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Fafnir2MM9109WICRAngular Contact Ball Bearing – 45 mm ID, 75 mm OD, 16 mm Width, 15° Contact Angle, Open, ABEC 7/9 P4S

Condition: New – Open box
Condition Note: Made In USA

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Super-precision spindle bearing, 15° contact angle, phenolic outer-land-riding cage, ABEC 7/9 P4S, 27 kN dynamic, 17,900 rpm grease, 35,800 rpm oil.

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$43.59

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Specifications

Key Specifications

MFR / BrandFafnir
MPN2MM9109WICR
Model2MM 9109 WI CR
Bearing TypeAngular Contact Ball Bearing, Open
ID45 mm
OD75 mm
Width16 mm

Technical Specifications

MaterialChrome Steel
Series9100
Base Number2MM9109WI
Overall Width16 mm
Mpn Variants2MM9109WICR, 2MM-9109-WI-CR, 2 MM 9109 WI, 7009C-T-P4S
Precision ClassABEC 7 / P4S
Cage TypeCR - Phenolic Outer Land Riding Cage
Dynamic Load Rating27,000 N
Static Load Rating19,300 N
Precision RatingABEC 7 / P4S
Rolling ElementsBall
Cage MaterialPhenolic
Limiting Speed17,900 rpm grease; 35,800 rpm oil
Number Of Rows1
Bore TypeStraight
LubricantGrease or oil
Harmonization Code8482.10.50.28
Contact Angle15°
PreloadZero
Bearing MaterialChrome steel

Cross-References

Cross Reference 1SKF 7009 CD/P4A
Cross Reference 2FAG B7009-C-T-P4S-UL
Cross Reference 3NSK 7009CTYNSULP4
Cross Reference 4NTN 7009UCG/GNP4
Cross Reference 5Timken Fafnir 2MM9109WICR
Cross Reference 6RHP 7009CTSULP4
Cross Reference 7Koyo 7009C/GLP4
Cross Reference 8SNR 7009CVUJ74
Seller Part Number: AA3B1#O70MKZ

Product Description

What this part is

Fafnir 2MM9109WI-CR, a super-precision angular contact ball bearing built by Timken under the Fafnir brand for machine tool spindle service. Bore Diameter: 45 mm. Outside Diameter: 75 mm. Overall Width: 16 mm. Contact Angle: 15°. Precision Class: ABEC 7 / P4S. Cage Type: CR — phenolic outer land riding cage. Cage Material: Phenolic. Rolling Elements: Ball. Bearing Material: Chrome steel. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Preload: Zero.

Decoding the designation

2MM — 15° contact angle on the Fafnir super-precision range, with the MM prefix carrying ISO P4S tolerancing.

9109 — the 9100WI series, which maps to the ISO 70xx light series; this size is the ISO 7009.

WI — low shoulder on both rings, the high-speed spindle execution.

CR — phenolic outer land riding cage, guided on the outer ring land. Timken’s world part number for this execution is 7009C-T-P4S.

What these specs mean in practice

Dynamic Load Rating: 27,000 N. Static Load Rating: 19,300 N. Limiting Speed: 17,900 rpm grease; 35,800 rpm oil. The 15° contact angle favours speed and radial stiffness; a 25° execution on the same envelope trades speed away for axial load capacity. A phenolic cage running on the outer ring land is light and self-lubricating, which is what carries the oil speed figure. Lubricant: grease or oil.

Mounting data

Shaft backing shoulder diameter: 51.3 mm (2.020 in). Housing backing shoulder diameter: 69.3 mm (2.730 in). Series: 9100WI. Base Number: 2MM9109WI.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing, ground to the bare 2MM9109WI-CR execution with zero built-in preload.

Interchange guidance

Direct metric super-precision equivalents at 15° and P4 class: SKF 7009 CD/P4A, FAG B7009-C-T-P4S-UL, NSK 7009CTYNSULP4, NTN 7009UCG/GNP4, RHP 7009CTSULP4, Koyo 7009C/GLP4, SNR 7009CVUJ74. Searchable forms of this number include 2MM9109WICR, 2MM-9109-WI-CR, 2 MM 9109 WI and 7009C-T-P4S.

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