Worm gearbox specifications
Abbreviations for the identification of worm gearboxes:
I-MI = Round modular housing
U-MU = Square casing
MP = Gear pre-stage
MD = Double-row worm gearbox
“M “Gearmotors = single-phase or three-phase electric motor
MI – I series gearboxes are constructed in:
12 Sizes
Power input from 0.09 Kw to 18.5 Kw
Single stage reduction ratios from 1/7.5 to 1/100
Die-cast aluminium casing up to size 80 (included)
Painted cast iron casing from size 110 upwards.
MU-U series gearboxes (integral ) are manufactured in:
7 SizesApplicable gear motor power from 0.09 kW to 11 kW input
One-stage reduction ratios from 1/5 to 1/100 (U75 – U90 – U110 excluded from the 1/5 ratio)
Die-cast aluminium casing
Combined gearmotors are available on request.
All gearboxes are supplied with IEC flange for electric motor coupling, on request it is possible to have a protruding or double protruding screw.
Gear profiles
The profiles of the worm gear and the helical gear (made of bronze) are “ZI” to ensure a perfect fit and high quietness during vibration-free operation.
Shafts
All slow hollow shafts of the gearboxes are made of grey cast iron EN-GJL-250 UNI ENO 1561. In the U-MU series, stainless steel shafts are available on request.
Fast shaft bearings
From size 70 MI – I (modular) and size 75 MU-U, (integral) tapered roller bearings are installed on the fast (input) shaft.
The use of roller bearings guarantees high resistance to radial and axial loads on the shaft. On request, roller bearings can also be installed on the slow shaft.
Lubrication
The worm gearboxes of the U-MU and I-MI series up to size 90 (included) are supplied complete with lubricant and are without oil plug as lifetime lubrication of the gearbox.
The MI-I 110/130/150/175 series gearboxes, on the other hand, are supplied without oil and with a filler plug.
On request, the gearbox can be supplied complete with oil.