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| Aluminium tubing |
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| Jonny:
Aluminium sizes are nominal at best and are not round, vary in diameters from one extrusion to the next. Add to that unless a special its only in imperial, so well above dia in bore already but could turn o/d down. What lengths we looking at here? From round, drill and ream? |
| yorkie_chris:
Too long to drill and ream, 700mm approx depending on the bike. It has to slide in a bushing which is fixed into fork internals |
| AdeV:
--- Quote from: yorkie_chris on March 31, 2011, 08:46:45 AM ---Too long to drill and ream, 700mm approx depending on the bike. It has to slide in a bushing which is fixed into fork internals --- End quote --- You could drill that deep with a blacksmith's drill + long extension bar - but it'd be a long job (pardon the pun) and very boring (sorry, sorry...). Could you line bore it? I think that's the only way you'll get decent internal bore accuracy along that sort of length. |
| No1_sonuk:
If it's a production job, some kind of gun drill could work. If my calcs are correct, a solid 12mm bar, 700mm long would weigh about 213.7g (@ 2.7g/cm3). 12mm tube with 3mm wall would be 113.4g. Could you live with it being 100g heavier, and use a solid bar? |
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