LKF208-2F Square 4-Bolt Flange Bearing Unit, Taper Bore + H2308 Sleeve, Double 2F Anti-Mud Seals

LKF 208 2F complete four-bolt square flange bearing unit, integrated with taper bore UK208-2F insert bearing and supporting H2308 adapter sleeve assembly (including KM8 locknut & MB8 lock washer). Double-sided 2F composite seal adopts centrifugal metal flinger + NBR rubber lip two-stage labyrinth barrier. 1:12 taper H2308 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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1. 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.
2. H2308 taper sleeve locking structure: Compatible with standard 35mm 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.
3. HT200 grey cast iron four-hole square flange housing, high structural rigidity, flat mounting surface for quick fixing, compact layout saves equipment assembly space.
4. ±2.5° self-aligning spherical outer ring eliminates extra internal stress caused by shaft offset, reduces abnormal bearing wear and low running noise.
5. Reserved side grease fitting enables regular supplementary lubrication, extends service life and cuts equipment maintenance downtime.
6. GCr15 fully heat-treated bearing steel with stable heavy radial load capacity, excellent wear and impact resistance.
7. Standard unified metric dimensions, fully interchangeable with single-seal LKF208+H2308 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
• H2308 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