A band saw has top and bottom guides both pressing a sawing section of a saw band out beyond a line tangent to top and bottom wheels of the band saw. The guides include holders having sockets into which guide blocks are inserted, and adjustment screws on the guide blocks abut adjustment screws on the guides to precisely locate guide faces of the guide blocks. A milling machine has a holder for receiving one of the guide blocks in a position engaging the adjustment screws of that guide block, and mills the guide face a predetermined distance from the adjustment screws. A quality control jig receives the guide block and indicates when the guide face is the desired distance from the adjustment screws.