Brochure

Mtd. Ball
Bearings
G-250
®
Mounted Ball Bearing Engineering Section
Replacing Existing Sealmaster Gold Inserts:
Note: Replacement Sealmaster bearing inserts are intended for use in Sealmaster housings only.
NOTICE
• These bearings are designed for maximum permissible
static misalignment of ± 2 degrees. Installation, handling or
operation of the bearing in excess of the maximum of ± 2
degrees can cause reduction in bearing performance and may
lead to equipment failure.
• Do not strike or hammer on any component of the bearing
and/or shaft. Impact can result in damage to the bearing that
may cause reduction in bearing performance and may lead to
equipment failure.
Step 1: Loosen and Remove Housing
Mounting Bolts
Step 2: Remove Bearing from Shaft
Loosen the locking mechanism and slide the bearing off the
shaft.
Step 3: Remove the Bearing Insert from the
Housing
Secure housing in a vise. Remove lubrication tting and lock
pin from the housing. Do not discard the lubrication tting or
lock pin. Remove insert from housing in the following fashion:
a. For Spherical OD Inserts:
Using a bar placed in the insert bore as a lever, swing the insert
to line up the outer ring with the load slots and remove insert
from load slots.
b. For Expansion (AR) Inserts:
Slide the insert in the axial direction out of the housing.
Step 4: Inspect and Prepare Housing
Housings should be inspected for damage prior to installa-
tion. Wipe housing bore clean as necessary and check that
the lubrication hole is clean and free of debris. Wetting of the
housing bore with oil or grease may be done to ease installa-
tion of bearing insert.
Step 5: Load New Insert
With the bearing housing still in the vise, load the insert in the
following fashion:
a. For Spherical OD Inserts:
i. Place the bearing insert into the housing load slots,
positioning the insert outer ring dimple and lubrication
hole in line with the housing lubrication hole.
ii. Using a bar placed in the insert bore as a lever, swing
the insert into place within the housing. Insert should
have a snug t in the housing. If insert can be made to
swivel by hand in the housing bore, t is too lose and
entire unit should be replaced. If heavy force is required,
t is too tight and entire unit should be replaced.
iii. Ensure alignment of the outer ring dimple and
lubrication hole and housing lubrication hole.
b. For Expansion (AR) Inserts
i. Slide bearing insert into the housing.
ii. Ensure alignment of the outer ring dimple and
lubrication hole, brass ring lubrication hole, and housing
lubrication hole.
Step 6: Install Lock Pin and Lubrication
Fitting
Place the lock pin in the housing lubrication hole, ensuring
that it seats in the outer ring dimple. Tighten the lubrica-
tion tting into the housing lubrication hole until snug, then
loosen ¼ turn.
NOTICE:
Over tightening or under tightening of the lubrication tting
may lead to reduction in bearing performance.
Step 7: Refer to Steps 1 - 6 from the
“Mounting Housed Bearing Units” Section
Pages G-246 to G-247
Lock Pin