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Pull Force Calculator Magnet Size Selector Magnet Grade Selector Temperature Derating Calculator Demagnetization & PermeanceReal max temperature for your geometry Field-at-Distance CalculatorGauss vs air gap, on-axis Magnet-to-Magnet ForceAttraction, repulsion & stiffness Pot Magnet ForceCup & channel assemblies Magnetic Unit Converter
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Magnetic Coupling TorquePull-out torque & shell eddy loss Hall Sensor Air Gap DesignerWorst-case operate & release margin Multipole & True Radial Ring Arc & Segment Rotor Calculator Halbach Array Visualizer Ring-on-Shaft Fit & StressInterference, thermal, hoop stress Magnetic Shielding CalculatorSteel thickness for a target leakage Tolerance Stack-UpWorst-case & RSS across an assembly
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Magnet Should-Cost CalculatorWhat a part ought to cost, line by line Shipping Compliance CheckerUN 2807 / PI 953 screening Lead-Time Estimator

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Browse All Magnets Search Our Inventory Large Quantity Orders RFQ Builder Bulk RFQ — Paste Your List True Radial Magnets Sensor Magnets Ring Magnets Disk & Rod Magnets Block & Bar Magnets Pot (Mounting) Magnets Halbach Array Ceramic / Ferrite Magnets Alnico Magnets Magnetic Hooks Door Magnets Fabric / Curtain Magnets Fishing Magnets Sold @ Digi-Key
Major Industries Served
Magnets for Medical Devices Magnets for EV & Automotive Magnets for Industrial Automation Robotics & Cobots Wind & Renewable Energy
Process & Heavy Industry
Food Processing & Separation Pumps, HVAC & Magnetic Couplings Oil & Gas Downhole Material Handling & Lifting
By Application
Electric Motors & Rotors Holding & Latching Magnetic Separators Levitation & Bearings MRI & NMR Speakers & Audio
Proof
Case Studies Quality & Compliance Customer Reviews
Core Guides
Magnets 101 Magnets 201 Knowledge Base Magnet Buyers Guide Magnet Buyers Guide for Engineers
Reference
Neodymium Grades & Tolerances Magnet Terminology Glossary Magnet FAQs Technical Resource Hub Compliance Document Center Case Studies
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Magnet News / Articles Videos All Resources
Buying & Sourcing
How to Prepare a Magnet RFQ Magnet Pricing Explained Lead Times, MOQs & Expediting Total Cost of Ownership Tariffs, Duties & Origin
Strategy & Planning
Magnet Category Strategy Should-Cost Modeling Supply Risk & Export Controls Supplier Scorecards Make vs. Buy
Quality & Compliance
Certificates & Compliance Docs Incoming Inspection Tolerances & Acceptance How Magnets Are Tested PPAP for Magnets
Engineering Reference
Neodymium Grades Chart Magnet Material Comparison Magnetization Directions Magnets & Temperature Pull Force & Holding Force Why Magnets Lose Strength
Design & Assembly
Magnet Coatings Compared Arc & Segment Magnets Ring & Annular Magnets Assembly & Retention Design Magnets for Sensors
Design & Calculate
Magnet Designer / Calculator — Advanced Magnet Calculator / Designer — Basic CAD Download Center Designer How-to-Use Guide
Find & Request
Maggie — AI Magnet Search How to Use Maggie Search Our Inventory RFQ Builder Bulk RFQ — Paste Your List
Engineering Calculators
Pull Force Calculator Magnet Size Selector Magnet Grade Selector Temperature Derating Calculator Demagnetization & Permeance Field-at-Distance Calculator Magnet-to-Magnet Force Pot Magnet Force Magnetic Unit Converter
Design Tools
Magnetic Coupling Torque Hall Sensor Air Gap Designer Multipole & True Radial Ring Arc & Segment Rotor Calculator Halbach Array Visualizer Ring-on-Shaft Fit & Stress Magnetic Shielding Calculator Tolerance Stack-Up
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Magnet Should-Cost Calculator Shipping Compliance Checker Lead-Time Estimator Our Free iOS App
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Tolerance Stack-Up Calculator

Check whether a chain of custom dimensions — or a custom magnet against its mating bore — still fits once tolerances are stacked.

Dimension Chain

Dir. Label Nominal Tol. (±)

Stack-Up Result

Total nominal
—
Worst-case range—
Statistical (RSS) range—
Worst-case tolerance (±)—
RSS tolerance (±)—
Worst-case = sum of all tolerances (guaranteed to cover every part, but pessimistic). RSS (root-sum-square) assumes each dimension's tolerance represents a ±3σ limit on a roughly normal, independent distribution — a common statistical-tolerancing assumption, not a guarantee for any single assembly. Use worst-case for safety-critical or low-volume fits; RSS for high-volume production where a small statistical failure rate is acceptable.