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Radial Motor Cores
Maison Radial Motor Cores

Radial Stator Lamination Core for Pump Compressor HVAC Motor Servo Drive Electric Vehicle Traction Motor

Radial Stator Lamination Core for Pump Compressor HVAC Motor Servo Drive Electric Vehicle Traction Motor
Radial Stator Lamination Core for Pump Compressor HVAC Motor Servo Drive Electric Vehicle Traction Motor
Radial Stator Lamination Core for Pump Compressor HVAC Motor Servo Drive Electric Vehicle Traction Motor
Radial Stator Lamination Core for Pump Compressor HVAC Motor Servo Drive Electric Vehicle Traction Motor

Radial Stator Lamination Core for Pump Compressor HVAC Motor Servo Drive Electric Vehicle Traction Motor

Radial Motor Core

Shunge Steel manufactures custom radial motor cores in Foshan, Guangdong, China — stator and rotor cores built from stamped electrical steel laminations and stacked to the dimensions your motor design calls for.

The radial flux motor is the cylindrical machine used in the great majority of electric motors. Its stator core is a ring of slotted laminations stacked along the shaft axis, and its rotor core is the matching stack that turns inside it. A radial motor core is therefore a stamped lamination stack: the stamping die, the stacking method and the burr control are what decide whether the finished core performs.

Every core is produced to the customer's drawing. You send us the lamination profile, slot geometry, outer and inner diameter, stacking height, material grade, stacking method and tolerance requirements. We review the design, quote the tooling and produce the cores.

  • Origine du produit :

    CHINA
  • Port d'expédition :

    NANSHA/SHEKOU
  • Paiement :

    TT
Nouveaux produits

Stamping Die and Precision Stamping

Slot geometry, tooth profile and lamination outline are formed by a stamping die. The die determines what the core can be: slot position accuracy, tooth width consistency and profile repeatability all start here, and they do not improve downstream.

We review your lamination drawing before quoting, confirm the die approach, and produce a first article for your approval before running the full batch.

 

Stacking and Fixing

Laminated cores are held together in one of several ways, depending on your design and your own downstream assembly:

  • Interlocking (self-clinching) — the most economical for volume production, with each lamination clinched to the one below
  • Welding — a weld seam along the outer diameter, used where slot area must be preserved
  • Bonding — an interlaminar adhesive that holds the stack without a weld, keeping magnetic properties more uniform
  • Riveting — mechanical fixing for heavier stacks

 

Inspection

Dimensional checks are carried out during production according to the drawing and the order specification: slot profile, outer and inner diameter, stacking height, squareness and burr condition.

 

Radial Core Configurations

Common designs we are asked to produce:

  • Radial stator core — one-piece ring stack, interlocked, welded or bonded
  • Segmented stator core — separate segments for large-diameter stators, assembled or supplied loose
  • Radial rotor core — matching rotor stack, with or without skew
  • Outer-rotor stator core — for external-rotor motor layouts
  • Loose laminations — stamped laminations supplied unstacked, for customers who stack on their own line

Feasibility for your specific design is confirmed at the drawing review stage.

2.4 Material Selection

Radial motor cores are made from electrical steel:

  • Non-grain-oriented electrical steel (NGO / CRNGO) — the standard choice for motor cores, with consistent magnetic properties in all directions
  • Grain-oriented electrical steel (GO / CRGO) — used only where the flux direction is fixed and known; uncommon in motor cores

Lamination thickness affects core loss: thinner laminations reduce eddy current loss at higher electrical frequency, and thicker laminations are more economical where the frequency is lower.

2.5 Technical Specifications

Parameter Value
Core type Radial stator core 
Material Non-oriented electrical steel, grain-oriented electrical steel 
Material thickness 0.2mm / 0.35mm / 0.5mm
Outer diameter Customized to your drawing 
Inner diameter / shaft bore Customized to your drawing
Slot number and slot profile Stamped to your drawing
Stacking height Customized
Stacking method Interlocking / welding / bonding / riveting
Dimensional tolerance 0.02
Interlaminar insulation From the coating on the electrical steel
Surface treatment Deburring, varnish impregnation
Packing Wax paper + carton/wooden case
MOQ Please contact us for the minimum order quantity of your configuration
Lead time Confirmed at quotation

 

 What to Send for a Quotation

To quote a radial motor core we need:

  1. A lamination drawing (2D DWG or PDF) or a 3D model of the core
  2. Slot geometry and slot count
  3. Outer diameter, inner diameter and stacking height
  4. Material grade and lamination thickness, if you have a preference
  5. Stacking method and any rotor features
  6. Dimensional tolerance and burr requirements
  7. Estimated annual or first-order quantity

If some of these are not settled yet, send what you have — we will confirm the remaining points before quoting.

Radial or Axial Flux — Which Core Do You Need?

The two motor families need different cores, and the difference starts with the manufacturing process.

radial flux motor is cylindrical: the flux crosses the air gap radially, the stator is a stack of stamped laminations, and the lamination plane is perpendicular to the shaft. This is the layout used in the majority of industrial motors, pumps, compressors, servo drives and current EV traction motors.

An axial flux motor is disc-shaped: the flux crosses the air gap parallel to the shaft, and the stator is built as a wound core. Our axial flux cores are wound from electrical steel strip with the slots formed by laser.

If you are not sure which one your design needs, send us the drawing and we will tell you which core type it is — and if it is an axial flux design, we will point you to our axial flux stator core.

Applications

  • Industrial motors and pumps
  • Compressors and HVAC motors
  • Servo and precision drives
  • Home appliance motors
  • Electric vehicle traction motors
  • Power tools and garden equipment
  • Fans and blowers

Quality Control

  • Incoming electrical steel checked for grade, thickness and coating
  • First article approved against the drawing before batch production
  • In-process checks on slot profile, dimensions and burr condition
  • Stacking checks on height, squareness and interlocking integrity
  • Final visual and dimensional check before packing

2.10 Packing and Delivery

Cores are packed to protect against rust, moisture and deformation in transit. Rust-preventive wrapping and export packing are used as standard.

2.11 FAQ

What is a radial motor core? A radial motor core is the magnetic core of a radial flux motor, built as a stack of stamped electrical steel laminations. It consists of a stator core, which carries the windings, and a rotor core, which turns inside it. The lamination plane is perpendicular to the shaft.

Are your radial cores laminated or wound? Radial motor cores are laminated — stamped from electrical steel and stacked. Wound construction is used for our axial flux cores, which are a different product line.

Can you manufacture radial motor cores to our drawing? Yes. Send a lamination drawing or 3D model and we will review it, confirm feasibility and quote the tooling and unit price.

What material thicknesses do you use for radial cores?  0.1–0.5mm is available.

What stacking methods can you supply? Interlocking, welding, bonding, riveting.

How do you control burr height? Burr is controlled at the die and checked during production against the agreed specification.

Can you supply loose laminations instead of stacked cores?  Yes — we can supply stamped laminations unstacked for customers who stack on their own line.

What is your minimum order quantity? We support wire-cut samples, with a minimum order quantity (MOQ) of 10 pieces.

How long does tooling and production take? For bulk orders, the mold-making period is typically around 35 days, and the product delivery lead time is approximately 50 days.

Do you provide inspection reports or material certificates?  Inspection is carried out according to the agreed drawing and specification. Please tell us in advance if you require third-party inspection.

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