01 / Overview
Application Overview
Industrial automation uses permanent magnets in servo drives, linear actuators, couplings, brakes and sensors. Each has a different working point and exposure. The magnet grade and manufacturing tolerances should follow the equipment specification and validation results.
02 / Material
Why NdFeB for Industrial Automation
NdFeB is useful where a motor or mechanism needs high magnetic output within a restricted package. Motor power alone does not determine the material; ferrite and other designs remain candidates where their output fits the system.
03 / Specifications
Key Design Requirements
Magnetic output
Specify the required field, torque or sensor response at the working gap and temperature.
Temperature stability
Use magnet temperature and opposing-field data, including faults and thermal soak, to assess the hot load line.
Production consistency
Agree the field test, sampling plan and lot records needed to avoid adjustments during machine assembly.
Delivery
Confirm tooling, qualification quantity and production lead time in the quote.
04 / Grade Selection
NdFeB grade references for Industrial Automation
These educational references do not establish supply or thermal suitability. Review the actual hot curves, load line, opposing field and duty cycle before selecting a grade.
N38H
120°C class · High Temperature (H)N38H reference: 36–39 MGOe at 20°C, with a nominal 120°C temperature class.
Reference; drawing review required
N42H
120°C class · High Temperature (H)N42H reference: 40–43 MGOe at 20°C, with a nominal 120°C temperature class.
Reference; drawing review required
N45H
120°C class · High Temperature (H)N45H reference: 43–46 MGOe at 20°C, with a nominal 120°C temperature class.
Reference; drawing review required
N42SH
150°C class · Super High Temperature (SH)N42SH reference: 40–43 MGOe at 20°C, with a nominal 150°C temperature class.
Reference; drawing review required
N45SH
150°C class · Super High Temperature (SH)N45SH reference: 43–46 MGOe at 20°C, with a nominal 150°C temperature class.
Reference; drawing review required
05 / Geometry
Typical Magnet Configurations
- Arc segments for BLDC and stepper motor rotors
- Rectangular blocks for linear motors and actuators
- Rings and multi-pole rings for compact servo motors
- Disc and block assemblies for magnetic couplings and brakes
Typical dimensions
Dimensions follow the motor, coupling or fixture drawing; this page does not define a Mainrich size envelope.
06 / Engineering Notes
Design & Procurement Considerations
- 01Confirm applicable material declarations for the finished part and customer market.
- 02Compare quotations for the same material, geometry, inspection and delivery terms.
- 03Agree prototype quantities and lead time after drawing and tooling review.
07 / Resources
Further Reading
Buyer's Guide
Qualifying an NdFeB Supplier for Automotive and Robotics
Agree the quality and technical evidence for the programme, then verify the actual manufacturing and export route.
Technical
NdFeB Magnet Coatings: Specify and Test the Complete System
Compare NiCuNi, epoxy, zinc and parylene against the actual environment, assembly and inspection requirements.
Buyer's Guide
How to Choose a Neodymium Magnet Supplier for Robotics and Servo Motors
Compare suppliers using the actual actuator requirements, sample evidence and production responsibilities.
08 / Compare
Related Engineering Comparisons
Comparison
IATF 16949 vs ISO 9001
A supplier's IATF 16949 and ISO 9001 scopes differ. The customer and product determine which requirements apply.
Comparison
Factory Direct vs Trading Company
Compare the contracting route, access to production records and responsibility for the order.
Comparison
China vs Japan NdFeB Suppliers
Qualify the actual production site and part offer. Country alone cannot establish quality, price or delivery.
FAQ / Questions
Frequently Asked Questions
What NdFeB grade should I evaluate for an automation motor?
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H and SH grades are useful educational references. Select against the actual magnetic circuit, hot curves and duty cycle. A nominal class temperature alone cannot establish that a grade will work.
Can I enquire about small lots for industrial equipment?
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Send the drawing, quantity, grade target and requested delivery date. Prototype quantity, tooling and lead time are confirmed together; the response SLA is separate from manufacturing time.
What documentation should an OEM request?
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Agree material declarations, traceability and inspection records for the application. A supplier's ISO 9001 and automotive IATF 16949 certificates have different scopes. Any required hot curves or batch measurements should be listed in the acceptance plan rather than assumed to appear on every certificate.
Start an RFQ
Request a Quote for Industrial Automation
Share your application, target dimensions, operating temperature, and annual volume. We respond within 1 business day. Grade, production route and inspection requirements are confirmed before a part-specific supply promise.