NJ311 Bearing
Cylindrical roller bearing
- Bore d55 mm
- Outer dia. D120 mm
- Width B29 mm
- Weight≈ 1.5 kg
High radial loads: gearboxes, rolling mills, large electric motors.
Technical data
| Bearing designation | NJ311 |
|---|---|
| Type | Cylindrical roller bearing |
| Bore d | 55 mm |
| Outer dia. D | 120 mm |
| Width B | 29 mm |
| Weight | ≈ 1.5 kg |
Designation meaning and notes
- NJ: one rib on the inner ring; carries axial load in one direction.
Dimensions are standard catalogue values; the weight is an approximate calculation. Please confirm before ordering.
Common suffixes for NJ311
| NJ311 E | Reinforced internal design (higher load capacity) |
|---|---|
| NJ311 ECP | Reinforced internal design, polyamide cage |
| NJ311 ECJ | Reinforced internal design, pressed steel cage |
| NJ311 ECM | Reinforced internal design, brass cage |
| NJ311 EM | Reinforced internal design, brass cage |
| NJ311 M | Machined brass cage |
| NJ311 E C3 | Reinforced internal design (higher load capacity) · Radial clearance larger than normal (for higher operating temperatures) |
| NJ311 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)
55 × 120 × 10 mm
Seal weight: ≈ 0.099 kg
Other common widths: 55 × 120 × 8 mm, 55 × 120 × 12 mm
The seal's inner diameter matches the shaft (55 mm) and its outer diameter matches the housing bore (120 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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