SSA207-21 Eccentric Locking Collar Insert Ball Bearing (1-5/16" Bore) ── 1-5/16" x 72mm x 38.9mm (1-5/16x72x38.9mm) | Heavy-Duty Agricultural & Industrial Drive Bearing | Replaces Fafnir RA105RRB, SKF YET207-105 RA207-105, NTN AEL207-105, AMI KH207-21, Link-Belt L21E
Precision-engineered for high-load agricultural implements, crop harvesting machinery, power transmission shafts, and industrial conveyor drive units, the SSA207-21 heavy-duty eccentric locking collar insert ball bearing features exact physical dimensions of 1-5/16" Shaft/Bore (33.338mm) x 72mm Outer Diameter (2.835") x 38.9mm Inner Ring Width/Thickness (1.531"). Built with a narrow inner ring profile, eccentric locking collar mechanism, spherical outer ring, and dual heavy-duty contact rubber seals, pre-packed with wide-temperature synthetic grease to lock out mud, soil grit, crop dust, and moisture under intense shaft rotation. Direct cross-reference replacement for Fafnir / Torrington RA105RRB, SKF YET207-105 / RA207-105, NTN AEL207-105, AMI KH207-21, and Link-Belt L21E.
⚙️ Technical Specifications & Brand Interchange Matrix
Bearing Part Number: SSA207-21 / RA105RRB / AEL207-105 (Eccentric Locking Collar Insert Bearing)
Precise Physical Dimensions:
Inner Diameter (Shaft Bore - d): 1-5/16 in (33.338 mm)
Outer Diameter (OD - D): 72 mm (2.835 in)
Inner Ring Width / Thickness (B): 38.9 mm (1.531 in)
Major Brand Cross-References:
Fafnir / Torrington: RA105RRB
SKF: YET207-105 / RA207-105
NTN: AEL207-105
AMI: KH207-21
Link-Belt: L21E
⚡ Structural Advantages & Heavy-Duty Performance
Eccentric Locking Collar Mechanism: Positive shaft locking action using an eccentric collar that tightens in the direction of rotation, preventing shaft slipping, fretting, and operational looseness.
Spherical Outer Ring Alignment: Self-aligning outer ring profile compensates for initial shaft deflection or housing mounting misalignments without inducing edge stress.
Heavy-Duty Dirt & Dust Sealing: High-efficiency contact rubber seals create a solid barrier against dry crop dust, straw debris, damp field slurry, and abrasive soil grit.
Maintenance-Free Pre-Lubrication: Pre-filled at the factory with high-grade wide-temperature agricultural synthetic grease, eliminating routine field servicing downtime and lubricant washout.
🚜 Agricultural & Industrial Machinery Deployment
Agricultural Harvesting & Tillage: Direct fit replacement insert bearing for combines, balers, grain augers, disk harrows, and mower conditioners requiring a 1-5/16" bore bearing.
Conveyor & Industrial Drives: Essential heavy-duty bearing unit for agricultural conveyor pulleys, material handling machinery, speed reducers, and power transmission shafts.
Severe Duty Power Transmission: Designed for demanding machinery operating under heavy shaft torque, continuous field vibration, and dust-heavy environments.
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