If the sleeve will slide off enough to use epoxy then it should work(key here would be coverage). Structural adhesives have been used in the Automotive field for over 15 years.Anyone know when bonding was first used in Aircraft construction? Bonding to anodizing should be OK though , Alans and Raleigh Techniums were bonded in a similar way and I do not know what the failure rate was. I would use 4 rivets of small diameter placed 2 on each side at the bottom of the bar where they will be out of sight. These could probably be placed in the stem area or further out but I would not use them at the outer edge. A single pin concentrated all force in that one area, my bet would be using 4 pins in smaller diameter would have worked better. There are some good brazing products available (low temp) but heat would ruin the finish which was one of the reasons I have made the recommendations I have. All this over an admitted cheap pair of bars.......................................
BOB FREITAS MILL VALLEY CA USA who believes you could do a KOF lugged frame by bonding and whos Dads Bike shop was originally a Blacksmith shop.
aldoross4 wrote:
> I've tried drilling & pinning (one pin 1/8" dia) through the
> sleeve and bar, but the aluminum (non-heat-treated Cinelli
> bars) is so soft that the slippage continued, while the pin
> just gouged a slot through the bar and the sleeve.
>
> If you try glue or epoxy, remember that under load it could
> shear (break loose) at any time.
>
> Aldo Ross
> Middletown, Ohio
>
> ----- Original Message Follows -----
> From: Bob Freitas <freitas1@pacbell.net>
> To: mark@sisuhome.com
> Cc: CLASSIC RENDEZVOUS <classicrendezvous@bikelist.org>
> Subject: [CR]Re: Bar repair
> Date: Fri, 09 Nov 2007 08:25:28 -0800
>
>
>> Trick to using adhesive would be to get it
>> between the 2 pieces.Can the sleeve slide any? If it can
>> be moved then you could apply a 2 part epoxy (use one
>> with a wide window of 30 minutes at least).
>> Instead of a screw I would use rivets , my
>> choice would be 1/8 or smaller.Aluminum might not hold up
>> so try stainless or just steel.
>>
>>
>> BOB FREITAS
>> operating in his element in MILL VALLEY ,CA
>> USA _______________________________________________