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ENEnglish繁中繁體中文ESEspañolARالعربيةFRFrançaisITItalianoPTPortuguêsRUРусскийDEDeutschJA日本語VITiếng ViệtKO한국어THไทยTRTürkçe

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Engineering Calculator · 054

Annular Seal Contact Width Calculator

Calculate radial contact width, annular area and mean diameter from outer and inner contact diameters.

Seal geometry
Start calculationReview the method

Live calculation

Enter the known values.

Units remain visible beside every field and result. Change any input to recalculate immediately in your browser.

01

Inputs

02

Results

Radial contact width5mm
Annular contact area392.7mm²
Mean contact diameter25mm

Formula
wannulus=Do−Di2w_{\mathrm{annulus}}=\frac{D_o-D_i}{2}

The calculation runs locally in this browser. Values are not submitted or stored by this tool.

Direct answer

What this result means

Calculate radial contact width, annular area and mean diameter from outer and inner contact diameters. The relationship w = (Do − Di) / 2 ties outer contact diameter and inner contact diameter directly to the reported result. The contact zone is a concentric planar annulus. Treat the value as a transparent preliminary calculation, then compare it with the actual cable-entry assembly and current product documentation.

Annular Seal Contact Width Calculator engineering relationship diagramw = (Do − Di) / 2 defines the calculation shown here. The contact zone is a concentric planar annulus. Keep the entered units with the result so another reviewer can reproduce the method. This dedicated schematic represents seal contact width and is not to scale.CONTACT ANNULUS · TOOL 054Outer contact diameterRadial contact width
Calculator-specific engineering relationship diagram — schematic, not a product drawing, and not to scale.

Formula & theory

Make the assumptions visible.

w = (Do − Di) / 2 defines the calculation shown here. The contact zone is a concentric planar annulus. Keep the entered units with the result so another reviewer can reproduce the method.

Calculation relationship
wannulus=Do−Di2w_{\mathrm{annulus}}=\frac{D_o-D_i}{2}

w = (Do − Di) / 2 defines the calculation shown here. The contact zone is a concentric planar annulus. Keep the entered units with the result so another reviewer can reproduce the method.

Variables

DoOuter contact diametermm
DiInner contact diametermm

Use sequence

From measurement to review

  1. Confirm outer contact diameter and inner contact diameter from a controlled drawing, measurement or project document.
  2. Apply w = (Do − Di) / 2 with consistent units and keep the entered values beside the result.
  3. Use radial contact width only after checking actual loaded contact boundaries, surface flatness, compression and material behaviour.

Limits

What this calculation does not confirm

  • The contact zone is a concentric planar annulus.
  • Inputs describe one defined operating or measurement condition and use mutually consistent units.
  • The result does not by itself confirm product suitability, standards compliance, ingress performance or installation approval.

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Calculator FAQ

Use the number without losing the engineering context.

These answers clarify what the tool calculates and where a product-specific review still begins.

01Calculator guidanceHow does the annular seal contact width calculator calculate radial contact width?

The tool applies w = (Do − Di) / 2 to outer contact diameter, inner contact diameter. The contact zone is a concentric planar annulus. Keep the displayed units with the result so the calculation can be repeated.

02Calculator guidanceWhat does radial contact width show for this contact annulus review?

Calculate radial contact width, annular area and mean diameter from outer and inner contact diameters. It is a preliminary engineering value, not confirmation of a cable-gland model, standards compliance or installation approval.

03Calculator guidanceWhat should be checked about actual loaded contact boundaries before using the annular seal contact width calculator result?

The equation does not model actual loaded contact boundaries, surface flatness, compression and material behaviour. Confirm those conditions against the actual cable-entry assembly, applicable requirement and current product documentation.

Product selection support

Connect the calculation with cable-entry product options.

Bepto Cable Glands can help relate a preliminary result to the product family and current model information for your application. You can start with the details you have; a complete drawing package is not needed to ask a question.

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