – D91 MB, MS, MJ Serie
Finishing D76 – D30 MB, MS, MJ Serie
Fine finishing D25 – D8 MJ, MH Serie

MB, MS, MJ | EHWA metal bonding | Connecting rod machining

DoubleS - specially coated diamond grits:

  • Very good shape accuracy on the workpiece (roundness)

  • Excellent surface quality

  • Double the lifetime compared to conventional diamonds

Common grit sizes for this application:

Grit size EHWA Bonds
D151 – D25 MJ, MH, MS Series

Lifetime: