Unità cuscinetto a sfere021SYF20
SUPPORTO SKF SYF 20TF
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 threads for attachment bolts and is suitable for applications with both constant and alternating directions of rotation. It has an inner ring extended on both sides and is locked onto the shaft by tightening a set screw on the inner ring, making it easy to mount.
- Strong
- Ready to mount
- Designed for a constant and alternating rotation
- Lubricated and sealed bearing
- High degree of stiffness
- Narrow design
Key data
Unità cuscinetto a sfere- Shaft diameter
- 20mm
- Basic dynamic load rating
- 12.7kN
- Fatigue load limit
- 0.28kN
- Shoulder diameter inner ring ≈
- 28.2mm
- Limiting speed
- 8,500r/min
- Basic static load rating
- 6.55kN
Item details
- Item
- 021SYF20
- Category
- A.08
- Unit of measure
- PZ
Technical specifications
44 specifications · highlighted (yellow border): used as catalog filters
| Shaft diameter | 20mm |
|---|---|
| Centre distance between bolt holes | 50.8 |
| Housing overall width | 32 |
| 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 | 65 |
| 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 |
| Diameter of head sphere of grease fitting | 6.5 |
| Base width | 32 |
| Basic dynamic load rating | 12.7kN |
|---|---|
| Fatigue load limit | 0.28kN |
| Limiting speed | 8,500r/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 SAE-LT |
| Axial position of the housing thread | 2 |
| UNSPSC code | 31171536 |
|---|---|
| EClass code | 23-05-08-02 |
| Compliance with standard | Not standardized |