Fafnir2MM209WI-DULSuper-Precision Angular Contact Ball Bearing Matched Pair – Straight Bore, 45 mm ID, 85 mm OD, 19 mm Width, Open, 15° Contact Angle, Light Preload, Phenolic Cage.

Product Description

What this part is:

Fafnir 2MM209WI-DUL matched duplex pair of super-precision angular contact ball bearings, 200WI spindle series, built by The Timken Company. Two bearings ground as a matched set, universally ground, at light preload. Bore: 45 mm. Outside Diameter: 85 mm. Bearing Width: 19 mm per bearing. Unit Quantity: 2 Pcs.

Decoding the designation:

2MM — 15° contact angle, super-precision execution, ISO P4 (ABEC 7).

209WI — 200WI series on the ISO 7209 envelope, 45 x 85 x 19 mm, with a low shoulder on both rings.

CR — phenolic outer-land-riding cage.

DUL — matched duplex pair, universally ground, at light preload.

Specifications:

Dynamic Radial Load Rating – 1M Revs (C1): 45,200 N (10,200 lbf) per bearing. C1 ISO Dynamic Radial Rating, per row: 41,100 N (9,270 lbf) per bearing. Static Radial Load Rating (C0): 28,800 N (6,470 lbf) per bearing. Limiting Speed – Grease: 17,500 rpm. Limiting Speed – Oil: 35,000 rpm. Contact Angle: 15°. Precision Class: ABEC 7 / P4. Preload: Light. Cage Type: CR – phenolic outer-land-riding. Cage Material: Phenolic. Lubricant: grease or oil. Rolling Elements: Steel balls. Number Of Rows: 1 per bearing. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome bearing steel. Series: 200WI. Base Number: 2MM209WI. World Part Number: 7209C-T-P4S-DUL. Harmonization Code: 8482.10.50.

Dimensions and mounting:

Bore Diameter: 45 mm. Outside Diameter: 85 mm. Bearing Width: 19 mm per bearing. Total Width: 38 mm for the pair. Maximum shaft fillet radius: 1 mm (0.039 in). Maximum housing fillet radius: 1 mm (0.039 in). Shaft Backing Shoulder Diameter: 52.3 mm (2.060 in). Housing Backing Shoulder Diameter: 78.2 mm (3.080 in). Arrangement / Configuration: matched duplex pair, universally ground. Mounting Arrangement: universal.

Compatibility and replacement:

Cross-references: Timken 7209C-T-P4S-DUL; SKF 7209 CD/P4ADGA; NSK 7209CTRDULP4Y; FAG B7209-C-T-P4S-DUL. MPN Variants: 2MM209WI-DUL; 2MM209WIDUL; 2MM 209 WI DUL; 2-MM-209-WI-CR-DUL; 7209C T P4S; 7209-C; 2MM209WI.

Frequently asked questions:

What size is the Fafnir 2MM209WI-DUL?

45 mm bore, 85 mm outside diameter and 19 mm width per bearing, supplied as a matched duplex pair (Unit Quantity: 2 Pcs).

What do 2MM, WI, CR and DUL mean?

2MM is the 15° contact angle super-precision execution (ISO P4, ABEC 7), WI is a low shoulder on both rings, CR is a phenolic outer-land-riding cage, and DUL is a universally ground matched pair at light preload.

What are the load ratings and limiting speeds?

Per bearing: dynamic radial load rating (C1) 45,200 N and static radial load rating (C0) 28,800 N. Limiting speed is 17,500 rpm with grease and 35,000 rpm with oil.