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Engineering Calculator · 059

Compressed Seal Opening Calculator

Calculate final seal opening diameter and area reduction from an entered diametral reduction percentage.

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

Final opening diameter16.2mm
Diameter reduction1.8mm
Opening area reduction19%

Formula
D1,opening=D0(1−rd)D_{1,\mathrm{opening}}=D_0(1-r_d)

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

Direct answer

What this result means

Calculate final seal opening diameter and area reduction from an entered diametral reduction percentage. The relationship D1 = D0(1 − r) ties initial seal opening and diameter reduction directly to the reported result. The opening remains circular during the entered diameter reduction. Treat the value as a transparent preliminary calculation, then compare it with the actual cable-entry assembly and current product documentation.

Compressed Seal Opening Calculator engineering relationship diagramD1 = D0(1 − r) defines the calculation shown here. The opening remains circular during the entered diameter reduction. Keep the entered units with the result so another reviewer can reproduce the method. This dedicated schematic represents compressed seal opening and is not to scale.OPENING REDUCTION · TOOL 059Initial seal openingFinal opening diameter
Calculator-specific engineering relationship diagram — schematic, not a product drawing, and not to scale.

Formula & theory

Make the assumptions visible.

D1 = D0(1 − r) defines the calculation shown here. The opening remains circular during the entered diameter reduction. Keep the entered units with the result so another reviewer can reproduce the method.

Calculation relationship
D1,opening=D0(1−rd)D_{1,\mathrm{opening}}=D_0(1-r_d)

D1 = D0(1 − r) defines the calculation shown here. The opening remains circular during the entered diameter reduction. Keep the entered units with the result so another reviewer can reproduce the method.

Variables

D0Initial seal openingmm
rDiameter reduction%
D1Final opening diametermm

Use sequence

From measurement to review

  1. Confirm initial seal opening and diameter reduction from a controlled drawing, measurement or project document.
  2. Apply D1 = D0(1 − r) with consistent units and keep the entered values beside the result.
  3. Use final opening diameter only after checking whether the reduction definition is valid for the seal design, tolerances and material limits.

Limits

What this calculation does not confirm

  • The opening remains circular during the entered diameter reduction.
  • 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 compressed seal opening calculator calculate final opening diameter?

The tool applies D1 = D0(1 − r) to initial seal opening, diameter reduction. The opening remains circular during the entered diameter reduction. Keep the displayed units with the result so the calculation can be repeated.

02Calculator guidanceWhat does final opening diameter show for this opening reduction review?

Calculate final seal opening diameter and area reduction from an entered diametral reduction percentage. It is a preliminary engineering value, not confirmation of a cable-gland model, standards compliance or installation approval.

03Calculator guidanceWhat should be checked about whether the reduction definition is valid for the seal design before using the compressed seal opening calculator result?

The equation does not model whether the reduction definition is valid for the seal design, tolerances and material limits. 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.

Request product support