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Fafnir2MM9104WICRDUMSuper-Precision Angular Contact Ball Bearing Pair – 20 mm Bore, 42 mm OD, 12 mm Width, 15°, Medium Preload

Condition: New – Open box
Condition Note: Made In USA, New Old Stock

Availability:

1 in stock

Super-precision angular contact ball bearing duplex pair, 20 x 42 x 12 mm each, 15° contact angle, medium preload, phenolic cage. Fafnir 2MM9104WICRDUM.

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$40.50

1 in stock

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Specifications

Key Specifications

MFR / BrandFafnir
MPN2MM9104WICRDUM
GTIN087796071919
Model2MM 9104 WI DUM / 7004 C P4A DGA / 7004 C TY/TR DUM
Bearing TypeAngular Contact Ball Bearing, Open
ID20 mm
OD42 mm
Width12 mm

Technical Specifications

Series9100WI
LubricantOil
PreloadMedium
Base Number2MM9104WI
Total Width24 mm (pair)
Overall Width12 mm
Mpn Variants2MM9104WIDUM; 2MM-9104-WI-CR-DUM; 2 MM 9104 WI CR DUM; 2MM9104WICRDUM
Precision ClassABEC 7 / P4
Dynamic Load Rating11,600 N (per bearing)
Static Load Rating6,010 N (per bearing)
Rolling ElementsBall
Item Weight0.134 kg (0.30 lb) per pair
Cage MaterialPhenolic
Number Of Rows1
Bore TypeStraight
Snap Ring IncludedNo
Limiting Speed37,100 rpm grease; 74,200 rpm oil
Contact Angle15°
Mounting ArrangementUniversally ground duplex pair

Cross-References

Cross Reference 1FAG B7004-C-T-P4S-UL
Cross Reference 2SKF 7004 CD/P4ADGB
Cross Reference 3NSK 7004CTRDUMP4
Cross Reference 4NTN 7004UCG/GNP4
Cross Reference 5RHP 7004CTDUMP4
Cross Reference 6Koyo 7004C P4 DUM
Cross Reference 7SNFA VEX 20 /NS 7CE1
Cross Reference 87004-C - standard tolerance, no P4S
Seller Part Number: AJ1B3#YODHTQ

Product Description

What this part is:

Fafnir 2MM9104WICRDUM, a super-precision angular contact ball bearing supplied as a universally ground duplex pair. Unit Quantity: 2 Pcs. Bore Diameter: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm per bearing. Total Width: 24 mm mounted as a pair. GTIN: 087796071919.

Decoding the designation:

2MM — Fafnir super-precision spindle range at a 15° contact angle, P4 (ABEC 7) precision class.

9104 — the 9100 light dimension series, bore code 04, which maps to the ISO 7004 envelope: 20 mm bore, 42 mm outside diameter, 12 mm width.

WI — low shoulder on both rings.

CR — phenolic cage.

DUM — duplex pair, universally ground, medium preload. The pair mounts back-to-back, face-to-face or in tandem.

Specifications:

Contact Angle: 15°. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Bore Type: Straight. Closure Type: Open. Cage Material: Phenolic. Precision Class: ABEC 7 / P4. Preload: Medium. Series: 9100WI. Base Number: 2MM9104WI. Dynamic Load Rating: 11,600 N per bearing. Static Load Rating: 6,010 N per bearing. Limiting Speed: 37,100 rpm grease; 74,200 rpm oil. Item Weight: 0.134 kg (0.30 lb) for the pair.

Dimensions and mounting:

Bore Diameter: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm per bearing; 24 mm for the pair. Shaft Backing Shoulder Diameter: 24.8 mm. Housing Backing Shoulder Diameter: 37.7 mm. Maximum Housing Fillet Radius: 0.6 mm (0.024 in).

Compatibility and replacement:

Cross-references on the 7004 envelope at 15° with medium preload: FAG B7004-C-T-P4S-UL, SKF 7004 CD/P4ADGB, NSK 7004CTRDUMP4, NTN 7004UCG/GNP4, RHP 7004CTDUMP4, Koyo 7004C P4 DUM and SNFA VEX 20 /NS 7CE1. A standard-tolerance 7004-C matches the envelope and angle only. MPN Variants: 2MM9104WIDUM, 2MM-9104-WI-CR-DUM, 2 MM 9104 WI CR DUM, 2MM9104WICRDUM.

Frequently asked questions:

What is the Fafnir 2MM9104WICRDUM?

It is a super-precision angular contact ball bearing, 20 x 42 x 12 mm, supplied as a universally ground duplex pair with medium preload and a phenolic cage.

What is the contact angle and speed rating?

The contact angle is 15°. Limiting speed is 37,100 rpm on grease and 74,200 rpm on oil.

What are the load ratings?

Dynamic load rating is 11,600 N and static load rating is 6,010 N, each per bearing.

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