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HEAVY DUTY
REINFORCED
The VAN GORP
®
H•D•R
®
Rims of pulleys 14" in diam-
eter and larger are formed in custom-designed crown-
ing rolls by a cold “forming” process that increases
the strength of the steel. They feature two-rim-half
construction, an exclusive, perfected technique that
permits the use of internal discs in crown and straight
face pulleys...and thereby creates a stronger, more
rounded finished pulley product. End discs are cut to
micrometer calibration. Rims, discs and hubs are all
steel and are fused together by a deep penetrating,
submerged arc welding process with back-up bars
used under the longitudinal rim welds. The result? A
continuously welded drum construction, with its built-in
barrier against dirt, water and steam; less maintenance;
extended pulley service;
and most important, a dra-
matic reduction in radial deformation and longitu-
dinal deflection in the rim.
Radial deformation is a particularly serious problem
when a pulley is used in a low arc of contact and high
tension application. The addition of internal discs, plus
heavier-than-standard construction, not only permits a
VAN GORP
®
H•D•R
®
Pulley to work on any arc of con-
tact, but also increases its moment of inertia...giving it
additional strength and rigidity while decreasing the de-
gree of longitudinal deflection. Pulleys 14" in diameter
and larger, 26"-44" wide have one internal disc; pulleys
46"-64" wide have two internal discs; and pulleys 65"
and wider have three or more internal discs.
H•D•R
®
Conveyor Pulleys
HDR Drum
Pulley Diameter
(Crown) or S (Straight Face)
Face Width
Hub Type and Size
D 24 C 38 XT25
Part Number Example