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.

 

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	–
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