Sheet Metal Scratch Gauge

The compact tr18 expands to 18 46 cm and stores in most tool bags.

Sheet metal scratch gauge.

Pierce holes in wood plastic leather even light gauge metal. The gage is securely locked by a knurled clamp screw and split bushing in the head. Scribe commonplace trim lines on galvanized sheet metal quickly and accurately. 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.

The manufacturers standard gage provides the thicknesses for standard steel galvanized steel and stainless steel. The steel bar features an engraved graduated ruler for making accurate measurements. It is made of steel and the head is hardened. 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.

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. The gauge number 18 holds no relevance to the actual measurements. Two sizes handle a variety of layout applications. A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters.

The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. The tr42 expands to a big 42 107 cm radius. 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.