21304 Bearing
Spherical roller bearing
- Bore d20 mm
- Outer dia. D52 mm
- Width B15 mm
- Weight≈ 0.16 kg
Heavy loads and misalignment: conveyors, crushers, vibrating screens, mining and marine equipment.
Technical data
| Bearing designation | 21304 |
|---|---|
| Type | Spherical roller bearing |
| Bore d | 20 mm |
| Outer dia. D | 52 mm |
| Width B | 15 mm |
| Weight | ≈ 0.16 kg |
Dimensions are standard catalogue values; the weight is an approximate calculation. Please confirm before ordering.
Common suffixes for 21304
| 21304 E | Reinforced internal design (higher load capacity) |
|---|---|
| 21304 EK | Reinforced internal design (higher load capacity) · Tapered bore, taper 1:12 |
| 21304 CC | Spherical roller internal design (symmetrical rollers, steel cage) |
| 21304 CCK | Spherical roller internal design (symmetrical rollers, steel cage) · Tapered bore, taper 1:12 |
| 21304 CA | Spherical roller internal design (brass cage) |
| 21304 CAK | Spherical roller internal design (brass cage) · Tapered bore, taper 1:12 |
| 21304 CC W33 C3 | CC internal design; lubrication groove and holes in the outer ring (W33) · Radial clearance larger than normal (for higher operating temperatures) |
| 21304 CAK W33 C3 | Spherical roller internal design (brass cage) · Tapered bore, taper 1:12 · Lubrication groove and 3 lubrication holes in the outer ring · Radial clearance larger than normal (for higher operating temperatures) |
| 21304 E C3 | Reinforced internal design (higher load capacity) · 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)
20 × 52 × 7 mm
Seal weight: ≈ 0.017 kg
Other common widths: 20 × 52 × 10 mm
The seal's inner diameter matches the shaft (20 mm) and its outer diameter matches the housing bore (52 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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