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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: Ball/Ball   WA,WB Series
QQ截图20190719100617

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









L L1 L2 C dk D11 D22 L11 L22
24 WB01693.023) 65 14 31 20 12,038
WB01351.11)4) 76,6 13,3 36,3 27 12,055
WB01027.3 80 16,5 36,5 27 12,008
WB01028.01 81,5 19 32,5 30 12,038
WB01083 85 21 37 27 12,038
WB01210 86,6 14,2 39,02 33,4 12,738
30 WB11098 65 14,2 28,9 21,9 15,918 10 27,4
WA07066 65,85 25,01 2,04 38,8 15,918 WS2263
WB21225 66,65 8,3 31,35 27 15,918 13,038 12,038 6,5 30,2
WB17291 67,5 11,6 32,9 23 17,2 12 29,9
WB01007.1 68 25,5 3,6 38,9 15,918
WB01005 68 25,5 3,6 38,9 16
WB21318.11)5) 71 14 39 17,8 15,918 12 12,038 11 31,3 WB2 1318.1
WB05091 73,4 4 30,56 38,84 15,918 F-112005
WB07072 73,41 4,05 30,56 38,8 15,918 W2289
WB070731) 73,41 4,05 30,56 38,8 15,918 W2289-1.T1805
WB11294.067) 77,95 15 35,95 27 15,918 12 34,95
WB11597 77,95 15 35,95 27 15,918 12,038 34,95
WB07012 79,1 13,6 38,6 26,9 15,918 WS2311
WB01138.1 80 14 38 28 15,918
WB07068 80,04 15,85 37,29 26,9 15,918 WS2315-2
WB11033 82 17 38 27 15,918 12,038 35
WB07075 82,55 4,06 39,69 38,8 15,918 W2325
WB117563) 82,6 14,2 38,5 29,9 15,918 12,038 33
WB01069 83,15 16,05 42,1 25 15,918
WB11357 83,32 16,15 37,17 30 15,918 12,738 30,84
WA11280 83,5 15,5 40 28 15,918 12,038 38
30 WB213271)4) 84 12,5 45,5 26 15 12,038 12,5 44
WB05090 84,3 15,3 41,5 27,5 15,918 F-112003
WB11413 84,3 20,8 36,5 27 15,918 12,008 34,5
WB07071 84,5 17,34 40,26 26,9 15,977 WS6332-1
WB17069 84,63 17,37 40,36 26,9 15,918 12,038 38,06 WS2333-3
WA11238.1 85 13,5 43,5 28 15,918 12,038 38
WA11065.3 85 17 40 28 15,918 12,038 38
WA27126 85 17 41 26,9 15,918 15,008 12,038 14,2 38,8 WS2334-6.H73C
WA11002.02 85 17 41 27 15,008 12,038 38 F-113035
WB11074.077) 85 17 41 27 15,918 12,038 35
WB11074 85 17 41,1 27 15,918 12,038 35
WB070761) 85,89 3 44,09 38,8 15,918 W2338.TT2363
WA11349.23) 86,5 13,5 46 27 15,918 12,038 44
WB051132) 87,5 13,5 38 36 15,008 F-110539
WB010012) 87,5 13,5 38 36 15,008
WB11132 87,5 15,5 50 22 15,918 12,038 48,5
WB11397 88 16 45 27 15,918 12,038 42
WB01070 88 18 43 27 15,918
WB11073 88,6 14,2 44,4 30 15,918 12,038 39
WB17070 89 18,1 44 26,9 15,918 12,038 41,7 WS2350-1
WB11097.1 89 21 41 27 15,918 12 35
WB01322 90,1 16 49,1 25 15,918
WB05119 92,2 15,3 49,4 27,5 15,918 F-45566.3
WB11464 92,5 15,5 50 27 15,918 12,038 47
WB01121 94,35 17,5 37,95 38,9 15,918
WB11529.014) 94,37 20,91 46,56 27 15,918 12 44,61
WA17129 95,43 20,91 47,62 26,9 15,918 12 45,32 WS2376.J3760

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

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