Inch-Size Flanged Miniature Bearing

SFR4-ZZ Flanged Stainless Steel Ball Bearing | 1/4" × 5/8" × 0.196" | In Stock

1/4" Bore × 5/8" OD × 0.196" Width · Stainless Steel · Flanged · Double Metal Shielded · In Stock · Compatibility Verification Available

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Send us your part number, dimensions, photo, or sample — we'll help confirm the correct replacement before you order.

When You Need This Bearing, You're Usually Confirming a Fit

The SFR4-ZZ is an inch-size flanged miniature ball bearing designed for equipment using imperial dimensions.

For a flanged bearing, matching the bore alone is not enough. The 1/4" bore, 5/8" outside diameter, 0.196" width, and flange configuration all need to match the original housing and bearing arrangement.

If you're replacing an existing SFR4-ZZ or another flanged miniature bearing, we recommend confirming the complete specification before ordering.

Technical Specifications

The 1/4" × 5/8" × 0.196" dimensions are commonly listed for SFR4-size flanged inch miniature bearings.

What This Bearing Is

The SFR4-ZZ is an inch-size flanged miniature deep groove ball bearing with a 1/4" bore, 5/8" outside diameter, and 0.196" width.

The flange provides a locating surface at the housing, which can help retain the bearing axially without requiring the same type of separate housing retaining arrangement used with an unflanged bearing.

The ZZ designation indicates double metal shields. These shields help retain the internal lubricant and reduce the entry of light external contaminants.

This EKB version uses stainless steel construction, making it suitable for applications where corrosion resistance is an important consideration.

For applications that do not require a flange, see our R4-ZZ Stainless Steel Miniature Ball Bearing.

Where This Bearing Is Used

The SFR4-ZZ can be considered for applications such as:

• Small motors and electrical equipment

• Instruments and compact mechanisms

• Fishing reels and sporting equipment

• RC and hobby equipment

• Small power tools

• Equipment designed around inch-size miniature bearings

• Applications where the housing requires a flanged bearing

Actual suitability depends on load, speed, temperature, environment, shaft fit, and the specific flange arrangement required by the equipment.

Need to Match an Existing SFR4-ZZ Bearing?

This is where many miniature bearing replacement orders go wrong.

A 1/4" bore alone does not confirm compatibility.

Before ordering, check:
Bore → Outer Diameter → Width → Flange → Shield / Seal → Material → Application

For replacement applications, also confirm whether the original bearing is:
Flanged or unflanged

The SFR4-ZZ is the flanged version.

Send us any of the following:

• Existing bearing number

• Bore, OD, and width

• Bearing photo

• Drawing

• Physical sample

• Equipment model

We'll check the dimensions and flange configuration before shipment.

Don't have all the information? Send us whatever you have.
A photo, partial dimensions, or the original bearing number may be enough for us to start the identification.

SFR4-ZZ vs. R4-ZZ

SFR4-ZZ and R4-ZZ are different products. The main structural difference is the flange.

Do not choose between them by dimensions alone.

If the housing is designed to accept a flange, SFR4-ZZ may be the appropriate configuration.

If no flange is required, see the R4-ZZ Stainless Steel Miniature Ball Bearing page.

Looking for the unflanged version? See our R4-ZZ page.

Why Buy From EKB?

For small inch-size bearings, the basic dimensions may look simple, but an incorrect flange, shield type, material, or width can still result in the wrong replacement.

EKB helps customers check:
Dimensions → Configuration → Application → Availability
so you don't have to rely on the bore size or part number alone.

About EKB

EKB Bearing (Hebei Shuanghejincheng Bearing Co., Ltd.) operates an 18,000 m² factory with 13 automated production lines and 42 high-precision testing units, with products exported to 66 countries.

We support customers with difficult-to-source bearing requirements, including inch-size, miniature, special-dimension, and replacement bearings.

Frequently Asked Questions

What are the dimensions of SFR4-ZZ?
The SFR4-ZZ dimensions are: 1/4" bore × 5/8" outside diameter × 0.196" width
or approximately: 6.35 × 15.875 × 4.978 mm.

What does ZZ mean on SFR4-ZZ?
ZZ indicates double metal shields. These shields help retain the internal lubricant and reduce the entry of light external contaminants.

What is the difference between SFR4-ZZ and R4-ZZ?
SFR4-ZZ is flanged, while R4-ZZ is unflanged.
The basic bore, outside diameter, and width are the same for these two configurations, but the flange changes how the bearing locates within the housing.

Is SFR4-ZZ stainless steel?
This EKB version is supplied as a stainless steel SFR4-ZZ.
The exact stainless steel grade should be confirmed for the required application.

Can I replace another 1/4" bearing with SFR4-ZZ?
Not automatically.
Confirm the complete bore, outside diameter, width, flange configuration, shield/seal type, material, and application requirements before replacement.

Does SFR4-ZZ need a retaining ring?
Not necessarily.
The flange itself can provide a housing locating surface, but the actual retaining arrangement depends on the housing design.

What if I only have the old bearing?
Send us a photo, the dimensions you can measure, the original marking, or the physical sample.
You don't need to know the exact replacement model before contacting us.

Need to Confirm SFR4-ZZ?

Send us: Part Number · Dimensions · Photo · Drawing · Sample
We'll confirm: Size · Flange Configuration · Material · Availability
Before you place the order.

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