Installation Instructions
Set Screw an Skwezloc Locking
SEALMASTER Ball Bearing zone hardened, extended inner races are ground for a sliding fit over the
shaft. Set screw locking bearings are easily and securely locked to the shaft by means of two self-
locking, cup point, socket head set-screws. A positive race-to-shaft lock is attained when the ground
threads of the set crews are securely tightened through the soft extended ends of the inner race. The
hardened cup point penetrates the shaft surface trapping the shaft material. The cup has flat faceted
surfaces inside which prevent the set screw from backing out during operation.
Skwezloc locking units are locked by tightening a single socket head cap screw in the collar. Uniform
clamping pressure in a concentric grip is attained which does not intend to mar the shaft.
Mounting Instructions
Set Screw Locking
1. Use clean shafting free of nicks and burrs. If old shafting is used, locate SEALMASTER bearing on
an unused section.
2. Make certain set screws are clear of bore.
3. Slide SEALMASTER bearing into position on shaft. Never hammer the ends of the inner race, as
they may be damaged. If necessary to apply force, use a brass bar or pipe against the inner race
only to drift bearing into place. Never strike the housing as it may damage the baring.
4. Bolt Housing to support
5. Rotate shaft to make certain it turns freely
6.
Tighten self-locking, cup point set screws securely onto the shaft. If a torque wrench is used, see
Table 2.
Skwezloc Locking
1. The optional SKWEZLOC locking unit is assembled on the shaft as per points 1 through 5 above.
Then, slide the collar into position on the extended end of the inner race seating it squarely against
the shoulder. Tighten the capscrew to the torque indicated in Table 3 below. Do not exceed the
indicated Torque Value.
Table 2
Torque for Tightening Set Screws
Minimum Recommended
Torque
Set Screw
Diameter
Hex Size
Across
In-Lbs
Ft-Lbs
1/4
1/8
66
5.5
5/16
5/32
126
10.5
3/8
3/16
228
19.0
7/16
7/32
348
29.0
1/2
1/4
504
42.0
5/8
5/16
1104
92.0
Table 3
Torque for Tightening Skwezloc Collars
Minimum Recommended
Torque
Cap Screw
Size
Hex Size
Across
In-Lbs
Ft-Lbs
#8-32
UNC-3 A
1/8
70
5.8
#10-24
UNC-3 A
9/64
90
7.5
#1/4-20
UNC-3 A
3/16
180
15
#5/16-18
UNC-3 A
1/4
400
33.3
