Description
Add signed thermalChange to matingThickness and subtract freeGap for interference.
A signed fit margin compares available space with an object and explicit allowances. Volume sufficiency, radial gaps, and diametral clearance are different conditions.
Add signed thermalChange to matingThickness and subtract freeGap for interference.
When to use this tool
Use Snapfit Preload Clearance Sign when you need one transparent product fit or travel-margin term.
How to use the tool and how it works
- Enter freeGap, matingThickness, thermalChange. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read interference, preloadPresent. Inspect preloadPresent before interpreting the associated values.
Add signed thermalChange to matingThickness and subtract freeGap for interference. Set preloadPresent only when the effective mating thickness strictly exceeds the gap.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| freeGap | Free Gap | Required. Finite number; minimum 0. |
| matingThickness | Mating Thickness | Required. Finite number; minimum 0. |
| thermalChange | Thermal Change | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| interference | Interference | Required. Finite number. |
| preloadPresent | Preload Present | Required. Boolean. |
{
"input": {
"freeGap": 2,
"matingThickness": 2.2,
"thermalChange": 0
},
"output": {
"interference": 0.20000000000000018,
"preloadPresent": true
}
}Limitations and assumptions
- Positive interference is not a force or stress estimate; stiffness, tolerances, creep, and safe assembly are not modeled.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Check complete three-dimensional geometry, tolerances, materials, and operating conditions before judging actual fit or safety.
References
Similar or alternative tools
- Shaft Hole Clearance Sign
Subtract shaftDiameter from holeDiameter for clearance.
- Latch Overtravel Engagement Margin
Subtract engagementTravel and allowance from availableTravel for margin.