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9 INTERNAL SELF-ALIGNING BALL & ROLLER BEARING UNITS

5. Handling of bearings

“C” spanners should be used where possible during these procedures that rotation is free and not
progressively tighten locknut whilst feeler gauge impaired. Taconite seals should be lubricated until
readings are taken (similar to Step 2) to achieve grease extrudes fully around labyrinth circumference.
desired “residual clearance” (Step 3). Suggested Do not “over grease” bearing housing as damage and
method is to select mid range feeler, in case of overheating can occur during initial running period. It
.
example use 140mm blade and tighten until slight should be lubriucated and plugged as Step 9, or
interference is felt. When approaching this condition lubricated with a known quantity of grease.
watch for locknut slot nearing alignment with a
Note: These Steps show Mounting Procedures when fitting
lockwasher tab. Spherical Roller Bearing and Adapter Sleeve into CBC
ÒCÓ spanner Split Bearing Housing.
Insert GENERAL NOTES
spacer
rings a) Check that the shaft diameter conforms to ISO Tolerance
h9, and IT5 for ovality.
b) Table values are for normal loads, solid shafts and bearing
After double checking that
desired residual clearance internal clearance groups of ‘Normal’ and C3. For heavy
has been reached, tab should loads (Pr>0.15 Cr) Please Consult CBC.
be bent into slot. c) After determining residual clearance in Step 3. Consult
column D in table as a double check that figure obtained
does not fall below min. permissable residual clearance.
8. The floating bearing should now be positioned d) In some applications it may not be possible to use feeler
slightly off housing centre toward locknut side of sleeve gauges to serve as tightening guide, in these cases it is
often possible to measure “Axial Displacement” between
so that as nut is tightened, bearing will be displaced adapter sleeve and inner race of bearing during tightening
approximately back to centre line. Tighten as per Step 7. (See chart Column ‘C’). These values are for relative
No spacer rings are used of course, and bearing movement between sleeve and bearing faces and can be
measured with tail end of standard vernier gauge or other
does not have to be on centre as long as adequate methods.
float is available each side of bearing between e) All joint faces are machined. Grease applied between faces
housing seat shoulders. Rotate assembly by hand and should be sufficient to act as a sealant. However, in
exposed locations we recommend jointing compound be
ensure that there is no resistance. used, especially with ’A’ type (closed) covers.
f) As with all bearing assemblies, tools and work area should
be as clean as practicable.

