Knowledge base
Articles and guides on transformer core cutting
Practical, engineering-level notes from a machine builder: how cut-to-length, slitting and stacking lines work, how to size them, and what the numbers on a datasheet really mean.
Company NewsSREE at Middle East Energy 2026, Dubai: What Transformer Makers Asked Us AboutThree days at Dubai World Trade Centre, stand Z2.G18: what we brought, who came to the stand, and the questions that came up again and again about slitting lines, thin steel and service.Cut-to-Length LinesPeak Speed vs Real Output: How to Estimate Laminations per Hour from a Cut-to-Length LineThe m/min figure on a datasheet is not a production rate. This article gives a simple method to turn strip speed, lamination length and steel thickness into pieces per hour and tonnes per month, with a worked example and the assumptions written out.Core StackingCut-and-Stack Lines: When Combining Cutting and Stacking in One Machine Makes SenseA cut-and-stack line cuts the laminations and builds the core in the same machine, so the pieces are never handled. Here is what that gains, what it costs in flexibility, and how it compares with a cutting line feeding a separate stacking line.Core Shop PlanningFrom Coil to Core: Planning a Transformer Core Shop LayoutA core shop is a flow, not a collection of machines. This article follows silicon steel from the master coil to the finished core, shows where the buffers and the handling belong, and explains which steps are worth automating and in what order.Technical BasicsProcessing Thin CRGO (0.18 to 0.23 mm): What Changes on a Cut-to-Length LineThinner grain-oriented steel lowers core loss but is harder to feed, cut and stack. This article covers what actually changes on the line when you move from 0.27 or 0.30 mm to 0.18 or 0.20 mm, and what to specify so the line copes.Technical BasicsStep-Lap Core Cutting: V-Notches, Yoke Widths and How Many Punch Stations You NeedStep-lap joints and V-notches are what make a cut-to-length line more than a shear. This article explains what the line has to do for a step-lap core and gives the rule we use to decide between one and two V-notch stations.Technical BasicsCutting Tolerances That Matter for Transformer Cores: Angle, Length and BurrThree numbers on a cut-to-length line datasheet decide how good the finished core will be. Here is what each one does to no-load loss, noise and stacking, what the figures should look like, and what to ask a supplier before you believe them.Cut-to-Length LinesStandard vs High-Speed Cut-to-Length Lines: When Does High Speed Pay Off?A high-speed line is not simply a standard line with a bigger motor. The strip never stops, the stations move with it, and changeovers are done by program. Here is what that buys you, and the tonnage rule we use to decide.Cut-to-Length LinesHow to Choose a Cut-to-Length Line Width Class (200 to 1000) for Your Transformer CoresThe width class is the first and most consequential decision when buying a cut-to-length line. Four questions settle it: the widest lamination you build, the holes you punch, the tonnage you run, and the floor you have.Slitting LinesSlitting Line vs Cut-to-Length Line: What Each One Does in a Transformer Core ShopBoth machines cut silicon steel, but in different directions and for different reasons. Here is what a slitting line and a cut-to-length line each do, when a core shop needs both, and how they connect on the floor.Technical BasicsWhat Is a Cut-to-Length Line for Transformer Cores? How a CTL Line Works, Station by StationA cut-to-length (CTL) line turns coils of grain-oriented silicon steel into finished core laminations. This guide walks through every station on the line, what each one does to the strip, and which numbers on a datasheet actually matter.
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