12 / 44
12
Mine Duty Drum
Pulley Diameter
Crown Face
Face Width
Hub Type and Size
MD 24 C 57 XT45
Part Number Example
Mine Duty drum pulleys were originally designed for the
underground coal industry for longwall mining. Longwall
conveyors have belt tensions that change depending on
the varying length of the conveyor. The conveyor gets
longer as it is extended along the cut in the coal seam.
The uncertainty in the loading conditions leads to a
conveyor pulley design that is actually stronger than the
shaft it is mounted on.
Because of their heavy duty construction and proven
track record in the underground industry, mine duty
pulleys are often used above ground to take advantage
of their added service factor. VAN GORP
®
standard mine
duty pulleys are available in diameters ranging from 12"
to 60" and face widths to 76" .Many types of lagging are
available including SBR, Neoprene and Static Conductive
Neoprene.
There are no ANSI/CEMA standards that govern the load
ratings or material thickness of Mine Duty pulleys. The
following chart compares the additional service factor
that the VAN GORP
®
Mine Duty has compared to the
ANSI/CEMA ratings for a standard pulley.
NOTE: The ANSI/CEMA ratings represents the maximum
load for the shaft for a 8,000 psi bending stress. The
service factor represents the ratio of the pulley load rating
to the shaft load rating.
Mine Duty Drum Pulleys
Table No. 9