deep groove ball bearing 6904
6904 deep groove ball bearing, inner diameter 20mm outer diameter 37mm thickness 9mm, can be used in general motors, instruments, motors, mechanical equipment, home appliances, reducer, water pump, medical instruments, automobiles, industrial supplies, printing equipment, a wide range of uses, deep groove ball bearing installation method 1: pressing fit: Bearing inner ring and shaft tight fit, outer ring and a bearing hole is a loose fit, press the bearing to be pressed on the shaft are available, and then put the shaft together with the bearing load bearing hole, when pressed on the bearing inner ring end face, cushion the assembling casing made of a soft metal material (copper or mild steel), bearing outer ring and bearing hole tight fit, an inner ring and the shaft is a loose fit, The bearing can be first pressed into the bearing seat hole, then the outer diameter of the assembly sleeve should be slightly less than the diameter of the seat hole. If the bearing ring is tightly matched with the shaft and seat hole, the inner ring and outer ring should be pressed into the shaft and seat hole at the same time. The structure of the assembly sleeve should be able to tighten the end face of the inner ring and outer ring of the bearing at the same time.
Deep groove ball bearing installation method two: heating fit: by heating the bearing or bearing seat, the use of thermal expansion to change the tight fit into a loose fit installation method. Is a common and labor-saving installation method. This method is suitable for the installation of bearings with large interference. Before hot installation, the ring of bearings or separable bearings is put into the oil tank to heat 80-100℃ evenly, and then it is removed from the oil and installed on the shaft as soon as possible. To prevent the end face of the inner ring and the shaft shoulder from fitting tightly after cooling, the bearing can be fastened axially after cooling. When the bearing outer ring is closely matched with the light metal bearing seat, the hot charging method of heating the bearing seat can avoid abrasion on the mating surface. The heating tank with bearing should be at a certain distance from the bottom of a mesh, or hanging hooks in the bearings, bearing on the bottom, in case of heavy impurities into the bearing or uneven heating, the fuel tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ℃, to prevent the tempering effect, reduce the hardness of the ring.


| Boundary Dimensions MM | Designation | Load Rating(KN) Dyn. stat | speed ratings(rpm) | r1 r2 (min) | mounting dimensions MM | Mass (KGS) | ||||||
| d | D | B | Cr | Cor | ng grease | ng oil | da min | Da max | ra max | |||
| 20 | 37 | 9 | 6904 | 6.4 | 3.7 | 19000 | 23000 | 0.3 | 22.2 | 35 | 0.3 | 0.036 |
| 20 | 37 | 9 | 6904 ZZ | 6.4 | 3.7 | 19000 | 23000 | 0.3 | 22.2 | 35 | 0.3 | 0.036 |
| 20 | 37 | 9 | 6904 2RS | 6.4 | 3.7 | 19000 | 23000 | 0.3 | 22.2 | 35 | 0.3 | 0.036 |
Why choose us?
- We continuously invest in research and development to improve our Deep Groove Ball Bearings and stay ahead of the competition.
- We are in line with the concept of 'quality innovation for survival, reputation and efficiency for development' and we use precision deep groove ball bearing 6904, high quality and efficient service to win your trust and support.
- Our success is based on our commitment to excellence, innovation, and customer satisfaction in everything we do.
- We focus on the R&D and manufacturing of deep groove ball bearing 6904, serving customers and brands all over the world since its establishment.
- Our goal is to be a reliable partner for our customers by providing them with the highest-quality Deep Groove Ball Bearings and services.
- We always consider our customers, meet their individual needs, and create products with reliable performance.
- Our aim is to provide the best value for your investment with high-quality Deep Groove Ball Bearings and reliable service.
- Our deep groove ball bearing 6904 have exquisite manufacturing technology and excellent technology. All kinds of products are carefully made according to strict design procedures and scientific technological process.
- Our factory is equipped with state-of-the-art technology to ensure the production of high-quality Deep Groove Ball Bearings.
- We let the employees establish the idea of safety first and prevention first, and enhance the safety awareness and self-protection ability of the employees.
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