General purpose coal crushers DUF1 and DUF2 series are designed for coal and stone crushing of up to a 130 MPa of compressive strength. They are being installed into the tracks of drag collecting conveyors in mining roadways. The crusher is composed of several main parts that are bolted together. Infeed and discharge parts are flanged fixed to the centre part where a crushing drum with swing wheel is mounted through bearing housings. Position of the crushing drum is vertically adjustable in order to set size of crushed material. The crushing drum is fitted with crushing chisels that are exchangeable after being worn out. A driving electric motor is placed on the discharge part of the crusher. There is a possibility of connecting a drive with motor from left or right side of the crusher according to specific mine requirements.