W208PPB4 Spherical OD Agricultural Insert Bearing, 1.188" Round Straight Bore, Tri-Ply Triple-Lip Anti-Mud Seals

1.Product Overview

W208PPB4 heavy-duty spherical outer diameter agricultural insert bearing, straight round 1.188 inch (30.175 mm) bore, specially engineered for disc harrows, rotary tillers, subsoilers and all soil preparation farm equipment. Equipped with one-piece integrated tri-ply three-lip metal shroud composite seals, forming multi-stage interception barrier against mud, crop straw residue, sand, dust and field water splash. Spherical outer ring provides ±2.5° self-alignment to offset shaft and hub assembly misalignment. Standard relubrication grease hole supports periodic grease replenishment. C3 enlarged internal clearance adapts to high-vibration, shock farm working conditions, pre-filled with anti-wear agricultural special grease for long continuous field operation. Universally matched with stamped steel and cast iron bearing housings for all mainstream tillage machinery hubs.

Get formal quotation within 24 hours

2.Key Advantages

• Integrated Tri-Ply triple-lip shroud sealing system: Outer metal shroud throws off large mud clumps via centrifugal rotation; three layers NBR contact lips block fine sand, dust and water mist, superior anti-contamination performance compared to standard double-layer 2S/2F seals, ideal for extremely muddy field environments.
• Spherical outer ring self-aligning design, automatically compensates installation deflection, eliminates edge stress and premature raceway fatigue wear.
• Short uniform width inner & outer ring structure, compact overall dimension, easy press-fit installation on standard smooth 30.175 mm farm straight shafts, no eccentric collar/taper sleeve required, simplifies disc harrow hub assembly.
• Thickened inner/outer rings and enlarged steel balls, enhanced shock and heavy radial load resistance to withstand impact loads during soil tillage.
• Reserved side grease fitting channel, convenient regular re-lubrication to extend service cycle and cut field maintenance downtime.
• Full quenched GCr15 chrome bearing steel, stable surface hardness, outstanding wear and fatigue resistance under long-hour high-vibration continuous operation.
• Full interchange cross model: DS208TT4, fully compatible with global mainstream agricultural machinery OEM standards for direct replacement.

Reduce field maintenance frequency and guarantee stable long-term rotation for heavy tillage agricultural equipment

3.Applications

• Disc harrow hubs, heavy rotary tillers
• Subsoilers, soil preparation farming machinery
• Fertilizer spreaders, straw choppers
• All dusty, muddy, high-shock semi-outdoor field agricultural equipment

4.Technical Specifications

Dimension drawings and spec sheets available on request

5.Why Choose GQZ Bearing

• 25+ years professional manufacturer of tri-ply sealed agricultural disc harrow insert bearings.
• Every batch passes mud splash aging cycle, continuous vibration shock and heavy load durability tests before delivery.
• Support OEM customized black oxide anti-rust coating, high-temperature food-grade grease and sealing structure optimization.
• Fast formal quotation and one-on-one agricultural machinery installation technical guidance within 24h for all RFQs.
• Stable mass production capacity to meet long-term bulk OEM & global distributor orders.

Factory direct supply price, consistent stable quality and on-time batch shipment for worldwide farm machinery buyers

6.Quality Assurance

• Raw GCr15 steel chemical composition & hardness inspection
• Raceway high-precision grinding surface roughness detection
• Triple-lip tri-ply seal mud cyclic aging durability test
• Continuous vibration heavy load rotation life fatigue test
• Full dimension tolerance sorting & 100% visual appearance inspection before packaging
• Random finished bearing sampling life test before shipment

All W208PPB4 insert bearings pass multi-process strict quality inspection before factory delivery

7.CTA

Request Wholesale Quotation

Looking for factory direct W208PPB4 triple mud-proof spherical OD round bore insert bearings for disc harrow and farm tillage machinery?

Send your bulk inquiry to obtain:

• Complete formal detailed quotation within 24 hours
• Dimension drawings & professional hub press-fit installation guidance
• Custom anti-rust coating and special agricultural grease modification service
• Long-term bulk exclusive factory wholesale price without intermediate markup

Contact us anytime for large-volume OEM cooperation

8.FAQ

Q1: What is the difference between W208PPB4 and W208PPB2?

• W208PPB4: Bore 30.175mm (1.188"), equal narrow width inner/outer ring, compact structure, cross ref DS208TT4
• W208PPB2: Bore 38.113mm (1.5"), wider inner ring, cross ref DS208TT2A

Seal structure are both tri-ply triple-lip anti-mud shroud seals, only bore size and overall width differ for different standard farm shafts.

Q2: What’s the advantage of tri-ply triple-lip seal vs ordinary 2F/2S double seals?

Tri-ply design adds outer metal protective shroud plus three inner rubber contact lips, multi-stage layered interception of mud, sand and water; standard 2F/2S only two-layer protection, W208PPB4 performs better in extreme muddy disc harrow working scenarios.

Q3: Can W208PPB4 replace DS208TT4 directly?

Yes, all bore, outer diameter and width dimensions fully consistent, direct interchange without modifying equipment hubs or shafts.