203KRR5 Agricultural Bearing ── 13.081mm x 40mm x 12mm (0.515" Bore) | Heavy-Duty Sealed Planter Disc Unit | Fits IHC 611928R91, Allis Chalmers 562134, Tye 522-20SP | Replaces Timken 203KRR5, BCA 203RRAR8, SKF 203-KRR5

◈ Technical Specifications & OEM Interchange Matrix

Bearing Part Number: 203KRR5 / 203RRAR8 (Heavy-Duty Sealed Planter Unit)

Precise Physical Dimensions:

Inner Diameter (Bore - d): 13.081 mm (0.515 in)

Outer Diameter (OD - D): 40 mm (1.575 in)

Width (B): 12 mm (0.472 in)

OEM Equipment Replacements:

International Harvester (IHC) OEM: 611928R91

Allis Chalmers (AC) OEM: 562134

Tye OEM: 522-20SP

Brand Interchange Cross-Reference:

Fafnir / Timken: 203KRR5

BCA / Link-Belt: 203RRAR8

SKF: 203-KRR5

Peer Bearing (SKF): Per.203RRR5-A

⚡ Structural Advantages & Heavy-Duty Performance

Maintenance-Free Sealed Protection: Factory pre-lubricated with high-grade wide-temperature agricultural grease, eliminating daily field greasing while preventing lubricant washout during heavy field operations.

Heavy-Duty Multi-Lip Contact Sealing: Advanced contact rubber seals create a solid barrier against moisture, mud, abrasive soil grit, and fertilizer dust contamination.

Vacuum-Degassed GCr15 Chrome Steel: Manufactured from premium high-carbon chromium steel (AISI 52100) for maximum dynamic load capacity and superior fatigue resistance under continuous field shock.

Precision Bore Alignment: Manufactured to exact 13.081mm (0.515") tolerances for optimal shaft seating, smooth rotation, and minimal fretting corrosion.

🚜 Agricultural Machinery Deployment & Usage Scenarios

IHC, Allis Chalmers & Tye Equipment: Direct fit replacement component for IHC planters, seed openers, Allis Chalmers tillage machinery, and Tye grain drills.

Planters & Seed Drills: Essential replacement bearing for row crop planters, seed openers, gauge wheels, and disc coulter hub assemblies requiring a 0.515" (13.081mm) bore bearing.

General Agricultural Implements: Ideal for various agricultural seeding and tillage drive units requiring heavy-duty sealed protection.