Rugged design, Easy to install, Longer working life
The casing is made of closely grained FG-260 Grade C.I.
The gear box is provided with amply designed fins with suitable fan for adequate dissipation of heat generated.
The entire design is based on BS721:1963 to accuracy class A.
The gear box design is such that it is interchangeable with the standard gear boxes.
The worm shaft is of high quality case hardening steel very accurately generated and ground finished for better performance.
The worm wheel is made of extremely high quality phosphor bronzes sandwich cast/ spin cast with considerably substantial section, rigidly bonded with the hub.
Both worm and worm wheel shafts are mounted on high quality taper roller/ angular contact bearings to take care of axial thrust and overhung loads.
Subject to the limitation of 90 C temperature, under full load, Fenner gearbox will provide minimum gear life of 20000 Hrs. the gear box requires absolutely no attention, except to check the oil level once every fortnight.
Fenner worm gear box is available with ratios of 5:1 to 70:1.