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Engineering Calculator · 031

Entry Hole Radial Clearance Calculator

Calculate diametral clearance, radial clearance and annular clearance area between an entry body and circular hole.

Threads & entry 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

Diametral clearance2mm
Radial clearance1mm
Annular clearance area65.97mm²

Formula
cr,entry=Dh−De2c_{r,\mathrm{entry}}=\frac{D_h-D_e}{2}

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

Direct answer

What this result means

Calculate diametral clearance, radial clearance and annular clearance area between an entry body and circular hole. The relationship cr = (Dh − De) / 2 ties entry hole diameter and entry body diameter directly to the reported result. The entry body and hole are coaxial circles. Treat the value as a transparent preliminary calculation, then compare it with the actual cable-entry assembly and current product documentation.

Entry Hole Radial Clearance Calculator engineering relationship diagramcr = (Dh − De) / 2 defines the calculation shown here. The entry body and hole are coaxial circles. Keep the entered units with the result so another reviewer can reproduce the method. This dedicated schematic represents entry hole clearance and is not to scale.HOLE CLEARANCE · TOOL 031Entry hole diameterDiametral clearance
Calculator-specific engineering relationship diagram — schematic, not a product drawing, and not to scale.

Formula & theory

Make the assumptions visible.

cr = (Dh − De) / 2 defines the calculation shown here. The entry body and hole are coaxial circles. Keep the entered units with the result so another reviewer can reproduce the method.

Calculation relationship
cr,entry=Dh−De2c_{r,\mathrm{entry}}=\frac{D_h-D_e}{2}

cr = (Dh − De) / 2 defines the calculation shown here. The entry body and hole are coaxial circles. Keep the entered units with the result so another reviewer can reproduce the method.

Formula terms

Variables

DeEntry body diametermm

Use sequence

From measurement to review

  1. Confirm entry hole diameter and entry body diameter from a controlled drawing, measurement or project document.
  2. Apply cr = (Dh − De) / 2 with consistent units and keep the entered values beside the result.
  3. Use diametral clearance only after checking hole tolerance, coating, anti-rotation features, sealing washer and current product drawing.

Limits

What this calculation does not confirm

  • The entry body and hole are coaxial circles.
  • 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 entry hole radial clearance calculator calculate diametral clearance?

The tool applies cr = (Dh − De) / 2 to entry hole diameter, entry body diameter. The entry body and hole are coaxial circles. Keep the displayed units with the result so the calculation can be repeated.

02Calculator guidanceWhat does diametral clearance show for this hole clearance review?

Calculate diametral clearance, radial clearance and annular clearance area between an entry body and circular hole. It is a preliminary engineering value, not confirmation of a cable-gland model, standards compliance or installation approval.

03Calculator guidanceWhat should be checked about hole tolerance before using the entry hole radial clearance calculator result?

The equation does not model hole tolerance, coating, anti-rotation features, sealing washer and current product drawing. 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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