Change #27

[Track-T]

Under estimated the amount of torque made from the steering box while turning. I had a piece of 7/8"
tube treaded to 5/8" that screwed to the output shaft of the corvair box, It had a 3/16" roll pin plus a jam nut
After sitting the front wheels on the floor I went to see how things turned......WRONG..... The roll pin sheared just like it nothing.
OK, I thought,I'll go 1/4" roll pin, Started to drill it out and my drill bit broke off half way in. Been trying for 2 hours now to get the bit out.
Once it's apart I'll post pics.....

 

[Track-T]

couldn't get the bit out in the car. so I cut the shaft in two and removed the box and shaft.
more to fun follow

 

[2old2fast]

Talk to a machinist , there are pins that are shear-proof...
dave

 

[Track-T]

Thinking about 1/4" grade 8 bolts. Wonder what the sheer is on them?

 

[2old2fast]

Bolts aren't rated in shear , only tensile strength. AFAIK..
dave

 

[fluidfloyd]

Track T,

Here is the information you need. I would sure like to see a picture of what you have.

George

http://opensourceecology.org/wiki/bolt_shearing

http://www.portlandbolt.com/faqs/calculating-shear-strength-of-grade-8-bolts/

 

[choppedtop]

1/4 grade 8 bolts should have shear strength of 60% of the tensile strength, approx. 2750#
Lee