Cold Saw/V1 Design Rationale/Blade Rotation System

• Hydraulic Direct Drive: provides high torque and low speed operation without a gearbox

• Comments:

Because direct drive is used, a shaft coupling can be directly mounted onto the shaft of the hydraulic motor. The shaft coupling is held to the hydraulic motor shaft by a set screw.

A precise rod is inserted into the other end of the shaft coupling; this rod allows the other components to be mounted precisely at the center of the axis of rotation.

A large diameter mounting disc (a large thin cylinder) is welded onto the rod end of the shaft coupling at a precisely perpendicular angle such that the blade is precisely perpendicular to the axis of rotation as well if the blade is pressed against the mount disc.

Another mount disc is mounted into the rod after the blade so that the blade is supported from both ends by a mount disc.

Both mount discs have a pinhole pattern that matches the pinhole pattern on the blade. Pins are inserted into the matched pinholes such that high