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Strain Gage Shear Patterns

The gage pattern refers cumulatively to the shape of the grid, the number and orientation of the grids in a multiple-grid gage, the solder tab configuration, and various construction features which are standard for a particular pattern. Torque measurement is a very common application, used to measure engine power output on propshafts and driveshafts, driver input through steering wheels, tightening bolts, or anywhere a component is subjected to a twisting force.

 

When the shaft is loaded in torsion, it creates a state of pure shear and the applied torque can be found by orienting rosettes where the gridlines are positioned at 45 degrees to the axis of the shaft.  Some common applications can be found in pulp and paper mills for measuring efficiency, output shafts for large ships for optimum engine setup, and even power monitoring for cyclists so they can determine how much energy was expended during training, and, of course, there are many others.   For most of the these applications, the strain gages are used to construct a full Wheatstone bridge circuit to double the sensitivity to torque and cancel unwanted effects due to axial or bending load components.

 

CEA Series Shear Strain Gages

 

 

 

 

 

 

 

 

 

 

 

 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            

 

Configuration

 

Pattern   Res. [Ω]  

Gage 

Length 

 

Gage 

Width

 

Matrix

Length 

 

Matrix

Width

  Standard STC  

Temperature Range

  Options
                                   
Tee Rosette Strain Gage 062UVA   350  

0.062

[1.57]

 

0.063

[1.60]

 

0.42

[10.7]

 

0.23

[5.8]

 

 

00, 03, 05,

06, 09, 13

 

 

–100° to +350°F 

(–75° to +175°C)

 

 

 P2, SP11

                               
  187UVA   350  

0.187 

[4.75]

 

0.150

[3.81]

 

0.63

[16.0]

 

0.39

[9.9]

     
                             
  125USA   120, 350, 1000  

0.125

[3.18]

 

0.350

[1.52]

 

0.48

[12.19]

 

0.40

[10.16]

     
                             
  250USA   120, 350, 1000  

0.250

[6.35]

 

0.120

[3.05]

 

0.96

[24.4]

 

0.80

[20.3]

     
 

 


 


 


 


 


 


 


 


 


 


 

           
                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive    –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
  –320° to +200°F (–195° to +95°C)
                                 
  M-Bond 600 Kit    Two-component, solvent-thinned, epoxy-phenolic strain gage adhesive for high-performance    –452° to +500°F (–268° to +260°C)
                                   
                                   
                                   
                                   

EA Series Shear Strain Gages

 

 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            
Configuration Pattern   Res. [Ω]  

Gage

Length 

 

Gage 

Width

 

Matrix

Length

 

Matrix

Width

  Standard STC    Temperature Range   Options
                                   
Shear Strain Gage Patterns 062TH   120  

0.062

[1.57]

 

0.055

[1.40]

 

0.27

[6.9]

 

0.21

[5.3]

 

 

00, 03, 05,

06, 09, 13

 

   

 –100° to +350°F   (–75° to +175°C)

 

 

E, EL, P, W, SP11

                             
  062TVA   350  

0.062

[1.57]

 

0.055

[1.40]

 

0.27

[6.9]

 

0.21

[5.3]

     
                             
  062TW   120 , 350  

0.062

[1.57]

 

0.055

[1.40]

 

0.27

[6.9]

 

0.21

[5.3]

     
                                   
  125TK   350  

0.125

[3.18]

 

0.110

[2.79]

 

0.40

[10.2]

 

0.31

[7.9]

           
                                   
  125TR   350  

0.125

[3.18]

 

0.125

[3.18]

 

0.36

[9.1]

 

0.47

[11.9]

           
                                   
  250TK   350  

0.25

[6.35]

 

0.22

[5.59]

 

0.74

[18.8]

 

0.55

[14.0]

           
 

 


 


 


 


 


 


 


 


 


 


 

           
                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive    –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
   –320° to +200°F (–195° to +95°C)
                                 

M-Bond 600 Kit 

 

Two-component, solvent-thinned, epoxy-phenolic strain gage adhesive for high-performance

   –452° to +500°F (–268° to +260°C)
                                 
