These Brevini planetary gear units with rotating outer casing are designed to fit into the winch drum. The performance of both the PWD and SLW-SLC series has been rated in conformity with FEM M5 standards with an output speed of 15 rpm, the world standards on the market for self-propelled and onboard cranes. Brevini winch drives are the ideal solution for all lifting applications: our planetary gear are especially designed for use as winch drives inside cable drums, available with hydraulic and electric motor adaptor. The SMW Series have a planetary pre-stage reduction gear on the input side. They feature two close-mounted flanges, one of which is attached to the winch frame and the other of which is fixed to the cable drum, the drive housing therefore acts as the main drum mounting.