Backhoe Ripper tooth design - need your advice

[IslandTractor]

Now you got me confused guys... Island Tractor on post #6 stated 1" thick with 1/2" sides on tips. Coyote machine you have 1/2" thick with 1/2" sides on tip? Is 3/4" a compromise?:bawling:

If I said 1" thick earlier, I was wrong. The reinforced tip is more than an inch but the main body of the ripper is what coyote says. Mine is straight and true and it has a big chunk cut out of the middle due to some rather exaggerated concerns about total weight. If you did 1/2" with additional 1/2" side supports at the tip you'll be fine.

 

[Coyote machine]

The curved arc with the teeth on the inside and backside is: 1/2". It is the thing that looks like a half moon. I measured it myself. 1/2", 1/2", 1/2"
Your move.....

 

[schmism]

so what about just going to the heavy equipment bone yard and buying an existing ripper shank. and welding it to a frame with ears.

might need to cut those down a bit if you pick something from like a D6 and up.

 

[bluehog]

so what about just going to the heavy equipment bone yard and buying an existing ripper shank. and welding it to a frame with ears.

might need to cut those down a bit if you pick something from like a D6 and up.

If I have to ever fab this again with the replaceable tip... I think your suggestion is a valid one. My main concern was the pressure on the tip adapter welded to my design. This approach would take away that concern. I did see these available when I returned the Series 23 adapter & tip(s) I had purchased from HEM in Phoenix. HEM was good about refunding me without a restocking charge.

 

[bluehog]

Just an update... I have ordered my stock and will be working on this next week. I decided on the 3/4" for the shank/blade and since I had to purchase my stock in a 24"x24" sheets, I chose to upgrade all the 3/8" items (front & back plates and mid gussets) to 1/2" rather than buy a whole square of both 1/2" & 3/8". Although I just added extra weight it will save me some ca$h.

I will keep you informed and if I can get some pics of the fab process I will post them here.

... The MIE ripper design was worked out by myself and MIE based on a design I saw of a ripper made by a British company for much larger excavators so the overall shape and proportions resemble that one but scaled down...

Immitaion is the finest form of flattery !!!

:drink: I just want to say thanks everyone for the suggestions... especially IslandTractor & MIE for initially taking the time to fab the awesome original design! :thumbsup:

 

[IslandTractor]

SCRAPPED THE REPLACEABLE TIP IDEA! Here is the latest, refined, solid tipped version

I changed the teeth to be raised from the interior of shank profile rather than sunk into it. This gives it a slightly thicker mid section. I still plan on putting a cutting/knife edge at least on the first 3-4 teeth and the tip as well.

<img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=337482"/><img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=337483"/><img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=337484"/><img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=337485"/><img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=337486"/>

Before you cut, double check your pin diameters. Just measured mine. Main is 1.5" and the second is 1.25. Mine is BH90x so may be different from your BH9000.

 

[bluehog]

Before you cut, double check your pin diameters. Just measured mine. Main is 1.5" and the second is 1.25. Mine is BH90x so may be different from your BH9000.

My pins are identical... but thanks for taking a final look at things before the fab begins. I will keep everyone informed of the progress. I have my design laid out for the waterjet to cut out all components. I will be starting with the bushings/collars for the pin guides (hopefully tomorrow) while I wait for the waterjet to open up.

 

[IslandTractor]

My pins are identical... but thanks for taking a final look at things before the fab begins. I will keep everyone informed of the progress. I have my design laid out for the waterjet to cut out all components. I will be starting with the bushings/collars for the pin guides (hopefully tomorrow) while I wait for the waterjet to open up.

Wish I had a waterjet!

 

[bluehog]

Wish I had a waterjet!

Same here! They are incredible at what they are capable of doing & quickly. It is nice having access to it :cool2:

Here is the file view for the 1/2" stock

Here is the file view for the 3/4" stock

 

[Arc weld]

If you wanted to use ripper shanks like the ones in the picture, it's highly unlikely you'd have any success welding them. They are a heat treated wear resistant alloy. If you could make them so they are pin on would be a better option. You could cut or have cut steel shanks to fit the pin on teeth. Then you don't have to weld an adapter on. Rippers for excavators usually have more curve to the shank.