Timken NU design · catalog page 76
NU228EMA
Exact single-row metric cylindrical roller bearing record from Timken's July 2025 catalog.
Published bearing data
Dimensions and ratings
- Design
- NU
- Roller-path diameter F/E
- 169 mm
- Static load rating C0
- 526 kN
- Dynamic load rating C1
- 443 kN
- Oil thermal speed
- 2,900 rpm
- Grease thermal speed
- 2,500 rpm
- Weight
- 9.2 kg
- Axial displacement s
- 2.1 mm
- Shaft backing diameter
- 162.4 mm
- Housing backing diameter
- 225 mm
- Geometry factor Cg
- 0.124
- Published row text
- 140.000 250.000 42.000 169.000 526 443 NU228EMA 3.0 3.0 162.4 225.0 2.1 0.124 2900 2500 9.20
Verification boundary
What still needs to match
Internal clearanceTimken notes that radial internal clearance must be included when ordering the complete assembly.
Fits and tolerancesConfirm shaft/housing fits, backing diameters, chamfers, and applicable tolerance class.
Design and cageMatch the N/NJ/NU/NUP arrangement and exact suffix rather than relying only on boundary dimensions.
Operating conditionsCheck load direction, lubrication, speed, temperature, contamination, and axial displacement requirements.
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