A device for vehicle brakes, such as truck brakes actuatable by an S-cam, and of the type having a camshaft support bracket. The device includes an S-cam shaft, and the S-cam shaft has a shaft and an S-cam provided on an end of the shaft. The device includes a mounting adapter bracket, and a bushing support tube. The mounting adapter bracket is configured for supporting the bushing support tube on the camshaft support bracket of the vehicle. The bushing support tube is configured for receiving the S-cam shaft in it. There are a number of modular bushings provided in the tube, and each of the modular bushings is spaced apart along the length of the tube. The shaft extends through the modular bushings and is supported by them.