Sheet Metal Scratch Gauge

Scribe commonplace trim lines on galvanized sheet metal quickly and accurately.

Sheet metal scratch gauge.

Two sizes handle a variety of layout applications. 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 equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. 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.

For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter. A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters. The compact tr18 expands to 18 46 cm and stores in most tool bags. The needle point scriber easily marks wood plastic hardboard and other materials.

The tr42 expands to a big 42 107 cm radius. 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. Pierce holes in wood plastic leather even light gauge metal. It is made of steel and the head is hardened.

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. The gage is securely locked by a knurled clamp screw and split bushing in the head.