In 3 steps to your individual offer for stator laminations

Select the desired material, the quantity and the sheet thickness. If you already have a technical drawing, attach it right away. Then we only need your contact details and we will send you an individual offer for your stator laminations! If you need several blanks, you can simply submit the order form several times.

1. select material

2. Upload file attachment

3. provide contact information

Telephone consultation: +49 391 598184 70

Email: anfrage@teprosa.de

Materials/materials for stator laminations or electrical laminations

Electrical sheet is made of iron-silicon alloy and is divided into grain-oriented and non-grain-oriented materials. The starting material is manufactured as cold-rolled strip. It has special physical properties and belongs to the soft magnetic materials. Non-grain oriented electrical steel is classified by DIN EN 10106. A large number of standard grades exist for use in electrical systems, motors and machines. Here is an overview of the materials we process at TEPROSA:

M235-35A
M270-35A
M330-35A
M235-50A
M270-50A
M330-50A
M530-50A
M400-65A
M800-65A
NO20-15
Other electrical steel grades on request

Manufacturing conditions

Our manufacturing conditions for laser cutting

Minimum kerf width/minimum spot diameter: 0.03 mm*
Repeat accuracy ±2µm
Micro-bridges from 0.03 mm (small connection between contour and sheet to anchor the blanks in the sheet composite)
Cutting speeds up to 50mm/s
Cutting gas support up to 25 bar
Nitrogen
Oxygen
Contour accuracy: ± 0.01 mm*

*Depending on the material/material and its thickness.

Individual manufacturing & materials

You do not find your material in our overview? We are also happy to process material provided by you or procure appropriate materials. On request, you will receive all materials with the corresponding material test certificate.

Information for buyers

We are specialized in business 2 businesst. Upon your request, you will promptly receive a written quote that takes into account all technical requirements. Here you will find further links and helpful information for buyers:

Request without CAD data

We will gladly take over the data creation for you! Simply send us a corresponding drawing or the geometric data of your rotor plate. Our experts will then contact you immediately.

Confidentiality & Data security

We guarantee the security of your data – if you still need a nondisclosure agreement in advance, you can >download our nondisclosure form here. We would also be happy to review your in-house agreement. To do so, please simply send it to us by e-mail at: einkauf@teprosa.de.

We take confidentiality and data security very seriously! If you would like to enter into a nondisclosure agreement, send us your form or download our template.

Stator sheets from electrical steel strip for prototypes and small series

We cut stator sheets (electrical sheets) for the construction of stators for electrical devices and electric motors. The stator is the rigid part of the electrical system. Due to its flexibility, speed and cost-effectiveness, laser cutting is particularly suitable for the production of stators. We focus on prototypes and small series. With our cutting systems, we manufacture stator laminations with the highest quality and tight tolerances up to a maximum diameter of 1,000 mm.

Laser cutting of stator laminations – Fast, precise and economical

Stator laminations (also sheet laminations) are made from electrical sheet or electrical steel. Electrical sheet is a special iron-silicon alloy. Due to its special properties, the use of laminations made of electrical steel strip for the production of magnetic cores (also stator pack or stator cores) leads to a significantly improved energy efficiency of electrical systems and thus to a sustainable use of resources.

A distinction is made between the different cold-rolled strips according to their properties into grain-oriented and non-grain-oriented materials. TEPROSA manufactures laser-cut stator laminations, laminations, as well as finished stator packages for prototypes and small series.

The advantages of laser cutting with regard to stator production are found particularly in its cost-effectiveness, in addition to the flexibility of the process. Since there are no tooling costs involved in laser cutting and setup costs are low, production is cost-efficient even for very small quantities. The exact laser beam guidance, the high power density and a high cutting speed enable highly precise contour accuracies of ± 0.01 mm, exact, almost right-angled cut edges and clean cut surfaces when using the appropriate cutting gases.

Depending on the material thickness, narrow kerfs of 0.03 mm are also possible. Furthermore, in contrast to alternative cutting processes such as punching, laser cutting results in only very minor structural changes at the cutting edges.

Your supplier for stator laminations

TEPROSA GmbH has specialized for many years in the production of sophisticated, precisely fitting laser parts of exceptionally high quality. In the field of electrical sheet, we manufacture individual stator cores, cores for stators and rotors, as well as entire sheet packages (stator or rotor packages) from various steel grades. We process grain oriented electrical steel for generators, transformers and other electrical machines.

As a long-standing supplier to various OEMs, the quality of our work is particularly important to us. Therefore, we work according to uniform processes and thus ensure consistent quality and complete traceability of each individual production step.

Coatings for insulation

To prevent short circuits between the laminations in electrical steel laminations and thereby reduce eddy currents, various coatings are applied to the strip. The coating thicknesses vary from 1 to 4 µm. Depending on the processing technology and subsequent application, coatings exist for better corrosion protection, improved insulation of the individual layers, heat resistance, improved punching properties or weldability.

Coating C3 – coating for improving the lubricating effect. Relevant, for example, for the stamping process.

Coating C4 – Coating to improve corrosion protection and insulation resistance.

Coating C5 – coating to optimize the temperature resistance. Relevant e.g. for stress relieving after the stamping process.

Coating C6 – Coating for a particularly high insulation resistance.

Back coat – coating as a bonding technology for sheet metal packages.

Our laser technology

For laser cutting we used state-of-the-art fiber lasers from various manufacturers that allow contour accuracies of ± 0.01 mm. Fiber lasers provide excellent beam quality, deliver low thermal input, and thus enable high-precision laser cutting with low distortion and clean, virtually burr-free cut edges.

The pumped solid-state lasers generate a laser beam in the mid-infrared range with a wavelength of 1,070 nm, which is directed onto the material to be processed via a so-called fiber and a fixed optic by CNC system, or via a movable scanner optic (galvo system). In comparison, the wavelength of most CO2 lasers, which show their advantages in the processing of materials such as wood, cardboard or textiles, is in the range of 10,600 nm.

Stator Core