When purchasing aluminium strip for transformer winding, one important decision is whether to choose slitted or non-slitted material. This choice affects not only your production efficiency but also edge quality, insulation compatibility, and coil precision. Let’s explore the differences between these two formats to help you choose the right one for your application.

What Is Slitted Aluminium Strip?

Slitted aluminium strip refers to aluminium coil that has been cut into narrower widths using high-speed slitting machines. The result is precise, uniform strips—often with rounded or chamfered edges—ready for direct use in transformer winding.

What Is Non-Slitted Aluminium Strip?

Non-slitted aluminium strip typically refers to mill-finish wide coils that have not been processed into custom widths. These coils require further slitting or cutting at the customer’s facility, adding complexity and equipment requirements.

Key Differences

• Edge Quality: Slitted strips have smoother edges, reducing the risk of damaging insulation paper during winding.
• Width Tolerance: Slitted products can be cut to ±0.05 mm tolerance, improving coil consistency.
• Lead Time: Non-slitted coils may save time if customers have in-house slitting capability, but for most, slitted strips are plug-and-play.
• Cost: Slitted strips include processing costs, but they help save time and reduce waste during production.

Which Should You Choose?

If your facility lacks slitting equipment or you want to reduce labor and scrap rate, slitted aluminium strips are the better choice. For high-volume, automated winding lines, pre-slitted material ensures smoother operations and fewer interruptions. Non-slitted coils may be suitable for bulk buyers with flexible processing setups.

Our Slitting Advantage

At Transformer-Aluminium-Strip.com, we provide high-precision slitting services for aluminium foil and strip. With edge treatments, burr-free processing, and tight tolerance control, our slitted aluminium strips are ideal for transformer manufacturers worldwide.

We offer a wide range of options:

• Custom widths from 10mm to 1600mm
• Rounded or chamfered edges for insulation protection
• Paper-insulated or bare strip options
• Standard grades: 1060, 1050, 1350 aluminium