Fafnir3MM308WI SUHSuper-Precision Angular Contact Ball Bearing – Straight Bore, 40 mm ID, 90 mm OD, 23 mm Width, Open, 25° Contact Angle, Heavy Preload, Phenolic Cage.

Product Description

What this part is:

Fafnir 3MM308WICR-SUH is a super-precision angular contact ball bearing of the 300WI series (Fafnir, Timken), single and universally ground, in the ISO 7308 envelope. Bore Diameter: 40 mm. Outside Diameter: 90 mm. Overall Width: 23 mm. Contact Angle: 25°. Preload: Heavy. Precision Class: P4S (ABEC 7/9). Unit Quantity: 1 Pc.

Decoding the designation:

3MM — Fafnir 300 series super-precision spindle bearing, 25° contact angle.

308 — ISO 7308 envelope, 40 x 90 x 23 mm.

WI — Fafnir WI series, 300WI.

CR — phenolic outer land riding cage.

SU — single bearing, universally ground.

H — heavy preload.

Specifications:

Series: 300WI (ISO 73). Design Units: Metric. Number of Rows: 1. Rolling Elements: Steel ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome bearing steel. Cage Material: Phenolic. Cage Type: CR, phenolic outer land riding. Arrangement / Configuration: Single, universally ground. Mounting Arrangement: Universal. Item Weight: 1.40 lbs.

Dynamic Radial Load Rating (C1), per bearing: 57,500 N (12,900 lbf). Dynamic Radial Load Rating (C1 ISO, per row): 52,300 N (11,700 lbf). Static Radial Load Rating (C0), per bearing: 33,800 N (7,600 lbf). Limiting Speed, grease: 15,200 rpm. Limiting Speed, oil: 30,400 rpm.

Dimensions and mounting:

Bore Diameter: 40 mm. Outside Diameter: 90 mm. Overall Width: 23 mm. Total Width: 23 mm. Shaft Backing Shoulder Diameter: 49.3 mm (1.940 in). Housing Backing Shoulder Diameter: 81.3 mm (3.200 in). Maximum Shaft Fillet Radius: 1.5 mm (0.059 in). Outer Ring To Clear Radius: 1.5 mm (0.059 in).

Compatibility and replacement:

SKF 7308 ACD/P4A — 25° angle, 40 x 90 x 23 mm.

FAG B7308-E-T-P4S-UH — 25° angle, P4S class, universal, 40 x 90 x 23 mm.

NSK 7308A5 — 25° angle, 40 x 90 x 23 mm.

Timken 7308E — 25° angle, 40 x 90 x 23 mm.

MPN variants: 3MM308WICR-SUH, 3MM308WICRSUH, 3MM-308-WI-CR-SUH, 3MM308WICRDUH, 3MM-308-WI-CR-DUH, 7308E-T-DUH-P4, 7308A, 7308A5, 7308ACD, 3MM308WI.

Frequently asked questions:

What are the dimensions of the Fafnir 3MM308WICR-SUH?

Bore Diameter: 40 mm. Outside Diameter: 90 mm. Overall Width: 23 mm.

What contact angle and preload does it have?

Contact Angle: 25°. Preload: Heavy.

What load ratings and speed limits apply?

Dynamic Radial Load Rating (C1): 57,500 N per bearing. Static Radial Load Rating (C0): 33,800 N. Limiting Speed: 15,200 rpm grease, 30,400 rpm oil.