http://www.aliexpress.com/store/product/Worm-Gearbox-SMRV30-for-hybrid-stepper-motor/520703_793351169.html
Kindly, if you need Gearbox, pls send the Model, Ratio and Quantity of the Gearbox to us, then, we will give you the best offer.
NMRV series worm gearbox:
1) High quality aluminum alloy die cast gearbox
2) High accuracy worm gear and worm shaft
3) Less noise and lower temperature increase
4) Easy mounting and linking, high efficiency
5) Power: 0.06-7.5 kW
6) Output torque: 2.6-2,379 N.m
7) Transmission rate: 5-100
8)Inner packing: carton; Outer packing: Plywood case.
9)model number: RV 30,40,50,63,75,90
Material for RV gearbox:
Worm wheel: Nodular cast iron and bronze
Worm shaft: 20Cr steel.The hardness of surface is 56-62HRC with carbonized layer 0.3-0.5mm
Housing: aluminum with oven painting
Color: silver or blue