FYH UCFL208J Two-Bolt Oval Flange Mounted Bearing
The FYH UCFL208J is a premium two-bolt oval (diamond-shaped) flange mounted bearing unit from Nippon Pillow Block (FYH), a globally recognized leader in mounted bearing solutions. This integrated assembly combines a UC208 wide inner ring ball bearing insert with set screw locking housed in a robust FL208J one-piece cast iron oval flange housing.
The FYH UCFL208J is a premium two-bolt oval (diamond-shaped) flange mounted bearing unit from Nippon Pillow Block (FYH), a globally recognized leader in mounted bearing solutions. This integrated assembly combines a UC208 wide inner ring ball bearing insert with set screw locking housed in a robust FL208J one-piece cast iron oval flange housing. Engineered for space-efficient installation where mounting area is limited, this unit provides secure shaft support with two-point bolt fixation and features FYH's advanced sealing technology for reliable operation in diverse industrial environments. The "J" suffix indicates the housing has a spherical bore tolerance J, applicable to housing bores up to 100mm, ensuring precise fit and alignment with the bearing insert.
Core Features
- Set Screw Locking Mechanism: Two set screws positioned 120° apart ensure secure attachment to shafts without additional locking devices, simplifying installation and maintenance while preventing fretting wear on shaft surfaces
- Self-Aligning Performance: Spherical outer ring of the bearing insert accommodates up to 2° of initial shaft misalignment, reducing stress concentrations and extending bearing service life
- Dual Protection Sealing System: Nitrile rubber double-lip contact seals with steel slingers effectively retain lubricant while preventing contamination from dust, dirt, and moisture ingress, ensuring reliable operation in harsh environments
- Single-Piece Cast Iron Housing: FL208J housing provides exceptional structural rigidity, vibration damping, and durability for demanding industrial environments
- Relubricatable Design: Features a grease fitting for easy maintenance and extended operational life by allowing fresh lubricant to be added without disassembly
- Wide Temperature Range: Operates reliably from -40°C to 120°C (-40°F to 250°F), suitable for diverse industrial operating conditions
- Light Duty Performance: Optimized for applications with moderate loads and speeds, providing an excellent balance of performance and cost-effectiveness
- Pre-Lubricated: Factory-filled with high-quality FYH Lithium-Bearing Grease for immediate installation and reliable initial operation
Technical Specifications
| Parameter | Metric Value | Imperial Value |
|---|---|---|
| Bearing Unit Number | UCFL208J | UCFL208J |
| Bearing Insert Number | UC208 | UC208 |
| Housing Number | FL208J | FL208J |
| Shaft Diameter (d) | 40.000 mm | 1.5748 in |
| Locking Device | Set Screw (two, positioned 120° apart) | Set Screw (two, positioned 120° apart) |
| Housing Type | Two-Bolt Oval (Diamond) Flange | Two-Bolt Oval (Diamond) Flange |
| Total Length (L) | 175.0 mm | 6.8898 in |
| Mounting Hole Center-to-Center (J) | 144.0 mm | 5.6693 in |
| Flange Assembly Height (H) | 51.2 mm | 2.0157 in |
| Housing Base Thickness (g) | 16.0 mm | 0.6299 in |
| Mounting Bolt Size | M12 | 1/2 in |
| Mounting Hole Diameter (s) | 13.0 mm | 0.5118 in |
| Inner Ring Width (B) | 49.2 mm | 1.9370 in |
| Dynamic Load Rating (Cr) | 29,100 N | 6,542 lbf |
| Static Load Rating (Cor) | 17,800 N | 4,002 lbf |
| Maximum Rotational Speed | 3,750 RPM | 3,750 RPM |
| Operating Temperature Range | -40 to 120 ºC | -40 to 250 ºF |
| Weight | 1.48 kg | 3.2628 lb |
| Seal Type/Material | Double Lip Contact / Nitrile Rubber (NBR) with Steel Slingers | Double Lip Contact / Nitrile Rubber (NBR) with Steel Slingers |
| Housing Material/Construction | Cast Iron (FC250) / One-Piece | Cast Iron (FC250) / One-Piece |
| Performance Classification | Light Duty (2 Series) | Light Duty (2 Series) |
| Lubrication | Pre-filled with FYH Lithium-Bearing Grease / Relubricatable | Pre-filled with FYH Lithium-Bearing Grease / Relubricatable |
| Radial Clearance | Normal | Normal |
| Spherical Bore Tolerance | J (applicable to housing bores up to 100mm) | J (applicable to housing bores up to 3.937in) |
Applications
The FYH UCFL208J two-bolt oval flange bearing is ideally suited for a wide range of industrial applications including:
- Roller conveyors and material handling equipment where mounting area is limited
- Agricultural machinery (augers, balers, and harvesters)
- HVAC systems (industrial fans, blowers, and air handling units)
- Industrial pumps, compressors, and generators
- Packaging and printing machinery
- Food processing equipment (where standard lubrication is acceptable)
- General purpose rotating machinery requiring secure, space-efficient shaft support with two-bolt mounting
This bearing unit delivers a cost-effective, low-maintenance solution for your shaft support needs, backed by FYH's global reputation for precision engineering, quality, and innovation in bearing technology.
