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Bionicdodge.Com  |  Bionic Tech  |  Street Tires, Suspension & Chassis (Moderators: donram360, adamsredlines)  |  Topic: X-Brace Fabrication. 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: X-Brace Fabrication.  (Read 19694 times)
98Dak408
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« Reply #15 on: January 30, 2009, 06:17:15 AM »

I think both TVR and Kenny Brown are decent designs.  There are many ways to skin a cat, and I'm skinning mine with round.  I just have to make sure it's engineered correctly for round tubing and structurally sound.
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« Reply #16 on: January 30, 2009, 06:23:46 AM »

Is this what you have decided to duplicate ?


* X-Brace 002.jpg (70.21 KB, 640x480 - viewed 223 times.)

* X-Brace 003.jpg (61.25 KB, 640x480 - viewed 230 times.)

* X-Brace 004.jpg (55.77 KB, 640x480 - viewed 221 times.)

* X-Brace 005.jpg (70.85 KB, 640x480 - viewed 231 times.)

* X-Brace 006.jpg (77.03 KB, 640x480 - viewed 228 times.)
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98Dak408
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« Reply #17 on: January 30, 2009, 06:52:24 AM »

Quote
Is this what you have decided to duplicate?
Yes it is.  I may not have all the bends in the tubing because I'm custom fitting it to my truck and its peculiarities.  It's not meant to fit vehicles that may have different exhaust and cat configurations.

If I have to make bends, I might consider a cheap-arse tubing bender such as the 12-ton unit from harbor freight.  It's not a mandral bend but I'm not bending many degrees: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=38024

I picked up their cheap-arse tubing notcher yesterday:  http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=42324

(I normally like better tools but how often am I going to use this stuff?)

Going to pick up the following additional materials from Metal Mart U.S.A. in Warren, MI.  It will be used at the cross-member to tie all four brace arms together:

Angle iron:    1’ of 3 x 2 x 3/16
Flat stock:     1’ of 4 x 3/16
                   1’ of 1.5 x 3/16

I may use 1/2" bolts instead of 7/16".  Not sure yet.



Edit:  Quote from the article Building a roll cage...]/i]:   http://www.therangerstation.com/tech_library/rollcage.htm
"The Harbor Freight pipe bender is infamous for a terrible bend on tubing."

« Last Edit: January 31, 2009, 05:44:18 PM by 98Dak408 » Logged

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« Reply #18 on: January 30, 2009, 07:17:46 AM »

Good to see the "spirit of hot-rodding" is alive and well @ Bionic,here is a pic from the "Shade-tree School of engineering" (measure it with string,mark it with chalk and cut it with a torch)


* stuff084.jpg (179.1 KB, 648x486 - viewed 206 times.)
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98Dak408
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« Reply #19 on: January 30, 2009, 08:06:55 AM »

I think I've seen that one before.  Isn't that the one with 1/4" wall thickness or greater? Smile

It probably works albeit a little crude and on the heavy side.  A plate or gusset in the center "x" would probably be beneficial.
« Last Edit: January 30, 2009, 08:11:34 AM by 98Dak408 » Logged

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« Reply #20 on: January 30, 2009, 11:21:10 AM »

Williams Low Buck Tools tubing bender:  http://www.lowbucktools.com/hydbender.html

This is interesting in regard to what they say about tubing benders from other manufacturers. Granted they are selling their product but it may be worth considering:  http://www.lowbucktools.com/benderFAQ.html

The ones pictured in their beware presentation are the type I was considering purchasing.

« Last Edit: January 30, 2009, 11:22:27 AM by 98Dak408 » Logged

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« Reply #21 on: January 30, 2009, 01:02:05 PM »

This Model 3 tubing bender from Medford Tools and Supply really is the cat's meow:  http://www.medfordtools.com/mb3.html

It bends 180 degrees.  It has a steel die.   You can do round and square.  There are a ton of die sizes and radius.  There is computer software to aid in compound bends and designs…  All the add-ons do add up though.  But the versatility, smaller size, and professional bend quality…

...I’ll put it on my wish list. 


