LKF209-2F Square 4-Bolt Flange Bearing Unit, Taper Bore + H2309 Sleeve, Double 2F Anti-Mud Seals

LKF 209 2F complete four-bolt square flange bearing unit, integrated with taper bore UK209-2F insert bearing and supporting H2309 adapter sleeve assembly (including KM9 locknut & MB9 lock washer). Double-sided 2F composite seal adopts centrifugal metal flinger + NBR rubber lip two-stage labyrinth barrier. 1:12 taper H2309 sleeve delivers full-circle uniform clamping force for smooth mounting on plain cylindrical shafts without stepped shaft processing. Spherical outer ring provides ±2.5° self-alignment to offset shaft installation deflection and misalignment. Dual-layer sealing effectively blocks mud, crop waste, industrial dust and splashing water. Side grease nipple supports periodic re-lubrication, widely used on heavy agricultural machinery, grain sorting lines, heavy-duty belt conveyors, feed processing and light mining auxiliary equipment.

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• Dual 2F anti-fouling sealing system: Outer metal flinger throws thick mud and large debris away by centrifugal force; inner rubber lip isolates fine dust, moisture and water mist, far better anti-contamination performance than single 2S rubber seals in muddy semi-outdoor working environments.
• H2309 taper sleeve locking structure: Compatible with standard 40mm smooth cylindrical shafts, no complex shaft machining required, easy installation and disassembly; uniform circumferential compression avoids shaft surface scratches, stable anti-slip under continuous vibration and bidirectional rotation.
• HT200 grey cast iron four-hole square flange housing, high structural rigidity, flat mounting surface for quick fixing, compact layout saves equipment assembly space.
• ±2.5° self-aligning spherical outer ring eliminates extra internal stress caused by shaft offset, reduces abnormal bearing wear and low running noise.
• Reserved side grease fitting enables regular supplementary lubrication, extends service life and cuts equipment maintenance downtime.
• GCr15 fully heat-treated bearing steel with stable heavy radial load capacity, excellent wear and impact resistance.
• Standard unified metric dimensions, fully interchangeable with single-seal LKF209+H2309 units for direct heavy mud-proof sealing upgrade.

Lower maintenance frequency and ensure long-term stable operation of heavy farm & industrial equipment

• Heavy rotary tillers, large grain harvesters, grain drying & sorting production lines
• Heavy-duty belt conveyors, feed processing large machinery
• Light mining transport rollers, heavy packaging and textile transmission equipment
• Machinery operating in dusty, humid and muddy outdoor & semi-outdoor harsh environments

Dimension drawings and technical data sheets can be provided upon request

• 25+ years professional manufacturer of taper bore double 2F sealed four-bolt flange bearing & sleeve assemblies
• Products supplied to more than 50 countries worldwide
• Custom OEM anti-rust coating, surface blackening and personalized sealing optimization schemes
• Full pre-delivery inspection covering mud resistance, sleeve locking tightness and load durability test
• Fast formal quotation and one-on-one professional 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

• 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
• H2309 sleeve 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