SPC Home >> Frequently Asked Questions
1. Why us?
1. What are the common uses?
2. Who's using perforating?
1. What factors affect product quality,
cost, and delivery?
1. Stainless Steel
2. Galvanized Steel
3. Cold-Rolled Carbon Steel
1. Sheet to Sheet
2. Coil to Sheet
3. Coil to Coil
As your perforating specialist, our entire production
process is dedicated to perforating metal and its related
operations. Just consider how much is at your disposal:
Our modern, high-speed electronically controlled presses
can make holes as fast as 300,000 per minute, all with
extreme accuracy.
We can do all of this in nearly every type of material,
in thickness from .010"to .156", in sheet
sizes as wide as 60" that readily accommodate and
coil up to 20,000 lbs., efficiently perforated and rewound.
Extensive banks of tooling capable of perforating round
holes, square holes, rectangles, triangles, slots and
a wide variety of odd-shaped holes in hundreds of patterns.
Hole sizes can be as small as .02" to 2" in
diameter.
We also have the necessary follow-up operations. One
example is roller leveling, which removes the distortions
in the metal that the perforating process leaves behind.
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Perforated metals can be readily found everywhere. They
can be used as filters, screens, and guards, as well
as for their aesthetic appeal in architecture and design.
They can also control the passage of heat, liquids,
light, air, solids, sound and electromagnetic waves.
Because of these qualities, perforated metals have applications
such as grain bin floors, grain drying equipment, clothes
washer and dryer drums, speaker covers, microwave ovens,
automotive grills, exhaust components, airplane engine
silencers, acoustical applications, filtration and many
others.
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Pratically every industry has some use for perforating.
To name just a few: aerospace, agriculture, appliance,
automotive, construction, electronics, furniture, marine,
medical, mining, petrochemical, retail, security, and
telecom.
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Quantity - Setup costs, raw materials, packaging
and freight is reduced as quantities increase.
Material type - Remember the least expensive material
may not be the lowest cost, a higher strength alloy
may allow reducing thickness. Keep hardness below 80
Rb.
Material thickness - Thinner materials perforate easier
and faster.
Hole shape and pattern - Round holes are the most economical,
60° degree staggered round hole pattern strongest
and most versatile.
Hole size - Do not go below 1-to-1 ratio with sheet
thickness. Stay at 2-to-1 or larger if possible.
Bar size - Do not go thinner than 1-to-1 ratio with
sheet thickness.
Center distance - It controls feed rate and thereby
the production rate. If possible, choose a pattern with
longer center distance.
Open areas - Extreme open area proportions tend to increase
distortion; if possible, stay under 70%.
Margins - Keep side margins to a minimum to reduce distortion.
Use standard Unfinished End Margins if you can.
Tolerance - When possible loosen tolerances; the tighter
the tolerance means more value added processes.
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Unlike carbon steel, stainless steel is non-corrosive.
It comes in 3 groups:
Austenitic stainless steels are hardened only by cold
working. Non-magnetic.
Ferritic stainless steels are only moderately hardened
by cold working. Magnetic.
Martensitic stainless steels are can be hardened by
heat treatment. Magnetic.
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Mill-coated with zinc, galvanized steel offers protection
from corrosion concerns that may arise from ordinary
carbon steel.
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Carbon steel coil that has been roller leveled to after
it has already cooled. This type of material is desirable
for its uniformity in thickness, improved surface finishes,
and availability in thinner gauges.
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Perforated sheets produced from sheets. Options include
margins and blank areas in addition to full perforation.
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Perforated sheets produced from coil. This is the most
popular product due to its flexibility in both design
and handling.
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Perforated coils produced from coil. Its production
is generally faster than perforating sheets, and it's
usage is common by original equipment manufacturers
with automated production operations.
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800.752.1717