6700 / 6800 / 6900 Thin-Section SeriesDeep Groove Ball Bearingscross-ref: NSK

691

d 1 × D 4 × B 1.6 mm

The 691 is a deep groove ball bearing with bore 1mm, outer diameter 4mm, and width 1.6mm rated for dynamic load 0.2 kN.

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691 — representative product photo — Representative product

691 · 1x4x1.6 mm

📋 Technical Specifications

Bore (d)

1mm

Outer Dia. (D)

4mm

Width (B)

1.6mm

Dynamic Load (Cr)

0.15 kN(153 N)

Static Load (C0r)

0.04 kN(36 N)

Reference Speed

100000rpm

Bearing type	Deep Groove Ball Bearings
Series	6700 / 6800 / 6900 Thin-Section Series
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	691 ZZ (inquiry only)	General dust protection	Quote →
Double contact rubber seals	691 2RS (inquiry only)	Dust and moisture protection at moderate speed	Quote →
Double non-contact rubber seals	691 2RZ (inquiry only)	Lower-friction sealing at higher speed	Quote →
C3 radial clearance	691 C3 (inquiry only)	Motors and applications with higher operating temperature	Quote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)	1
Outer diameter (D)	4
Width (B)	1.6

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

100,000 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 1x4x1.6 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
F691	Different outer-ring feature	Standard Flanged Bearings	Open	Quote →
SF691	Same boundary dimensions — verify fit/load	F691	Open	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.

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4,315

Catalog Models

15+

Years

RFQ

Specification Confirmed

❓ Frequently Asked Questions

What are the dimensions of 691?

The 691 bearing has bore (d) = 1 mm, outer diameter (D) = 4 mm, and width (B) = 1.6 mm.

What is the load rating of 691?

Dynamic load rating (Cr) = 0.15 kN (153 N), static load rating (C0r) = 0.04 kN.

What bearing series does 691 belong to?

The 691 belongs to the 6700 / 6800 / 6900 Thin-Section Series within the Deep Groove Ball Bearings category.

Can NLHB supply 691 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 691 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 691?

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 691

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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691