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FR155Deep Groove Ball Bearings

SFR155

d 3.97 × D 7.938 × B 2.779 mm

The SFR155 is a deep groove ball bearing with bore 3.97mm, outer diameter 7.938mm, and width 2.779mm rated for dynamic load 0.3 kN.

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NOMINAL DIMENSION DRAWINGD = 7.938 mmd = 3.97 mmB = 2.779 mmNLHB BEARINGSSFR1553.97 × 7.938 × 2.779 mmNOMINAL DIMENSIONS • TOLERANCE AND SUPPLY CONFIRMED PER INQUIRY
SFR155 · 3.97x7.938x2.779 mm

📋 Technical Specifications

Bore (d)
3.97mm
Outer Dia. (D)
7.938mm
Width (B)
2.779mm
Dynamic Load (Cr)
0.28 kN(276 N)
Static Load (C0r)
0.11 kN(107 N)
Reference Speed
47700rpm
Bearing typeDeep Groove Ball Bearings
SeriesFR155
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 shieldsSFR155 ZZ (inquiry only)General dust protectionQuote →
Double contact rubber sealsSFR155 2RS (inquiry only)Dust and moisture protection at moderate speedQuote →
Double non-contact rubber sealsSFR155 2RZ (inquiry only)Lower-friction sealing at higher speedQuote →
C3 radial clearanceSFR155 C3 (inquiry only)Motors and applications with higher operating temperatureQuote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)3.97 (0.1563")
Outer diameter (D)7.938 (0.3125")
Width (B)2.779 (0.1094")

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

📑 Drawings & 3D Model

SFR155 bearing dimension drawing, 3.97 x 7.938 x 2.779 mm
SFR155 dimension drawing: bore d 3.97 mm × outer diameter D 7.938 mm × width B 2.779 mm. Tolerance class ABEC-1 (P0). Internal design is shown schematically. Flange Ø Df 9.119 mm, flange width Bf 0.584 mm.
📑
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
47,700 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 3.97x7.938x2.779 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.

No other catalog models share the same boundary dimensions.

🔄 Related Models

Same bearing family or similar dimensions.

Same model family — dimensions may differ
SFR155 2rs
3.97x7.938x3.175 mm
FR155
B +0.4mm
Similar size — reference only, verify all interfaces
FR155
3.97x7.938x3.175 mm
MR Miniature Series
B +0.4mm
SFR155zz
3.97x7.938x3.175 mm
FR155
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 SFR155?
The SFR155 bearing has bore (d) = 3.97 mm, outer diameter (D) = 7.938 mm, and width (B) = 2.779 mm.
Is there a SFR155 drawing or CAD file?
Yes. The SFR155 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 SFR155?
Dynamic load rating (Cr) = 0.28 kN (276 N), static load rating (C0r) = 0.11 kN.
What tolerance class is the SFR155?
The standard tolerance class of the SFR155 is ABEC-1 (P0) per GB/T 307.1, unless otherwise agreed.
What bearing series does SFR155 belong to?
The SFR155 belongs to the FR155 within the Deep Groove Ball Bearings category.
Can NLHB supply SFR155 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 SFR155 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 SFR155?
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 SFR155

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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