A device and a method are provided for machining running surfaces on head end pieces of revolving flats. The device has a base frame with a longitudinal axis and is provided with clamping devices for fixing the revolving flat at at least two points distributed on the longitudinal axis. The device comprises two chip-removal machining devices which are arranged outboard the clamping devices viewed in the direction of the longitudinal axis. A sliding guide is provided for accommodating the clamping devices in the device.

There is provided a guide dresser for milling a saw guide, the guide dresser comprising first and second cutter assemblies that are slidably mounted on a rail or slide system so as to be adjustable, in operation, between an open position and a closed position. There is also provided cutter heads and methods for milling a saw guide.