SSA209-28 Agricultural Insert Ball Bearing with Eccentric Locking Collar ── 1-3/4" x 85mm x 43.7mm (1-3/4" Bore) | Heavy-Duty Sealed Narrow Inner Ring Unit | Replaces Fafnir RA112RRB GRA112RRB, SKF YET209-112W RA209-112, NTN AEL209-112, AMI KH209-28, Link-Belt W228EL WG228EL
Precision-engineered for heavy-duty agricultural machinery, combine harvesters, grain elevators, industrial conveyors, and power transmission shafts, the SSA209-28 heavy-duty insert ball bearing with eccentric locking collar features exact physical dimensions of 1-3/4" Shaft Bore (44.45mm) x 85mm Spherical Outer Diameter (3.346") x 43.7mm Overall Width/Thickness with Collar (1.720"). Designed with a narrow inner ring, spherical OD for automatic self-alignment, positive eccentric shaft locking system, and heavy-duty contact seals, pre-packed with wide-temperature synthetic grease to completely lock out mud, moisture, crop dust, and soil grit under severe field torque. Direct cross-reference replacement for Fafnir / Torrington RA112RRB / GRA112RRB, SKF YET209-112W / RA209-112, NTN AEL209-112, AMI KH209-28, and Link-Belt W228EL / WG228EL.
✦ Technical Specifications & Brand Interchange Matrix
Bearing Part Number: SSA209-28 / RA112RRB (Heavy-Duty Insert Bearing with Eccentric Collar)
Precise Physical Dimensions:
Inner Diameter (Shaft Bore - d): 1-3/4 in (44.45 mm)
Spherical Outer Diameter (OD - D): 85 mm (3.346 in)
Overall Width / Thickness with Collar (B): 43.7 mm (1.720 in)
Major Brand Cross-References:
Fafnir / Torrington: RA112RRB, GRA112RRB
SKF: YET209-112W, RA209-112
NTN: AEL209-112
AMI: KH209-28
Link-Belt / Rexnord: W228EL, WG228EL
⚡ Structural Advantages & Heavy-Duty Performance
Positive Eccentric Collar Locking Mechanism: Features a self-tightening eccentric collar that locks firmly to the drive shaft in the direction of rotation, preventing shaft slippage and fretting corrosion under heavy shock loading.
Spherical Outer Ring Self-Alignment: Precision-ground spherical outer ring compensates for initial housing misalignments and dynamic shaft deflection during intense field operations.
Heavy-Duty Contact Rubber Sealing: High-efficiency contact seals form an airtight defensive barrier against moisture, mud, agricultural slurry, and abrasive crop dust.
Maintenance-Free Synthetic Pre-Lubrication: Factory pre-filled with wide-temperature agricultural synthetic grease, completely eliminating daily field servicing and lubricant washout.
🚜 Agricultural & Industrial Machinery Deployment
Combine Harvesters & Balers: Direct fit insert bearing for shaft drive lines, augers, reel drives, and crop processing rollers in major combine and baler fleets.
Conveyors & Grain Elevators: Essential heavy-duty bearing unit for bucket elevators, grain augers, crop conveyors, and material handling systems requiring a 1-3/4" bore unit.
Industrial Fan & Drive Assemblies: Ideal for industrial fans, blowers, agricultural gearboxes, and line shaft applications operating under continuous field torque.
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