MR Miniature SeriesDeep Groove Ball Bearingscross-ref: NSK

R2A

d 3.175 × D 12.7 × B 4.366 mm

The R2A is a deep groove ball bearing with bore 3.175mm, outer diameter 12.7mm, and width 4.366mm rated for dynamic load 0.7 kN.

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R2A — representative product photo — Representative product

R2A · 3.175x12.7x4.366 mm

📋 Technical Specifications

Bore (d)

3.175mm

Outer Dia. (D)

12.7mm

Width (B)

4.366mm

Dynamic Load (Cr)

0.70 kN(705 N)

Static Load (C0r)

0.23 kN(225 N)

Reference Speed

53000rpm

Bearing type	Deep Groove Ball Bearings
Series	MR Miniature Series
Seal type	Open
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)	3.175
Outer diameter (D)	12.7
Width (B)	4.366

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

53,000 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 3.175x12.7x4.366 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
R2A 2rs	Configuration variant	Inch R Series	Sealed	Quote →
R2A ZZ	Configuration variant	Extra Small / Miniature Deep Groove Ball Bearing Inch Series	Metal Shields	Quote →
R2AZZ	Configuration variant	MR Miniature Series	Metal Shields	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 R2A?

The R2A bearing has bore (d) = 3.175 mm, outer diameter (D) = 12.7 mm, and width (B) = 4.366 mm.

What is the load rating of R2A?

Dynamic load rating (Cr) = 0.70 kN (705 N), static load rating (C0r) = 0.23 kN.

What bearing series does R2A belong to?

The R2A belongs to the MR Miniature Series within the Deep Groove Ball Bearings category.

Can NLHB supply R2A 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 R2A 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 R2A?

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 R2A

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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R2A