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Fafnir2MM205WI-DULAngular Contact Ball Bearing — 25 mm ID, 52 mm OD, 15 mm Width, 15° Contact Angle, Light Preload, Phenolic Cage, ABEC 7/9

Condition: New

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2 in stock

Super-precision angular contact ball bearing, 25 x 52 x 15 mm, 15-degree contact angle, ABEC 7/9. Matched duplex set, light preload, phenolic cage.

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$145.11

2 in stock

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Specifications

Key Specifications

MFR / BrandFafnir
MPN2MM205WI-DUL
GTIN087796070141
Model2MM 205 WI DUL / B 7205 C T P4 DUL
Bearing TypeAngular Contact Ball Bearing, Open
ID25 mm
OD52 mm
Width15 mm

Technical Specifications

MaterialHigh Carbon Chrome Steel
Series2MM
LubricantOil
PreloadLight Preload
Base Number205
Total Width30 mm
Materials Sourced FromUnited States
Bore Shaft Size25 mm
Mpn Variants2MM205WI-DUL, 2MM-205-WI-CR-DUL, 2MM 205 WI DUL, 7205C, 7205-C
Manufacturer StatusActive
Arrangement ConfigurationDuplex, universally ground (DUL)
Precision ClassABEC 7/9 (ISO P4S)
Dynamic Load Rating C118400 N (4130 lbf) per bearing
Additional AttributesShaft backing shoulder diameter 30.9 mm (1.220 in); housing backing shoulder diameter 47.1 mm (1.860 in); maximum shaft fillet radius 1 mm (0.039 in); outer ring to-clear radius 1 mm (0.039 in); ISO method dynamic rating per row 16700 N (3760 lbf)
Cage TypeCR – Phenolic Outer Land Riding Cage
Dynamic Load Rating18400 N (4130 lbf) per bearing
Static Load Rating10200 N (2320 lbf) per bearing
Precision RatingABEC 7/9 (ISO P4S)
Rolling ElementsBall
Cage MaterialPhenolic
Limiting Speed29800
Number Of Rows1 per bearing
Bore TypeStraight
Snap Ring IncludedNo
Harmonization Code8482.10.50
Contact Angle15°
Design UnitsMetric
Part Number2MM205WICRDUL

Cross-References

Cross Reference 17205C-T-P4S-DUL
Seller Part Number: AO2B5#VPOUXP

Product Description

What this part is

Fafnir 2MM205WICRDUL, a super-precision spindle angular contact ball bearing from Timken’s Fafnir 200WI range. Bore: 25 mm. Outside Diameter: 52 mm. Bearing Width: 15 mm per bearing. Total Width: 30 mm across the set. Contact Angle: 15°. Precision Class: ABEC 7/9 (ISO P4S). Preload: light. Cage Type: CR, phenolic outer land riding. Cage Material: phenolic. Rolling Elements: steel balls. Number of Rows: 1 per bearing. Manufacturer Part Number: 2MM205WI DUL. World Part Number: 7205C-T-P4S-DUL.

Decoding the designation

2MM — Fafnir super-precision spindle execution at a 15° contact angle, ground to ABEC 7/9 (ISO P4S) tolerance.

205 — 200WI dimension series, bore code 05. That is the ISO 7205 envelope: 25 mm bore, 52 mm outside diameter, 15 mm width per bearing.

WI — low shoulder on both rings, which is what allows the ball complement and the 15° angle to be ground into this section.

CR — phenolic outer land riding cage, guided on the outer ring lands.

DUL — duplex, light preload. Two universally ground bearings supplied as a matched set, faces flush-ground so they close to the same preload when clamped.

What these specs mean in practice

Dynamic Radial Load Rating (C1): 18,400 N (4,130 lbf) per bearing. Dynamic Radial Load Rating, ISO method (C1 per row): 16,700 N (3,760 lbf). Static Radial Load Rating (C0): 10,200 N (2,320 lbf) per bearing. Limiting Speed, grease: 29,800 rpm. Limiting Speed, oil: 59,600 rpm.

The 15° contact angle keeps the load path close to radial, and that is what buys the speed: 29,800 rpm on grease and 59,600 rpm under oil from a 25 mm bore. The 25° build on the same envelope trades that away for thrust capacity. The phenolic outer land riding cage is light, so it adds little to ball-set inertia at speed, and the resin holds oil in its own porosity to feed the ball pockets. Light preload fixes the stiffness while keeping the running temperature down.

Quantity and configuration

Unit Quantity: 2 Pcs. A matched duplex set of two universally ground bearings, 30 mm total width when clamped together.

Mounting data

Shaft Backing Shoulder Diameter: 30.9 mm (1.220 in). Housing Backing Shoulder Diameter: 47.1 mm (1.860 in). Maximum Shaft Fillet Radius: 1 mm (0.039 in). Outer Ring To-Clear Radius: 1 mm (0.039 in).

Interchange guidance

Timken’s world part number for this set is 7205C-T-P4S-DUL. Searchable variants of the Fafnir number: 2MM205WI-DUL, 2MM205WICRDUL, 2MM-205-WI-CR-DUL, 2MM 205 WI DUL, 7205C, 7205-C.

The 3MM205WI on the same 25 x 52 x 15 mm envelope is the 25° build: more thrust capacity, lower speed.

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