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Belt Length Calculator

(i.e., Belt Cut Length Calculator)
Method One:
Use when belt's ID, OD, IC, or OC are known. Do NOT use on used belts because they are permanently stretched. Use only to duplicate unused belts.
 
Belt cross Section:
 
Please enter ONE of the following:
Inside Diameter (ID):
Outside Diameter (OD):
Inside Circumference (IC):
Outside Circumference (OC):
      Help
 
Belt Cut Length:
 
belt length calculator
Enter one:
    
 


Method Two:
Wind a string around the belt path.
 
String length:
String cross-section diameter:
Belt cross-section diameter:
Stretch factor: (e.g. Enter 10 for 10%)
     Help
 
Belt Cut Length:
Typical Stretch Factors
  Cyclothane-A 83A 10% (8% - 14%)
  Cyclothane-B 85A High Tension 20% (18% - 22%)
  Cyclothane-A 90A Super Red 15% (9% - 15%)
  Cyclothane-A 92A 7.5% (7% - 12%)
  Cyclothane-E 85A 12.5% (10% - 14%)
  Hytrel 92A 7% (5% - 8%)
  Cyclothane 90ASD Anti-Static 9% (8%-10%)
  Twisted 83A belts (coiled like a spring) 16% (15%-25%)
  Rough Green 88A Reinforced 1% (1% - 2%)
Enter one:
     
 

Printable View
Method Three:
Two Pulley System.
  For O-rings, Flat belts, V-belts
Belt cross-section diameter (thickness):
Diameter of Pulley 1:
Groove depth of Pulley 1:
Diameter of Pulley 2:
Groove depth of Pulley 2:
Center distance between pulleys:
Stretch factor:
(Enter 10 for 10%.  Most lineshaft conveyors use 12%)
Angle between pulleys in degrees:
(e.g. 0 for roller-to-roller,  90 for line-shaft)

     Help
Belt Cut Length:
pulley belt length calculator pulley belt length calculator
Enter one:
     
 
*If the belt rests on the pulley’s root diameter (bottom of the pulley), enter the outside diameter of the pulley and the groove depth.  Alternately, enter the Root Diameter of the pulley and zero for groove depth. Either way you will get the same answer. If the belt wedges in a V-pulley and does not rest on the root diameter, enter the diameter that is defined by the belt’s outside edge. For the groove depth, enter the belt’s thickness. In all cases the program will automatically calculate the belt’s cut length.


Method Four:
For tracking sleeves, groove sleeves, roller sleeves, spacers, tires, and urethane spool flanges.
Stretch is critical and varies widely, so before ordering large quantities request a sample to make sure it fits.
 
Diameter of Roller:
Groove depth: (Depth below roller surface -- Zero for spacers, flanges, tracking and roller sleeves.)
Belt cross-section: (For Round enter Diameter.  For Vee enter Height.  For Flat enter Thickness.)
Stretch factor: (Tracking sleeves = 7.5%  Roller sleeves = 1%.  Enter 7.5 for 7.5%)
     Help
Cut Length:
Enter one:
     
 
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