LSF211-2F 4-Bolt Flange Bearing, Double Set Screws, Double 2F Mud-Proof Seals

LSF211-2F square four-bolt cast iron flange bearing unit, matched with SU211-2F double set screw insert bearing. Double-sided 2F composite seal adopts metal flinger + NBR lip two-stage barrier to block mud, crop debris and cooling water splashes. Two symmetric M10 set screws clamp inner ring evenly, stable for frequent forward & reverse rotation under heavy vibration. Spherical outer ring offers ±2.5° self-alignment to compensate shaft assembly offset. Side grease nipple supports periodic re-lubrication. Widely used for grain harvesters, heavy conveyors, grain sorting, food packaging and textile transmission rollers.
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• Dual 2F anti-fouling sealing system: Outer metal flinger throws mud clumps via centrifugal force; inner rubber lip blocks fine dust and mist, much better anti-mud performance than single 2S rubber seals.
• Double symmetric set screws deliver uniform circumferential clamping force, anti-loose under long vibration, no shaft scratch, perfect for bidirectional rotation equipment.
• HT200 grey cast iron square flange housing, high rigidity, quick bolt mounting & disassembly, compact size saves equipment layout space.
• ±2.5° self-aligning spherical outer ring eliminates assembly stress, reduces abnormal wear and running noise.
• Reserved grease fitting for regular lubrication, extend service life and cut maintenance downtime.
• GCr15 fully quenched bearing steel, stable heavy radial load capacity, good wear & impact resistance for long-hour heavy-duty running.
• Standard unified metric dimensions, fully interchangeable with single-seal LSF211 for direct mud-proof upgrade.

Cut maintenance cost and ensure stable operation of heavy farm & industrial machines

• Large grain harvesters & rotary tillers
• Heavy-duty belt conveyors, grain drying & sorting lines
• Feed & food packaging machinery, textile heavy transmission rollers
• Dusty, humid, muddy indoor and semi-outdoor production equipment

Dimension drawings and spec sheets available on request

• 25+ years professional manufacturer of 2F sealed double set screw four-bolt flange bearing units.
• Every batch passes mud resistance aging, vibration endurance and heavy load durability tests before delivery.
• Support OEM custom anti-rust coating, housing paint and sealing upgrade schemes.
• Fast formal quotation and one-on-one professional installation technical support within 24h for all RFQs.
• Stable mass production capacity to meet long-term bulk order demands from global machinery manufacturers.

Factory direct price, consistent quality and on-time batch delivery for overseas buyers

• Raw bearing steel hardness & composition inspection
• High-precision raceway grinding roughness test
• 2F double composite seal mud splash cycle aging test
• Double set screw anti-slip vibration impact test
• Low-noise continuous rotation heavy load performance test
• Full dimension sorting & 100% visual appearance inspection before packing

All LSF 211 2F bearing units pass multi-process strict quality inspection before shipment