Table 14. Standard Tolerance Values–
Spherical Roller Bearings –Tapered Bore
U T I N m m
Float Float
A B C D
9. Lubrication is normally a No. 2 penetration mineral oil/ D E C R E A S E N I A A I X L
lithium soap grease Shell Alvania No. 2 or equivalent. B E A N I R G B O R E R A A I D L S I D L P A C E M E N T . N I M P E R S I M B I S E L
A I D M T E E R R E D I S U A L
Grease should be “worked” into bearing for as much d C L N I E T A E R R A N N A C L E T A P E R 2 1 : 1 C L E A R A N C E
of circumference as possible rotating occasionally. O V E . R N I C . L N I M M A X N I M M A X N O R M A L C 3
1
1
Basic grease capacity rule is that /2— /3 of housing 0 3 0 4 0 2 0 . 0 5 2 0 . 0 5 3 . 0 0 4 . 0 5 1 0 . 0 5 2 0 . 0
volumetric capacity be filled, this can be done by 0 4 0 5 5 2 0 . 0 0 3 0 . 0 0 4 . 0 5 4 . 0 0 2 0 . 0 0 3 0 . 0
0 5 5 6 0 3 0 . 0 0 4 0 . 0 5 4 . 0 0 6 . 0 5 2 0 . 0 5 3 0 . 0
hand prior to fitting cap which in many cases can 5 6 0 8 0 4 0 . 0 0 5 0 . 0 0 6 . 0 5 7 . 0 5 2 0 . 0 0 4 0 . 0
be “plugged” and only the taconite seals lubricated 0 8 0 0 1 5 4 0 . 0 0 6 0 . 0 0 7 . 0 0 9 . 0 5 3 0 . 0 0 5 0 . 0
0 0 1 0 2 1 0 5 0 . 0 0 7 0 . 0 5 7 . 0 0 1 . 1 0 5 0 . 0 5 6 0 . 0
via nipples on a regular basis. High temperature or 0 2 1 0 4 1 5 6 0 . 0 0 9 0 . 0 0 1 . 1 0 4 . 1 5 5 0 . 0 0 8 0 . 0
unusual applications may require a special grease 0 4 1 0 6 1 5 7 0 . 0 0 0 1 . 0 0 2 . 1 0 6 . 1 5 5 0 . 0 0 9 0 . 0
0 6 1 0 8 1 0 8 0 . 0 0 1 1 . 0 0 3 . 1 0 7 . 1 0 6 0 . 0 0 0 1 . 0
selection and should be referred to CBC Technical 0 8 1 0 0 2 0 9 0 . 0 0 3 1 . 0 0 4 . 1 0 0 . 2 0 7 0 . 0 0 0 1 . 0
Department. 0 0 2 5 2 2 0 0 1 . 0 0 4 1 . 0 0 6 . 1 0 2 . 2 0 8 0 . 0 0 2 1 . 0
5 2 2 0 5 2 0 1 1 . 0 0 5 1 . 0 0 7 . 1 0 4 . 2 0 9 0 . 0 0 3 1 . 0
SUITABLE LUBRICANTS: 0 5 2 0 8 2 0 2 1 . 0 0 7 1 . 0 0 9 . 1 0 7 . 2 0 0 1 . 0 0 4 1 . 0
Shell-Alvania R2, EP2 0 8 2 5 1 3 0 3 1 . 0 0 9 1 . 0 0 0 . 2 0 0 . 3 0 1 1 . 0 0 5 1 . 0
BP - Energrease LS2, LSEP2. 5 1 3 5 5 3 0 5 1 . 0 0 1 2 . 0 0 4 . 2 0 3 . 3 0 2 1 . 0 0 7 1 . 0
Mobil - Grease 77, Mobilux EP2 5 5 3 0 0 4 0 7 1 . 0 0 3 2 . 0 0 6 . 2 0 6 . 3 0 3 1 . 0 0 9 1 . 0
Ampol - RRs, EP Grease C2. 0 0 4 0 5 4 0 5 4 0 0 5 0 0 2 . 0 0 1 2 . 0 0 6 2 . 0 0 8 2 . 0 0 1 . 3 0 3 . 3 0 0 . 4 0 4 . 4 0 3 1 . 0 0 6 1 . 0 0 0 2 . 0 0 3 2 . 0
Caltex - Regal, Starfak, Premium 2.
0 0 5 0 6 5 0 4 2 . 0 0 2 3 . 0 0 7 . 3 0 0 . 5 0 7 1 . 0 0 5 2 . 0
10. Housing cap, after cleaning, can be assembled to 0 6 5 0 3 6 0 6 2 . 0 0 5 3 . 0 0 0 . 4 0 4 . 5 0 0 2 . 0 0 9 2 . 0
0 3 6 0 1 7 0 0 3 . 0 0 0 4 . 0 0 6 . 4 0 2 . 6 0 1 2 . 0 0 1 3 . 0
bodies (they are not interchangeable). Taconite seals 0 1 7 0 0 8 0 4 3 . 0 0 5 4 . 0 0 3 . 5 0 0 . 7 0 3 2 . 0 0 5 3 . 0
should be fitted and it may be necessary to adjust 0 0 8 0 0 9 0 7 3 . 0 0 0 5 . 0 0 7 . 5 0 8 . 7 0 7 2 . 0 0 9 3 . 0
0 0 9 0 0 0 1 0 1 4 . 0 0 5 5 . 0 0 3 . 6 0 5 . 8 0 0 3 . 0 0 3 4 . 0
housing base alignment to allow constant clearance 0 0 0 1 0 2 1 1 0 5 4 . 0 0 0 6 . 0 0 8 . 6 0 0 . 9 0 2 3 . 0 0 8 4 . 0
around circumference of rotating labyrinth and
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