SG-W12 Wire Binding Machine

The SG-W12 is a wire binding machine listed on the company website. Wire binding gives documents a neat, professional edge and lets them open flat, which suits reports, proposals, presentations and training manuals in offices and copy centres. The SG-W12 is sized for A4 documents, the standard office paper size.

The specification values below are transcribed from the specification table published on the company website's product page for this model. The product page carries no prose description beyond the table, so this page adds no feature claims for the machine.

Specifications

Transcribed from the specification table on the company website's product page for the SG-W12.

Reading the Specifications

Maximum punching thickness of 12 sheets describes how many sheets the machine punches in one lift. For a 140-sheet document, the operator punches the document in a dozen or so lifts and then binds the whole stack at once. That split between punching capacity and binding capacity is normal for wire binders: punching is the slower step, and binding is done in a single closing action.

Maximum binding thickness of 140 sheets describes the thickest document the machine binds. That covers most office reports and manuals, which rarely exceed a hundred sheets. Thicker books need a larger machine or a different binding method, such as perfect binding.

Maximum binding width below 300 mm, marked A4, means the machine handles A4 documents in portrait orientation. A4 is 210 mm wide, so the figure leaves room for the punched margin and the machine's edge guides. It does not mean the machine binds A3 documents.

Thirty-four punching dies at a 3:1 pitch describe the hole pattern: 34 holes along the A4 edge, with three holes per inch. The 3:1 pitch is the common office standard for wire binding, and wire diameters for 3:1 binding are chosen to match the document thickness. Margins of 2.5, 4.5 and 6.5 mm let the operator set how far the holes sit from the edge, which matters for documents with printed matter near the edge.

Working With 3:1 Wire in an Office

In an office, wire binding usually follows a simple routine. The document is printed and collated, punched in lifts of up to the machine's listed punching thickness, hung on the wire, and closed. Because punching is done in lifts while binding is done in one action, the punching step sets the pace for the job, and a thick document takes several lifts before it is ready to close.

Choosing the wire is the step that most affects the finished look. Wire diameter follows the document thickness, and suppliers publish charts matching wire size to sheet count for each pitch. For the SG-W12, the pitch is 3:1, so the chart to use is the 3:1 chart, and the wire must be 3:1 wire. Using 2:1 wire on a 3:1 punch pattern will not thread, and using the wrong diameter will leave the book loose or over-tight.

Margins of 2.5, 4.5 and 6.5 mm let the operator move the holes away from the edge. A larger margin suits documents with printing near the edge, because it keeps the holes clear of the print. A smaller margin suits documents with a generous white edge, because it keeps the binding compact. Set the margin once for a document type and keep it consistent across the run, so that every copy looks the same.