LSF208 2F Square 4-Bolt Flange Bearing Unit, Double Set Screws, Double 2F Flinger-Rubber Anti-Mud Seals

1. Product Overview

LSF 208 2F square four-bolt cast iron flange bearing assembly, matched with SU208-2F double set screw insert bearing. Equipped with double-sided 2F composite sealing combining metal flinger and NBR rubber lip to achieve two-stage mud and dust isolation. Two symmetric M10 set screws lock inner ring evenly, stable for forward and reverse rotation under heavy continuous vibration. Spherical outer ring provides ±2.5° self-aligning capacity to absorb shaft installation deflection and misalignment. Double-layer sealing effectively blocks mud, crop residues, workshop dust and splashing water. Side grease nipple supports periodic re-lubrication. Widely applied in heavy agricultural machinery, heavy-duty belt conveyors, food packaging equipment and large textile transmission rollers.
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2. Key Advantages

1. Dual 2F anti-fouling sealing system: Outer metal flinger throws off mud and large debris by centrifugal force; inner rubber lip blocks fine dust, moisture and water mist, much better anti-pollution performance than single 2S rubber seals for outdoor muddy working conditions.
2. Double M10 symmetric set screw locking design, uniform circumferential clamping force, anti-loose under long-term heavy vibration, no scratch on shaft surface, applicable to equipment with frequent positive and negative rotation.
3. HT200 grey cast iron square four-hole flange housing, high rigidity, flat mounting surface for quick bolt fixing, compact overall structure to save equipment layout space, easy to disassemble for maintenance.
4. ±2.5° self-aligning spherical outer ring eliminates extra internal stress caused by shaft offset, reduces abnormal bearing wear and running noise.
5. Reserved side grease fitting for periodic supplementary lubrication, extend bearing service life and reduce equipment maintenance downtime.
6. GCr15 fully quenched bearing steel, stable heavy radial load capacity, excellent wear and impact resistance.
7. Standard metric unified dimensions, fully interchangeable with ordinary single-seal LSF208 bearing unit for 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 and 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
• 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, timely 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 and 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