1. Basic Dimensions (mm)

• Bore diameter d: 20 mm
• Bearing outer diameter D: 47 mm
• Inner ring width B: 31 mm
• Flange: Diamond shape with 3 mounting holes, hole diameter Φ8
• Housing material: Cast iron with white anti-corrosion coating 
• Insert bearing material: GCr15 bearing steel
• Total unit weight: ≈0.55 kg

2. Load & Speed

• Basic dynamic load rating C: 12.7 kN
• Basic static load rating C₀: 6.7 kN
• Limiting speed (grease lubrication): 6500 r/min
• Locking type: Set screw locking on inner ring

3.Advantages

1. Easy installation: 3-hole diamond flange, can be bolted directly to equipment side plates without extra brackets.
2. Self-aligning capability: Spherical outer ring compensates for minor shaft misalignment, lowering alignment difficulty during installation.
3. Built-in sealing: Double-sided seals on UC bearing, dustproof & waterproof, pre-greased for immediate use.
4. Anti-corrosion coating (white version in picture): White painted rust protection, suitable for humid environments and food workshops.
5. Simple maintenance: Equipped with grease nipple for re-lubrication to extend service life.
6. Compact structure: Takes less space than pillow block bearings, perfect for confined mounting positions.

UCFB204 (FB204) 3-bolt diamond flange mounted bearing unit, bore 20mm, GCr15 insert bearing, white anti-corrosion cast iron housing, self-aligning, set screw locking, dustproof sealed. Widely used in food conveyor, agricultural machinery, packaging and textile equipment. Compact side mounting design, easy installation and maintenance.