LYF209 2F Square 4-Bolt Flange Bearing Unit, Eccentric Collar Lock, Double 2F

1. Product Overview

LYF 209 2F four-bolt square grey cast iron flange bearing unit, matched with YEL209-2F eccentric lock insert bearing with double extended inner ring. Double-sided 2F composite seal adopts centrifugal metal flinger + NBR rubber lip two-stage barrier structure. Outer metal flinger throws mud and coarse debris away by centrifugal force; inner rubber lip blocks fine dust, moisture and water mist. Eccentric locking collar tightly clamps double extended inner ring to realize stable single-direction continuous rotation. Spherical outer ring provides ±2.5° self-alignment to compensate shaft installation deflection and misalignment. Dual-layer sealing effectively blocks mud, crop residues, industrial dust and splashing water. Side grease nipple supports periodic re-lubrication, widely used on heavy farm machinery, heavy-duty belt conveyors, packaging and textile heavy transmission equipment.
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2. Key Advantages

• Dual 2F anti-contamination sealing system: Metal flinger repels large mud and debris, inner rubber lip isolates tiny dust and water mist, far superior anti-fouling performance than single 2S rubber seals for muddy semi-outdoor harsh working environments.
• Eccentric lock collar delivers uniform full-circle clamping force, stable anti-loosening under long-term heavy continuous vibration, no scratch damage on shaft surface, specially designed for equipment with fixed single rotation direction.
• HT200 grey cast iron square four-hole flange housing, ultra-high structural rigidity, flat mounting surface for quick bolt fixing, compact overall size saves equipment layout space, easy disassembly for routine maintenance.
• ±2.5° self-aligning spherical outer ring eliminates extra internal stress caused by shaft installation offset, greatly reduces abnormal bearing wear and running noise.
• Reserved side grease fitting enables regular supplementary lubrication, effectively extends bearing service cycle and cuts equipment maintenance downtime.
• GCr15 fully heat-treated bearing steel with stable heavy radial load capacity, outstanding wear resistance and impact resistance.
• Standard unified metric dimensions, fully interchangeable with single-seal LYF209 bearing units for direct heavy mud-proof sealing upgrade.

Reduce maintenance workload and guarantee long-term stable operation of heavy agricultural & industrial machinery

3. Applications

• Heavy rotary tillers, large grain harvesters, grain drying & sorting production lines
• Heavy-duty belt conveyors, large feed processing machinery
• Heavy textile looms, food processing large transmission rollers
• Indoor & semi-outdoor equipment operating in dusty, humid and muddy harsh 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 2F sealed four-bolt square eccentric lock 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 mud 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 meet 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
• 2F double seal mud & 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