Unità cuscinetto a sfere021UCPA204
SUPPORTO SKF UCPA 204/H
Unità cuscinetto a sfere
Description
Short base pillow (plummer) block ball bearing units consist of an insert bearing mounted in a cast iron housing. This variant has threaded holes for attachment bolts and is suitable for applications where the direction of rotation is constant or alternating. It has an inner ring extended on both sides and is locked onto the shaft by tightening two set screws on the inner ring, making it easy to mount. The units are compliant with Japanese Industrial Standards (JIS).
- Optimized for applications where space is limited
- Ready to mount
- Lubricated and sealed bearing
- Quick locking onto the shaft
- Extended inner ring for minimized shaft misalignment
Key data
Unità cuscinetto a sfere- Shaft diameter
- 20mm
- Centre height (pillow block)
- 30.2mm
- Basic dynamic load rating
- 12.7kN
- Fatigue load limit
- 0.28kN
- Shoulder diameter inner ring ≈
- 28.2mm
- Limiting speed
- 6,500r/min
Item details
- Item
- 021UCPA204
- Category
- A.08
- Unit of measure
- PZ
Technical specifications
43 specifications · highlighted (yellow border): used as catalog filters
| Shaft diameter | 20mm |
|---|---|
| Centre height (pillow block) | 30.2mm |
| Centre distance between bolt holes | 52 |
| Housing overall width | 34 |
| Shoulder diameter inner ring ≈ | 28.2mm |
| Width of inner ring | 31mm |
| Hexagonal key size for set screw | 3 |
| Distance from locking device side face to raceway centre | 18.3 |
| Overall length | 76 |
| Distance from locking device side face to thread centre | 4.5 |
| Bore diameter | 20 |
| Bearing width, total | 31 |
| Hexagonal key size for the grease fitting | 7.94 |
| Diameter of head sphere of grease fitting | 6.6 |
| Base width | 34 |
| Basic dynamic load rating | 12.7kN |
|---|---|
| Fatigue load limit | 0.28kN |
| Limiting speed | 6,500r/min |
| Basic static load rating | 6.55kN |
| Recommended tightening torque for set screw | 4 |
| Housing type | Pillow block, short base |
|---|---|
| Material, housing | Cast iron |
| Number of bolt holes for fasteners | 2 |
| Retaining feature, inner ring | Set screws |
| Sealing, unit | Without |
| Grease fitting | With |
| Unit system | Metric |
| Lubricant | Grease |
| Coating | Without |
| Material, bearing | Bearing steel |
| Bore type | Cylindrical |
| Sealing type | Contact, standard |
| Rubber seating ring | Without |
| Note | Limiting speed with shaft tolerance h6 |
| Set screw | M6x0.75 |
| Sealing type, bearing | Contact, standard |
| Purpose specific | For material handling applications |
| Relubrication hole | With |
| Sealing, bearing | Seal and flinger on both sides |
| Fastening bolt hole type | Threaded |
| Thread of grease fitting | 1/4-28 UNF |
| Axial position of the housing thread | 2 |
| Compliance with standard | JIS |
|---|