                                   
                                   
                                   

WK Series Shear Strain Gages


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            
Configuration Pattern   Res. [Ω]  

Gage 

Length

 

Gage 

Width

 

Matrix

Length

 

Matrix

Width

  Standard STC    Temperature Range   Options
                                   
Tee Rosette Strain Gage 125TK   1000  

0.125

[3.18]

 

0.110

[2.79]

 

0.40

[10.2]

 

0.31

[7.9]

 

 

00,03,05,

06,09,13

 

  

 –452° to +550°F  (–269° to +290°C)

 

 

W, SP11

                             
  125TR   350, 1000  

0.125

[3.18]

 

0.125

[3.18]

 

0.36

[9.1]

 

0.47

[11.9]

     
                             
  250TK   350, 1000  

0.250

[6.35]

 

0.220

[5.59]

 

0.74

[18.8]

 

0.55

[14.0]

     
                             
  250TR   1000  

0.250

[6.35]

 

0.250

[6.35]

 

0.70

[17.8]

 

0.96

[24.4]

     
 

 


 


 


 


 


 


 


 


 


 


 

 

 

 

 

 

 

                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive   –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
   –320° to +200°F (–195° to +95°C)
                                 
M-Bond 600 Kit    Two-component, solvent-thinned, epoxy-phenolic strain gage adhesive for high-performance    –452° to +500°F (–268° to +260°C)
                                   
                                   
                                   

C2A Series Shear Strain Gages


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

          [in/mm]   [in/mm]   [in/mm]   [in/mm]            
Configuration Pattern   Res. [Ω]  

Gage

Length 

 

Gage 

Width

 

Matrix

Length

 

Matrix

Width

  Standard STC    Temperature Range   Options
                                   
Gages With Pre-attached Cables 062LV   120 , 350  

0.062

[1.57]

 

0.050

[1.27]

 

0.26

[6.6]

 

0.27

[6.9]

 

 

06, 09, 13

 

 

 –60° to +180°F   (–50° to +80°C)

 

 

W, SP11

 

 


 


 


 


 


 


 


 


 


 


 

     
 

 


 

 

 

 

 

 

 

 

 

 

           
                              Temperature Range
Typically used with: M-Bond 200 Kit   Room temperature instant curing strain gage adhesive   –25° to +150°F (–30° to + 65°C)
                                 
M-Bond AE-10 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
  –320° to +200°F (–195° to +95°C)
                                 
M-Bond AE-15 Kit   Two-component, 100%-solids epoxy system for general purpose strain gages
Room temperature cure, highly resistant to moisture and most chemicals
   –320° to +200°F (–195° to +95°C)
                                   
                                   
                                   

 

 


 

shear torque strain gage image

Advanced Sensors Technology Shear and Torque Strain Gages

Torque loads cause shear strain in the structure to which the torsional loads are being applied. This is a good thing, because strain gages can measure these shear strains. That's actually not a precisely true statement. Bonded electrical resistance strain gages do not respond to pure shear strains. Fortunately, associated with all shear strains are two normal components of strain, tension and compresion, which strain gages easily sense. This is why it takes two strain gage sensing grids to resolve one shear strain value. For mathematical convenience, these grids are normallyoriented at ±45° to the measurement direction (90° between the two grids), allowing the gage, when properly connected to a strain indicator instrument, to directly display strain magnitude. But, the grids could be oriented at any relative to one another and the shear strain casn be calculated.

 

Torque transducers provide a convenient way of measuring torque-loads being applied to a structure, shaft, bolt, door knob, and so on. The sensor used in many high quality torque transducers is a Micro-Measurements Transducer Class shear-strain gage. These precision measuring devices allow designers to optimize structures for anticipated loads.

 

 

 

Explore our extensive collection of tutorials and informational videos on a variety of strain measurement topics.

Explore our free education seminars aimed at helping Design and Test Engineers understand strain gage theory selection, preparation, performance, installation, configuration, and more.

Questions and answers on the go! Listen to Micro-Measurements experts explain the many facets of strain gage technology.

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