Updates for the SKF catalogue Rolling bearings

This page lists changes we made to the online information that also affect the printed catalogue with publication number PUB BU/P 10000. The publication number of your catalogue is specified on the first page following its cover.

The errata information given here is displayed according to the editions of the catalogue and their chapters. The edition of your catalogue is specified as a suffix of the publication number: e.g. PUB BU/P 10000/2 denotes edition 2. However, no suffix denotes edition 0.

Please use this information to keep your catalogue up to date.

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Edition 2

Bearing specifics - Section E

Page 151
Explanation:
The description of stainless steel (high chromium content steel) was wrong.
Correction:
X65Cr13

In print: correction shown in red
Current online version

Design considerations - Section F

Page 212 - diagram 2
Explanation:
Bearing frictional moment is not asymptotically limited to 2,0
Correction:
Replaced the graph with corrected version.
Current online version

Deep groove ball bearings - Section 1
Page 318
Explanation:
The permissible speed for grease lubricated bearings with a ring centred cage should be lower.
Correction:
SKF recommends oil lubrication for bearings with a ring centred cage (designation suffix MA or MB). When these bearings are grease lubri­cated (→Lubrication, page 239) the speed factor is limited to A ≤ 250 000 mm/min.

In print: correction shown in red
Current online version

Deep groove ball bearings - Section 1
Pages 392, 404
Explanation:
The basic dynamic load rating for Stainless steel deep groove ball bearings W 6305, W 6305-2RS1 and W 6305-2Z was too high.
Correction:
25   62   17   17,8   11,2   0,48   26 000   17 000   228  W 6305
25   62   17   17,8   11,2   0,48   -               7 500   235  W 6305-2RS1
       62   17   17,8   11,2   0,48   26 000   13 000   236  W 6305-2Z

In print: correction shown in red
Current online version

Cylindrical roller bearings - Section 5
Page 596
Explanation:
Wrong exponent in formula for permissible axial load in circulating oil applications (Fap oil).
Correction shown in red:

Current online version

Tapered roller bearings - Section 7 
Page 813 - table 5
Explanation:
Some formulae are wrong because indices are mixed up.
Correction:

Load cases 1a and 1b, axial load FaA

Load case 2a, axial loads FaA and FaB

Load case 2b, condition Ka

Current online version

Bearing accessories - Section 16
Page 1320
Explanation:
HME 3180 and HM 3180 lock nuts are not listed with the correct spanner.
Correction:
HME 3180 TMFN 64-80
HM 3180   TMFN 64-80

In print: corrections shown in red
Current online version


Edition 1

Design considerations - Section F

Page 174 - table 4
Explanation:
A housing tolerance of J6 provides a transition fit.
Correction:
J65)    In most cases, can be displaced

In print: correction shown in red

Needle roller bearings - Section 6

Page 736
Explanation:
Product BK 2020 is single row and should not be marked with a footnote.
Correction:
20    26    20    15,1    26,5      3,15    12 000    14 000    BK 2020

In print: correction shown in red
Current online version

Track runner bearings - Section 14

Page 1115
Explanation:
Dimension for outer ring width of Support rollers (R)NA 22 design does not follow ISO 15, dimension series 22
Correction:
Dimension standards (R)NA 22 designs
                                      ISO 15, dimension series 22,
                                      except for the outer ring width

In print: correction shown in red
Current online version

Page 1115
Explanation:
Wider tolerance for NNTR support rollers, width B
Correction:
  • width B, NNTR design: 0/-0,5 mm
In print: correction shown in red
Current online version


Bearing accessories - Section 16

Pages 1304 and 1306
Explanation:
The column headings B and B1 are in the wrong place. They must change place.
Correction:
d1     d     d3     B1     B     B4     G     ...

