KWS Manufacturing

Horizontal Screw Conveyor Calculator

Capacity, Horsepower, And RPM Calculation:

Save time by utilizing our Horizontal Screw Conveyor Calculator to accurately determine screw conveyor size, horsepower, and RPM requirements in a few easy clicks. Send your calculations directly to KWS engineers for review and input as required.

Visit the online engineering guide for assistance with using this calculator.

Step 1: SELECT YOUR BULK MATERIAL Step 2: DESIGN CONDITIONS  
Flowrate(m):     lb/hr
Density: View the materials table to select a density value.     lb/Ft^3
Loading (K):     %
Material Factor (Fm): View the materials table in our engineering guide.
                 
Step 3: CONVEYOR PARAMETERS    
Flight OD(D): View a descriptions of the conveyor flight types.   in.  
Flight ID(d):   in.  
Pitch(P) :   in.  
           
CALCULATIONS :  
  Shaftless Mass Flow Factor, C1    = 
  Spcl. Flight Type Factor, CF2    =   
           
Flowrate (v)    =  m    =   
            Density            
                             
                             
Capacity per revolution  =  0.7854 ( D² – d² ) P K 60 I C1  =   
          1728 CF2        
                             
                             
         

Everything below is hidden on purpose

Calc.:                 R =
 
            Selection:        
Cut Flight Capacity Factor, CF2 =  
Cut & Folded Flight Capacity Factor, CF2 =  
Ribbon Capacity Factor, CF2 =  
Mixing Paddle Capacity Factor, CF2 =  
                     
  Paddle FactorCF2:  
  CF2 calc                
                 
                 
                 
                 
                 
(PER CEMA )  
 

Visit the online engineering guide for assistance with using this calculator.

View a descriptions of the conveyor flight types.Click on symbol for more information.

Conveyor Length(L):   Ft   8. Paddles per Pitch : (0 – 4)
2. Conveyor Diameter (D):   in. 9. Flight Type : Standard
3. Conveyor Speed(N) :   rpm Cut Flight
4. Loading (K) :   %   Cut & Folded
          Ribbon
Drive Efficiency(e) :   %  
7. Hanger Bearing Type : Place an ‘x’ in the appropriate box        
    Ball, Roller or None Hard Iron, Stellite
    Arguto, Babbit, Bronze, Wood Plastech, Nylon, Teflon,
                UHMW
Step 4: DESIGN OUTPUTS
                     
CALCULATIONS :
  Diameter Factor(Fd)   =      
  Bearing Factor(Fb)   =    
  Paddle Factor(Fp)       =        
  Spcl. Flight Factor(Ff)   =  
                   
HPf = L N Fd Fb   =   Fo =  
    1000000                        
                             
HPm = Cw L Ff Fm Fp                      
    1000000                        
      -or- Minimum Required Horsepower:   HPt = (HPf + HPm) Fo = HP
Required Speed, N:  =   RPM
Note: The Maximum recommended RPM Depends on Product Selection – Select Material in Step 1 – or reference the Capacity Table here.
The design above has a screw that is rotating faster than the CEMA recommended RPM. KWS Recommends that you increase the diameter of the screw conveyor or consult with a KWS representative.
= Cv W L Ff Fm Fp         e      
    1000000                        
  exact : 2.03303699192
  -1.44625162034
   
     
     
         
             
avg % diff.            
           
             
             

View a descriptions of the conveyor flight types.Click on symbol for more information.

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