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Kemppi A5 TIG Orbital System 75 Manual

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A5 TIG Orbital System 75© Kemppi Oy 2016 1615
OPERATING MANUAL
1.3.5 Extended collets / combination
Figure: A pair of extended collets
Extended collet is thicker than ush collet, and it extends
wider from the collet frame. Wider or thicker collets can be
made where the extra collet length is extending outward
from the face of the collet frame. The amount of extension
is 18 mm on each side where extended collets are used.
Advantages:
• More stable and more capability for holding both
welded pieces aligned with each other.
• Greater alignment capability due to longer
length.
Disadvantages:
• Takes more space, and may not allow welding in
tight places for example in certain tting-to-tube
welds, depending upon tting type.
• Requires a certain straight length of tube on
which to clamp.
1.3.4 Flush collets
Figure: A pair of ush collets
The outer surface of the collet pair is ush with the outer
face of the collet frame. Flush collets are used for joints
where there is very little straight length between the joint
and an obstruction.
Advantages:
• Enables welding in tight places where there is
not much room for clamping, for example when
welding ttings on a tube or pipe.
• Allows the minimum distance between the
tungsten electrode and an obstruction. For
example, if a tting must be welded there is
frequently only a minimal straight length on the
tting available for clamping.
Disadvantages:
• Less stable and less capability for holding both
welded pieces aligned with each other.
• The thicker or wider the collet, the greater
alignment capability it has to hold the tube
or tting so that both ends of the tubes to be
welded are squarely aligned. Therefore, ush
collets have minimal width alignment of tube
ends.
Figure: A combination of collets
Combination:
• Combination of extended and ush collet pair
can be used for tube-to-tting welding, for
example.
• If your application consists of tube-to-tting
welding but you need greater alignment
capability when mounting on the tube side, use
an extended collet pair on one side of the head
and a ush collet pair on the other
… 7 …


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