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Posted by Matt Stawicki on February 21, 2008, 10:51 am
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>I want to have a go at making some custom handlebar risers for a=20
>motorbike. I'll be using 53mm dia' round bar but I'm having trouble=20
>working out how to drill/bore the hole where the bars seat. It needs to=20
>be split into 2 sections, the bottom section is fastened to the bike and=
=20
>the top section clamps to this over the bars. The hole for the bars=20
>needs to be approx 22mm (7/8ths) and will have to be reamed out for=20
>accuracy.
>
>If I drill the hole out first then cut it on a bandsaw I'm going to lose=
=20
>the accuracy of the diameter with the width of the cut, I don't think=20
>that my bandsaw will create an accurate enough cut anyway. Is it=20
>possible to drill through the middle of two sections clamped together or=
=20
>will I have to drill two holes in the stock, cut, then mate two sections=
=20
>together?
>
>
>
>http://tinyurl.com/yrlo5d
Yes. You can clamp 2 pieces together with a shim, the thickness of the
gap you want, between the two pieces. You could run into trouble with
a drill, however. Unless you have a very ridged set-up. Even so, I
would drill it undersize, and bore it to size.
Matt
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> possible to drill through the middle of two sections clamped together