Product Overview
Laminated SmCo Magnets
Laminated SmCo magnets are high-temperature samarium cobalt magnet assemblies made by bonding multiple thin SmCo magnet slices together with electrically insulating layers. Compared with a solid SmCo magnet of the same overall size, a laminated structure can reduce eddy current loss and magnet heating in high-speed, high-frequency and rapidly changing magnetic field environments.
SmCo magnets are known for excellent thermal stability, strong resistance to demagnetization and superior corrosion resistance compared with many rare-earth magnet materials. When laminated, they are especially suitable for demanding motors, generators, aerospace actuators, vacuum equipment and high-temperature drive systems where both low loss and long-term reliability are required.
Ningbo Vanguard Technologies supplies custom laminated SmCo magnets in block, arc, segment, rectangular, ring-sector and special-shaped designs. We support SmCo grade selection, lamination thickness recommendation, insulation material selection, bonding process control, coating or passivation, magnetic testing, dimensional inspection and batch production.
Whether you need laminated SmCo magnets for aerospace motors, high-temperature rotors, vacuum drives, precision servo systems or scientific instruments, Vanguard can provide sample production within 10-20 days after drawing and specification confirmation.
Quick View
Laminated SmCo Magnet Selection Snapshot
Low Loss
Eddy Current Reduction
Thin insulated SmCo slices reduce eddy current heating in high-speed and high-frequency fields.
250-350 °C
High Temperature Stability
SmCo supports demanding thermal, vacuum, aerospace and harsh-environment applications.
Insulated
Bonding Layer Control
Insulating adhesive layers help reduce current paths while maintaining assembly strength.
10-20 Days
Prototype Lead Time
Fast sampling after grade, slice thickness, passivation or coating and drawing are confirmed.
Lamination Design Focus
Thermal Stability
Primary
1Loss ReviewSpeed, frequency, heat
2Grade MatchSmCo5, Sm2Co17, Hcj
3Slice PlanThickness, direction, stack
4BondingInsulation, adhesive, curing
5InspectionSize, flux, insulation
Key Applications
Aerospace Motors
Laminated SmCo magnets support lightweight actuators, high-temperature motors and aerospace drive systems requiring stable magnetic output.
High-Temperature Rotors
Used in high-speed rotors, compressors, turbines and harsh motor environments where temperature rise must be controlled.
Vacuum Equipment
SmCo laminated magnets are suitable for vacuum-compatible drives, scientific instruments and clean environments.
Precision Servo Motors
Low-loss laminated SmCo magnets help improve thermal stability and response consistency in precision drive systems.
Defense & Marine
Stable magnetic performance and corrosion resistance make laminated SmCo useful for demanding defense and marine-related assemblies.
Motor R&D
Custom laminated samples for loss comparison, thermal validation, prototype rotors and electromagnetic design testing.
Typical Lamination Specifications
The following options are commonly used for custom laminated SmCo magnets. Final specifications are confirmed according to working temperature, operating frequency, speed, insulation requirement, coating and assembly method.
|
Item |
Available Options |
Engineering Notes |
|
Magnet Shape |
Block, arc segment, rectangular, tile, ring sector, custom profile |
Shape is customized according to rotor slot, surface-mounted design or magnetic circuit requirement. |
|
Magnet Grade |
SmCo5, Sm2Co17 series, high-temperature custom grades |
Grade is selected according to working temperature, demagnetization margin and target magnetic output. |
|
Slice Thickness |
Commonly 0.5-3.0 mm or custom |
Thinner slices reduce eddy current loss but increase processing complexity and cost. |
|
Lamination Direction |
Thickness direction, width direction, radial direction, custom direction |
Direction should be designed according to eddy current path and changing magnetic field direction. |
|
Insulation Layer |
High-temperature epoxy, insulating coating, ceramic-filled adhesive, custom film |
Insulation quality affects eddy current reduction, bonding strength and thermal durability. |
|
Surface Protection |
Passivation, NiCuNi, epoxy, parylene, phosphate, custom coating |
SmCo often has good corrosion resistance, but coating can be added for special environments. |
|
Inspection |
Dimension, magnetic property, insulation resistance, coating, bonding, appearance |
Inspection records can be provided for prototype validation and mass-production control. |
SmCo Grade & Temperature Selection
|
Grade Series |
Typical Grade Range |
Temperature Capability |
Best Used For |
|
SmCo5 Series |
1:5 SmCo grades |
Approx. 250 °C depending on design |
Compact high-stability magnets requiring good corrosion resistance and moderate energy product. |
|
Sm2Co17 Series |
2:17 SmCo grades |
Approx. 300-350 °C depending on grade |
High-temperature motors, aerospace drives and high-reliability magnetic assemblies. |
|
High-Coercivity SmCo |
Custom high-Hcj grades |
Application-specific |
Applications with high demagnetization risk, wide temperature range or harsh working conditions. |
|
Custom Laminated SmCo |
Project-specific grade and lamination |
Confirmed by design |
Demanding motors requiring both low eddy current loss and high-temperature magnetic stability. |
Selection note: Laminated SmCo magnet design should be confirmed together with operating temperature, electrical frequency, magnet temperature rise, rotor structure, demagnetization margin and lamination direction. Vanguard can recommend grade, slice thickness and insulation structure after reviewing your motor design.
