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Single Row Ball Bearings - 4 mm x 9 mm x 2.5 mm
684-MC3-AF12

Name: 1054158 | 684-MC3-AF12 --- Single Row Ball Bearings - 4 mm x 9 mm x 2.5 mm
Brand: MBA
SKU: 684MC3AF12
Price: 7.32 AUD
Availability: InStock

MBA

Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel

Additional resources:
Tolerances
Standard Bearings PDF Catalogue
Shafting

Price:

$7.32 AUD

Each
Qty: 53 available now
Order 50 or more for $6.59 AUD Each

More stock due Oct 06, 2025: Qty 100 You may order more than the quantity available. One delivery will be made when all items are ready unless you select for partial delivery at checkout. If you wish to order more than 100, delivery is expected before Oct 06, 2025

Quantity

Base Category: Bearings - Single Row Ball

Top Level Category: Bearings - Single Row Ball - Unflanged - Precision - Chrome Steel

Product Details:

ID (d): 4.000mm
_{+0.000/-0.0075}

SAE52100 Chrome Steel

OD (D): 9.000mm
_{+0.000/-0.0075}
Width (B): 2.500mm
_{+0.000/-0.125}
Precision Grade: Abec 1
Closure Type: Open
Bearing Type: Radial

Brand: MBA
Country of Origin: JP

Alternatives: 618-4, 684, 684-AF2, 684AX50, AX4, BGB-7183, L940, MR4009, UL409, UL40C, W684

We offer equivalents to many brands including Anderton, Barden, Berg, Designatronics, EZO, ISC, Koyo, Myonic, NMB, Nordex, NSK, Ondrives, Reid Industrial, RMB, SDP-SI, Seeger, SKF, and more.

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Miniature Bearings Australia for all types of small bearings and engineering supplies.

SHIPPING

Shipping Policy

Insurance, Brands & Related Information

PICK UP

Pick up is available from our Coopers Plains warehouse after your order is ready. Please refer to your ready notification email, and bring it with you to collect your parcel.

PDF CATALOGUES

You may freely download the following catalogues to review and compare products. To help you select the most readily available items, rows are colour coded and marked according to the key at the bottom of each page.

Part numbers from these catalogues can be checked in the online store. If they don't appear in the store, please email us for more information about the part.

Ball Lock Pins

Balls

Bearing Material Selection and Benefits

Bearings - Ceramic

Bearings - Corrosion Resistant

Bearings - Economy

Bearings - High Speed

Bearings - Plastic

Bearings - Radial - Master List

Bearings - Standard Range

Bearings - Super Precision

Bearings - Thrust

Bushes - Metallic & Plastic

Bushes - Sintered Bronze

Bushes - Solid Bronze

Poly Vee Belts and Pulleys

Push On & Push In Rings

Thumbs Screws and Nuts

Timing Belts

Timing Pulley Stock

Timing Pulleys

Vibration Mounts - Bobbins and Buffers

Washers - Disc Spring

Washers - Precision Shim

Washers - Wave

Washers and Spacers

CROSS REFERENCES

We provide equivalents to many brands including Berg - Designatronics - Nordex - NSK - Oilite - Ondrives - Reid Industrial - SDP-SI - SKF. The following PDF cross references contain hundreds of thousands of part conversions.

ADR and SKF

Anderton Circlips

Barden Bearings

Designatronics SDP-SI

Essentra

Flocast Bronze Bushes

K&S Metals

Miniature Precision Bearings