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| Side
view of flared holes |
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| Side
view of milled holes |
| Standard range: |
– NO on demand
only
– draws needed |
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| .:: Flared hole
sheets / countersunk holes ::. |
| In this page you can find out flared holes and also
milled holes sheets. |
| A particular kind
of perforation is the one of flared holes sheets. To obtain the
flare, during
perforation process, sheets are not simply perforated but punch, at the
end of its run, creates a
flare more or less deep depending on different kind of holes. With such
perforations sheets are
not simply drilled but the holes are then "pressed down". |
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Classic
of flared perforation.
In this case they are straight rows (at 90°), but can be also
staggered (at 60° or 45°) even at zone on drawing.
Apps: centrifuges, textile & washing machines.
Stds: aluminium, mild steel 1÷3 mm thk.
Else: on demand. |
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Flared holes I7 U25 (Ø 7 mm. pitch 25)
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Antislip
double perforation.
Here you see both flared and plane holes. That's for antislip purpose.
These sheets are made also at zone on drawing.
Apps: staircases, steps.
Stds: aluminium, mild steel 2 mm thk.
Else: on demand. |
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Antislip perforation (holes I8+R8 twin type)
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| Different kind of
sheets are those with countersunk holes where we have not
flared holes but conical.
These sheets must be done in two steps: first by making round holes
perforated sheets then by milling
hole by hole in order to obtain conical
section instead of cylindrical. |
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Conical
perforation.
This is a special perforation made for sugar filters only.
A long work of milling is still done hole by hole manually (cannot be
automated).
Apps: zugar filters.
Stds: mild steel 8÷10mm thk.
Else: on demand. |
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Countersunk hole sheets' (conical holes)
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