JOHNSON CONTROLS
64
FORM 100.50-NOM6
ISSUE DATE: 8/07/2017
SECTION 4 – MAINTENANCE
FIGURE 29 -
ECCENTRIC CAM LOCKING COLLAR
BEARING INSTALLATION
Do not apply excessive force to the bear-
ing housing (pillow block or flange) when
installing the bearing on the shaft.
LD06358
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.
. 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
. 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.
TABLE 26 -
SET SCREW TORQUE
SET
SCREW DIA.
HEX. SIZE
ACROSS
FLATS
LBS.
MIN. RECOMMENDED
TORQUE
INCH
LBS.
FOOT
LBS.
1/4 1/8
66 - 85
5.5 - 7.2
5/16
5/32
126 - 164
10.5 - 13.7
3/8 3/16
228 - 296
19.0 - 24.7
7/16
7/32
348 - 452
29.0 - 37.7
1/2 1/4
504 - 655
42.0 - 54.6
5/8 5/16
1104 - 1435 92.0 - 119.6
