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MR Miniature SeriesDeep Groove Ball Bearings

R4AA

d 6.35 × D 19.05 × B 5.558 mm

The R4AA is a deep groove ball bearing with bore 6.35mm, outer diameter 19.05mm, and width 5.558mm rated for dynamic load 2.9 kN.

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R4AA — representative product photo
Representative product
R4AA · 6.35x19.05x5.558 mm

📋 Technical Specifications

Bore (d)
6.35mm
Outer Dia. (D)
19.05mm
Width (B)
5.558mm
Dynamic Load (Cr)
2.88 kN(2880 N)
Static Load (C0r)
0.89 kN(885 N)
Reference Speed
36000rpm
Bearing typeDeep Groove Ball Bearings
SeriesMR Miniature Series
Seal typeOpen
MaterialConfirmed per inquiry — grade and certificate availability reviewed before quotation
Bore typeConfirmed per drawing
Dimension unitmillimeter (mm)

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)6.35
Outer diameter (D)19.05
Width (B)5.558

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

📑 Drawings & 3D Model

R4AA bearing dimension drawing, 6.35 x 19.05 x 5.558 mm
R4AA dimension drawing: bore d 6.35 mm × outer diameter D 19.05 mm × width B 5.558 mm. Tolerance class ABEC-1 (P0). Internal design is shown schematically.
📑
2D Drawing (PDF)
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📐
2D DXF File
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📅
3D STEP Model
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The PDF drawing is free to download. DXF and 3D STEP files are sent on request: tell us the model and your application, and we reply with the CAD files.

⚡ Source-Data Reference Speed

Catalog reference
36,000 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 6.35x19.05x5.558 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.

No other catalog models share the same boundary dimensions.

🔄 Related Models

Same bearing family or similar dimensions.

Same model family — dimensions may differ
R4AA ZZ
6.35x19.05x7.142 mm
Extra Small / Miniature Deep Groove Ball Bearing Inch Series
B +1.6mm
Similar size — reference only, verify all interfaces
R4A
6.35x19.05x5.556 mm
Inch R / 1600 Series
B -0.0mm

⚙ 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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4,300+
Models
15+
Years
RFQ
Specification Confirmed

❓ Frequently Asked Questions

What are the dimensions of R4AA?
The R4AA bearing has bore (d) = 6.35 mm, outer diameter (D) = 19.05 mm, and width (B) = 5.558 mm.
Is there a R4AA drawing or CAD file?
Yes. The R4AA dimension drawing (PDF) is free to download on this page. DXF and 3D STEP files are sent on request: tell us the model and your application.
What is the load rating of R4AA?
Dynamic load rating (Cr) = 2.88 kN (2880 N), static load rating (C0r) = 0.89 kN.
What tolerance class is the R4AA?
The standard tolerance class of the R4AA is ABEC-1 (P0) per GB/T 307.1, unless otherwise agreed.
What bearing series does R4AA belong to?
The R4AA belongs to the MR Miniature Series within the Deep Groove Ball Bearings category.
Can NLHB supply R4AA 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 R4AA 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 R4AA?
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 R4AA

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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