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ENEnglish繁中繁體中文ESEspañolARالعربيةFRFrançaisITItalianoPTPortuguêsRUРусскийDEDeutschJA日本語VITiếng ViệtKO한국어THไทยTRTürkçe

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Engineering Calculator · 006

Cable Ovality Limit Calculator

Calculate measured cable ovality and compare it with a project-defined ovality limit without averaging away the major diameter.

Cable dimensions
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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

Mean diameter18mm
Measured ovality11.11%
Limit margin0.89%

Formula
Oc=Dmax⁡−Dmin⁡(Dmax⁡+Dmin⁡)/2 100%O_c=\frac{D_{\max}-D_{\min}}{(D_{\max}+D_{\min})/2}\,100\%

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

Direct answer

What this result means

Calculate measured cable ovality and compare it with a project-defined ovality limit without averaging away the major diameter. The relationship O = (Dmajor − Dminor) / Dmean × 100% ties major diameter, minor diameter and project ovality limit directly to the reported result. The two diameters are perpendicular measurements of one section. Treat the value as a transparent preliminary calculation, then compare it with the actual cable-entry assembly and current product documentation.

Cable Ovality Limit Calculator engineering relationship diagramO = (Dmajor − Dminor) / Dmean × 100% defines the calculation shown here. The two diameters are perpendicular measurements of one section. Keep the entered units with the result so another reviewer can reproduce the method. This dedicated schematic represents ovality limit and is not to scale.OVALITY MARGIN · TOOL 006Major diameterMean diameter
Calculator-specific engineering relationship diagram — schematic, not a product drawing, and not to scale.

Formula & theory

Make the assumptions visible.

O = (Dmajor − Dminor) / Dmean × 100% defines the calculation shown here. The two diameters are perpendicular measurements of one section. Keep the entered units with the result so another reviewer can reproduce the method.

Calculation relationship
Oc=Dmax⁡−Dmin⁡(Dmax⁡+Dmin⁡)/2 100%O_c=\frac{D_{\max}-D_{\min}}{(D_{\max}+D_{\min})/2}\,100\%

O = (Dmajor − Dminor) / Dmean × 100% defines the calculation shown here. The two diameters are perpendicular measurements of one section. Keep the entered units with the result so another reviewer can reproduce the method.

Variables

DminorMinor diametermm
DmeanMean diametermm
OMeasured ovality%

Use sequence

From measurement to review

  1. Confirm major diameter and minor diameter from a controlled drawing, measurement or project document.
  2. Apply O = (Dmajor − Dminor) / Dmean × 100% with consistent units and keep the entered values beside the result.
  3. Use mean diameter only after checking perpendicular measurements, measurement compression and the source of the allowed ovality.

Limits

What this calculation does not confirm

  • The two diameters are perpendicular measurements of one section.
  • 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 cable ovality limit calculator calculate mean diameter?

The tool applies O = (Dmajor − Dminor) / Dmean × 100% to major diameter, minor diameter, project ovality limit. The two diameters are perpendicular measurements of one section. Keep the displayed units with the result so the calculation can be repeated.

02Calculator guidanceWhat does mean diameter show for this ovality margin review?

Calculate measured cable ovality and compare it with a project-defined ovality limit without averaging away the major diameter. It is a preliminary engineering value, not confirmation of a cable-gland model, standards compliance or installation approval.

03Calculator guidanceWhat should be checked about perpendicular measurements before using the cable ovality limit calculator result?

The equation does not model perpendicular measurements, measurement compression and the source of the allowed ovality. 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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