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[mrjeep81]

Here's a few shots of things I've been working on for my next tractor. And before this goes somewhere I don't want it to, I am not doing this because it "needs" to be done. I'm not even doing it because someone else "needs" it done. I'm just doing it because I can, and, I want to.

[52'F-3]

I like it so far.....


also did you change the offset of the rear wheels?

[DoubleO7]

AMEN
pretty sad day when a pre-emptive statement has to be included in your posts.



anywho, are those golf cart hubs?

[twoton]

Looks cool, eager to see more!

[DieselDoctor]

Interesting! Keep us posted!

[john hall]

OK, let me get this straight, you're building a custom front axle/steering and are then going to build a Cadet around it? Well that's a different approach! What about the tires, you staying with that tread pattern or switching to something more like a lawn mower, or something resembling tractor style tread patterns? What you have done thus far looks pretty good.

[mrjeep81]

Originally Posted by DoubleO7

AMEN
pretty sad day when a pre-emptive statement has to be included in your posts.



anywho, are those golf cart hubs?

Trailer hubs, golf cart tires and wheels I created the axle"extensions" by centering 1" bolts and then machined them off for the correct squeeze on the taper bearings in the hubs, removed the factory stop for the sealed bearings and machined the bearing stop/seal surface then welded them on. Yes, I drilled the spot welds and moved the centers back to mimic "super" rear wheels. This is going to be a Quiet Line SGT.

[twoton]

mrjeep81, for your reference;

According to Fastenal’s Technical Reference Guide s7028 ;

https://www.fastenal.com/content/doc...renceGuide.pdf


From page 2;

Figure 2 Shear Planes in a Bolted Joint

“When no shear strength is given for common carbon steels with hardness up to 40 HRC, 60 % of their ultimate tensile strength is often used once given a suitable safety factor. This should only be used as an estimation.”

And from page A-1,

Ungraded, low carbon steel bolts in the size range from ¼” – 1 ½” have a minimum tensile strength of 60,000 lbs per square inch. Jumping up to a grade 8 , Medium carbon alloy steel: quenched & tempered, same size range bumps those numbers up to minimum 150,000 psi.


So, 60% of the lowest strength listed (60,000psi), gives us 36,000psi, with the cross sectional area of a half inch bolt at 0.19625 inches. That's 7,065lb shear strength. That’s minimum, lowest grade bolt, per spindle extension, only providing partial support to the outside bearing. Even if you reduce that by 50% as a safety factor, it looks like you’re good!

[J-Mech]

twoton: So.... if I cast a giant weight that weighs 3500#. Then brought in a crane and picked it up 7' off the ground and used a 1/2" bolt (on a side load) to hold it up... would you stand under it? Keep in mind it is only 1/2 of the rated side load (shear strength) of the bolt. It should be completely safe right?

[Sam Mac]

If the extension that he machined is firmly in contact with the existing axle I would agree with the shear being the determining factor, but if there is a space between the extension and the factory axle now we are talking about bending moment. Also keep in mind the offset of the wheels. I'm not trying to be negative about this, just trying to help.