Stator laminations and stacks

Specify the material and the finished stack

Sheet thickness alone does not define a stator. Identify the electrical-steel grade, applicable specification and edition, insulating coating and required material documentation. IEC 60404-8-8 addresses thin electrical steel; the purchase specification must identify the requirements that apply to your part.

Distinguish dimensions of an individual lamination from acceptance dimensions of the completed stack. Include the drawing datums, slot and bore features, stack height, joining method and any limits for burrs or damage to the insulation. Mark the interfaces used during winding and final assembly.

Loose laminations, joined stacks or a wider scope

Tell us whether you need loose parts, an interlocked stack or another specified joining method. Include any constraints on welds, adhesive, fasteners or subsequent treatment. A proposed change to the joining process needs review against your design and assembly requirements.

For a wider package, identify the winding, insulation and test scope separately. A quotation for electrical-steel parts does not imply a complete electrically tested stator. Coordinated component sourcing can bring these requirements into one enquiry while keeping responsibility for each deliverable clear.

Compare prototype and series routes

Ask for the sample route and the intended series route to be identified separately. The tooling proposal should state ownership, maintenance responsibilities, approval milestones and how drawing changes are handled. Tooling and setup charges belong in the quotation, separate from recurring piece prices.

Qualification should address the finished stack as well as the supplied material. Agree which characteristics require a first-article report, which are checked per lot and which need assessment in your motor. EMTXI does not assign an efficiency or loss value to an untested assembly.

Build the enquiry around evidence

• Controlled lamination and stack drawings, with revision identifiers

• Steel grade, sheet thickness, coating and applicable material specification

• Joining method and the required delivery state

• Sample quantity, monthly demand and ramp schedule

• Inspection characteristics, report format and acceptance responsibilities

• Required manufacturing-origin evidence and any upstream restrictions

• Delivery location, packaging and target dates

For recurring demand, use a volume programme to agree releases, lot identification and change notification. If origin is a purchasing condition, define it through the required supply-chain stages, rather than the address from which the stacks are shipped.

Buyer questions