56 PNEG-2343 U-Trough Free Flow Unloading System
9. U-Trough and Sweep Selection Guidelines
IMPORTANT: Capacity requirements must be determined prior to ordering any unload/sweep system.
Failure to do so may cause the sweep to overfeed the center gate. This could cause the
electric motor to cut out and may damage the sweep backplate.
Listed on the next two pages are guidelines to assist with proper flight diameter and motor pulley selection.
These are only theoretical values and will change with grain types, conditions and moisture content.
All capacities are shown in bushels per hour (BPH).
Pulley Selection
1750 RPM/60 Hz Motors
Below are charts outlining unload and sweep speeds and capacities when using a 1750 RPM motor.
NOTE: 1750 motor RPM is typically used in North America.
12" Pulley
18" Pulley
1460 RPM/50 Hz Motors
Below are charts outlining unload and sweep speeds and capacities when using a 1460 RPM motor.
NOTE: 1460 motor RPM is typically used in Europe.
12" Pulley
18" Pulley
U-Trough Unloader with Sweep
3.6" Motor Pulley and 12.4" Flight Pulley
RPM Capacity
(Bushels
per Hour)
Motor 1750
Unload 508 6000
Sweep
6"
338
1500
7-1/4" 2500
8-1/4" 3500
9" 4500
U-Trough Unloader with Sweep
5" Motor Pulley and 18.4" Flight Pulley
RPM Capacity
(Bushels
per Hour)
Motor 1750
Unload 475 5800
Sweep
6"
316
1400
7-1/4" 2400
8-1/4" 3400
9" 4400
U-Trough Unloader with Sweep
4-1/4" Motor Pulley and 12.4" Flight Pulley
RPM Capacity
(Bushels
per Hour)
Motor 1460
Unload 503 6000
Sweep
6"
335
1500
7-1/4" 2500
8-1/4" 3500
9" 4500
U-Trough Unloader with Sweep
4-1/2" Motor Pulley and 18.4" Flight Pulley
RPM Capacity
(Bushels
per Hour)
Motor 1460
Unload 356 4300
Sweep
6"
237
1100
7-1/4" 1700
8-1/4" 2500
9" 3400
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