AA59190 Agricultural Ball Bearing (0.631" Bore) ── 16.03mm x 45.23mm x 26mm | Heavy-Duty Sealed Planter Disc Opener & Gauge Wheel Bearing | Fits John Deere AA59190 AA21480 | Replaces 204RY2, 204PY3, DG1645-2RS

✦ Technical Specifications & OEM / Brand Matrix

Bearing Part Number: AA59190 / AA21480 (Extended Inner Ring Agricultural Bearing)

Precise Physical Dimensions:

Inner Diameter (Bore - d): 16.03 mm (0.631 in)

Outer Diameter (OD - D): 45.23 mm (1.781 in)

Overall Inner Ring Width / Thickness (B): 26 mm (1.024 in)

OEM Equipment Replacements:

John Deere OEM: AA59190, AA21480

Major Industry Cross-References:

Industry Interchanges: 204RY2, 204PY3, DG1645-2RS, 204FREN

⚡ Structural Advantages & Heavy-Duty Performance

Extended 26mm Inner Ring Architecture: Extended inner ring design provides superior shaft seating stability, distributing mechanical clamping pressure to prevent shaft wear, fretting corrosion, and alignment wobble.

Heavy-Duty Contact Rubber Sealing: Multi-lip contact seals create a solid defensive barrier against abrasive dirt, mud, slurry, and fertilizer dust contamination.

Maintenance-Free Synthetic Pre-Lubrication: Factory pre-filled with high-grade wide-temperature agricultural synthetic grease, completely eliminating daily field servicing and lubricant washout.

Vacuum-Degassed GCr15 Chrome Steel: Premium high-carbon chromium steel construction offers elevated dynamic load capacity and maximum resistance against severe operational fatigue.

🚜 Agricultural Machinery Deployment & Usage Scenarios

Planters & Disc Openers: Direct fit replacement for John Deere row crop planters, seed opener disc assemblies, and gauge wheel hubs requiring a 16.03x45.23x26mm bearing.

Grain Drills & Coulters: Essential heavy-duty bearing unit for seed drills, rolling coulters, and soil preparation implements.

High-Speed Seeding Implements: Engineered for demanding agricultural seeding equipment operating under continuous soil resistance, damp field slurry, and heavy dust exposure.