SKF H 312 Adapter Sleeve
The SKF H 312 is a metric adapter sleeve (tapered bushing) designed for locating bearings with a tapered bore onto cylindrical shafts. It is a slit sleeve supplied complete with a KM 12 lock nut and MB 12 lock washer, providing a reliable and user-friendly mounting solution that eliminates the need for custom shaft machining or additional components.
The SKF H 312 is a metric adapter sleeve (tapered bushing) designed for locating bearings with a tapered bore onto cylindrical shafts. It is a slit sleeve supplied complete with a KM 12 lock nut and MB 12 lock washer, providing a reliable and user-friendly mounting solution that eliminates the need for custom shaft machining or additional components.
Key Technical Specifications (Metric)
| Parameter | Dimension | Description |
|---|---|---|
| d₁ (Bore diameter) | 55 mm | Inner diameter for shaft mounting |
| d (Outside diameter small taper) | 60 mm | Tapered outer diameter for bearing fitting |
| d₃ (Outside diameter lock nut) | 80 mm | Maximum outer diameter including KM 12 lock nut |
| B₁ (Sleeve width) | 47 mm | Total width of the adapter sleeve |
| B (Lock nut width) | 11 mm | Width of the KM 12 lock nut |
| B₄ (Nut + washer width) | 13 mm | Combined width of lock nut and MB 12 lock washer |
| G (Thread designation) | M60x2 | Metric thread for secure bearing positioning |
| Taper | 1:12 | External taper for proper bearing seating and load distribution |
| Net weight | 0.374 kg | Product weight excluding packaging |
| Oil injection holes | Without | Standard design without lubrication ports |
Included Components
- KM 12 lock nut: Metric thread nut with large contact diameter for secure locking, featuring four equally spaced slots for spanner operation
- MB 12 lock washer: Corresponding locking device that securely engages with the KM 12 nut to prevent unintentional rotation under vibration
Associated Products
- HMV 12E hydraulic nut: Recommended for simplified mounting/dismounting of bearings using hydraulic pressure, reducing installation time and effort while minimizing bearing damage risk
Key Features and Benefits
- Effortless Installation: Slit design allows for simple placement on plain or stepped shafts without additional shaft modifications or keyways
- Complete Assembly: Supplied ready-to-use with matching KM 12 nut and MB 12 washer, ensuring perfect compatibility and minimizing inventory management
- Secure Positioning: Precision 1:12 taper ensures uniform bearing seating, optimal load distribution, and enhanced bearing performance
- Versatile Compatibility: Works seamlessly with a wide range of SKF tapered bore bearings, including 1212K, 2212K, 1312K, 2312K, 21312K, 22212K, and 23212K series
- Cost-Effective Solution: Eliminates the need for expensive custom shaft machining or special adapters, reducing overall system costs
- Reliable Performance: Manufactured to SKF's strict quality standards, ensuring consistent operation and extended service life in demanding industrial environments
Typical Applications
SKF H 312 adapter sleeves are widely used in:
- Electric motors and generators
- Pumps and compressors
- Agricultural machinery components
- Conveyor systems and material handling equipment
- Industrial gearboxes and transmissions
- General machinery requiring bearing mounting on cylindrical shafts
