Belt drive

Roller-type rocker arm with hydr. valve-lash adjustment

Special rocker arm models allow one, two, or three valves to be operated. An insert element is used as a contact for each valve and hydraulically adjusts the valve lash for each valve separately.

The base plate of the roller type rocker arm is, preferably, made of aluminum or steel, and incorporates the following components:

  • A pin
  • A cam roller with needle roller bearing supports
  • A hydraulic insert element


  • Very low friction in valve train
  • Low space requirements since all valves can be operated by one camshaft
  • Low cam wear
  • Reduced CO2 emissions
  • Increased fuel efficiency
  • Sheet steel rocker arms reduce cost and weight

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