Sheet Metal Scratch Gauge

Two sizes handle a variety of layout applications.

Sheet metal scratch gauge.

The steel bar features an engraved graduated ruler for making accurate measurements. The needle point scriber easily marks wood plastic hardboard and other materials. Scribe commonplace trim lines on galvanized sheet metal quickly and accurately. Lock the sliding head in place at the desired length and use it as a guide as you drag the scriber along the edge of your work surface.

A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters. The tr42 expands to a big 42 107 cm radius. The gauge number 18 holds no relevance to the actual measurements. Gauge or gage sizes are numbers that indicate the thickness of a piece of sheet metal with a higher number referring to a thinner sheet.

Also known as a marking gauge this scriber draws precise straight lines without the need for a straightedge or ruler. For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter. It is made of steel and the head is hardened. With the general tools and instruments 820 metal marking gage single bar you can easily trace the edge of a flat surface for ripping and cutting.

Pierce holes in wood plastic leather even light gauge metal. The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. Scratch gage tempered steel 6 beam graduated a full 6 by 64ths of an inch this tool is extremely useful for scribing lines parallel to a given surface.