CATALOGUE

Casings
Bevel gearboxes casings have a cubic base form, with six completely machine finished outer faces and
varnished inner parts. Each face is supplied with mounting holes, while the finished hubs and flanges show
outer tolerance centerings. The casing are made of grey cast iron EN-GJL-250 (according to the UNI EN
1561:1998 requirements), except for size 500 whose casing is made of electro-welded carbon steel S235J0
(according to the UNI EN 10025-2:2005 requirements).
Bevel gearboxes
Gears
All the gears are alloy steel 17NiCrMo 6-4 (according to the UNI EN 10084:2000 requirements).
They have a Gleason ® type helicoidal geometry toothing, with variable helix angle depending on the ratio for
a better meshing and an optimum torque distribution.
The bevel gear set undergo thermal treatments like case-hardening, and carburizing and then they are runin
in couples with marking of the contact point; all this allows a perfect and noiseless meshing. All the gears
planes and holes undergo a grinding process.
Shafts
The bevel gearboxes protruding shafts are made of carbon steel C45 (according to the UNI EN 10083-
2:1998 requirements); the hollow shafts on the contrary are made of steel 16NiCr4 (according to the UNI
EN 10084:2000 requirements), and they undergo case-hardening, carburizing and grinding treatments for
their inner diameters. All shafts are induction ground and case-hardened in the contact area with the seals.
A wide range of geometries is available for the shafts: hollow shafts with key, broached or for shrink-disks,
protruding or over-size.
Bearings and market materials
Top-quality bearings and market materials are used for the whole line. All UNIMEC’s bevel gear boxes are
adapted to conical roller bearings, excluded sizes 54 and 86, for which ball bearings are foreseen.
Weight
(referred to base models)
Size 54 86 110 134 166 200 250 350 500 32 42 55
Weight [kg] 2 6,5 10 19 32 55 103 173 1050 29 48 82
162