Aluminum casing gear boxes are manufactured with high quality material in order to guarantee the maximum reliability and strength for long life of gear box. Worm shaft are made of steel which are case hardened to 58-60 HRC and profile ground. The thread grinding in the gear ratios that the module value permits is carried out with ZI-profile. This improves the contact between the toothed surface and therefore performance of the gear box. This also reduces operating noise of the gear box. The worm wheel has a G20 cast iron hub onto which a casting in AS 1 bronze RIM is fitted.

This series Gear Box Housing and flanges are made out to aluminum alloy up to sizes 90 which is virtually maintenance free and does not required oil change during their lifetime. From size 110 and above mineral oil is used in general and synthetic oil on request.

This series Gear box from Box 63 and above are mounted with 2 taper roller bearing on the worm shafts improving the mechanical resistance to axial thrust generated by the worm wheel.

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