New cast hollow bar size range from Sandvik
The recent expansion of the size range for Sandvik
Sanmac, has enabled Sandvik Materials Technology to
compete effectively in the large diameter size area,
where centrifugally cast hollow bar has traditionally held
a strong market share. The new, larger diameter sizes,
between 300mm outside diameter by 200mm inside
diameter and 420mm by
300mm, are produced in
stainless steel grades of
Sandvik Sanmac 304L
and 316L. With improved
machinability benefits of
the Sanmac family of
stainless steels, key properties
like corrosion
resistance and mechanical
strength are fairly maintained.
and are available
from stock in lengths of 3.5 to five metres.
Sandvik has proved that the manufacturing process
for producing centrifugally cast hollow bar dictates that
lower cutting speeds and feed rates must be used—the
two key factors in reducing productivity of machined
components used in valves, pumps, flow meters, fittings
and mechanical seals for the process industries. To
demonstrate the difference in machinability between
Sandvik Sanmac 316L hollow bar and 316L centrifugally
cast material, the company undertook turning tests
on 300mm by 200mm hollow bar material using grade
GC 2025 inserts from sister company Sandvik
Coromant. Sandvik Sanmac material achieved maximum
cutting speeds of up to 290m/minute and a maximum
feed rate of up to 0.7mm/revolution compared
with centrifugally cast material of 180m/minute max
and 0.4mm/revolution max. By reducing feed rates to
0.3mm/rev for both materials, it is possible to increase
tool life to 15 minutes but significantly, Sandvik Sanmac
materials achieve cutting speeds of 200m/minute compared
to 125m/minute with its competitor- an faster
cutting speed of 60 per cent. A key benefit of buying
Sandvik's Sanmac products is that its support extends
beyond the supply of materials. When required, all
products can be supported with technical advice on the
selection of material grades, recommended tool inserts
and cutting data for a range of machining applications.
New generation machines from Hytek
HYTEK introduces the latest generation CNC Press
Brakes and Shearing Machines from Europe. The Press
Brakes are available from 35 to 1000 tonnes capacity. A
wide variety of controller options are available from
DELEM. A facility for control of more than four axes is
also available.
The machines use proportional hydraulics, ensuring
that the exact force required by the job is exerted, thereby
reducing power consumption. Also, for better quality
and accuracy of the product, anti deflection is provided.
The Shearing Machines are offered for cutting sheets up
to 20mm mild Steel. However NC /CNC options are
also available.
Yet another new innovation from Hytex are
Fasteners of various types for fabricators who work
with Sheet Metal. These include a range of Clinch Nuts,
Clinch Studs, Rivet Nuts, Blind Rivets, Nut Sorts etc.
These fasteners are available in sizes from M2 to M 10
and can be used in mild steel, aluminum, stainless steel.
The advantages of them is that they are easy and fast to
install, they require no welding and are not only clean
and aesthetic in appearance but are cost saving as well.
All fasteners are available ex stock.
....CONTD
