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i think i need a drill press?
Posted:
Sat Mar 01, 2008 3:30 amby derrickito
with one giant bit. or something...
i have one of these drive side sprockets:
i need to widen the hole in the middle. anyone have access to anything that would do the job?
Re: i think i need a drill press?
Posted:
Sat Mar 01, 2008 3:00 pmby n_claw
Re: i think i need a drill press?
Posted:
Sat Mar 01, 2008 3:15 pmby SeditiousCanary
Posted:
Sun Mar 02, 2008 2:26 pmby haulincolin
That's actually a fairly difficult problem if it needs to stay nearly concentric with the bolt circle. Someone with a powerfull drill press or milling machine might be able to do it with a hole saw. (We have one, but it's taken apart right now.) For even more accuracy, it could be bolted to a faceplate on a metal lathe and bored out.
However, if it doesn't really matter how chewed up the hole gets as long as it fits over the hub, then you can just go at it with some kind of small grinding tool, like a die grinder, or even a dremel.
Posted:
Sun Mar 02, 2008 6:56 pmby derrickito
i put up an ad on craigslist. maybe i can find someone there. if all else fails ill just get a grind bit and wack at it with my makita for hours
colin, i still need some of that welding i talked to you about, ill call you this coming week.
Posted:
Sun Mar 02, 2008 7:06 pmby Happy Stick Person
Posted:
Sun Mar 02, 2008 9:19 pmby Alex
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Sun Mar 02, 2008 9:22 pmby derrickito
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Sun Mar 02, 2008 9:30 pmby ksep
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Sun Mar 02, 2008 9:40 pmby derrickito
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Mon Mar 03, 2008 1:18 pmby TrikerTrev
Posted:
Mon Mar 03, 2008 2:02 pmby surlykat
Can someone pls explain wtf is going on in the picture Derrick posted? i've been trying to puzzle it out, but can't figure out what I'm looking at. Bizarre braking mechanism? Ghetto-internally-geared hub? Electric assist?
- bike n00b
Posted:
Mon Mar 03, 2008 2:10 pmby derrickito
2 chain drive system. one on the right side powered by pedals, the alternate one on the left side (with the problem cog) is powered by an 80cc gas engine.
ive got the entire thing built and ready to fire up, just waiting on this cog to get bored out.
Posted:
Mon Mar 03, 2008 2:42 pmby jeff
What's the rule of the law for this beast? It's motorized, do you need to license it?
Posted:
Mon Mar 03, 2008 2:44 pmby surlykat
You're technically supposed to have a license for anything above 49cc...
Posted:
Mon Mar 03, 2008 2:46 pmby Eric_s
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Mon Mar 03, 2008 2:48 pmby jeff
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Mon Mar 03, 2008 2:54 pmby derrickito
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Mon Mar 03, 2008 10:43 pmby derrickito