Manufacturing & Quality
Machining and tolerances for NdFeB magnets
What tolerances are realistic for NdFeB and how to avoid design rework.
Last updated on 2026/01/26
Why tolerances are tricky
NdFeB is brittle and can chip during machining. Overly tight tolerances can increase scrap and cost.
Typical tolerance drivers
- Thickness and flatness requirements.
- Hole features, slots, or chamfers.
- Coating thickness and surface finish.
Best practices
- Mark critical dimensions clearly on the drawing.
- Avoid unnecessary tight tolerances.
- Confirm magnetization direction early.
- Ask for feasibility feedback before finalizing the drawing.
RFQ checklist for tolerances
- Highlight critical dimensions.
- Specify measurement method if necessary.
- Share mating part constraints to guide supplier recommendations.
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Share your drawings, grades, coatings, and quantities. We will coordinate supplier feedback and confirm specs.
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