Housing: Aluminium die-cast, with connecting threads on both input and output sides. With mounting holes on all other sides. Worm shaft: hardened and ground. Worm Gear: Bronze, on cast iron hub. Lubrication: synthetic oil (lubricated for life). Lightweight, high quality model range, 5 sizes, centre distance 31.5, 40, 50, 63 and 75 mm. Size 90 and 110 on request. The gearboxes can be used without ventilation and independent from the mounting position. Output shaft push-in type: The basic gearbox version has a hollow shaft. They can, however, also be supplied with a push in type output shaft (single sided, to be used left and right, or double sided). These output shafts have their own product No. and have to be ordered separately.