Estimate fit clearance and tolerance range for shaft and hole combinations. Use it as a quick reference when reviewing drawings, machining bores, or checking inspection targets.
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Request a Proposal →For final drawings and inspection, always confirm against ISO 286 tables or the customer specification.
An ISO fit defines the relationship between mating hole and shaft tolerances, such as clearance, transition, or interference.
No. It is a quick estimator. Use official tables or customer drawings for production tolerances.
Clearance means the hole is larger than the shaft. Interference means the shaft is larger and the parts press together.
Use this calculator as a fast reference when reviewing shaft and hole fit conditions before machining or inspection.
Continue with closely related tools from the machining calculator library.
Use the calculator freely. If the result points to a tooling or process problem, we can source the exact carbide tooling you need from vetted factories in China. Compare factory-direct pricing.
Before you commit to a spec, it helps to know what the market pays for it. These are real, publicly listed factory prices — not a quotation, and not a guess.
We source the tool families below direct from vetted Chinese factories, matched to the material and tolerance you just worked out. Every batch ships with its material certificate and dimensional record.
WORKING TO AN ISO FIT? Fits are the specification most often quietly rounded by a low-cost supplier. See the dimensional checks we run on incoming goods.
We source carbide cutting tools from China for job shops. We do not own a factory, which is why we can quote your drawing against two or three plants that actually run your material.
Cutting formulas with the units worked through · Speed and feed starting points for all six ISO material groups · How to read a carbide grade past its ISO code. 12 pages.
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