Cam device, part manufacturing device, bearing manufacturing device, part manufacturing method, machine manufacturing method, and cam device miniaturization method

A cam device comprising:

• a cam integrally attached to a camshaft to rotatably move around the camshaft in forward and reverse directions, wherein the cam is a single cam and is the only cam of the cam device;
• a cam roller linearly moved by a rotational motion of the cam around the camshaft;
• a rotary drive device that rotationally drives the camshaft to minimize the cam device by controlling a forward rotation, a reverse rotation, a rotation stop, and a rotation speed;
• a linear motion guide device that guides a driven member that is linearly moved along with the cam roller;
• and
• an action unit attached to the driven member, wherein
• a cam surface forming a cam profile of the cam includes a rotary end at a circumferential one end, at which the camshaft is non-rotatable in the reverse direction by the cam roller, a lift region from the rotary end to the circumferential other end, on which the cam roller is abuttable, and formed of a single constant velocity curve from a vicinity of the rotary end to the circumferential other end, and a non-continuous section formed between the rotary end and the circumferential other end.