Frame material

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ducdon
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Frame material

Post by ducdon » Mon Jun 01, 2015 8:23 pm

Can anyone tell me what material is used on the Bevel Twin frames. The right hand tube on my project Darmah has a dent from an accident. I need to replace about 4 inches. OD is 30mm. Wall thickness? Chrome Moly? DOM mild steel. Better yet does anyone have an unrepairable frame that they could sell me a section from?

Cheers
Don

ducdon
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Re: Frame material

Post by ducdon » Tue Jun 02, 2015 12:10 pm

I just found a reference in Ian Falloon's Ducati 750 Bible that says the 750 frame material is AQ45. Nice but I have no idea what that means. :-D

Don

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BevHevSteve
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Re: Frame material

Post by BevHevSteve » Tue Jun 02, 2015 4:17 pm

Translation : water pipe
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ducdon
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Re: Frame material

Post by ducdon » Tue Jun 02, 2015 6:01 pm

THANKS

Any idea what the wall thickness. I suspect 2mm?

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BevHevSteve
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Re: Frame material

Post by BevHevSteve » Tue Jun 02, 2015 6:09 pm

I don't know but it's crap steel and I would highly advise you to not cut out then add in new material. I'd find a new frame. A Darmah frame should not be the end of the world to find and purchase..... Or you can get a superior aftermarket frame.
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Steve Allen (925)798-BEVL[2385] Ride'm, Don't Hide'm
Ducati/Euro Spares -> https://Store.BevelHeaven.com
Facebook > http://facebook.com/Bevel.Heaven
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ducdon
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Re: Frame material

Post by ducdon » Wed Jun 03, 2015 1:17 pm

Thanks Steve. I had considered a replacement frame. Any square case one would work as the bike will not be a restoration. I have a pretty well equipped machine shop in my garage. Making a lot of my own stuff is my thing and in many cases an economic necessity. One of the arguments in favor of repairing the existing frame is that it has a recorded VIN and is registered and legal in my jurisdiction. Registering a vehicle without registration history and a recorded VIN can be a challenge not to speak of expensive here. I also have access to a master automotive fabricator. It's all just planning at this stage. I do respect your expertise. In the end that's what I may have to do.

Cheers
Don

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sam
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Re: Frame material

Post by sam » Mon Jun 08, 2015 7:21 am

If you do a repair to the frame I would recommend a chamfered joint / diagonal butt weld this involves cutting the tube at 30 deg or so, this way most of the weld is in shear and not in tension if possible insert a snug fitting sleve into the tube drilling a hole through bith sides of the main tube so you can also puddle weld the sleve in position and another 90 deg to the first on the new section . A good book on this and many other chassis repairs is "Prepare to Win" by Carroll Smith a handy bible to have at hand.

Sam

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