1). Housing:die-cast aluminum alloy(frame size:025 to 090) ;cast iron(frame size:110 to 150);
2). worm:20Cr,carbonize&quencher heat treament make the hardness of gear's surface up to 56-62 HRC, retain carburation layer's thickness between 0.3 and 0.5mm after precise grinding;
3). worm wheel:wearable stannum bronze alloy.
Features
1). Made of high-quality aluminum alloy,light weight and non-rusting
2). Large output torque
3). Smooth running and low noise,can work long time in dreadful conditions
4). High radiating efficiency
5). Good-looking appearance,durable service life and small volume
6). Suitable for omnibearing installation
7). Every product must be tested before sending
Package: for product, carton packing (RV040 foam-in-place)(025&030 foam sheet) (050-090 shaping foam) (110-150 wooden case),for delivery, wooden case.
