A brake consisting essentially of the following: a. a single piece or divided cylinder housing designed to be mounted on the torque flange of an axle. the cylinder housing has a slot or groove through which the disk, brake passes. it contains a piston(s) or push rod(s) which provides the hydraulic or mechanical force to press the lining, friction against the disk, brake. b. lining, friction. c. a disk, brake designed to be keyed or rigidly attached to a wheel or rotating shaft.