Fig. 2609.
When a pillow block requires to be enveloped by a wall it is provided with a wall box as shown in [Fig. 2609], and within this box is set the pillow block as shown, space being sometimes left to adjust the pillow block laterally within the box by means of a wedge as shown.
Fig. 2610.
In cases where the shafting requires to stand off from a wall to allow room for the pulleys, brackets or knees, such as shown in [Fig. 2610], are employed.
Couplings for Line or Driving Shafts.—The couplings for connecting the ends of line shafts should accomplish the following objects:—
1. To hold the two shaft ends axially true one with the other.