UCF307-20 4-Bolt Flange Sealed Ball Bearing Unit, 1-1/4 in Bore, Heavy Duty Cast Iron Housing, Wide Inner Ring, Set Screw Lock, 5/8 in Bolt Pattern, 1/8-27 NPT Grease Fitting

Single 4-bolt flange sealed ball bearing UCF307-20
✔️ 1-1/4 in (31.75 mm) bore, 5/8 in (15.88 mm) bolts, cast iron housing

This is a single sealed 4-bolt flange bearing unit for heavy-duty shaft support. Commonly used on conveyors, fans, industrial drives, agricultural equipment and other applications needing a sealed ball bearing with relubrication access.

✅ Model: UCF307-20 (4-bolt flange unit)
✅ Bore: 1-1/4 in (31.75 mm)
✅ Bolt size: 5/8 in (15.88 mm)
✅ Housing: Cast iron, style F307, 4-bolt flange
✅ Insert: Wide inner ring, bearing steel, ball bearing type
✅ Locking: Set screw inner ring
✅ Seal: Contact seal with slinger for improved contamination resistance
✅ Lubrication: 1/8-27 NPT grease fitting, relubricatable
✅ Duty & temp: Heavy duty, rated to 212°F (100°C)

💡 What is a sealed 4-bolt flange ball bearing unit used for in conveyor and shaft support applications? They’re handy when you need a compact, sealed mounting that keeps contaminants out while allowing grease top-up. - Provides secure shaft support and alignment for conveyors, pulleys, fans and drives using a sealed ball bearing. - Works as an alternative to pillow block or linear slide unit mounts when flange mounting is preferred. - Offers greasable maintenance via an 1/8-27 NPT fitting and robust protection with contact seals.