Strainsert has updated their application note on sheave load pins.

Download a PDF version of the Bi-Axial Load Pin Application Note

Load Pins are designed into sheave applications for measuring line tension. Sheaves are designed with either a variable or constant wrap angle.

For the variable wrap angle case, two strain gage bridges are installed perpendicularly (Px and Py). For a sheave with a variable wrap angle, the line enters and exits the sheave at 1 fixed angle point and 1 variable angle point.

For the constant wrap angle case, one strain gage bridge is installed along the primary (sensing) axis of force (P). For a sheave with constant wrap angle, the line enters and exits the sheave at 2 fixed angle points.

Please contact Strainsert for help with your sheave application or to gather more information about our load pin products.