Johnson Controls 100 Series User Manual

JOHNSON CONTROLS
56
FORM 100.50-NOM12
ISSUE DATE: 04/02/2019
SECTION 4 – MAINTENANCE
Eccentric Type
An eccentric self-locking collar is turned and driven
with a punch in the direction of shaft rotation to lock
the bearing inner ring to the shaft. See Figure 23 on
page 56.
LD06357
FIGURE 22 - BEARING WITH ECCENTRIC CAM
RECESSED CAM OR SELF-
LOCKING COLLAR
SELF LOCKING COLLAR
CAM OR INNER RING
BALLS AND RACEWAY
INNER RING
OUTER RING
SEAL ASSEMBLY
When the eccentric collar is engaged to the cam on the
bearing inner ring and turned in direction of rotation, it
grips the shaft with a positive binding action. The col-
lar is then locked in place with the setscrew provided
in the collar.
The self-locking collar is placed on the shaft with its
cam adjacent to the cam on the end of the bearing’s
wide inner ring. In this position, with collar and bearing
cams disengaged, the collar’s bore is concentric with
that of the bearing’s inner ring. The wide inner ring is
loose on the shaft. By turning the collar in the direction
of normal shaft rotation, the eccentric recessed cam
will drop over and engage with the corresponding cam
on the bearing inner, causing it to grip the shaft tightly
with a positive binding action. See Figure 23 on page
56 and Figure 24 on page 57. Make sure the two
cams engage smoothly and the locking collar is down
flat against the shoulder of the inner ring. The wide
inner ring is now locked to the shaft. Using a punch
or similar tool in the drilled hole of the collar, tap the
tool lightly to lock the collar in the direction of normal
shaft rotation.
As a final step, the setscrew is tightened. Torque per
Table 18 on page 57. It exerts a wedging action to
hold the collar always in the engaged position, even
under shock and reversing loads.
To disassemble, loosen the setscrew and tap the collar
in the direction opposite shaft rotation.
Do not apply excessive force to the bear-
ing housing (pillow block or ange) when
installing the bearing on the shaft.
LD06358
FIGURE 23 - ECCENTRIC CAM LOCKING COLLAR
BEARING INSTALLATION

Johnson Controls 100 Series Specifications

General

Brand	Johnson Controls
Model	100 Series
Category	Air Conditioner
Language	English