NU321 Bearing
Cylindrical roller bearing
- Bore d105 mm
- Outer dia. D225 mm
- Width B49 mm
- Weight≈ 9 kg
High radial loads: gearboxes, rolling mills, large electric motors.
Technical data
| Bearing designation | NU321 |
|---|---|
| Type | Cylindrical roller bearing |
| Bore d | 105 mm |
| Outer dia. D | 225 mm |
| Width B | 49 mm |
| Weight | ≈ 9 kg |
Designation meaning and notes
- NU: two ribs on the outer ring, inner ring without ribs; the shaft can move axially.
Dimensions are standard catalogue values; the weight is an approximate calculation. Please confirm before ordering.
Common suffixes for NU321
| NU321 E | Reinforced internal design (higher load capacity) |
|---|---|
| NU321 ECP | Reinforced internal design, polyamide cage |
| NU321 ECJ | Reinforced internal design, pressed steel cage |
| NU321 ECM | Reinforced internal design, brass cage |
| NU321 EM | Reinforced internal design, brass cage |
| NU321 M | Machined brass cage |
| NU321 E C3 | Reinforced internal design (higher load capacity) · Radial clearance larger than normal (for higher operating temperatures) |
| NU321 EM C3 | Reinforced internal design, brass cage · Radial clearance larger than normal (for higher operating temperatures) |
Click a designation to open it in the bearing finder. Suffix usage can differ slightly between brands.
Matching seal (radial shaft seal)
105 × 225 × 15 mm
Seal weight: ≈ 0.46 kg
Other common widths: 105 × 225 × 12 mm, 105 × 225 × 20 mm
The seal's inner diameter matches the shaft (105 mm) and its outer diameter matches the housing bore (225 mm); the width depends on the space in the housing. NBR (double lip, TC type) is recommended for general use and FKM (Viton) for high temperatures.
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