Sheet Metal Scratch Gauge

The gauge number 18 holds no relevance to the actual measurements.

Sheet metal scratch gauge.

Scribe commonplace trim lines on galvanized sheet metal quickly and accurately. 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. 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 equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters. For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter. Also known as a marking gauge this scriber draws precise straight lines without the need for a straightedge or ruler.

The tr42 expands to a big 42 107 cm radius. Pierce holes in wood plastic leather even light gauge metal. Two sizes handle a variety of layout applications. The needle point scriber easily marks wood plastic hardboard and other materials.

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. The manufacturers standard gage provides the thicknesses for standard steel galvanized steel and stainless steel. The compact tr18 expands to 18 46 cm and stores in most tool bags.