New Andersen WD hitch

Bruce H. wrote:
-- In one of the YouTube videos on the hitch, it is stated that 1/4" spring compression puts 2000 pounds of tension on each chain. I would like to know how many pounds of tension 1/8" compression creates.

That would depend on several factors, but we can make a wild guess.

If we assume the urethane bushing has an OD of 1.5" and the hole is 0.5",
the cross section area would be about 1.56".
If the bushing is loaded to 2000#,
the average compressive stress would be about 1300 psi.

Figure 1 of this Guide shows a relationship between stress and compression strain for a typical urethane.

For the urethane composition used in Figure 1,
a stress of 1300 psi corresponds to a compressive strain of about 20%.
Let's assume a strain of 20% corresponds to a compression of 1/4".

Then let's assume a compression of 1/8" corresponds to a strain of 10%.
Figure 1 indicates the corresponding compressive stress would be about 800 psi.
So for the material used for Figure 1, the relation between stress and compressive strain is not linear over the range of 0-20% strain.

If these results are applicable to your bushings,
and assuming 1/4" of compression gives 2000# of tension per spring,
we could estimate the spring tension at 1/8" compression would be about 2000*800/1300 = 1230# per spring.

Ron