Rockwell Automation Publication 7000-UM202D-EN-P - May 2018 211
Encoder Use and Torque Capabilities Appendix H
Table 23 - Typical Application Load Torque Profiles
Application Load
Torque
Profile
Load Torque as Percent of Full-Load Drive
Torque
Required
Drive Service
Duty Rating
Encoder
Required for
Extra
Starting
Torque?
Break-
away
(1)
Accelerating
(2)
Peak
Running
AGITATORS
Liquid CT 100 100 100 Heavy Yes
Slurry CT 150 100 100 Heavy Yes
BLOWERS (centrifugal)
Damper closed VT 30 50 40 Normal No
Damper opened VT 40 110 100 Normal No
CHIPPER
(WOOD)—
starting empty
CT 50 40 200 Contact
factory
No
COMPRESSORS
Axial-vane,
loaded
VT 40 100 100 Normal No
Reciprocating,
starting unloaded
CT 100 100 100 Contact
factory
Yes
CONVEYORS
Armored Face CT 175 150 200 Contact
factory
Yes
Belt type, loaded CT 150 130 100 Heavy Yes
Drag type CT 175 150 100 Contact
factory
Yes
Screw type,
loaded
CT 200 100 100 Contact
factory
Yes
DRAG LINE CT 100 200 200 Contact
factory
Yes
EXTRUDERS
(rubber or
plastic)
CT 150 150 100 Contact
factory
Yes
FANS (centrifugal, ambient)
Damper closed VT 25 60 50 Normal No
Damper open VT 25 110 100 Normal No
FANS (centrifugal, hot gases)
Damper closed VT 25 60 100 Normal No
Damper open VT 25 200 175 Contact
factory
No
FANS (propeller,
axial flow)
VT 40 110 100 Normal No
GRINDING MILL
(Ball/Sag Mill)
CT 175 180 100 Contact
factory
Yes
HOISTS CT 100 200 200 Contact
factory
Yes
KILNS (rotary,
loaded)
CT 250 125 125 Contact
factory
Yes
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