NSK NU228EM bearings
NU228EM, NSK cylindrical roller bearings, machined brass cage
- Measurement system
- Metric
- Bore diameter
- 140.000 mm
- Outside diameter
- 250.000 mm
- Width
- 42.000 mm
- Cr
- 485000 N
- C0r
- 515000 N
- Limiting speed
- 3000 r/min
- Net weight
- 9.21 kg
- Number of rows
- 1
- Sealing
- Without
- Locating feature
- Without
- Cage
- Machined brass
- Bearing material
- Steel
- Rolling material
- Steel
- Tolerance class
- Normal (PN)
- Internal clearance
- CN
- Lubricant in bearing
- None
- Relubrication feature
- Without
- Coating
- Without
In stock
Technical specification for NSK NU228EM
| NSK Designation | NU228EM | |
|---|---|---|
| Boundary Dimensions | ||
| d | 140 mm | Bore diameter |
| D | 250 mm | Outside diameter |
| B | 42 mm | Width |
| FW | 169.0 mm | Raceway diameter of inner ring |
| r (min.) | 3 mm | Chamfer dimension |
| r1 (min.) | 3 mm | Chamfer dimension |
| Basic Load Ratings | ||
| Cr | 485000 N | Basic dynamic load rating |
| C0r | 515000 N | Basic static load rating |
| Speeds | ||
| Thermal Speed Rating (Oil-bath) | 3200 r/min | Oil-bath lubrication subject to conditions outlined in ISO 15312 |
| Grease | 2400 r/min | Grease lubrication |
| Oil (Oil-bath) | 3000 r/min | Oil-bath lubrication |
| Abutment and Fillet Dimensions | ||
| db (min.) | 153.0 mm | Diameter of shaft / spacer sleeve abutment |
| db (max.) | 165 mm | Diameter of shaft / spacer sleeve abutment |
| dc (min.) | 171 mm | Diameter of shaft abutment |
| Da (max.) | 237.0 mm | Diameter of housing abutment |
| ra (max.) | 2.5 mm | Radius of shaft or housing fillet |
| rb (max.) | 2.5 mm | Radius of shaft or housing fillet |
| Mass | ||
| Mass (approx.) | 9.21 kg | |
NSK NU228EM cylindrical roller bearing have a simple structure of cylindrical rollers in linear contact with the raceways. NU228EM offer high load capacity under primarily radial loads. Low friction between the rollers and ring ribs makes these bearings suited for high speed rotation.
NSK NU228EM bearings have two integral flanges on the outer ring and no flanges on the inner ring. They can accommodate axial displacement in both directions. Boundary dimensions: 140 x 250 x 42 mm.
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