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Home/Products/Extra Small / Miniature Deep Groove Ball Bearing Inch Series/R144 ZZ
Extra Small / Miniature Deep Groove Ball Bearing Inch SeriesDeep Groove Ball BearingsMetal Shields

R144 ZZ

d 3.175 × D 6.35 × B 2.779 mm

The R144 ZZ is a deep groove ball bearing with bore 3.175mm, outer diameter 6.35mm, and width 2.779mm rated for dynamic load 0.3 kN.

Request Quote for R144 ZZSearch Similar
NOMINAL DIMENSION DRAWINGD = 6.35 mmd = 3.175 mmB = 2.779 mmNLHB BEARINGSR144 ZZ3.175 × 6.35 × 2.779 mmNOMINAL DIMENSIONS • TOLERANCE AND SUPPLY CONFIRMED PER INQUIRY
R144 ZZ · 3.175x6.35x2.779 mm

📋 Technical Specifications

Bore (d)
3.175mm
Outer Dia. (D)
6.35mm
Width (B)
2.779mm
Dynamic Load (Cr)
0.28 kN(283 N)
Static Load (C0r)
0.10 kN(95 N)
Reference Speed
67000rpm
Bearing typeDeep Groove Ball Bearings
SeriesExtra Small / Miniature Deep Groove Ball Bearing Inch Series
Seal typeMetal Shields
MaterialConfirmed per inquiry — grade and certificate availability reviewed before quotation
Bore typeConfirmed per drawing
Dimension unitmillimeter (mm)

📋 Nominal Variants by Seal Type

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

Seal TypeModel CodeTypical Use
OpenR144High speed in clean environmentsQuote →
Double contact rubber sealsR144 2RS (inquiry only)Dust and moisture protection at moderate speedQuote →
Double non-contact rubber sealsR144 2RZ (inquiry only)Lower-friction sealing at higher speedQuote →
C3 radial clearanceR144 C3 (inquiry only)Motors and applications with higher operating temperatureQuote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)3.175
Outer diameter (D)6.35
Width (B)2.779

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

📑 Drawings & 3D Model

R144 ZZ bearing dimension drawing, 3.175 x 6.35 x 2.779 mm
R144 ZZ dimension drawing: bore d 3.175 mm × outer diameter D 6.35 mm × width B 2.779 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
67,000 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 3.175x6.35x2.779 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.

ModelRelationshipSeriesSealAction
FR144ZZSame boundary dimensions — verify fit/loadMR Miniature SeriesShieldedQuote →
R144 2rsConfiguration variantInch R SeriesSealedQuote →
RW144zzSame boundary dimensions — verify fit/loadInch RW SeriesShieldedQuote →

🔄 Related Models

Same bearing family or similar dimensions.

Same model family — dimensions may differ
R144
3.175x6.35x2.38 mm
MR Miniature Series
B -0.4mm
Similar size — reference only, verify all interfaces
RW144
3.175x6.35x2.38 mm
Inch RW Series
B -0.4mm

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

❓ Frequently Asked Questions

What are the dimensions of R144 ZZ?
The R144 ZZ bearing has bore (d) = 3.175 mm, outer diameter (D) = 6.35 mm, and width (B) = 2.779 mm.
Is there a R144 ZZ drawing or CAD file?
Yes. The R144 ZZ 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 R144 ZZ?
Dynamic load rating (Cr) = 0.28 kN (283 N), static load rating (C0r) = 0.10 kN.
What tolerance class is the R144 ZZ?
The standard tolerance class of the R144 ZZ is ABEC-1 (P0) per GB/T 307.1, unless otherwise agreed.
What bearing series does R144 ZZ belong to?
The R144 ZZ belongs to the Extra Small / Miniature Deep Groove Ball Bearing Inch Series within the Deep Groove Ball Bearings category.
Can NLHB supply R144 ZZ 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 R144 ZZ 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 R144 ZZ?
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 R144 ZZ

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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