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This
patented spiral is the best low cost EMI gasket solution. The
spiral is wound out of spring temper stainless steel for excellent
spring memory and compression set resistance. The stainless
steel spiral exhibits moderate to high shielding properties
at a very low cost. See below for ordering
information.
Application Information
The low cost and moderate shielding of this gasket offer an
excellent solution for meeting FCC and European Community EMI
requirements. Combining it with a die-cast or molded “pinch
boss” groove gives you the optimal price/performance combination. Contact
us for design details.
Materials:
Spiral: Stainless steel. Refer to Material
Specifications for more information.
Shielding Quality:
This gasket offers shielding quality in excess of 95 dB at 1
GHz. The shielding quality may vary depending on the specific
application. Refer to Shielding
Quality for more complete performance data.
Compression Force:
Quick-Shield gaskets come in three different resiliencies (as
shown below). Optimal compression of the gasket is 25% of the
diameter of the spiral. Since the force to compress the gasket
is a function of the cube of the thickness of the stainless steel
ribbon, the compression forces shown are approximate.
Standard Force: ~30 pounds per linear inch compression.
Moderate Force: ~10 pounds per linear inch compression.
Low Force: ~1.5 pounds per linear inch compression.
Mounting:
This gasket is groove mounted. Refer
to Groove Mounting Techniques
for detailed mounting information.
Available Options
Cord Insert:
To keep costs low, we recommend you omit the cord usually used
in the spiral. However, if over-compression of the gasket is
a concern or problem, remove the “NC” from the part
number on the moderate and low force series gaskets.
Example: NM-06 NC will come without a cord. NM-06 will include
cord.
All Standard Force gaskets come without cord (no NC required).
Custom Sizes:
We can manufacture Quick-Shield gaskets in any size diameter,
from .034” up to approximately 1.5”. There are
no special tooling charges involved, but the functional length
of the part may be short at very large diameters. Please contact
us with your requirements.
Plating:
For plating options, see Ultra Quick-Shield.
Ordering
Information:
Quick-Shield is sold by the foot and typically packaged on spools
except in small quantities. It can also be ordered cut-to-length
in specific sizes at a low cost, or you can cut it yourself using
a sharp pair of scissors. Custom o-rings are also available.
(See
Custom Gaskets
for more information.)
Quick-Shield
Part Numbers
(Stainless Steel)
|
Recommended
Groove Dimensions |
| Diameter |
Standard*
Force |
Moderate
Force |
Low
Force |
Depth
(L)
+.002"
-.000" |
Width
(G)
+.007"
-.005" |
Width (W)
+.000”
-.002” |
| .034" ± .002" |
NI-02 |
-- |
-- |
.023" |
.046" |
.033” |
| .047" ± .002" |
NI-03 |
NM-03 NC |
-- |
.035" |
.063" |
.045” |
| .063" ± .003" |
NI-04 |
NM-04 NC |
NL-04 NC |
.046" |
.094" |
.060” |
| .070" ± .003" |
NI-.070 |
NM-.070 NC |
NL-.070 NC |
.053" |
.094" |
.067” |
| .078" ± .003" |
NI-05 |
NM-05 NC |
NL-05 NC |
.059" |
.109" |
.075” |
| .094" ± .004" |
NI-06 |
NM-06 NC |
NL-06 NC |
.070" |
.125" |
.090” |
| .103" ± .004" |
NI-.103 |
NM-.103 NC |
NL-.103 NC |
.077" |
.141" |
.099” |
| .109" ± .004" |
NI-07 |
NM-07 NC |
NL-07 NC |
.082" |
.156" |
.105” |
| .125" ± .004" |
NI-08 |
NM-08 NC |
NL-08 NC |
.094" |
.171" |
.121” |
| .139" ± .005" |
NI-.139 |
NM-.139 NC |
NL-.139 NC |
.104" |
.187" |
.134” |
| .141" ± .005" |
NI-09 |
NM-09 NC |
NL-09 NC |
.105" |
.187" |
.136” |
| .172" ± .005" |
NI-11 |
NM-11 NC |
NL-11 NC |
.128" |
.234" |
.165” |
| .187" ± .006" |
NI-12 |
NM-12 NC |
NL-12 NC |
.140" |
.250" |
.181” |
| .250" ± .007" |
NI-16 |
NM-16 NC |
NL-16 NC |
.185" |
.343" |
.240” |
| .312"
.009" |
NI-20 |
NM-20 NC |
NL-20 NC |
.234" |
.422" |
.300” |
See our Part
Number Matrix for assistance with part numbers, options
and product comparisons.
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