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The
Metric Series HTD Belt Drives
Demands for ever increasing powers and
speeds led to the introduction of a Metric
Series of High Torque Drive Belts, using
a parabolic tooth profile to enable increased
tooth contact between belt and pulley. The
new tooth profile has improved shear stress
resistance, increased power capacity, and
reduced noise levels. Pirelli introduced
the RPP belt with an indentation at the top
of the teeth, to allow local elastic
deformation during meshing with pulley, and
easier air discharge to further reduce noise
levels. Cross and Morse combine RPP belts
with standard. Metric pulleys to provide
off-shelf drives in 4 pitches; 3mm (3M),
5mm (5M), 8mm (8M), and 14mm (14M). Further
development created RPP Silver Belts in 8mm
(8S) and 14mm (14S) pitch with double power
capacity; and RPP Gold Belts in 8mm (8G) and
14mm (14G) pitch with treble capacity; both
still operating on standard metric pulleys
allowing full interchangeability with
existing drives. Drives up to 800 KW can
now be transmitted
Metric HTD Belts PDF Catalogue |
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HTD
Timing Pulleys
Cross & Morse HTD Pulleys are manufactured to
close tolerances to ensure concentric running,
and have precision generated gear teeth to match
the high power and speed capabilities of HTD
drive belts. Only high quality materials are
used for pulley manufacture; aluminium being
selected for 3M and larger 5M pulleys to keep
weight and inertia low; all other pulleys
machined from medium carbon steel bar or 260
Grade cast iron and finished with zinc phosphate
for corrosion protection.Standard pulleys are
offered with a large range of tooth sizes
in widths to suit all standard HTD belts.
Pulleys for 5M, 8M and 14M drives are
available with parallel pilot bore for
reworking to customers requirements,
bored for shaft clamping elements, or with
taper bore to be combined with stock
taper bushes for the complete off- the Shelf
drive. Pulleys of non-standard widths or
numbers of teeth can be supplied to order,
or teeth can be generated on customers
own blanks.
HTD Pulleys PDF Catalogue |
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Double
Sided metric Belts
Double-sided belts have teeth equally constructed on each side of the belt,
which enables them to mesh with toothed pulleys on both the inside and outside.
The construction of the belts is basically the same as standard Metric belts,
except that the nylon facing is also on the backing teeth, enabling full torque
transmission from each side of the belt.Standard Double sided belts are available
in three sizes, 5M, 8M, and 14M, all operating on standard HTD pulleys.
Double Sided metric belts PDF Catalogue |
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