Edit: JD Squared (Model 3 manufacturer) website: http://www.jd2.com/main.html
« Last Edit: January 31, 2009, 08:11:03 AM by 98Dak408 » Logged

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« Reply #22 on: January 30, 2009, 01:27:29 PM »

I do find conflicting information on tensional strength of square vs. round tubing.  Let's consider a round driveshaft.  And for argument, let's say square is stronger in torsion.  Then why would the auto companies make round driveshafts?  Round takes less material than square and is lighter.  But then why wouldn't the auto company make a smaller square drive shaft?  Hmmm?   

Salarguy pointed out that some torsion bars are a hexagon (6-sided) in shape.  That's kind of a cross between round and square.  Hmmm. 

I guess I'm beating a dead horse.  I've already made a decision to use round tubing and have purchased it.  Time to get on with it. 


Taking your  R&D into consideration Richard, the finished product will excede all others already in production! No doubt in my mind! 
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98Dak408
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« Reply #23 on: January 31, 2009, 07:14:28 AM »

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Taking your  R&D into consideration Richard, the finished product will excede all others already in production! No doubt in my mind! 
Thanks Gord!

I was crawling around under the truck and I don't think I can get away without making any bends.

This also looks like some nice equipement for bending tubing through Pro-Tools: http://www.pro-tools.com/index.html
« Last Edit: January 31, 2009, 07:17:31 AM by 98Dak408 » Logged

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« Reply #24 on: January 31, 2009, 07:29:45 AM »

There is a JMR bender through Van Sant Enterprises: http://www.vansantent.com/tube_bending_machines/JMR_Manual_benders.htm
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« Reply #25 on: January 31, 2009, 07:50:55 AM »

The JMR gets a little pricey. 

Edit 1: The JD Squared seems to be the least expensive. The die are a little more than the Pro-Tools but the unit is still cheaper with comparable features.

Edit 2: JD Squared also makes a Model 32 with enhanced features for $100 more than the Model 3.

Edit 3: The pricing is the same for the JD Squared bender from whomever you purchase it (unless used of course).
« Last Edit: January 31, 2009, 08:33:56 AM by 98Dak408 » Logged

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« Reply #26 on: January 31, 2009, 09:53:05 AM »

JD Squared shows how to make a template for bending shapes or to calculate through the use of mathematics:  http://www.jd2.com/M3B%20Directions.pdf


Edit: Pro-Tools instruction sheet explains how to bend tubing:      http://www.therangerstation.com/tech_library/pdf_documents/bendinginstructions.pdf
« Last Edit: January 31, 2009, 05:46:32 PM by 98Dak408 » Logged

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« Reply #27 on: February 02, 2009, 04:26:06 AM »

FYI:  Ebay sells the JD Squared tubing bender at the same price as the manufacturer.  However, ebay gives a reduced shipping rate.  The manufacturer stated that the warranty is not valid if purchased through ebay new.  The manufacturer also said people pay well over the price it can be bought for from the manufactrer by bidding on ebay.  I've seen it for the "Buy It Now" price.

There is an approximate 2 week lead time when ordered so JD Squared can build the unit ordered along with the requested die.  The new Model 32 came out in January and it is beefier and handles bigger tubing in wall thickness and diameter than the original Model 3.
« Last Edit: February 02, 2009, 04:31:39 AM by 98Dak408 » Logged

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« Reply #28 on: February 03, 2009, 12:03:57 AM »

what exactly is the use of the x brace?  to stiffen the chassis i take it?
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« Reply #29 on: February 03, 2009, 07:37:53 AM »

Quote
what exactly is the use of the x brace?  to stiffen the chassis i take it?
Yes it reduces chassis flex for improved handling and off-the-line performance. 
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