SKF H 2308 Adapter Sleeve
The SKF H 2308 is a metric adapter sleeve with KM lock nut and MB lock washer from the standard H series, designed for locating bearings with a tapered bore onto a cylindrical shaft seat. It is the most commonly used component for this purpose as it can be installed on plain shafts or stepped shafts, offering flexibility in bearing positioning while ensuring secure mounting and easy installation.
The SKF H 2308 is a metric adapter sleeve with KM lock nut and MB lock washer from the standard H series, designed for locating bearings with a tapered bore onto a cylindrical shaft seat. It is the most commonly used component for this purpose as it can be installed on plain shafts or stepped shafts, offering flexibility in bearing positioning while ensuring secure mounting and easy installation.
Key Features:
- Slit design for easy installation and secure fit on shafts
- Complete with KM lock nut and MB lock washer for reliable locking
- External taper of 1:12 for proper bearing seating
- Metric dimensions with M40x1.5 thread specification
- Suitable for both through-shaft and shaft end mounting arrangements
Technical Specifications
1. Dimensions (Metric & Imperial)
| Dimension | Metric | Imperial | Description |
|---|---|---|---|
| d₁ | 35 mm | 1.378 in | Bore diameter (shaft diameter) |
| d | 40 mm | 1.5748 in | Outside diameter small taper |
| d₃ | 58 mm | 2.2835 in | Outside diameter lock nut |
| B₁ | 46 mm | 1.811 in | Overall width of adapter sleeve |
| B | 9 mm | 0.3543 in | Width of KM lock nut |
| B₄ | 10 mm | 0.3937 in | Width of lock nut including MB lock washer |
| G | M40x1.5 | - | Thread designation |
| Taper | 1:12 | 1:12 | External taper for bearing seating |
2. Included Components
| Component | SKF Part Number | Description |
|---|---|---|
| Lock nut | KM 8 | Metric lock nut with M40x1.5 thread |
| Locking device | MB 8 | Lock washer for securing KM 8 lock nut |
3. Properties & Features
| Property | Specification |
|---|---|
| Product type | Metric adapter sleeve |
| Design | Slit, one-piece construction |
| Holes for oil injection | Without |
| Mounting method | Mechanical (using lock nut) |
| Product net weight | 0.21 kg (0.463 lb) |
| eClass code | 23-11-07-05 |
| UNSPSC code | 31163218 |
4. Associated & Recommended Products
| Product Type | SKF Part Number | Purpose |
|---|---|---|
| Hydraulic nut | HMV 8E | For easier mounting/dismounting of bearings |
| Compatible bearings | 2308K, 2318K, 2408K, 2418K, 2428K, etc. | Bearings with tapered bore (1:12) |
Installation & Operational Information
- Installation Steps:
- Slide the H 2308 adapter sleeve onto the shaft until it reaches the desired position
- Mount the bearing with tapered bore onto the sleeve
- Install the MB 8 lock washer followed by the KM 8 lock nut
- Tighten the lock nut to the recommended torque value for proper bearing seating
- Bend the tabs of the lock washer against the flats of the lock nut to prevent loosening
- Bearing Positioning:
- On plain shafts: The bearing can be located at any position along the shaft
- On stepped shafts: Combine with an L-shaped spacer ring for precise axial positioning
- Key Benefits:
- No need for additional shaft machining beyond standard cylindrical finish
- Allows for easy bearing replacement without removing other components from the shaft
- Provides uniform radial loading and secure bearing retention
Typical Applications
- Industrial Machinery: Pumps, compressors, gearboxes, conveyors, and fans
- Mining & Aggregate: Crushers, screens, and conveyor systems
- Paper & Pulp: Rollers, calenders, and processing equipment
- General Manufacturing: Any rotating equipment requiring secure bearing mounting on cylindrical shafts
