Milled Moment Cranks
09 Sep 2009

Milled Moment Cranks

KH Moment cranks are bombproof for sure, but that probably also means they

09 Sep 2009

KH Moment cranks are bombproof for sure, but that probably also means they are overbuilt (and overweight) for many riders and/or riding situations. Especially with longer Moments you begin to feel the weight of each crank as they spin around.

With the crank problems I had with my earlier geared hub I wondered if a good chunk of the crank meat could be milled away, to increase clearance and loose weight without compromising strength too much.

According to Florian, regarding crank/frame clearance issues when running a Schlump hub:

The milling of the cranks is a very good solution.

A few guys have milled their Moment cranks to loose weight. Florian kindly offered to mill a pair of cranks to address the crank/frame clearance if I sent them over with the hub but as it happened a local aussie guy with the skills and machinery was interested in having a crack at milling some Moments to address crank/frame clearance AND loose weight. After a contra or two, two pair of test cranks were milled – thanks Ian!

The milled 150/125 cranks are now in use on my KH24″ GUni. Depending on how they go there are a few ideas in the works re milling the next set of cranks.

Milled Moment Cranks

Milled Moment Cranks

Milled Moment Cranks

Milled Moment Cranks

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  1. corbin September 9th, 2009 9:43AM

    what kind of cutter did he use to mill out the weight?

  2. admin September 9th, 2009 4:56PM

    Not sure Corbin, will drop Ian an email – be great if he can post here the details here.

    Now you’ve got a mill look forward to seeing the stuff you make with it!

  3. Sam September 9th, 2009 9:45PM

    Cool, how much weight did you lose?

  4. admin September 10th, 2009 7:40AM

    Sam I had weighed a standard single hole 150 and the milled dual hole, just need to find where I wrote it… DOH! The milled dual hole was lighter by a fair margin.

  5. admin September 16th, 2009 6:32PM

    Corbin heard from Ian (thanks Ian!):

    I used an 8mm ball end cutter. e.g.
    http://www.niagaracutter.com/cobalt/ballend.html

    The pockets themselves are easy to machine on a normal mill but I used the CNC function to cut the frame clearance

  6. Sam January 10th, 2010 1:27AM

    Im curious at how much it cost to mill the 150’s?

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