F684Deep Groove Ball Bearings

SF684

d 4 × D 9 × B 2.5 mm

The SF684 is a deep groove ball bearing with bore 4mm, outer diameter 9mm, and width 2.5mm rated for dynamic load 0.5 kN.

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SF684 · 4x9x2.5 mm

📋 Technical Specifications

Bore (d)

4mm

Outer Dia. (D)

9mm

Width (B)

2.5mm

Dynamic Load (Cr)

0.49 kN(489.304 N)

Static Load (C0r)

0.16 kN(164.584 N)

Reference Speed

47700rpm

Bearing type	Deep Groove Ball Bearings
Series	F684
Seal type	Open
Material	Confirmed per inquiry — grade and certificate availability reviewed before quotation
Bore type	Confirmed per drawing
Dimension unit	millimeter (mm)

📋 Nominal Variants by Seal Type

Catalog variants open a detail page. Inquiry-only configurations go directly to RFQ.

Seal Type	Model Code	Typical Use
Double metal shields	SF684 ZZ (inquiry only)	General dust protection	Quote →
Double contact rubber seals	SF684 2RS (inquiry only)	Dust and moisture protection at moderate speed	Quote →
Double non-contact rubber seals	SF684 2RZ (inquiry only)	Lower-friction sealing at higher speed	Quote →
C3 radial clearance	SF684 C3 (inquiry only)	Motors and applications with higher operating temperature	Quote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)	4
Outer diameter (D)	9
Width (B)	2.5

Corner radius, shoulder dimensions, fits and tolerances are confirmed against the requested suffix and application drawing before quotation.

📑 Drawings & 3D Model

📑

2D Drawing

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📅

3D STEP Model

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🔎

CAD File

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Drawings and 3D models are provided per inquiry. Tell us your application and we will send the appropriate file format (DXF, DWG, STEP, IGES).

⚡ Source-Data Reference Speed

Catalog reference

47,700 rpm

Lubrication method and application speed limit are confirmed per inquiry; no oil-speed value is derived from this number.

⇄ Same-size Bearings & Reference Options

The models below share the 4x9x2.5 mm boundary dimensions. Matching d/D/B alone does not prove interchangeability; verify seals, clearance, ring features, load ratings, fits, and application conditions before replacement.

Model	Relationship	Series	Seal	Action
618/4	Same boundary dimensions — verify fit/load	Miniature 600 Series	Open	Quote →
684	Same boundary dimensions — verify fit/load	6700 / 6800 / 6900 Thin-Section Series	Open	Quote →
684A	Same boundary dimensions — verify fit/load	6700 / 6800 / 6900 Thin-Section Series	Open	Quote →

🔄 Related Models

Same bearing family or similar dimensions.

Same model family — dimensions may differ

⚙ Typical Applications

Electric motors

Fans and blowers

Pumps

Household appliances

Power tools

Office equipment

General machinery

Why choose NLHB?

NLHB supports both in-house manufacturing and qualified partner sourcing. We confirm the specification, supply route, inspection requirements, and available documentation before quotation.

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4,315

Catalog Models

15+

Years

RFQ

Specification Confirmed

❓ Frequently Asked Questions

What are the dimensions of SF684?

The SF684 bearing has bore (d) = 4 mm, outer diameter (D) = 9 mm, and width (B) = 2.5 mm.

What is the load rating of SF684?

Dynamic load rating (Cr) = 0.49 kN (489.304 N), static load rating (C0r) = 0.16 kN.

What bearing series does SF684 belong to?

The SF684 belongs to the F684 within the Deep Groove Ball Bearings category.

Can NLHB supply SF684 equivalents from other brands?

Depending on the model and order requirements, NLHB may manufacture in-house or source through qualified partner factories. Interchange and supply route are confirmed against your specification before quotation. All trademarks belong to their respective owners.

How do I order SF684 from NLHB?

Click "Request Quote" and send us your quantity, application, and required specifications. We review the specification, supply route, lead time, and pricing before issuing a quotation. Response time depends on specification complexity.

What materials are available for SF684?

Material grade is confirmed per inquiry. Availability depends on the model, quantity, application, and whether the order is manufactured in-house or sourced through a qualified partner factory. Material certificates or inspection documents are confirmed before quotation when required.

Get a quote for SF684

Send us your quantity, application and target lead time. We confirm spec, interchange and realistic delivery — no order confirmed until you approve.

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