WR / International SeriesStraightening & Tire-Cord Bearings

WR31

d 8 × D 31 × B 10 mm

The WR31 is a straightening and tire-cord bearing with bore 8mm, outer diameter 31mm, and width 10mm.

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WR31 — representative product photo — Representative product

WR31 · 8x31x10 mm

📋 Technical Specifications

Bore (d)

8mm

Outer Dia. (D)

31mm

Width (B)

10mm

Dynamic Load (Cr)

Confirm per inquiry(— N)

Static Load (C0r)

Confirm per inquiry(— N)

Reference Speed

Confirm per inquiryrpm

Bearing type	Straightening & Tire-Cord Bearings
Series	WR / International Series
Seal type	Confirm per inquiry
Material	Confirmed per inquiry — grade and certificate availability reviewed before quotation
Bore type	Confirmed per drawing
Dimension unit	millimeter (mm)

📋 Nominal Variants by Seal Type

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

Seal Type	Model Code	Typical Use
Double metal shields	WR31 ZZ (inquiry only)	General dust protection	Quote →
Double contact rubber seals	WR31 2RS (inquiry only)	Dust and moisture protection at moderate speed	Quote →
Double non-contact rubber seals	WR31 2RZ (inquiry only)	Lower-friction sealing at higher speed	Quote →
C3 radial clearance	WR31 C3 (inquiry only)	Motors and applications with higher operating temperature	Quote →

📐 Detailed Dimensions

Basic dimensions (mm)

Bore diameter (d)	8
Outer diameter (D)	31
Width (B)	10

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

📑 Drawings & 3D Model

📑

2D Drawing

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📅

3D STEP Model

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🔎

CAD File

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Drawings and 3D models are provided per inquiry. Tell us your application and we will send the appropriate file format (DXF, DWG, STEP, IGES).

⇄ Same-size Bearings & Reference Options

The models below share the 8x31x10 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

Tire building machines

Conveyor alignment

Web guiding

Material handling

Steel and metal processing

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 →

4,315

Catalog Models

15+

Years

RFQ

Specification Confirmed

❓ Frequently Asked Questions

What are the dimensions of WR31?

The WR31 bearing has bore (d) = 8 mm, outer diameter (D) = 31 mm, and width (B) = 10 mm.

What is the load rating of WR31?

Load rating data is being updated. Please request a quote for current specifications.

What bearing series does WR31 belong to?

The WR31 belongs to the WR / International Series within the Straightening & Tire-Cord Bearings category.

Can NLHB supply WR31 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 WR31 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 WR31?

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 WR31

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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