Renold Gears has extended its SMXtra range of shaft mounted helical gearboxes for heavy duty application to include sizes 11 and 12, matching the largest equivalent units from Fenner, Benzler Sala and Dodge. The ATEX approved range is now available in 12 sizes up to 235kW capacity with a choice of single or double reduction units offering ratios of up to 25:1 and output speeds from 10 to
400rpm.
The SMXtra gearbox range is manufactured with hardened, profile-ground single helical gears with high capacity bearings to maximise load carrying capacity and service life. The units mount directly to the shaft of the driven machine, completely eliminating alignment problems as there is no need for couplings, base plates, slide rails or support structures.
Depending upon requirements, the SMXtra range can be fitted with advanced seals to provide a high degree of protection against dust and moisture ingress. Moreover, by reversing one element of the standard design, the seal can provide additional security to prevent the egress of oil into sensitive environments such as food manufacturing plants.