Metal laminations – also referred to as electrical steel laminations – are profiled from electrical steels, stacked then bonded to form the core of transformers, or the stator and rotor of electric motors.
Electrical steel laminations are often profiled used stamping. This process can induce residual stress which alters the magnetic permeability of electrical steels, and causes burrs which can cause problems during winding.
As a non-contact, non-heat inducing machining process, chemical etching does not alter the properties or magnetic permeability of electrical steels. This ensures burr- and stress-free laminations can be manufactured with zero distortion.
Etched laminations are extremely accurate and concentric, achieving tolerances to ±0.025mm.
Chemical etching can be combined with wire EDM for even greater precision to ±0.005mm.
Prototype to volume – fast
As etching uses digital tooling, prototypes can be produced in days, not months. We supply one-off loose lamination prototypes and stacks up to 600mm in diameter to your specification – fast
Benefits at a glance
- Low-cost tooling/design iterations
- Flat, stress-and burr-free
- Prototype to volume – fast
- Accuracy to ±0.005mm
- Electrical steels, silicon steels and nickel-iron alloys
- R-Bond technique for insulation and bonding
- Stator and rotor laminations for motors and generators
- Segmented laminations
- T-segment laminations