Available Lamination Configurations
Laminated Block Magnet
Stacked rectangular SmCo magnets for precision drives, magnetic assemblies and custom low-loss designs.
Laminated Arc Magnet
Segmented arc magnets for high-temperature rotors, aerospace motors and generator applications.
Radial Lamination
Lamination direction can be designed to reduce eddy current paths in arc or ring-sector structures.
Vacuum-Compatible Design
Material, adhesive and coating can be selected for vacuum or clean-environment applications.
Finished Rotor Magnet Set
Magnets can be supplied by matched set with polarity marking, coating and inspection report for rotor assembly.
Prototype Lamination Kit
Small-batch laminated samples for loss comparison, thermal testing and high-temperature motor validation.
Design Points for Laminated SmCo Magnets
Laminated SmCo magnets must balance high-temperature magnetic stability, eddy current reduction, bonding strength, insulation quality and dimensional accuracy. During design review, Vanguard focuses on SmCo grade, slice thickness, lamination direction, insulation layer, coating, operating temperature, rotor speed and assembly method.
For high-temperature and vacuum applications, adhesive and insulation material selection is especially important. The lamination system should reduce eddy current paths while maintaining stable bonding and low contamination risk under demanding working conditions.
Eddy Current Reduction
Slice thickness and lamination direction are designed to reduce magnet heating under changing magnetic fields.
High-Temperature Bonding
Adhesive and insulation layers are selected for thermal stability, bonding strength and electrical insulation.
Demagnetization Resistance
SmCo grade is selected according to high-temperature operation and demagnetization risk.
Assembly Accuracy
Stack alignment, final dimensions, polarity and coating quality are controlled for stable rotor assembly.
Manufacturing & Quality Assurance
Our laminated SmCo magnet process includes raw magnet inspection, precision slicing, surface treatment, insulation layer application, lamination bonding, curing, final machining when required, coating or passivation, magnetization, dimensional inspection, insulation check, magnetic testing and final packaging.
|
Process Step |
Control Target |
Typical Inspection Method |
|
Magnet Inspection |
Grade, magnetic properties, size and material consistency |
Flux meter, hysteresisgraph data, caliper, visual inspection and batch record check. |
|
Slicing & Preparation |
Slice thickness, flatness, surface cleanliness and edge quality |
Micrometer, height gauge, visual check and drawing-based dimensional inspection. |
|
Lamination Bonding |
Insulation layer, adhesive coverage, stack alignment and curing control |
Process fixture, visual check, insulation check and sample bonding validation. |
|
Coating & Magnetization |
Surface protection, polarity direction and magnetic output |
Coating test, salt spray when required, polarity checker and surface Gauss test. |
|
Final Inspection |
Dimension, appearance, insulation resistance, pull force or flux consistency |
Caliper, micrometer, insulation tester, Gauss meter and final packing checklist. |
Available Custom Features
Custom Shape
Block, arc, segment, rectangular, tile, ring-sector and special-shaped laminated SmCo magnets can be customized.
Custom Slice Thickness
Slice thickness and layer count can be adjusted according to eddy current loss target and cost requirement.
Insulation Layer
High-temperature epoxy, insulating coating and custom bonding systems can be selected by application.
Surface Protection
Passivation, nickel, epoxy, parylene, phosphate and custom protective coatings are available.
Polarity Marking
N/S marking, arrow marking, color marking and matched-set packaging can be provided.
Inspection Report
Dimensional report, magnetic report, insulation report, coating report and batch traceability documents are available.
Information Needed for Fast Quotation
To quote laminated SmCo magnets quickly, please provide magnet drawing, overall dimensions, SmCo grade, lamination direction, slice thickness, layer count, coating or passivation requirement, magnetization direction, working temperature, motor speed or frequency if available, annual quantity and testing standard.
If the design is still under development, you may share the motor type, operating speed, electrical frequency, target temperature rise, available magnet space, vacuum or corrosion requirement and whether the magnet will be used in a surface-mounted or embedded rotor. Our engineering team can help recommend a practical lamination structure.
Frequently Asked Questions
What is the advantage of laminated SmCo magnets?
They reduce eddy current loss and magnet heating while keeping the high-temperature stability and corrosion resistance of SmCo magnets.
Can laminated SmCo magnets work at high temperature?
Yes. SmCo is suitable for high-temperature applications, and the final temperature capability depends on grade, adhesive, insulation layer and coating design.
Can you customize lamination direction?
Yes. Lamination direction can be designed according to the main eddy current path, magnet shape and magnetic field variation.
Do SmCo laminated magnets need coating?
SmCo has good corrosion resistance in many environments, but passivation, nickel, epoxy, parylene or other coatings can be added for special conditions.
Can you provide insulation test data?
Yes. Insulation resistance, dimensional inspection, magnetic data, coating report and batch traceability can be provided according to project requirements.
What is the lead time for custom laminated SmCo magnets?
Prototype lead time is usually 10-20 working days after drawing confirmation. Mass-production lead time is typically 25-45 working days depending on size, grade, lamination structure, coating and testing requirements.
