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Water pump bearings 
 
Water pump bearings are double row bearings and, in contrast to conventional double row bearings, do not have an inner ring but raceways machined directly into the surface of the shaft. As a result, there is more space available for the rolling elements, giving a higher specific load carrying capacity than that of solutions with conventional single bearings. Furthermore, it is possible in this type of bearing to achieve economical combinations of ball and roller rows. In a small design envelope, this gives a broad range of load carrying capacities.
The use of a common outer ring for two rows of rolling elements prevents misalignment defects, eliminating the risk of undesirable distortion of the bearings.
In water pump bearings, the ends of the shaft normally extend beyond the outer ring on both sides. The length and diameter of these extended sections are matched to the specific application. This results in
a simple, ready-to-fit bearing unit that is primarily used in water pumps for road vehicles.
However, they are not restricted to this application.
Due to the advantages described above, they have a wide range of possible applications.
They can be used, for example, in:
■ fans
■ tension pulleys
■ vane pumps
■ angle grinders.
Since they are not restricted to use in water pumps, water pump bearings are also described in English as Integral shaft bearings.

Designation system

A new designation system has been developed for water pump bearings,  The design of the bearing can be deduced from the designation.
 
1.The letter W stands for “Water pump bearing”.
2.The second letter indicates the design: 
  A: Ball/ball, asymmetrical design
  B: Ball/ball, symmetrical design R: Roller/ball
  T: Roller/ball, three point contact F: Roller/ball, four point contact
3.This figure indicates the number of shaft shoulders:
  0: Smooth shaft
  1: One end of the shaft has a shoulder 
  2: Both ends of the shaft have shoulders
4.Four digit serial number
5.Variant (e.g. different seal material)
QQ截图20190719094451


Design: Roller/Ball   WT,WR,WF Series
图片2

Dimension table (continued) · Dimensions in mm
Outer ring diameter Designation Mounting dimensions Previous designation
D









L L1 L2 C dk D11 D22 L11 L22
38,1 WR17013 134,87 37,34 43,55 54 18,961 12,038 41,25 WKN2531-9D
WR17024 134,87 37,34 43,55 54 18,961 15,918 41,25 WKN2531
WR17227 134,88 30,1 50,8 54 18,961 12,038 48,5 WKN2531-8D
WR17027 135,64 31,88 49,78 54 18,961 15,918 47,48 WKN2534
WR17037 135,64 31,88 49,78 54 19,012 15,977 47,48 WKN6534
WR17028 137,92 33,14 50,8 54 18,961 12,038 48,5 WKN2543-3D.TJ3315
WR17029 138,27 24,11 60,18 54 18,961 12,038 57,88 WKN2544D
WR25109 142,3 39,43 48,77 54,1 18,966 15,918 15,918 35,8 45,3 F-45648
WR27030 143,48 30,83 58,67 54 18,961 15,918 15,918 12,24 56,37 WKN2564-5.TJ1962
WR17117 144,15 32,47 57,7 54 18,961 12,038 55,4 WKN2567D
WR17031 144,7 32,05 58,67 54 18,961 15,918 56,37 WKN2569.TJ3222
WR14024 148,85 28,24 66,63 54 18,961 12,038 64,33 IH-RW387405AFS2-LC5G75 (L)
WR271011) 151,87 22,5 75,39 54 18,961 18,009 8,395 19,5 36,91 WKN2597.T3637
WR17118 152,15 40,47 57,7 54 18,961 12,038 55,4 WKN2599D
WR17032 153,42 45,75 53,69 54 18,961 15,918 51,39 WKN2604
WR17033 156,59 39,62 62,99 54 18,961 15,918 60,69 WKN2616
WR27034 157,99 46,74 57,27 54 18,961 15,918 15,918 14,78 54,97 WKN2622
WR17036 174,75 52,53 68,24 54 18,961 12,038 65,94 WKN2688-7D
WR27035 174,75 52,53 68,24 54 18,961 15,918 15,918 14,1 65,94 WKN2688
40 WR01565 62,65 22 1,75 38,9 20,004
WF015556) 85,25 1,75 33,5 50 20,004
WR014186) 85,25 1,75 33,5 50 20,004
WT11353 103,3 20,5 43,9 38,9 20,004 12,038 38,9
WF11549 129,8 27 52,8 50 20,004 12,038 47,4
WF116724) 132 17 61,5 53,5 20,004 16 56,5
WF110616) 143 31,5 61,5 50 20 16 55
WF21171.31) 151 51,6 49,4 50 20 14,5 16 49 44
WF111926) 168 45 73 50 20,004 12,038 64
42 WR040311) 80 32 2,1 45,9 22 IH-RW428620-LD5G75
WR24020 115,5 26,5 43,1 45,9 22 18 13 24 40,8 RCHL-RW428604-LCF5G75
WR24021 127,5 26,6 55 45,9 22 18 12 24,8 52,7 RCHL-RW428621A-LCF5G75
WR24022 129,5 28,5 45,1 55,9 22 18 12 26,15 42,8 RCHL-RW428623A-LCF5G75
WR14003.011)3) 135,7 18,8 61 55,9 22 12,038 58,7 RCHL-RW428617-LD5F4L5G68
WR14016 142 41 55,1 45,9 22 16 52,8 RCHL-RW428602-LC5G68
47 WT11527 124 27 47 50 24 16 40
WT211566) 124 27 47 50 24 20 12,038 25,5 46
WT113526) 134 27 57 50 24 16 50
47,625 WR17626 137,93 33,15 50,8 54 25,4 12,038 48,5 WNS2543D
55 WR011231) 72 10 2 60 25,021
WR01125 86 25 1 60 25,061
WR11122 110 25 25 60 25,061 16,056 24
WR111042) 127 25 42 60 25,061 15,056 37,5 F-200907
WR171042) 127 25 42 60 25,061 15,056 37,5 WNS2500-1
WR171032) 127 25 42 60 25,061 16,056 38,75 WNS2500
WR111422) 137 25 52 60 25,061 16,056 47,5
WR27105 145,54 31,88 53,66 60 25,061 18,961 15,918 28,7 51,36 WNS2572.T3264
WF11228 150 30 63,5 56,5 25,061 16 61,5 WNS2590
WR27106 153,29 32 61,29 60 25,061 18,961 15,918 13,59 58,99 WNS2603
WR27107 156,6 35,43 61,17 60 25,061 18,961 15,918 13,59 58,87 WNS2616-6
WR11103.4 187 25 62 100 25,061 15,056 42

1)  Special shaft
2) Flinger sleeve
3) R-SAFE seal
4) Rotary shaft seal
5) No seal
6) Outer ring with locating hole

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