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HP Series to
measure the
winding density
(hardness) of
textile bobbins,
beams, spools,
cones, dye
packages etc.
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6 different
models with
different ball
sizes and
working faces
are available.
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Constant
pressure system
eliminates false
reading due to
difference
between
operators.
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Ball shaped
indenter
prevents damage
to bobbins.
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Working face
slightly curved
to fit on small
bobbins.
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Special flat
bottom versions
for bobbins with
diameters over
400 mm, such as
warp beams.
HP 2,5:
Ball 2,5 mm Ø
for closely
wound bobbins of
synthetic,
finished fibers
and filaments.
HP 5:
Ball 5 mm Ø for
loosely wound
bobbins of
synthetic
fibers and
closely wound
natural
fibers, yarns
and threads.
HP 5 is the most popular
hardness tester
for average
yarns.
HP 10:
Ball 10 mm Ø for
very loosely
wound bobbins of
thick yarns,
such as carpet
yarns.
HP 2,5- F, HP
5-F and HP 10- F with flat working face for measuring warp
beams and
bobbins
over 400 mm Ø.
HPSA:
hardness of cots,
pressure rollers
and many other
rubber coated
rollers
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