203JD Agricultural Ball Bearing ── 17mm x 40mm x 14mm (0.669" Bore) | Heavy-Duty Sealed Planter & Disc Unit | Fits John Deere AA34132 AA35638, Case IH ST620 1969300C, Replaces Timken 203K 203KYP2, BCA 5X0366LUL

⚡ Technical Specifications & OEM Interchange Matrix

• Bearing Part Number: 203JD (Heavy-Duty Agricultural Sealed Unit)

• Precise Physical Dimensions:

  • Inner Diameter (Bore - d): 17 mm (0.669 in)

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

  • Width (B): 14 mm (0.551 in)

• OEM Equipment Replacements:

  • John Deere OEM: AA34132, AA35638

  • IHC / Case IH OEM: ST620, 1969300C, 80437C91

• Brand Interchange Cross-Reference:

  • Fafnir / Timken: 203K, 203KYP2

  • BCA / Federal Mogul: 5X0366LUL

💎 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 operation.

• Heavy-Duty Contact Rubber Sealing: Advanced multi-lip rubber contact seals form a solid barrier against moisture, mud, abrasive soil grit, and crop dust contamination.

• High-Precision Chrome Steel Construction: Manufactured from premium vacuum-degassed GCr15 chrome steel (AISI 52100) for maximum dynamic load rating and superior fatigue resistance.

• Exact OEM Fitment: Engineered to standard metric 17x40x14mm tolerances, ensuring smooth rotational performance and easy replacement on original shaft assemblies.

🚜 Agricultural Machinery Deployment & Usage Scenarios

• John Deere & Case IH Equipment: Direct fit replacement unit for John Deere planters, seed openers, gauge wheels, press wheels, and Case IH tillage drive systems.

• Planters & Seeders: Essential replacement component for agricultural row crop planters, seed metering units, and drill machinery.

• General Tillage & Farm Implements: Ideal for various agricultural machinery drive shafts, idler pulleys, and rotary attachments requiring a 17mm bore bearing.