Unità cuscinetto a sfere021SYF20FM
SUPPORTI SKF SYF20FM
Unità cuscinetto a sfere
Description
Short base pillow (plummer) block ball bearing units consist of an insert bearing mounted in a cast iron housing that can be bolted to a support surface. This variant is intended for use in applications where the direction of rotation is constant. It has a narrow inner ring and is locked onto the shaft by an eccentric locking collar, making it easy to mount.
- Strong
- Narrow design
- Ready to mount
- Lubricated and sealed bearing
- Designed for rotation in one direction
- Accommodate static initial misalignment
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
- 021SYF20FM
- 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 |
| Hexagonal key size for set screw | 3 |
| Distance from locking device side face to raceway centre | 23.5 |
| Overall length | 65 |
| Distance from locking device side face to thread centre | 4.75 |
| Overall bearing width | 30.5 |
| Bore diameter | 20 |
| Bearing width, total | 30.5 |
| 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 | Eccentric collar |
| 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 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 |