6300Deep Groove Ball BearingsMetal Shieldscross-ref: NSK

638ZZ1

d 8 × D 28 × B 9 mm

The 638ZZ1 is a deep groove ball bearing with bore 8mm, outer diameter 28mm, and width 9mm rated for dynamic load 5.0 kN.

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638ZZ1 — representative product photo — Representative product

638ZZ1 · 8x28x9 mm

📋 Technical Specifications

Bore (d)

8mm

Outer Dia. (D)

28mm

Width (B)

9mm

Dynamic Load (Cr)

5.05 kN(5050 N)

Static Load (C0r)

1.97 kN(1970 N)

Reference Speed

28000rpm

Bearing type	Deep Groove Ball Bearings
Series	6300
Seal type	Metal Shields
Material	Confirmed per inquiry — grade and certificate availability reviewed before quotation
Bore type	Confirmed per drawing
Dimension unit	millimeter (mm)

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)	8
Outer diameter (D)	28
Width (B)	9

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

28,000 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 8x28x9 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
638	Same boundary dimensions — verify fit/load	6300	Open	Quote →
638 2RS	Same boundary dimensions — verify fit/load	6300	Rubber Seals	Quote →
638 2RZ	Same boundary dimensions — verify fit/load	6300	Rubber Seals	Quote →
638 ZZ	Same boundary dimensions — verify fit/load	Extra Small / Miniature Deep Groove Ball Bearing	Metal Shields	Quote →
638DD	Same boundary dimensions — verify fit/load	6300	Open	Quote →
638VV	Same boundary dimensions — verify fit/load	6300	Open	Quote →
638zz	Same boundary dimensions — verify fit/load	Metric Miniature Series	Shielded	Quote →

⚙ 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.

About NLHB →

4,315

Catalog Models

15+

Years

RFQ

Specification Confirmed

❓ Frequently Asked Questions

What are the dimensions of 638ZZ1?

The 638ZZ1 bearing has bore (d) = 8 mm, outer diameter (D) = 28 mm, and width (B) = 9 mm.

What is the load rating of 638ZZ1?

Dynamic load rating (Cr) = 5.05 kN (5050 N), static load rating (C0r) = 1.97 kN.

What bearing series does 638ZZ1 belong to?

The 638ZZ1 belongs to the 6300 within the Deep Groove Ball Bearings category.

Can NLHB supply 638ZZ1 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 638ZZ1 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 638ZZ1?

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 638ZZ1

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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