Sheet Metal Tolerances Metric

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

Sheet metal tolerances metric.

Stainless steel sheet metal tolerances table chart. But the most accurate way to find out k factor is reverse engineering of a small but same sheet metal sample piece. A tolerance of 48 000 0 125 inches by 96 000 0 125 inches is much quicker to produce and can be done at a lower cost. If the bar is 1 5 thick x 3 5 wide the width tolerance of 0 006 will be the tolerance for the thickness as well which is 0 006.

Width governs the tolerances both width and thickness for rectangle bars. Enter your desired preferred tolerance grade and the nomial size. Sheet metal follows very different rules too where similar features can have completely different tolerance ranges simply because one is across a bend from the other. Mechanical tolerance chart data.

A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters. If the application can still be successful with a wider ranging metal tolerance then that is usually the best option. However there are certain situations that are much more sensitive to disparation. There are standard charts available with sheet metal design handbook for calculating k factor ideally it should be 0 5.

We use an x y and angular micro adjust which allows for a respectable tolerance of 0 020 0 51mm this is more than adequate for most applications. The sheet metal does however have a tolerance on the rolling thickness which needs to be taken into account when designing a tight fitting assembly especially as the sheet metal material gets thicker. The following engineering calculator will show the plus and minus tolerance for the specific iso 286 hole tolerance data. It seems to me the decimal place scheme was developed for machined parts where it is most useful.

For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter. Typically a customer will be satisfied with a certain range on a metal sheet. Sheet metal thickness inch metric suggested sheet metal tolerances hole to hole edge to hole edge to edge fold to hole 024 0 60 fold to fold hole size 003 0 08 0 003 0 000 0 08 0 0 080 2mm 080 2mm fold to edge flange length 1 fold angle angularity feature hardware hole assy item to fold assy item to edge. Sheet metal is manufactured and delivered from the processing mill rolled to the standard thickness that you specify which is now metric.

Table of metric hole tolerances per.