On 2014-05-04, wrote:

Tell me clearance in mm & for tickness of the material in mm also. Please.

I presume that you have the shear with instructions which
include clearances in thousandths of an inch, and thickness (not
"tickness" as you asked) in either also thousandths of an inch, or as a
gauge.

To convert thousandths of an inch to mm, you simply multiply by
25.4.

As for converting the gauge to a metric value, you will need a
look-up chart. The only one which I happen to know directly (and which
is a common maximum thickness of steel for hand operated shears) is 16
ga, which (mostly by accident) is very close to 1/16" of an inch, or
0.063" or 1.58 mm Larger gauges are thinner, so the match can only occur
at one point.

The clearance values are likely somewhat different depending on
the brand and model of shear -- and how strong it is.

The only mention for the DiAcro #12 and #24 shears is that the
clearance is defined by the thickness of the blade, and if you grind it
thinner, you will need to add shim stock to restore the thickness.

For the DiAcro #36 hand shear it says:

================================================== ====================
Blade clearance may be varied but for longer
blade life, a few thousandths clearance should be
maintained. Blades should not be in actual con-
tact with each other. Best results may generally
be obtained with .002" clearance on the ends
and .001" clearance at the center.
================================================== ====================

And -- from the calculation above, 0.001" is 0.0254 mm, and
0.002" is 0.0508mm. And elsewhere, they mention that this setting should
work from the thinnest metals to 16 ga (from above, about 1.5mm)

Good Luck,
DoN.

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