Insert Molding and Magnet Overmolding

Overmold bonded magnet material onto shafts, hubs, bushings, and carriers to reduce adhesive assembly and alignment risk.

Best Fit For:Best for buyers replacing glued magnet assemblies or adding magnetic function to an existing mechanical part.

Insert molded magnet overmolded on shaft

Capability Highlights

Steel shaft, brass insert, plastic carrier, and custom hub overmolding
Mechanical retention reviewed with magnetic datum control
BOM and assembly step reduction for sensor and motor rotors

Typical Engagement Scope

Shaft-mounted rotors
Sensor hubs
Motor rotor assemblies
Encoder rings

Execution Focus

Insert material, surface preparation, pull-out force, and torque retention
Molding pressure and insert positioning during production
Inspection plan for both mechanical and magnetic features

Program Evaluation Matrix

Program Metric	Typical Range	Procurement Value
Retention force	Defined by pull-out, push-out, or torsion requirement	A sensor rotor can pass magnetic testing but still fail if the insert interface moves under load.

RFQ Preparation Checklist

2D/3D drawing, material target, magnetic pattern, and sensing datum
Operating temperature, vibration, media exposure, and lifetime requirement
Sample quantity, tooling target, annual forecast, destination, and PPAP needs
Insert drawing, material, surface treatment, and retention target

Risk and Mitigation

Brittle sintered magnet carried into a vibration-critical assembly: Review bonded magnet material and molded geometry when chipping, cracking, or adhesive failure can affect functional safety.
Magnetic pattern accepted without measurable criteria: Define flux density, pole count, angle error, sensing radius, concentricity, and inspection method before sample tooling.

Buyer FAQ

Can overmolding remove glue from the assembly?

Often yes. Insert molding can combine magnet and mechanical carrier in one molded part, but retention and thermal cycling targets should be defined early.

Related Resources

Insert molded magnet assemblies

Inquiry Email

[email protected]

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Include drawing, material, pole pattern, quantity, and destination.

Instant Chat

+8618857971991

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Direct response from our engineering team.

Program Metric

Typical Range

Procurement Value

Retention force

Defined by pull-out, push-out, or torsion requirement

A sensor rotor can pass magnetic testing but still fail if the insert interface moves under load.

Risk and Mitigation

Brittle sintered magnet carried into a vibration-critical assembly: Review bonded magnet material and molded geometry when chipping, cracking, or adhesive failure can affect functional safety.

Magnetic pattern accepted without measurable criteria: Define flux density, pole count, angle error, sensing radius, concentricity, and inspection method before sample tooling.