LSF210 2F Square 4-Bolt Flange Bearing Unit, Double Set Screws, Double 2F Flinger-Rubber Anti-Mud Seals

1. Product Overview

LSF 210 2F square four-bolt cast iron flange bearing assembly, matched with SU210-2F double set screw insert bearing. Equipped with double-sided 2F composite sealing combining centrifugal metal flinger and NBR rubber lip to realize two-stage mud, dust and splash isolation. Two symmetric M10 set screws lock the inner ring evenly, providing stable clamping force for frequent forward and reverse rotation under continuous heavy vibration. Spherical outer ring delivers ±2.5° self-aligning performance to absorb shaft installation deflection and misalignment. Heavy-duty double-layer sealing effectively blocks field mud, crop debris, workshop dust and cooling water splashes. Side grease nipple supports periodic supplementary lubrication. Widely used on heavy agricultural machinery, heavy-duty belt conveyors, grain sorting equipment, food packaging lines and large textile transmission rollers.

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2. Key Advantages

• Dual 2F anti-fouling sealing system: Outer metal flinger throws off large mud clumps and coarse debris by centrifugal force; inner rubber lip blocks fine dust, moisture and water mist, far superior anti-contamination performance than single 2S rubber seals for muddy outdoor farm working conditions.
• Double symmetric M10 set screw locking design, uniform circumferential clamping force, anti-loosening under long-term heavy vibration, no scratch damage to shaft surface, perfectly suitable for equipment with frequent forward and reverse rotation.
• HT200 grey cast iron square four-hole flange housing, high structural rigidity, flat mounting surface for quick bolt installation, compact overall structure saves equipment layout space, easy disassembly for routine maintenance.
• ±2.5° self-aligning spherical outer ring eliminates extra internal stress caused by shaft offset, reduces abnormal bearing wear and running noise.
• Reserved side grease fitting for regular supplementary lubrication, extend bearing service life and cut equipment maintenance downtime.
• GCr15 fully quenched bearing steel, stable heavy radial load capacity, excellent wear resistance and impact resistance for continuous heavy-load operation.
• Standard unified metric dimensions, fully interchangeable with ordinary single-seal LSF210 bearing unit for direct heavy mud-proof sealing upgrade.

Lower maintenance frequency and ensure long-term stable operation of heavy agricultural and industrial machinery

3. Applications

• Heavy rotary tillers, large grain drying & sorting equipment, large lawn maintenance machines
• Heavy-duty belt conveyors, feed processing equipment, food packaging production lines
• Heavy textile looms, large transmission rollers for light industrial processing
• Indoor and semi-outdoor equipment running 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 square four-bolt set screw flange bearing units
• Products exported to more than 50 countries worldwide
• Support OEM customized anti-rust coating, surface painting and personalized sealing improvement schemes
• Full pre-shipment inspection including mud resistance, set screw locking stability 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 capacity to meet long-term bulk order demands

We supply stable high-quality bearings, 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 testing
• 2F double seal mud & dust resistance cycle aging durability test
• Set screw 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 complete bearing units pass multi-process strict quality inspection before delivery

7. CTA

8. FAQ