The precision worm shaft has different types depending on the function. It can be an optical or hollow shaft, as well as an eccentric or spline shaft. It can also be used in crankshafts, camshafts, or optical systems. Depending on the type, it can be made to be hollow, stepped, or stepped.

The center of a precision worm shaft is very important for its use. If the center of the shaft is not located properly, runout will occur. The center of a precision worm shaft is usually a square or round cutout in the shaft's bore. This cutout blocks the rotation of the shaft and helps transfer torque. For smaller bores, one can also use the bore's runout or the shaft's side surface.

The axial and circular pitches of a precision worm shaft should be equal. The axial pitch is the distance between the points of teeth on the worm. In addition, the worm's threads can be right or left handed. The lead of a precision worm shaft is the distance a specific point on the thread travels in a revolution of the worm. It is also important to consider the lead angle, which is the angle formed by the tangent to the worm's thread helix on the pitch of the cylinder and plane to its axis.

The dynamic and static coefficients of friction are determined by a variety of factors. The table below provides values for both. If the shaft is subject to vibration, the dynamic coefficients of friction will be higher than the static ones. For this reason, it is important to carefully select the gears and shafts for a gear set that experiences vibration.