3303 Double Row Angular Contact Ball Bearing ── 17mm x 47mm x 22.2mm (0.669" Bore) | Heavy-Duty Agricultural & Industrial Drive Bearing | Replaces 5303, SKF 3303 A, FAG NTN 3303 B, 3303-2RS

⚙️ Technical Specifications & Brand Interchange Matrix

Bearing Part Number: 3303 / 5303 / 3303-2RS (Heavy-Duty Double Row Bearing)

Precise Physical Dimensions:

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

Outer Diameter (OD - D): 47 mm (1.850 in)

Overall Width / Thickness (B): 22.2 mm (0.874 in)

Industry & Brand Cross-References:

American / Industry Standard: 5303

SKF Standard Designation: 3303 A (No filling slot design)

FAG / NTN Variant Suffixes: 3303 B / 3303-2RS

⚡ Structural Advantages & Heavy-Duty Performance

High-Rigidity Double Row Angular Contact Geometry: High-precision internal ball arrangement provides exceptional mechanical stability capable of handling heavy radial and bi-directional thrust loads simultaneously.

Dual Contact Rubber Sealing System: High-efficiency contact rubber seals form an airtight defensive barrier against moisture, mud, slurry, and abrasive fertilizer dust.

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

Vacuum-Degassed GCr15 Chrome Steel: Premium high-carbon chromium steel construction provides maximum dynamic load capacity and superior fatigue resistance against continuous field torque.

🚜 Agricultural & Industrial Machinery Deployment

Agricultural Implements & Seeders: Direct fit replacement bearing for planter openers, gauge wheels, coulter hubs, and soil conditioning tools requiring a 17x47x22.2mm double-row bearing.

Industrial Gearboxes & Drives: Essential heavy-duty bearing unit for speed reducers, electric motors, hydraulic pumps, and conveyor pulley assemblies.

Severe Duty Power Transmission: Designed for demanding machinery operating under heavy soil drag, wet field slurry, and abrasive dirt exposure.