Platinum Belt Design Manual - Jason Industrial

POWERING GLOBAL INDUSTRY
The new PLATINUM belt has a near universal curvilinear tooth profile that will fit in the majority of the pulleys that
are available on the market today. This does not present a problem when replacing belts on existing drives.
However, caution must be used when choosing the pulley for new drive applications because of the increased
power capability of Platinum belts. Older pulleys may not be designed to carry the higher power that Platinum
belts can transmit. Jason/Megadyne recommends using only pulleys with verified power capacity. Pulleys
compatible with Platinum belts are available through Jason Industrial. The dimensions and specification are shown
in the following tables:
Pulley Nomenclature:
PLATINUM
PULLEYS, FLANGES &
IDLERS
PULLEYS
Standard pulleys should not be operated with a rim speed of over 6500 ft/min. When the rim speed is in excess of
6500 ft/min, malleable materials should be used in their construction. Consult Jason Engineering or the pulley
manufacturer for recommended materials for the drive’s rim speed.
FLANGES
Flanges are normally placed on the driver pulleys. At least one pulley in the drive must have a set of flanges or two
pulleys can have a single flange on opposite sides. Because of the way that timing belts are constructed there is a
natural tendency for the belts to track to one side. Without being contained by flanges, the belts can walk off the
drive. Timing belts are normally constructed using pairs of cords. Each cord is twisted in a different direction to
lessen the tendency to track. However, the tendency is never completely eliminated. Flanges are recommended on
both driver and driven pulley when the center distance exceeds 8 times the pitch diameter of the smallest pulley.
The use of idlers is only recommended when necessary to tension the drive or increase wrap on the smaller pulley.
Every pulley in the drive wears on the belt and shortens service life.
Idler Guidelines:
IDLERS
• The idler diameter should not be smaller than the smallest driven pulley
• Idlers may be placed inside or outside the belt, but inside placement is recommended
• Outside idlers must be flat faced (not crowned)
• Inside idlers must be toothed
ENVIRONMENTAL CONSIDERATIONS
Temperature Range: Continuous operation
Intermittent Excursions
-31°F (-35°C) to 239°F (115°C)
266°F (130°C)
Static Conductive: PLATINUM belts do not dissipate electrical charge that may build up in operation.
RoHS Compliance: PLATINUM belts comply with EU regulation 2002/95/CE (RoHS) and 2002/96/CE (WEEE).
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