W211PPB5 Round Bore Agricultural Insert Bearing, Tri-Ply Triple-Lip Heavy Mud-Proof Seals

1. Product Overview

W211PPB5 heavy-duty agricultural spherical OD insert bearing adopts 1-3/8 inch round straight bore, matched to medium-large disc harrows and deep tillage equipment. Double-sided integrated tri-ply triple-lip metal shroud composite seals block mud, crop straw, sand and field water splashes. Spherical outer ring provides ±2.5° self-alignment to compensate shaft and hub assembly offset. Sealed-for-life pre-filled special anti-wear farm grease, no grease fitting for re-lubrication. C3 enlarged internal clearance adapts to long-term high-shock, high-vibration field conditions. Fully interchangeable with DS211TT5, compatible with stamped steel and cast iron housings. Formal quotation will be provided within 24 hours after inquiry.

2. Key Advantages

• Upgraded tri-ply triple-lip sealing system: Outer metal shroud throws large mud clumps via centrifugal force; three anti-aging NBR lips block fine dust and moisture layer by layer, superior anti-fouling effect than standard 2S/2F dual seals for muddy farmland.
• Straight round bore for direct press-fit on standard 1-3/8” smooth farm shafts, no extra locking collars or taper sleeves, simplifying hub assembly.
• Thickened inner/outer rings and enlarged steel balls boost radial load and impact resistance, withstand intense shock during soil breaking.
• Maintenance-free sealed-for-life structure, no regular greasing needed, cut field labor and equipment downtime.
• Fully quenched GCr15 bearing steel with stable hardness, excellent wear and fatigue resistance for non-stop long-hour operation.
• Unified inch & metric standard dimensions, direct replacement for global OEM bearings without modifying equipment hubs.

3. Applications

Medium & heavy disc harrow hubs, deep tillage cultivators, subsoilers, fertilizer spreaders, straw shredders, planting machines and semi-outdoor farm machinery working in dusty, muddy, high-impact environments.

4. Technical Specifications

5. Why Choose GQZ Bearing

25+ years professional agricultural bearing manufacturer specializing in tri-ply sealed disc harrow bearings. All finished batches pass mud aging, vibration shock and heavy load durability tests before delivery. Support OEM custom anti-rust coating, special high-temperature grease and sealing optimization. Fast formal quotation and one-on-one installation technical support within 24h for all RFQs. Stable mass production satisfies long-term bulk OEM and distributor orders worldwide. Factory direct price, stable consistent quality and on-time shipment for global farm machinery buyers.

6. Quality Assurance

Raw material hardness & composition inspection; raceway grinding roughness detection; tri-ply seal mud cycle aging test; continuous vibration heavy load fatigue test; full dimension tolerance sorting; 100% visual inspection before packing; random sampling fatigue test before shipment. All bearings pass multi-process strict inspection.

7. CTA

Send bulk inquiry for W211PPB5 triple mud-proof round bore bearings for heavy tillage machines, you will receive:

1. Complete formal quotation within 24 hours
2. Dimension drawings & round shaft press-fit installation guidance
3. Custom anti-rust coating and special grease service
4. Exclusive long-term bulk factory wholesale price without middle markup

Welcome large-volume OEM cooperation anytime.

8. FAQ

Q1: What’s the advantage of tri-ply triple-lip seal vs ordinary 2F/2S seals?
A1: Tri-ply structure adds outer metal shroud plus three inner rubber lips for multi-layer mud and sand interception; standard 2F/2S only have two protective layers, so tri-ply performs far better in extremely muddy farmland.
Q2: Can W211PPB5 replace DS211TT5 directly?
A2: Yes, all bore, outer diameter and width dimensions are fully consistent, no hub or shaft modification required.
Q3: Does this bearing need regular greasing maintenance?
A3: No, sealed-for-life design without grease hole, periodic lubrication is not required during service life.