Engineering Toolkit
Free tools to spec, select and troubleshoot rubber seals
Built by Harkesh engineers — find sizes, check chemical compatibility, run groove and diaphragm calculations, and diagnose failures. When you are ready, turn any result into a quote in one click.
Reference
Reference
O-Ring Size Finder
Search 400+ AS568 and ISO 3601 metric O-ring sizes by dash number, ID, OD or cross-section — with tolerances.
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Seal Unit Converter
Convert inch ↔ metric, derive OD/ID/CS relationships and look up durometer (Shore A) ranges instantly.
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Material Comparison
Compare 13 elastomers side by side — temperature range, hardness, chemical resistance, compression set and cost.
Open toolCompatibility
Compatibility
Chemical Compatibility Checker
Pick a chemical to see how every elastomer rates against it, or pick a material to see its chemical resistance.
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Material Selector
Filter elastomers by temperature, media and budget to get a ranked shortlist for your sealing application.
Open toolCalculators
Calculator
O-Ring Groove / Gland Calculator
Enter your groove dimensions to get squeeze %, gland fill % and stretch % checked against design guidelines.
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Diaphragm Force Calculator
Calculate effective area, thrust force and convolution radius for rolling diaphragms — a Harkesh specialty.
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Volume & Weight Estimator
Estimate part volume, weight (per compound density) and relative cost tier to scope a quote in seconds.
Open toolGuidance
Guidance
O-Ring Failure Diagnosis
Match what you see on a failed seal to likely failure modes, root causes and proven fixes.
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Application Fit Finder
Answer a few questions about your application and get a recommended material and seal direction.
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Custom Seal RFQ Wizard
A guided intake for custom seals and diaphragms — specs, tolerances and quantities routed straight to engineering.
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