TRANSDEV CATALOGUE 2018 MARCH.pdf

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TRANSDEV DRAWDOWN BELTS
For Vertical Form - Fill - Seal Machines
Identifiying, Specifying and Ordering
Identifying your Drawdown Belt
Getting the right Drawdown belt for your packaging machine is critical for its operation.
Therefore to help customers identify their existing belts we have detailed the key points to look for.
1. Machined teeth
a. Measure tooth and zone
b. Many belts have tooth
free zones on pulley face
to enable belts to run in
a vacuum bed.
c. Normally a tooth free
zone is central but some
can be off-centre.
2. Holes
a. Measure the hole
diameter on pulley
face and top face.
b. Some holes are
counter sunk - e.g.
Rovema belts.
c. Check pitch of holes.
d. Check if holes in line
with tooth or in gap.
e. Check top surface
for slots and angles;
measure width, length
and depth.
f. If counting the holes
rather than the teeth be
aware that sometimes
the pitch of the holes is
not accurate.
3. Backing
a. Many different backing
types are available.
b. Check hardness of
backing with shore
hardness tester.
c. Check to see if backing
is glued or moulded.
d. If glued, it is normal
for you to see a line
straight across rubber
backing or at a 45
degree angle.
e. Glued belts are
normally marked
with a direction
(running arrow).
4. Construction
a. Check tension member.
b. Look for coiling nose.
c. Look for joint. This will
be a square finger or
sharks tooth shape.
Other Belts
Specifying your Drawdown Belt
Normally as the film slips then the backing wears,
so the backing with the highest grip (co-efficient
of friction) should give the best performance.
Silicone rubber backing can be applied only directly
to PU base belts.
Special hard wearing Bosch belts (with cross slots)
have a yellow PU foam backing with a thin translucent
high grip Silicone coating.
225L100
270L100
240H150
Standard Drawdown sizes
L section 3/8" imperial pitch belt
= 9.525mm pitch
L section 3/8" imperial pitch belt
= 9.525mm pitch
H section ½" imperial pitch belt
= 12.7mm pitch
225 = 22.5" long = 60 teeth.
100 = 1" wide
270 = 27" long = 72 teeth.
100 = 1" wide
240 = 24" long = 48 teeth.
150 = 1½" wide
Ordering your Drawdown Belt
TransDev holds a large stock of Drawdown belts for fast delivery. Glued belts can normally
be supplied more quickly than moulded belts. If the belts are a special size they can generally
be made in small quantities without any tooling. Special sizes of belts which need a moulded
backing may need new tooling. A one-off, inexpensive contribution towards this cost will apply.
Please contact our Sales Office for details.
For the trade we offer contract prices for most popular belts, so that you can supply a small
quantity of belts at very competitive prices. TransDev can also hold stock for customers to calloff,
so that even special constructions of belts can be available on a quick delivery.
T +44 (0)1202 675 555 F +44 (0)1202 677 466 E sales@transdev.co.uk
transdev.co.uk
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