Product Description
What this part is
Fafnir 2MM9326WOCR-SUM super-precision angular contact ball bearing. Bore Diameter: 130 mm. Outside Diameter: 180 mm. Overall Width: 24 mm. Contact Angle: 15°. Precision Class: ABEC 7 / P4. The envelope is the ISO 71926 size.
Decoding the designation
2MM — Timken/Fafnir super-precision class. ISO P4 / ABEC 7 running accuracy, with a 15° contact angle.
9326 — the ISO 71926 size: 130 mm bore, 180 mm outside diameter, 24 mm width.
CR — machined phenolic cage.
SUM — universally ground single bearing, medium preload. Any two of the same execution mount as a matched pair back-to-back, face-to-face or in tandem.
What these specs mean in practice
Contact Angle: 15°. A 15° angle favours speed and radial stiffness; a larger angle trades those for axial capacity.
Cage Material: Phenolic. Cage Type: Machined. A phenolic cage is light, self-lubricating and tolerant of high cage speeds.
Preload: Medium. Mounting Arrangement: Universal. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Bearing Material: Bearing Steel. Series: 9300. Harmonization Code: 8482.10.50.
Quantity and configuration
Unit Quantity: 1 Pc.
Interchange guidance
Cross-Reference 3: GMN S61926CTA — the same 130 x 180 x 24 mm envelope at 15° with a machined phenolic cage.