21306 Bearing
Spherical roller bearing
- Bore d30 mm
- Outer dia. D72 mm
- Width B19 mm
- Weight≈ 0.38 kg
Heavy loads and misalignment: conveyors, crushers, vibrating screens, mining and marine equipment.
Technical data
| Bearing designation | 21306 |
|---|---|
| Type | Spherical roller bearing |
| Bore d | 30 mm |
| Outer dia. D | 72 mm |
| Width B | 19 mm |
| Weight | ≈ 0.38 kg |
Dimensions are standard catalogue values; the weight is an approximate calculation. Please confirm before ordering.
Common suffixes for 21306
| 21306 E | Reinforced internal design (higher load capacity) |
|---|---|
| 21306 EK | Reinforced internal design (higher load capacity) · Tapered bore, taper 1:12 |
| 21306 CC | Spherical roller internal design (symmetrical rollers, steel cage) |
| 21306 CCK | Spherical roller internal design (symmetrical rollers, steel cage) · Tapered bore, taper 1:12 |
| 21306 CA | Spherical roller internal design (brass cage) |
| 21306 CAK | Spherical roller internal design (brass cage) · Tapered bore, taper 1:12 |
| 21306 CC W33 C3 | CC internal design; lubrication groove and holes in the outer ring (W33) · Radial clearance larger than normal (for higher operating temperatures) |
| 21306 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) |
| 21306 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)
30 × 72 × 10 mm
Seal weight: ≈ 0.036 kg
Other common widths: 30 × 72 × 8 mm, 30 × 72 × 12 mm
The seal's inner diameter matches the shaft (30 mm) and its outer diameter matches the housing bore (72 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.
Quote for bearing and sealAll seal sizes and matching bearings →
Matching sleeve
H 306 · shaft 25 mm
Adapter sleeve H 306: shaft diameter 25 mm, bearing bore 30 mm, width 31 mm. Used with lock nut KM6 and lock washer MB6.
H 306 set weight (incl. lock nut and lock washer): ≈ 0.11 kg
A sleeve mounts a tapered-bore bearing on a plain cylindrical shaft and bridges the difference between the bearing bore and the shaft diameter.
Use with a sleeve requires the tapered-bore version of the bearing: 21306 K.
Quote for bearing and sleeve