1. Reference planes of the base plate on which shafts are to be installed
Shafts must be installed parallel to the reference planes so that the linear table
can move accurately. Usually, the upper face and one end face of a shaft holder
fixing plate (e.g., base plate) are used as the reference planes. (See Figure 1)
Example 1 (Figure 1):
1. Reference plane B 2. Reference plane A 3. Parallel
to reference plane B 4. Parallel to reference plane A
2. Shaft holders and shape of shaft ends
Shape of shaft ends suitable for the structure of your mechanism should be selected.
In the case of Figure 1, the base plate does not have any reference for positioning,
thus two shafts are made parallel by the adjusting them during their installation.
Installing the shaft holders
- Fix two shaft holders for securing the first shaft perpendicular to the face of
the base plate.
- Put one shaft through the bushing on one side of the movable table, install it onto
the shaft holder, and fix the shaft to the shaft holder.
- Put the other shaft through the movable table bushings, and temporarily loosely
fasten the two shaft holders with fixing bolts.
- Slide the movable table slowly to confirm that the table moves smoothly before you
tighten the fixing bolts firmly.
Example 2 (Figure 2):
1. Precision Linear Shaft, stepped and tapped (selectable concentricity)
2. Ensure that the boring hole is perpedicular to the fixing plate.
Shape shaft ends
Example 3 (Figure 3):
1. Figure 3 shows the structure in which the shaft is installed perpendicular to
the shaft fixing plate to allow the air cylinder to move without adding any load.
Note: In order to install two shafts perpendicular to the shaft fixing plate,
shafts with stepped and tapped ends are used. Dimensional accuracy and concentricity
of the shouldered section allow the shafts to be fixed at a right angle.