UYF208 2S Square 4-Bolt Flange Bearing Unit, Eccentric Collar Lock, Double 2S Rubber Dust Seals

1. Product Overview

UYF 208 2S four-bolt square cast iron flange bearing unit, matched with YAR208-2S eccentric lock insert bearing with single-side extended inner ring. Double-sided 2S thickened NBR double lip rubber contact seals block fine dust, water vapor and minor debris. Eccentric locking collar tightly clamps the extended inner ring for stable one-way continuous rotation. Spherical outer ring provides ±2.5° self-alignment to offset shaft assembly misalignment. Pre-filled high-temperature long-life grease, side grease nipple supports periodic re-lubrication. Widely used on heavy agricultural machines, heavy-duty belt conveyors, packaging equipment and textile heavy transmission rollers.
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2. Key Advantages

• Dual 2S double-layer rubber lip seals form dual dust-proof barrier, effectively reduce grease leakage and extend bearing service cycle
• Eccentric locking collar delivers uniform full-circle clamping force, stable anti-loosening under heavy continuous vibration, no shaft surface scratches
• HT200 grey cast iron square four-bolt flange housing, high structural rigidity, flat mounting surface for quick installation and disassembly
• Spherical outer ring automatically compensates shaft installation offset, eliminates extra internal stress and lowers running wear & noise
• Side grease fitting enables regular supplementary lubrication for long-hour non-stop heavy load operation
• GCr15 fully quenched bearing steel with stable heavy radial load capacity, compact footprint to save equipment layout space
• Standard 40×80mm metric unified dimensions, fully interchangeable with single-seal UYF208 units for direct sealing upgrade

Lower maintenance frequency and ensure stable continuous operation of heavy machinery

3. Applications

• Heavy rotary tillers, large grain sorting devices, large lawn maintenance machinery
• Heavy-duty belt conveyors, large packaging production assembly lines
• Heavy textile looms, food processing heavy transmission rollers
• Indoor & semi-outdoor equipment with dusty, humid working environments

4. Technical Specifications

Dimension drawings and technical data sheets can be provided upon request

5. Why Choose GQZ Bearing

• 25+ years professional manufacturer of double sealed eccentric lock four-bolt flange bearing units
• Products supplied to more than 50 countries worldwide
• Custom OEM anti-rust coating, surface paint and personalized sealing optimization schemes
• Full pre-delivery inspection covering dust resistance, locking tightness and load durability test
• Fast formal quotation and one-on-one professional heavy-duty bearing technical support within 24 hours for all RFQs
• Stable mass production supply chain to fulfill long-term bulk order demands

We supply consistent stable quality, on-time delivery and long-term win-win cooperation with global buyers

6. Quality Assurance

• Raw bearing steel chemical composition and hardness inspection
• High-precision raceway grinding and surface roughness detection
• Double rubber seal dust resistance cycle aging durability test
• Eccentric collar anti-slip vibration impact test
• Dynamic load and low-noise continuous rotation performance test
• Full dimension sorting and 100% visual appearance inspection before packaging

All bearing units pass multi-process strict quality testing before shipment

7. CTA

8. FAQ