Let Sino's Lamination Stacks Empower Your Project!
To speed up your project, you can label Lamination Stacks with details such as tolerance, material, surface finish, whether or not oxidized insulation is required, quantity, and more.
Lamination Core Materials
Every core starts as a flat sheet of steel. Which sheet you pick decides three things: how much energy you lose, how cleanly the part punches, and what it costs. Here’s the short guide we give buyers.
Non-Oriented Silicon Steel (NGO)
The default for anything that rotates. Magnetic properties are the same in every direction, which is exactly what you want when the flux is spinning inside the core. 0.35 mm and 0.50 mm cover most 50/60 Hz work. Go thinner — 0.20 mm, 0.27 mm — as the frequency climbs.
Grain-Oriented Silicon Steel (GO / GOES)
Magnetises best in one direction, so it belongs where the flux path is predictable — transformers, inductors, certain linear motors. Higher permeability, lower loss, but don’t ask it to work sideways.
Electrical Steel: Grades and Thickness
We work from 0.10 mm to 0.65 mm and carry grades across the usual loss bands. Thinner steel cuts eddy current losses but costs more to produce and lowers your stacking factor, because more of the stack is insulation instead of iron. For a typical IE4 industrial motor, 0.35 mm is usually the sweet spot.
Nickel-Iron Alloys
High permeability, low coercivity, very low loss at small signals. Current transformers, instrument transformers, magnetic shielding, audio. Expensive — and worth it when the loss budget is measured in milliwatts.
Cobalt-Iron Alloys
The highest saturation flux density of the common soft magnetic materials. You choose this when weight and power density matter more than material cost — aerospace actuators, high-performance servo work.
Amorphous Metals & Nanocrystalline Alloys
Atomically disordered, or ordered only at the nanoscale. Very low hysteresis loss, very high electrical resistivity. They arrive as thin ribbon, they are brittle, and they are hard to form — so they show up in high-frequency, high-efficiency niches where nothing else fits the loss budget.
Soft Magnetic Composites (SMC)
Insulation-coated iron powder, pressed into shape. Lower permeability than stacked steel, but the magnetic behaviour is isotropic and you can build genuinely three-dimensional flux paths. Axial flux and transverse flux designs are where this pays off.
Coatings & Interlaminar Insulation
The layer between the sheets is what stops eddy currents from short-circuiting your core horizontally. We work across the ASTM A976 families: C3 organic for general purpose, C4 and C5 inorganic when the stack has to survive stress-relief annealing. High-temperature aerospace work goes to polyimide and ceramic-filled systems rated 220–250 °C continuous.
Getting the choice right
There’s no universally best grade. There’s the grade that hits your efficiency target, survives your process, and lands inside your budget. Send us the motor spec and we’ll narrow it down — including telling you when the cheaper option is the right one.
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