Bepto
EN
ENEnglish繁中繁體中文ESEspañolARالعربيةFRFrançaisITItalianoPTPortuguêsRUРусскийDEDeutschJA日本語VITiếng ViệtKO한국어THไทยTRTürkçe
Request a Quote
EN
ENEnglish繁中繁體中文ESEspañolARالعربيةFRFrançaisITItalianoPTPortuguêsRUРусскийDEDeutschJA日本語VITiếng ViệtKO한국어THไทยTRTürkçe

AI Search

Tell us in one sentence about your application or question to search related products, technical articles and calculators.

Engineering Calculator · 076

Thermal Clearance Margin Calculator

Estimate final radial or diametral clearance after differential thermal expansion of a component and housing.

Thermal & material change
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

Differential expansion-0.05mm
Estimated final clearance0.55mm
Clearance change0.05mm

Formula
C1=C0−(αcDc−αhDh)ΔTC_1=C_0-(\alpha_cD_c-\alpha_hD_h)\Delta T

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

Direct answer

What this result means

Estimate final radial or diametral clearance after differential thermal expansion of a component and housing. The relationship C1 = C0 − (αcDc − αhDh)ΔT ties initial clearance, component diameter, housing diameter, component coefficient, housing coefficient and temperature change directly to the reported result. Both diameters experience the same uniform temperature change. Treat the value as a transparent preliminary calculation, then compare it with the actual cable-entry assembly and current product documentation.

Thermal Clearance Margin Calculator engineering relationship diagramC1 = C0 − (αcDc − αhDh)ΔT defines the calculation shown here. Both diameters experience the same uniform temperature change. Keep the entered units with the result so another reviewer can reproduce the method. This dedicated schematic represents thermal clearance margin and is not to scale.CLEARANCE CHANGE · TOOL 076Initial clearanceDifferential expansion
Calculator-specific engineering relationship diagram — schematic, not a product drawing, and not to scale.

Formula & theory

Make the assumptions visible.

C1 = C0 − (αcDc − αhDh)ΔT defines the calculation shown here. Both diameters experience the same uniform temperature change. Keep the entered units with the result so another reviewer can reproduce the method.

Calculation relationship
C1=C0−(αcDc−αhDh)ΔTC_1=C_0-(\alpha_cD_c-\alpha_hD_h)\Delta T

C1 = C0 − (αcDc − αhDh)ΔT defines the calculation shown here. Both diameters experience the same uniform temperature change. Keep the entered units with the result so another reviewer can reproduce the method.

Variables

DcComponent diametermm
DhHousing diametermm
αhHousing coefficientµm/m·K
ΔTTemperature changeK
ΔCDifferential expansionmm
C1Estimated final clearancemm

Use sequence

From measurement to review

  1. Confirm initial clearance and component diameter from a controlled drawing, measurement or project document.
  2. Apply C1 = C0 − (αcDc − αhDh)ΔT with consistent units and keep the entered values beside the result.
  3. Use differential expansion only after checking diameter/clearance convention, material data, constraints, tolerances and temperature distribution.

Limits

What this calculation does not confirm

  • Both diameters experience the same uniform temperature change.
  • 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.

Related articles

Continue the check

View all 130 calculators
075

Differential Thermal Expansion Calculator

Compare free linear expansion of two materials over one reference length and temperature change.

Open calculator →077

Conductive Heat Flow Calculator

Estimate steady one-dimensional conductive heat flow, thermal resistance and heat flux through a flat layer.

Open calculator →078

Surface Heat Flux Calculator

Calculate average heat flux from total heat flow or dissipated power and exposed surface area.

Open calculator →

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 thermal clearance margin calculator calculate differential expansion?

The tool applies C1 = C0 − (αcDc − αhDh)ΔT to initial clearance, component diameter, housing diameter, component coefficient, housing coefficient, temperature change. Both diameters experience the same uniform temperature change. Keep the displayed units with the result so the calculation can be repeated.

02Calculator guidanceWhat does differential expansion show for this clearance change review?

Estimate final radial or diametral clearance after differential thermal expansion of a component and housing. It is a preliminary engineering value, not confirmation of a cable-gland model, standards compliance or installation approval.

03Calculator guidanceWhat should be checked about diameter/clearance convention before using the thermal clearance margin calculator result?

The equation does not model diameter/clearance convention, material data, constraints, tolerances and temperature distribution. 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