TM 5-3895-374-24-1
Step #10 (Fig. 15) Upper Half of Housing (CAP)
The bearing seat in the upper hall of the housing (cap) should be
checked for burrs, thoroughly cleaned, oiled and placed over the
bearing. Especially with oil lubrication. Use of a sealing compound
such as Permatex No 2 at the spilt surfaces Is helpful. Sealing
compound must be applied sparingly wipe a thin near the outer
edges. Excessive amounts are forced not only out but also In between
the housing bore and bearing O D and this can pinch an outer ring or
make a free bearing actually held. The two dowel pins will align the
upper half of the housing.
NOTE: Caps and bases of pillow blocks are not Interchangeable.
Each cap and base must be assembled with Its mating part.
Lockwashers and cap bolts are then applied and properly torqued to
complete the assembly.
If shimming is required, only shims which cover the full mounting
surface of the pillow block are recommended.
Step #11. (Fig. 16) Cutaway Illustration
Here a section of the housing has been removed to show the relative
position of all the parts.
Assembly Instructions for SKF
Self-Aligning Ball or Roller Bearings (Cylindrical Bore Mounting)
NOTE: Do not remove slushing compound from bearing as it will mix
with any petroleum grease or oil.
Step #1. (Fig. 7) Inner Triple Seal - Cylindrical Bore
Slide Inboard triple seal on shaft This seal will slide freely into position.
Step #2. (Fig. 8) Press Small Bearing on Shaft
To press small bearings on a shaft, fit a clean pipe over the shaft and
rest It on the Inner ring Before pressure is applied to the bearing, apply
a coat of light oil or micronized graphite to the shaft and bearing bore.
Be sure bearing Is square on the shaft and then apply pressure using
a hammer or an arbor press.
Step #3. (Fig. 9) Bearing with Cylindrical Bore
To mount larger bearings that are not as easily pressed on shaft, heat
the bearing to a maximum temperature of 1210C (2500F). Be sure to
place supports under the bearing to isolate It from the bottom of the
container to prevent overheating the bearing. The bearing may be
heated In clean oil or In a 15% emulsion of soluble oil for 30 minutes
to one hour depending on bearing size. Alternately a temperature
controlled oven may be used to heat the bearing but only long enough
to enlarge the bearing bore for mounting and in no case for more than
4 hours. A hot plate may be used to heat the oil bath In no case should
the bearing be heated with an open flame. Mount the bearing on the
shaft firmly against the shaft shoulder. Quickly follow through with
Steps 4 and 5 to prevent the bearing drawing away from its proper
position against the shaft shoulder.
Step #4. (Fig. 10) Lockwasher
Mount lockwasher over threads on shaft with Inner prong of
lockwasher toward the face of the bearing and located In the slot of the
shaft.
Step #5. (Fig. 11) Locknut on Shaft
Apply the locknut with chamfered face toward the bearing. Tighten
with a spanner wrench and hammer until the bearing is firmly seated
against the shaft shoulder. Bend one of the lockwasher tangs into a
slot In the nut It may be necessary to further tighten the nut In order to
engage the lockwasher tang. A very slight movement of the nut will
align a slot with a tang.
Step #6. (Fig. 12) Outer Triple Seal
Slide outer triple seal onto the shaft Locate both Inner and outer triple
seals to match labynnths In the housing.
Step #7. (Fig. 13) Lower Half of Housing
Remove any paint and burrs from the mating surfaces at the spilt and
thoroughly clean the housings. The vertical hole at the bottom of each
enclosure groove must be free of foreign matter. Set lower halves of
housings on base and oil the bearing seats. Place shaft with bearings
into lower halves of housings, carefully guiding triple seals Into the seal
grooves and being certain that the bearing outer rings sit squarely In
the pillow block bearing seats. Bolt the held housing securely in place.
[The free bearing housing(s) will be located and bolted after
completing Step #8 and centering the free bearing(s) In the free pillow
block bearing seat(s) .]
Step #8. (Fig. 14) Stabilizing Ring (If required)
A stabilizing ring should be used only if the bearing is to be held. Move
shaft axially so that the stabilizing ring can be Inserted between the
“held” bearing outer ring and housing shoulder on the locknut side of
bearing. where practical. Center all other bearings on one shaft in their
housing seats.
NOTE: There must be only one “held” bearing per shaft. Other
bearing or bearings must be “free” to permit shaft expansion. If the
pillow block is to have one closed end, an end plug is supplied which
fits snugly into the triple seal housing groove in place of the triple seal It
is inserted in the lower half of the housing before the upper half is
bolted to the base. If grease is used as a lubricant it should be applied
before the upper half is secured and in accordance with the
Lubrication Notes on back page.
Step #9. (Fig. 15) Upper Half of Housing (CAP) The bearing seat In
the upper half of the housing (cap) should be checked for burrs,
thoroughly cleaned, oiled and laced over the bearing Especially with oil
lubrication, use if a sealing compound such as Permatex No. 2 at the
spilt surfaces is helpful. Sealing compound must be applied sparingly
wipe a thin film near the outer edges. Excessive mounts are forced not
only out but also In between the housing bore and bearing O D and
this can pinch an outer ring or make a free bearing actually held The
two dowel pins will align the upper half of the housing.
NOTE: Caps and bases of pillow blocks are not Inter-changeable.
Each cap and base must be assembled with Its mating part.
Lockwashers and cap bolts are then applied and properly torqued to
complete the assembly If shimming is required, only shims which
cover the full mounting surface of the pillow block are recommended.
Step #10. (Fig. 16) Cutaway Illustration Here a section of the housing
has been removed to show the relative position of all the parts.
(page 3-590)
