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FR4Deep Groove Ball Bearings

SFR4

d 6.35 × D 15.875 × B 4.978 mm

The SFR4 is a deep groove ball bearing with bore 6.35mm, outer diameter 15.875mm, and width 4.978mm rated for dynamic load 1.1 kN.

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NOMINAL DIMENSION DRAWINGD = 15.875 mmd = 6.35 mmB = 4.978 mmNLHB BEARINGSSFR46.35 × 15.875 × 4.978 mmNOMINAL DIMENSIONS • TOLERANCE AND SUPPLY CONFIRMED PER INQUIRY
SFR4 · 6.35x15.875x4.978 mm

📋 Technical Specifications

Bore (d)
6.35mm
Outer Dia. (D)
15.875mm
Width (B)
4.978mm
Dynamic Load (Cr)
1.13 kN(1134 N)
Static Load (C0r)
0.45 kN(449 N)
Reference Speed
34200rpm
Bearing typeDeep Groove Ball Bearings
SeriesFR4
Seal typeOpen
MaterialConfirmed per inquiry — grade and certificate availability reviewed before quotation
Bore typeConfirmed per drawing
Measurement systemInch (imperial). Metric values converted at 25.4 mm/in; inch values in brackets.

📋 Nominal Variants by Seal Type

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

Seal TypeModel CodeTypical Use
Double metal shieldsSFR4 ZZ (inquiry only)General dust protectionQuote →
Double contact rubber sealsSFR4 2RS (inquiry only)Dust and moisture protection at moderate speedQuote →
Double non-contact rubber sealsSFR4 2RZ (inquiry only)Lower-friction sealing at higher speedQuote →
C3 radial clearanceSFR4 C3 (inquiry only)Motors and applications with higher operating temperatureQuote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)6.35 (0.25")
Outer diameter (D)15.875 (0.625")
Width (B)4.978 (0.196")

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

📑 Drawings & 3D Model

SFR4 bearing dimension drawing, 6.35 x 15.875 x 4.978 mm
SFR4 dimension drawing: bore d 6.35 mm × outer diameter D 15.875 mm × width B 4.978 mm. Tolerance class ABEC-1 (P0). Internal design is shown schematically. Flange Ø Df 17.526 mm, flange width Bf 1.067 mm.
📑
2D Drawing (PDF)
Download PDF →
📐
2D DXF File
Request DXF →
📅
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
34,200 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 6.35x15.875x4.978 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
FR4Different outer-ring featureFlanged Thin-Section BearingsSealedQuote →
FRW4Different outer-ring featureFlanged Thin-Section BearingsOpenQuote →
FRW4zzSame boundary dimensions — verify fit/loadFRW4ShieldedQuote →
SFR4 2rsConfiguration variantFR4SealedQuote →
SFR4zzConfiguration variantFR4ShieldedQuote →
SFRW4Same boundary dimensions — verify fit/loadFRW4OpenQuote →
SFRW4zzSame boundary dimensions — verify fit/loadFRW4ShieldedQuote →

⚙ 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 SFR4?
The SFR4 bearing has bore (d) = 6.35 mm, outer diameter (D) = 15.875 mm, and width (B) = 4.978 mm.
Is there a SFR4 drawing or CAD file?
Yes. The SFR4 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 SFR4?
Dynamic load rating (Cr) = 1.13 kN (1134 N), static load rating (C0r) = 0.45 kN.
What tolerance class is the SFR4?
The standard tolerance class of the SFR4 is ABEC-1 (P0) per GB/T 307.1, unless otherwise agreed.
What bearing series does SFR4 belong to?
The SFR4 belongs to the FR4 within the Deep Groove Ball Bearings category.
Can NLHB supply SFR4 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 SFR4 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 SFR4?
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 SFR4

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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