NA series truck used size 35*55*20mm NA4907.2RS needle roller bearing
Needle roller bearings are roller bearings with rollers with a high aspect ratio. Needle bearings are used in agricultural and construction equipment, automotive transmissions, small gasoline engines, gear pumps, small appliance and tool motors, alternators and aircraft controls.
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Needle roller bearings are usually grease lubricated, but oil or oil mist lubrication is preferred for heavy duty or high speed applications. Many light duty needle roller bearings never require relubrication, but high loads or high speeds do.
Model: HK., BK. , NK. , NKS.., NA.. , RNA.. , NAO.. , RNAO.. , NKI.. , NKIS..and etc. NA, RNA, TAF, TR, BR , KT...EG , KTV...EG and etc.
Application: Automobile, Motorcycle, Cycle, Electric tool, Spinning machine, Agriculture machine, Industrial sewing machine, Engineering machinery and etc.

Specification
Type | Needle |
---|---|
Bore Size | 5 - 35 mm |
Outside Diameter | 8 - 55 mm |
Brand Name | DKB OR OEM |
Model Number | NA4907 |
Precision Rating | P0 P2 P4 P5 P6 |
Seals Type | open/rs/2rs/zz |
Number of Row | Single Row |
Material | iron Gcrl15 steel |
Clearance | C1/C2/C3/C4/CM |
Lubricating | Graphite,carbon,oilless,PTFE |
Certifications | ISO 9001:2008 |
Application | electric motors, automotive components |
Cage | steel,brass,ceramic |
Size | 35*55*20mm |

Feature
1. High quality raw materials
With world-class high-quality steel and salt bath quenching and hot combing technology, the wear resistance of the material is greatly improved, and the service life characteristics and high core toughness are improved, and the comprehensive durability is improved.
2. Separable interchange
Separate components of the bearings are interchangeable for easy installation, maintenance and disassembly
3. Advanced heat treatment technology
After the outer ring is quenched by advanced salt bath, it has sufficient hardness to ensure sufficient running life and satisfactory load carrying capacity.
4.High precision rolling element
High-precision rolling body is preferred, which improves the rotation accuracy more effectively, and the accuracy level is P5.
Parameter

Shaft | Bearing Designation | Mass | Boundary Dimension | Basic Loading | Limiting | |||||
---|---|---|---|---|---|---|---|---|---|---|
Diameter | Approx | Speed | ||||||||
Current | Original | d | Fw | D | B | Dynamic | Static | Oil | ||
mm | code | code | g | mm | N | rpm | ||||
5 | NA495 | 7 | 5 | 13 | 10 | 2670 | 2350 | 34000 | ||
NA495TN | 7 | 5 | 13 | 10 | 2670 | 2350 | 34000 | |||
6 | NA496 | 9 | 6 | 15 | 10 | 3150 | 3000 | 32000 | ||
7 | NA497 | 12 | 7 | 17 | 10 | 3600 | 3650 | 30000 | ||
8 | NKI8/16 | 8 | 14 | 25 | 16 | 12400 | 11300 | 21500 | ||
NA498 | 16 | 8 | 19 | 11 | 4300 | 3950 | 28000 | |||
9 | NKI9/12 | 16.6 | 9 | 12 | 19 | 12 | 6200 | 7000 | 21700 | |
NA499 | 17 | 9 | 20 | 11 | 4850 | 4900 | 26000 | |||
NKI9/16 | 21.9 | 9 | 19 | 16 | ||||||
10 | NKI10/16 | 27.3 | 10 | 14 | 22 | 16 | 9800 | 10500 | 196500 | |
NA4900 | 4524900 | 21 | 10 | 14 | 22 | 13 | 8000 | 9000 | 23700 | |
NA6900 | 6534900 | 38.4 | 10 | 14 | 22 | 22 | 9000 | 11000 | 23700 | |
12 | NA4901 | 4524901 | 25.1 | 12 | 16 | 24 | 13 | 9000 | 10800 | 20000 |
NKI12/20 | 39 | 12 | 16 | 24 | 20 | 14000 | 18400 | 21000 | ||
NA6901 | 6534901 | 44.5 | 12 | 16 | 24 | 22 | 6000 | 21600 | 20000 | |
NKIS12 | 58 | 12 | 16 | 30 | 16 | 16000 | 17000 | 20000 | ||
NA12*32*15V | 12 | 32 | 15 | |||||||
15 | NKI15/16 | 38 | 15 | 19 | 27 | 16 | 8800 | 12800 | 19100 | |
NKI15/20 | 45.7 | 15 | 19 | 27 | 20 | 12300 | 19000 | 19100 | ||
NA4902 | 4924902 | 32 | 15 | 20 | 28 | 13 | 6400 | 9000 | 18000 | |
NA6902 | 6534902 | 61.6 | 15 | 20 | 28 | 23 | 13100 | 20900 | 18000 | |
NKIS15 | 90 | 15 | 22 | 35 | 20 | 23500 | 24000 | 17000 | ||
NA5902 | 52 | 15 | 20 | 28 | 18 | |||||
NAI53212 | 15 | 32 | 12 | |||||||
74802 | 74802 | 15 | 36 | 25.4 | ||||||
16 | NKIS16 | 16 | 28 | 16 | 13000 | 17400 | 22000 | |||
NA16*36*24 | 16 | 36 | 24 | |||||||
17 | NKI17/16 | 41.4 | 17 | 21 | 29 | 16 | 13000 | 18200 | 20000 | |
NA4903 | 4544903 | 32.8 | 17 | 22 | 30 | 13 | 7000 | 10000 | 17000 | |
NA6903 | 6534903 | 68.2 | 17 | 22 | 30 | 23 | 14400 | 24900 | 17000 | |
NA5903 | 56 | 17 | 22 | 30 | 18 | 15200 | 21700 | 18000 | ||
NA17 | 17 | 37 | 20 | |||||||
20 | NKI20/16 | 48.5 | 20 | 24 | 32 | 16 | 10800 | 17000 | 16700 | |
NA4904 | 4524904 | 70.2 | 20 | 25 | 37 | 17 | 21000 | 25000 | 17000 | |
NKIS20 | 119 | 20 | 28 | 42 | 20 | 28000 | 35500 | 15000 | ||
NA6904 | 6254904 | 20 | 25 | 37 | 30 | 36000 | 51000 | 17000 | ||
NA5904 | 20 | 25 | 37 | 23 |