January 22, 2015

Calculate clamp force on bike handlebar

Calculate clamp force on bike handlebar

Quote:
Originally Posted by gafferino
(Post 3243169)
Hi Folks

I am looking for some help in a calculation if possible.

I am looking at a bike design where the handlebars are clamped in place in the stem using only 1 bolt – see the picture attached or link below for an example.

http://i.ebayimg.com/00/s/MTE5OFgxNj…Now~~60_35.JPG

Click the image to open in full size.

There has been issues with the handle bars slipping forward when in use. I think that this is a manufacturing problem and not a design issue as this type of stem with one bolt is quite common.

However I would like to prove this with maths.
How do I calculate the force that the bolt and clamp have on the handlebars? I would like to compare a calculation of 1 bolt versus 2 and 4.

Any help greatly appreciated.

Thanks

no image . is this on a custom bike of some kind ?, is it possible the clamp does not pinch up tight enough to get a good clamp on the bars ?, you might need to file/hacksaw the gap in the clamp a bit to improve the clamping . if the gap is already big enough then you might just need to roughen the bars where they meet the clamp .

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