LSF205 2F Square 4-Bolt Flange Bearing Unit, Double Set Screws, Double 2F Flinger-Rubber Anti-Mud Seals

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1. Product Overview

LSF 205 2F four-bolt square grey cast iron flange bearing unit, matched with SU205-2F double set screw insert bearing. Double-sided 2F composite sealing structure combines centrifugal metal flinger and NBR rubber lip for two-stage pollution prevention. Two symmetric M8 set screws evenly lock the inner ring, supporting stable forward and reverse rotation. Spherical outer ring delivers ±2.5° self-alignment to compensate shaft assembly deflection and misalignment. Dual-layer sealing effectively blocks mud, crop residues, workshop dust and splashing water. A side grease nipple enables periodic re-lubrication. Widely applied in medium agricultural machines, medium-duty belt conveyors, packaging lines and textile transmission rollers.
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2. Key Advantages

• Dual 2F anti-contamination sealing system: Outer metal flinger throws mud and coarse debris away via centrifugal force; inner rubber lip isolates fine dust, moisture and water mist, far superior anti-fouling performance than single 2S rubber seals in muddy semi-outdoor working environments.
• Double symmetric M8 set screw locking design, uniform clamping force, stable anti-loosening under medium continuous vibration, compatible with frequent forward-reverse rotation without shaft surface damage.
• HT200 high-rigidity cast iron four-hole square flange housing, flat mounting surface for quick bolt fixing, compact overall size saves equipment layout space, easy disassembly for maintenance.
• ±2.5° self-aligning spherical outer ring eliminates extra internal stress caused by shaft offset, reduces abnormal wear and low running noise.
• Side grease fitting supports regular supplementary lubrication, extends bearing service cycle and cuts equipment downtime for maintenance.
• GCr15 fully heat-treated bearing steel with stable medium radial load capacity, excellent wear and impact resistance.
• Standard unified metric dimensions, fully interchangeable with single-seal LSF205 bearing units for direct heavy mud-proof sealing upgrade.

Lower maintenance frequency and guarantee long-term stable operation of medium-duty farm and industrial machinery

3. Applications

• Medium rotary tillers, grain sorting & drying equipment, lawn maintenance machinery
• Medium-duty belt conveyors, food and general packaging production assembly lines
• Textile looms, light processing transmission rollers
• Indoor and semi-outdoor equipment operating in dusty, humid and slightly muddy 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 set-screw 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, set screw locking tightness and load durability test
• Fast formal quotation and one-on-one professional medium-duty bearing technical support within 24 hours for all RFQs
• Stable mass production supply chain to fulfill long-term bulk order demands

We provide 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
• 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 testing before shipment

7. CTA

8. FAQ