TPT September 2013

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Technology News
92 September 2013
Saw blades for in-line cutting
KINKELDER has developed a smooth
cutting TubeMaster saw blade for orbital
cut off applications. Its special tooth
geometry cuts a large range of thin to
thick wall tubes.
“Key features of this TubeMaster® saw
blade are a special carbide grade and a
high tech PVD-coating,” said Kinkelder
application engineer Leo Molenaar.
“This, combined with a special cutting
geometry, does not require much force
for chip removal, assuring a milled-like
finish of the cut surface. This special
geometry also reduces vibration when
cutting thin wall (<4mm) tubing, thereby
achieving an excellent blade life.”
This saw blade concept allows the use
of one set of blades with medium tooth
pitch to cut tubes with wall thickness from
3 to 9mm, and on some machines even
up to 12mm. For wall thickness of 9 to
30mm, a coarse pitch is defined.
TubeMaster saw blades are available
in diameters from 300 to 420mm for all
types of orbital cutting machines, such
as MTM, Otomills, Elmaksan, Kusakabe,
Linsinger and SMS. Tubes for oil and
gas as well as structural pipes and
hollow sections form a primary market
for TubeMaster saw blades. Even high
hardness materials such as X80 can
be cut efficiently thanks to the type of
carbide used. The PVD coating protects
the tips effectively against the high
temperatures being developed during
the cutting process.
In case of ID-scarfing in the tube
making process, the internal weld bead,
often about 6mm thick solid steel, remains
inside the tube. During cut-off, this inside
wire is caught by the saw, causing a huge
peak load usually on one saw tooth. This
can easily lead to tooth breakage of the
saw blade. Kinkelder started developing
a new saw in 2010, which resulted in the
conception of ScarfMaster® – a carbide
tipped saw blade featuring a very specific
tooth geometry, while tips themselves
are made of a highly shock resistant type
of carbide. The teeth are supported by
a saw body with extra strong shoulders,
which give the combination tooth/body
very high stability and fracture resistance.
“Not only is the blade life of the new
ScarfMaster considerably longer, it can
also cut 50 per cent faster,” emphasised
Mr Molenaar. “Due to this, line speed
can be significantly increased. Also, the
line does not have to be shut down as
often to change the saw blades, which
means better uptime. In all regards,
the new ScarfMaster saws improve
productivity of the tube line, and this
automatically reduces cost of production
per tube length. There is already a
rapidly growing number of enthusiastic
tube manufacturers in the USA,
Spain, Romania and Poland who use
ScarfMaster for their tube lines.”
Kinkelder will attend the EMO
exhibition in September, on stand D-08
in Hall 14/15. Andorinha, the company’s
distributor in Brazil, will attend the
Tubotech Exhibition.
Kinkelder BV – Netherlands
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