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PostPosted: Mon Aug 12, 2013 7:17 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4443
Location: Herts UK
The hillowtech xt and other similarly named cranks are so called cos they are holllow
A u shaped forging has the open side welded to form hollow box
Look on weightweenie web site as somebody milled thd reverse out on one of the


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PostPosted: Mon Aug 12, 2013 8:07 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Sun Sep 04, 2011 11:33 am
Posts: 3099
Location: Riding my Woodsie.
Milling clamps and such as on WD's Marin is one thing, but I have seen first hand what can happen to a mans calf when a crank snaps. :shock: :shock: :shock:

I would certainly never ride modified cranks. :lol:


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PostPosted: Mon Aug 12, 2013 8:09 pm 
Old School Grand Master
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Joined: Tue Oct 04, 2011 4:15 pm
Posts: 3499
Location: Behind you with the duct tape pulled out.
xerxes wrote:
Used to see a fair amount of "drillium" on time trial bikes back in the 80s, brakes, seat posts, stems, derailleurs and cranks that were more hole than metal. When well done it looks great, but I'm not sure how safe it is. :shock:

Image

Lots more: http://www.google.co.uk/search?newwindo ... 0QWzr4DYDA


That is beautifully done. Wouldnt ride it but would certainly love a set just to hang on the garage wall.


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PostPosted: Mon Aug 12, 2013 9:19 pm 
Old School Hero
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Joined: Fri May 01, 2009 6:41 pm
Posts: 183
Location: The Netherlands
My advice is not tot modify cranks by e.g. milling. The reason for this is that these parts are subjected tot low cycle fatigue. Unless you have designed the cranks yourselves you will be unaware of any stress concentrations and possible crack initiation.
Polishing though is an option to s(h)ave some grams.


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PostPosted: Mon Aug 12, 2013 10:26 pm 
Retro Guru
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Joined: Mon May 07, 2012 10:30 pm
Posts: 293
Location: Lochaber
Looks a bit iffy to me, especially on something as subject to stress as cranks. Can't help thinking you'd save as much weight by taking a piss. But I guess that's not the point...


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PostPosted: Tue Aug 13, 2013 4:50 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Thu Apr 28, 2011 5:31 pm
Posts: 6474
Location: WILTSHIRE
WD Pro wrote:
littleblackflash wrote:
I just brought another cannondale and the XT brake levers have a slot milled in the handle bar clamp which was another weight weenie trick.


Image

WD :D


How are these done & where can I get it done? :D


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PostPosted: Tue Aug 13, 2013 6:33 pm 
Retro Guru
Retro Guru
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Joined: Fri Sep 19, 2008 4:37 pm
Posts: 5198
Location: North West
They were done at work on the milling machine with a dividing head. I mounted them like this :

Image

Image

Image

The milling machine, dividing head and the building they were in are all gone / flattened ... :cry:

WD :D


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PostPosted: Tue Aug 13, 2013 8:59 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun Apr 02, 2006 1:03 pm
Posts: 11796
Location: Returning
Love this milled stuff , feel a project coming on


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