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3900Double-Row Angular Contact Ball Bearings

3911

d 55 × D 80 × B 19 mm

The 3911 is a double-row angular contact ball bearing with bore 55mm, outer diameter 80mm, and width 19mm rated for dynamic load 20.0 kN.

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3911 — representative product photo
Representative product
3911 · 55x80x19 mm

📋 Technical Specifications

Bore (d)
55mm
Outer Dia. (D)
80mm
Width (B)
19mm
Dynamic Load (Cr)
20.00 kN(20000 N)
Static Load (C0r)
21.70 kN(21700 N)
Reference Speed
5300rpm
Bearing typeDouble-Row Angular Contact Ball Bearings
Series3900
Seal type2RS (rubber seals) or ZZ (metal 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
Double metal shields3911 ZZ (inquiry only)General dust protectionQuote →
Double contact rubber seals3911 2RS (inquiry only)Dust and moisture protection at moderate speedQuote →
Double non-contact rubber seals3911 2RZ (inquiry only)Lower-friction sealing at higher speedQuote →
C3 radial clearance3911 C3 (inquiry only)Motors and applications with higher operating temperatureQuote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)55
Outer diameter (D)80
Width (B)19

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

📑 Drawings & 3D Model

3911 bearing dimension drawing, 55 x 80 x 19 mm
3911 dimension drawing: bore d 55 mm × outer diameter D 80 mm × width B 19 mm. Tolerance class ABEC-1 (P0). Internal design is shown schematically. Supplied sealed: 2RS (rubber seals) or ZZ (metal shields).
📑
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
5,300 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 55x80x19 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.

⚙ Typical Applications

Pumps
Compressors
Gearboxes
Automotive wheels
Material handling
Textile 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 3911?
The 3911 bearing has bore (d) = 55 mm, outer diameter (D) = 80 mm, and width (B) = 19 mm.
Is there a 3911 drawing or CAD file?
Yes. The 3911 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 3911?
Dynamic load rating (Cr) = 20.00 kN (20000 N), static load rating (C0r) = 21.70 kN.
What tolerance class is the 3911?
The standard tolerance class of the 3911 is ABEC-1 (P0) per GB/T 307.1, unless otherwise agreed.
What bearing series does 3911 belong to?
The 3911 belongs to the 3900 within the Double-Row Angular Contact Ball Bearings category.
Can NLHB supply 3911 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 3911 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 3911?
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 3911

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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