Materials

Gear and gear shaft steels:

Ultra clean single melted steels or Vacuum Arc Remelted (VAR) is used for gears, gear shafts, and other case hardened highly stressed components.
If required, 18CrNiMo 7-6 steel is used for lower cost gears, gear shafts, and other case hardened highly stressed components. All gears are dual shot peened.

Drive shaft and clutch shaft steels:

Aerospace grade materials as BS S155 (300M) Vacum Arc Remelted (VAR) steel for high torque drive shafts. Ultimate tensile strength is 1900 - 2100 MPa. Normally shot peened.

Ovako Ovax 500 (Produced in ultra clean process) drive shafts. Strength and fatigue characteristics as for 300M drive shafts, but at a lower cost. Normally shot peened.


Aluminium alloys:

Only stress relieved (Swiss produce) highest quality aerospace alloy materials are used for gearbox casings and covers. The specification is higher than for 7075 aluminium alloy. No castings or magnesium alloys are used.

Bronze alloys:

High strength or bronze alloys with optimum bearing properties are used whenever required.