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









L L1 L2 C dk D11 D22 L11 L22
36 WB151112) 90,7 13,95 37,85 38,9 17,008 – 15,008 – 34 F-92025
WB110852) 90,7 14 37,7 39 17,008 – 15,008 – 34 F-92025
WB11133.1 92,5 17,8 35,7 39 17,008 – 15,008 – 34,5 –
WB27065 96 17 42 37 20 15,918 15,918 17 41,6 WS2377-2.H43
WB110661) 104,5 49,5 2 53 23,502 16,984 – 8,5 – –
WB11081 112 20 62 30 20 – 12,008 – 45,85 –
WB210641) 116,7 27,9 35,8 53 23,502 16,984 15,008 8,5 32,2 –
WB11044 126,4 17 49,4 60 20,004 – 15,002 – 43,7 –
WB21043 135,2 25 50,2 60 20,004 15,944 15,002 8 41 –
WB210491) 145,7 33,3 64,4 48 20 14,984 15,002 14,7 63,4 –
WB21109 156,7 22,3 86,4 48 20 14,984 15,002 3,7 74,4 –
WB210501) 159,2 33,3 77,9 48 20 15 15,002 14,7 76,2 –
38,1 WB071621) 63,5 4,74 4,78 54 18,961 – – – – WK2250.T1428
WB27251.1 105,76 39,54 39,22 27 19,861 15,861 13,776 39,54 12,7 –
WB271081)5) 110,24 39,54 43,7 27 15,861 – – – – WS2434.T3763
WB17109 119,05 26,59 51,18 41,3 18,961 – 15,918 – 48,88 WS2468-2
WB17088 120,5 25,8 40,72 54 19,012 – 12,089 – 38,42 WK6474-2D
WB27163 125,73 30,86 40,89 54 18,961 15,918 15,918 27,43 38,59 WK2495
WB17164 127 31,36 41,66 54 18,961 – 15,918 – 39,36 WK2500-2
WB17089 127 31,37 41,65 54 19,012 – 15,977 – 39,35 WK6500-2
WB17165 127,25 29,13 44,14 54 18,961 – 15,918 – 41,84 WK2501
WB27166 127,48 31,03 42,47 54 18,961 15,918 15,918 13,72 40,17 WK2501-3
WB27090 127,48 31,03 42,47 54 19,012 15,918 15,977 13,72 40,17 WK6501-3B
WB15100 131,3 28,4 48,8 54,1 18,961 – 15,918 – 44,7 F-112032
WB151012) 131,6 24,5 53 54,1 18,961 – 15,918 – 49,1 F-112033
WB17081 133,35 24,21 55,16 54 18,961 – 15,918 – 52,86 WK2525
WB17091 134,87 37,34 43,55 54 19,012 – 15,977 – 41,25 WK6531
WB17092 135,64 31,88 49,78 54 19,012 – 15,977 – 47,48 WK6534
WB17093 141,98 31,75 56,25 54 19,012 – 15,977 – 53,95 WK6559-2
WB27167 143,48 30,83 58,67 54 18,961 15,918 15,918 12,24 56,37 WK2564-6
WB27094 143,48 30,83 58,67 54 19,012 15,918 15,977 12,24 56,37 WK6564-6B
38,1 WB17168 144,15 32,47 57,7 54 18,961 – 12,038 – 55,4 WK2567D.M3564
WB27083 146,05 36,32 55,75 54 18,961 15,918 15,918 13,72 53,45 WK2575-1
WB15102 150,5 35 61,4 54,1 18,961 – 15,918 – 57,3 F-112038
WB070991) 152,4 34,93 63,49 54 19,037 – – – – WK8600.T1617
WB27084 152,4 35,56 62,86 54 18,961 15,918 15,918 15,26 60,56 WK2600
WB17085 153,42 45,72 53,72 54 18,961 – 15,918 – 51,42 WK2604
WB17095 153,42 45,72 53,72 54 19,012 – 15,977 – 51,42 WK6604
WB15103 153,7 45,9 53,7 54,1 18,961 – 15,918 – 49,6 F-112039
WB27086 154,23 29,75 70,5 54 18,961 15,939 15,939 8,9 68,2 WK2607A
WB17096 156,59 39,64 62,97 54 19,012 – 15,977 – 60,67 WK6616-2
WB27097 157,99 46,74 57,27 54 19,012 15,918 15,977 14,8 54,97 WK6622B
WB27087 161,93 35,56 72,39 54 18,961 15,918 15,918 15,14 70,09 WK2637
WB27098 161,93 35,56 72,39 54 19,012 15,918 15,977 15,14 70,09 WK6637B
40 WB11269.1 53,7 10,2 1,5 42 24,5 18 – 7,2 – –
WB07269 79,1 14,67 27,43 37 15,918 – – – – WS.559329
WB11213 79,7 10 47,7 22 24,502 – 12,038 – 45,7 –
WB11283 84 18 44 22 24,502 – 12,038 – 43 –
WB11148.11) 84,5 9,5 35 40 24,502 – 12,038 – 34 –
WB010772) 91 35 6 50 20,004 – – – – –
WB11042.1 91,5 18 51,5 22 24,502 – 15,002 – 50,5 –
WB11130 96,5 22 49,5 25 24,5 – 15,002 – 47,5 –
WB011811) 101 22 17 62 20,004 – – – – –
WB11264 110 24 44 42 20,002 – 12,038 – 40,3 –
WB111481) 114 19 55 40 24,502 – 12,038 – 53 –
WB21289 117,5 23,5 51 43 24,5 20,002 15,002 23 47,8 –
WB21116 117,5 24 51,5 42 24,5 20,002 15,002 23 47,8 –
WB212191) 129,7 32,9 62,8 34 24,5 – 12,038 23,2 60 –
WB21053 135,2 25 48,2 62 20,004 15,944 15,002 8 41 –

1) Special shaft
2) Flinger sleeve