NA 6904 bearing is a complete unit consisting of a machined outer ring, a needle roller and cage assembly, and a separable inner ring. It has a space-saving structure due to its small section height.
NA 6904 bearing has large carrying capacity and are suitable for supporting structures with restricted installation dimensions. The journal surface is hardened as the rolling surface. The bearing is fitted into the seat hole with a press fit, eliminating the need for axial positioning. Bearings should be filled with a proper amount of grease before installation. Under normal circumstances, the bearings do not need to be lubricated after assembly.
INA na 6904 bearing details:
|d||20 mm||Bore diameter|
|D||37 mm||Outside diameter|
|Cr||40,500 N||Basic dynamic load rating, radial|
|C0r||51,000 N||Basic static load rating, radial|
|Cur||9,200 N||Fatigue load limit, radial|
|nG||16,900 1/min||Limiting speed|
|nG Grease||10,100 1/min||Limiting speed for grease lubrication|
|nϑr||8,900 1/min||Reference speed|
|rmin||0.3 mm||Minimum chamfer dimension|
|F||25 mm||Raceway diameter inner ring|
|s||1 mm||Axial displacement|
|Tmin||-30 °C||Operating temperature min.|
|Tmax||120 °C||Operating temperature max.|
INA NA 6904 bearing picture
NA 6904 bearing application:
Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Retail, Construction works , Energy & Mining etc
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