Fafnir3MM206WIDULSuper-Precision Angular Contact Ball Bearing Matched Pair – Straight Bore, 30 mm ID, 62 mm OD, 16 mm Width, Open, 25° Contact Angle, Light Preload, Machined Phenolic Cage.

Product Description

What this part is: Fafnir 3MM206WI-DUL matched duplex pair of super-precision angular contact ball bearings, 200 series. Brand: Fafnir (Timken). Part Number: 3MM206WI-DUL. Bore: 30 mm. Outside Diameter: 62 mm. Overall Width: 16 mm per bearing. Design Units: Metric. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome bearing steel. Item Weight: 1.00 lbs. Decoding the designation: Contact Angle: 25°. Precision Class: P4S. Precision Rating: ABEC 7/9. Cage Material: Phenolic. Cage Type: Machined, outer-ring land-riding. Preload: Light. Arrangement / Configuration: Matched duplex pair, universally ground. Series: 200, carrying the ISO 7206 envelope. The 3MM prefix marks the 25° super-precision execution and the CR suffix the phenolic outer-ring land-riding cage. What these specs mean in practice: Dynamic Load Rating: 24.9 kN / 5600 lbf. Static Load Rating: 14.0 kN / 3150 lbf. Limiting Speed: 22600 rpm. A 25° contact angle carries more thrust and locates the shaft more stiffly along its axis than a 15° bearing on the same envelope. The light preload class keeps friction and heat generation down, which is what allows the high permissible speed on a 30 mm bore. The machined phenolic cage rides on the outer ring land, staying centred at speed and holding lubricant against the ball pockets. Internal Clearance: N/A — the pair is set by preload rather than by clearance. Quantity and configuration: Unit Quantity: 2 Pcs. Mounting Arrangement: Universal. The two bearings are ground as a matched set, so mounting them against one another produces the light preload class directly, with no shims and no regrinding. Universal grinding also allows a back-to-back, face-to-face or tandem stack. Total Width: 32 mm for the pair as mounted. Interchange guidance: Cross-References: FAG B7206-E-T-P4S-DUL, SKF 7206 ACD/P4ADGB and NSK 7206A5TYNDULP4. Each is a 25° light-preload duplex set on the 30 x 62 x 16 mm envelope; the NSK set carries a polyamide cage rather than phenolic. Harmonization Code: 8482.10.50. Designation variants: MPN Variants: 3MM206WI-DUL, 3MM206WIDUL, 3MM 206 WI DUL, 3MM-206-WI-CR-DUL, 3MM-206-WI-CR-DUL-C1, 7206-A, 7206 A5, 7206AC, 3MM206WI.