Unità cuscinetto a sfere021UCFB204
SUPPORTO SKF UCFB 204/H
Unità cuscinetto a sfere
Description
These three-bolt bracket flanged ball bearing units are compliant with Japanese Industrial Standards (JIS). They consist of an insert bearing, with an extended inner ring and set screw locking, and are suitable for applications where the direction of rotation is constant or alternating. The bearing is mounted in a cast iron housing, which can be bolted to a machine wall or frame. Ball bearing units can accommodate moderate initial misalignment, but normally do not permit axial displacement.
- Resist high levels of contamination
- Designed for high temperatures and speeds
- Accommodate relatively heavy loads
- Cost-effective
Key data
Unità cuscinetto a sfere- Shaft diameter
- 20mm
- Basic dynamic load rating
- 12.7kN
- Fatigue load limit
- 0.28kN
- Limiting speed
- 6,500r/min
- Basic static load rating
- 6.55kN
- Width, total
- 31.8mm
Item details
- Item
- 021UCFB204
- Category
- A.08
- Unit of measure
- PZ
Technical specifications
52 specifications · highlighted (yellow border): used as catalog filters
| Shaft diameter | 20mm |
|---|---|
| Attachment bolt diameter | 8 |
| Housing overall width | 25.5 |
| Width, total | 31.8mm |
| Outer diameter of inner ring ≈ | 28.2mm |
| Width of inner ring | 31mm |
| Overall width | 31.8 |
| Recommended diameter for attachment bolts, inch | 0.3125 |
| Recommended diameter for attachment bolts, mm | 8 |
| Hexagonal key size for set screw | 3 |
| Distance from locking device side face to raceway centre | 18.3 |
| Diameter of attachment bolt hole | 9.5 |
| Overall length | 64 |
| Overall height | 112 |
| Distance from locking device side face to thread centre | 4.5 |
| Flange width | 8 |
| Width of housing | 25.5 |
| 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 |
| 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 | Flanged |
|---|---|
| Flanged housing type | 3-bolt bracket |
| Material, housing | Cast iron |
| Number of bolt holes for fasteners | 3 |
| Retaining feature, inner ring | Set screws |
| Sealing, unit | Optional end cover |
| 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 | Plain |
| Standout of end cover | 20.5 |
| Thread of grease fitting | 1/4-28 UNF |
| Axial position of the housing thread | 16 |
| Housing thread for grease fitting | 1/4-28 UNF |
| Compliance with standard | JIS |
|---|