In print: corrections shown in red
Current online version

Page 1337
Explanation:
KMT 24, 32 and 40 lock nuts are not listed with the correct spanner.
Correction:
KMT 24   HN 21-22
KMT 32   TMFN 23-30
KMT 40   TMFN 30-40

In print: corrections shown in red
Current online version


Edition 0

Design considerations - Section F

Page 203 
Explanation:
The unit for the taper is the slope, not degree.
Correction:
where
Δk = the permissible deviation of the slope of the taper
Vk = the permissible range of dispersion of the slope of the taper

In print: corrections shown in red
Current online version

Page 214
Explanation:
The internal clearance reduction should be calculated using the bearing mean diameter.
Correction:
Δrtemp = α dm ΔT
dm = bearing mean diameter [mm]
      = 0,5 (d + D)

In print: corrections shown in red
Current online version

Lubrication - Section G

Page 251 - table 4
Explanation:
Three symbols for the grease characteristics are incorrect.
Correction:
LGGB2 – Rust inhibiting properties  o  (not +)
LGLT2 – Rust inhibiting properties  o  (not +)
LGHP2 – Severe vibration  o  (not +)

In print: corrections shown in red
Current online version

Angular contact ball bearings - Section 3

Page 516
Explanation:
The basic load ratings, the fatigue load limit and the speed ratings for bearing 7221 BECBM are too low.
Correction:
105   190   36   156   150   5,2   4 300   4 300   *7221 BECBM

In print: corrections shown in red
Current online version

Page 518
Explanation:
The basic load ratings, the fatigue load limit and the speed ratings for bearings 7322 BECBM and 7322 BCBP are too low.
Correction:
110   240   50  240   245   7,8   3 600   3 600  *7322 BECBM
         240   50  240   245   7,8   3 600   3 600  *7322 BECBP

In print: corrections shown in red
Current online version

Cylindrical roller bearings - Section 5
Page 626
Explanation:
The basic load ratings and the fatigue load limit for bearing NJ 422 are too high.
Correction:
110    280    65    523    585      64    2 600    3 200    NJ 422

In print: corrections shown in red
Current online version

Page 642
Explanation:
NUH 2248 bearings have an outer diameter of 440 mm.
Correction:
240    440    ...    NUH 2248 ECMH
          440    ...    NUH 2248 ECMH/PEX

In print: corrections shown in red
Current online version

Spherical roller bearings - Section 8

Page 885
Explanation:
Diagram is only valid for up to a maximum relation of Fa/Fr.
Correction:
The diagram is valid for bearings in light to normal load applications (P ≤ 0,1 C) on a horizontal shaft and a load ratio Fa/Fr ≤ e.

In print: correction shown in red
Current online version

Spherical roller thrust bearings - Section 13
Page 1080
Explanation:
The last sentence under Misalignment could be more clear.
Correction:
When designing bearing arrangements with rotating housing washer in combination with misalignment or when the shaft wobbles in relation to the housing, contact the SKF application engineering service.

In print: correction shown in red
Current online version

Page 1081
Explanation:
The title for table 1 needs an extension.
Correction:
Table 1
Permissible angular misalignment for rotating shafts

In print: correction shown in red
Current online version

Page 1086
Explanation:
Under Axial clearance, bearings with designation suffix VU029 should be mentioned.
Correction:
... For these applications, bearings with a modified shaft washer (designation suffix VU029) should be used. Small axial clearance enables simple and cost-effective bearing arrangements e. g. for ...

In print: correction shown in red
Current online version

Page 1089
Explanation:
In the designation system, add VU029 under Group 4.6.
Correction:
VU029    Shaft washer modified for applications with small axial clearance

In print: correction shown in red
Current online version

Track runner bearings - Section 14

Page 1114
Explanation:
Single row cam rollers follow ISO dimension series 02.
Correction:
Dimension standards   ISO 15, dimension series 02, except ...

In print: correction shown in red
Current online version

Bearing accessories - Section 16 

Pages 1304 and 1306
Explanation:
The dimension B is listed in the table, but not shown in the sketch.
Correction:
Add the lock nut width B to the illustration. B is the lock nut width without the locking device.

In print: correction shown in red
Current online version
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