Question about steel strength??

[Xfaxman]

xfaxman and dragoneggs-

Thanks for the information.
Do you think the design for mounting the FEL brackets will work?

You are welcome, glad to help.

I am not familiar with your tractors FEL mounting system. I am not sure what you are trying to do with the brackets. Need pictures of the B7800 quick attach system.

The stuff that I showed earlier in the thread was SSQA.

 

[jodebg]

My B7800 has a pin on bucket. I am making a set of forks that will attach to both the
3ph and the FEL.

What I now need to do is mount the FEL brackets onto
the frame. I want to bolt the brackets on so I can remove them when
not in use.

The photos of the wooden model shows the frame mounts and the
FEL brackets that need to fit together.

My question is, will these brackets (see model) work?
Are they strong enough, or is there a better way to mount them?

Thanks again-

 

[Xfaxman]

My B7800 has a pin on bucket. I am making a set of forks that will attach to both the
3ph and the FEL.

What I now need to do is mount the FEL brackets onto
the frame. I want to bolt the brackets on so I can remove them when
not in use.

The photos of the wooden model shows the frame mounts and the
FEL brackets that need to fit together.

My question is, will these brackets (see model) work?
Are they strong enough, or is there a better way to mount them?

Thanks again-

I know you are making forks, I edited my post. Seeing the pin on brackets confused me.

The brackets should work.

A gusset where I added the arrow would help make it stronger.

 

[jodebg]

xfaxman-

Lets add 2...thanks.

 

[Xfaxman]

Have you checked the rollback angle? I noticed the pins are straight up and down.

When I made my pin on brush fork, I angled the angle iron mounts and offset the holes to get enough rollback on the ends. Also note the chain slots, very handy.

 

[jodebg]

XFAXMAN-

I'm going to using a Kubota quick coupler that I recently purchased.
Here's a video of the qc..

https://www.youtube.com/watch?v=KuktqggNDCw

Not sure if Iwould be able to offset the holes using this qc?
Maybe tilt the brackets?

What is the theory behind rollback?

Thanks for reminding me about the chain slots...
I forgot them, as you can see-woops.

 

[Creamer]

2D edge distance is a good rule of thumb. That is 2 times the hole diameter measured from the hole center to the edge of the material.

All calculated and well tested Xfaxman. 2D is overkill. 1D is more than adequate. Stress propagates at a 45 degree angle in an isotropic material (most low carbon steel is fairly isotropic). It wasn't designed to and hasn't broke and it has been well loaded, i.e. bringing the front end of the tractor up with at least 250 lbs in bucket. I also did not want a bunch of long edges sticking out to be scratchers.

 

[Xfaxman]

XFAXMAN-

I'm going to using a Kubota quick coupler that I recently purchased.
Here's a video of the qc..

https://www.youtube.com/watch?v=KuktqggNDCw

Not sure if I would be able to offset the holes using this qc? Yes you can, like this:

Maybe tilt the brackets?

What is the theory behind rollback?

Thanks for reminding me about the chain slots...
I forgot them, as you can see-woops.

In the video, starting at 40 seconds you can see the offset holes on the grapple. Then look at the bucket, it doesn't have near as much rollback.

Without rollback, driving downhill stuff will fall off of the forks. :thumbdown:

With that quick coupler, I recommend building the frame wide like my brush fork frame and add one permanent crossmember for the 3 point lift arms. It would be stronger and lighter than your removable brackets. You can use flat plate for the pin holes, like is shown in the video, not angle iron like I used.

Here it is back in 2009 with a cottonwood log that weighed 805 pounds.

 

[Xfaxman]

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With that quick coupler, I recommend building the frame wide like my brush fork frame and add one permanent crossmember for the 3 point lift arms. It would be stronger and lighter than your removable brackets. You can use flat plate for the pin holes, like is shown in the video, not angle iron like I used.

Let me clarify that previous post. I mean use Creamer's fork design with square bottom rail and wrap around c-clamp, but the width would match your loader arms. The FEL mounting brackets would look just like you bucket mounts, but offset if you need more rollback.

You can find someplace in or on the frame for chain slots. :thumbsup:

 

[Creamer]

Xfaxman - I get a kick out of seeing the old Toro lawnmower turned into a loader. I will bet it is handy though. It seems like you are a little close to the action though - maybe a little in the dirt? I like the brush fork concept. Very simple and I will bet useful.