Tension Roll Transducer Specification Worksheet

Please help us help you to select the correct tension roll transducer for your application by providing some basic information. Complete as much of the application data requested as possible, then print this page and fax it to us.


A. ROLL AND SHAFT CONFIGURATION
tension roller spec sheet
tension roller spec table
enter tension roller spec info
enter options and accessories
B. WEB CHARACTERISTICS
  • Total estimated operating tension: Max.___Pounds, Min.___Pounds
  • Type of Web Material:_______________________________________
  • Web Width: Max._____Inches, Min._____Inches
  • Basis Weight or Thickness:______Pounds
  • Web Speed: Max.______Feet per Minute, Min______Feet per Minute
C. SPECIAL FEATURES:

____________________________________________________________________________________________________________

D. LOAD RATING CALCULATION

The load rating of your desired tension transducers needs to be determined prior to size selection. Load rating is calculated using physical properties like the weight of the idler roll, the wrap angle on the roll, your expected web tension, and the direction of force due to web tension. The drawings below illustrate an axial (side) view of a tension-sensing roll in a machine frame for the three general web wrap orientations (Up, Down, Sideways). Record the information requested in the terms B through E below. Then use the formula below the drawing closest to your orientation to calculate your load rating, or call DFE and we calculate it for you.

Cross out the wrap examples that do not apply.

tension roller specification diagrams

Note: The resultant force FT points in the same direction as the arrow on the transducer.

value of W for aluminum rolls

Standard Load Ratings are:

  • Size 0 = 12, 25, 50, 100 lbs.
  • Size 1 = 12, 25, 50, 100, 150 lbs.
  • Size 2 = 12, 25, 50, 100, 200, 400 lbs.
E. ANGLES AND IDLER WEIGHT

Record your information below.

  • B Wrap Angle:____ Degrees
    (Note: The wrap angle (B) may be calculated by subracting your mesured angle (C) from 180°. B=190 - C)
  • W = Weight of Ider Roll:______Pounds
  • FT = force on idler roll due to web tension. FT is in the same direction as the arrow on the transducer:______Degrees
  • A = Angle between FT and vertical axis:______Degrees
    C = face width of roll (inches). Refer to Note 3 for other roll materials.
TABLE 1
ANGLESINECOSINE
0"0.0001.000
5"0.0870.996
10"0.1740.985
15"0.2590.966
20"0.3420.940
25"0.4230.906
30"0.5000.866
35"0.5740.819
40"0.6430.766
45"0.7070.707
50"0.7660.643
55"0.8190.574
60"0.8660.500
65"0.9060.423
70"0.9400.342
75"0.9660.259
80"0.9850.174
85"0.9960.087
90"1.0000.000
NOTES:
  1. Any covering applied to the roll will affect the load rating calculation
  2. Consult factory for sizing of units with steel or stainless steel rolls.
  3. Refer to TR Transducer data sheet for length limitations, W formulas, options, and accessories.

Company Information

Name:_______________________________________________Company:______________________________________________

Address: _________________________________________________________________________________________________

City: _______________________________________State:_____________________________________ Zip:_______________

Country:_______________________________________________________________Email:_____________________________

Phone:_____________________________________________Fax:___________________________________________________