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Thread: Winch Shear Pins
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Old 08-29-2009, 12:17   #122 (permalink)
gringeltaube
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Originally Posted by gringeltaube View Post
..................................
Also thinking of including some steel in the next test series, for the sake of completeness...........! Guess I then need to build a heavy duty "pin cracker" with a hardened shaft...!
G.
Well, finally.... did some more testing, including all kind of materials combining different hole and pin diameters...... and found at least some that could be considered good alternatives to the original genuine GI spec aluminum shear pins!

A VERY BIG THANK YOU to Kenny (Recovry4x4) for sending me these to have for comparison!!!!!!

(For anyone interested there still are some more left for further experiments.)

In general the torque figures were relatively consistent and predictable comparing similar material and sizes. Pin diameter matters much more then hole diameter or shape. Obviously it makes a big difference if a bolt sticks with its full diameter inside the shaft or is threaded partially or full length.

The chart (and pics) below show what was done. Hope it is easy enough to understand.

Enjoy!

G.
Attached Images
File Type: jpg Shear Pin Test, Material vs. Shear Strength 02.jpg (106.0 KB, 223 views)
File Type: jpg Shear pin test 011 (Small).jpg (68.9 KB, 178 views)
File Type: jpg Shear pin testing 008 (Small).jpg (75.5 KB, 151 views)
Last edited by gringeltaube; 09-13-2009 at 08:37. Reason: text missing
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