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#1
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Wrench for White Eccentric Hub?
3/4" seems to fit - but loosely.
Anybody know if it's really 3/4" - in this day of metric-almost-everything? Doesn't take much pressure - but a wrench is needed to tension the chain whenever wheel is reinstalled - so some sort of wrench has to be carried along with the patch kit/spare tube. I'm thinking maybe a pressed steel throwaway wrench that comes with some piece of equipment or another... A POS wrench for a POS bike, so-to-speak. Ideas? -- PeteCresswell |
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#2
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Wrench for White Eccentric Hub?
(Pete Cresswell) wrote:
3/4" seems to fit - but loosely. Anybody know if it's really 3/4" - in this day of metric-almost-everything? Doesn't take much pressure - but a wrench is needed to tension the chain whenever wheel is reinstalled - so some sort of wrench has to be carried along with the patch kit/spare tube. I'm thinking maybe a pressed steel throwaway wrench that comes with some piece of equipment or another... A POS wrench for a POS bike, so-to-speak. A $160 hub on a POS bike? Hmmm, don't tell my Rambouillet! http://sheldonbrown.org/rambouillet I've never needed to use a wrench on the axle of mine. I just turn it by hand, and tighten the left axle nut first, since that is the one where friction on the threads tends to rotate the axle in the direction that tightens the chain. I just went down and checked mine, indeed a 3/4" wrench is a decent but slightly loose fit. 3/4" = 19.05 mm, so my guess is that it's meant to be 19 mm. I don't have a 19 mm open-end wrench here at home to try. My nice metric dial caliper lives at the shop, not at home, and I was going to let it go at that until I remembered that I have one of my dad's old micrometers hanging around, a tool I rarely have occasion to use. The mike gives me 0.7456 with some guesswork about the last digit. That's 18.938 mm. This is not a surface that is intended to be a high precision sizing, and my hub is a very early one, back when the axle caps were being made of titanium instead of steel. I'd say that, despite this being a made-in-USA product, it probably is nominally 19 mm on the flats. http://sheldonbrown.com/harris/white-hubs.html Sheldon "One Of My Favorite Bike Parts" Brown +--------------------------------------------+ | Never worry about theory as long as the | | machinery does what it's supposed to do. | | --Robert A. Heinlein | +--------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
#3
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Wrench for White Eccentric Hub?
"(Pete Cresswell)" wrote in message . ..
3/4" seems to fit - but loosely. Anybody know if it's really 3/4" - in this day of metric-almost-everything? Doesn't take much pressure - but a wrench is needed to tension the chain whenever wheel is reinstalled - so some sort of wrench has to be carried along with the patch kit/spare tube. I'm thinking maybe a pressed steel throwaway wrench that comes with some piece of equipment or another... A POS wrench for a POS bike, so-to-speak. Ideas? Dear Peter, 3/4" = 0.75000" = 19.05mm --too loose? 0.74803" = 19.00mm --princess and pea? 23/32 = 0.71875" = 18.26mm --possibly mythical? 0.70866" = 18.00mm --pressed steel cone wrench? 11/16 = 0.68750" = 17.46mm --c'mon, goldilocks, get real! A 19mm wrench may be slightly smaller, but it may depend on how the manufacturer feels about real versus nominal sizes. More expensive is usually closer to nominal. Good luck finding a 23/32. (I have a 25/32 wrench that's never found a use.) The 18mm is an odd size, but some thin, flat pressed steel cone wrenches are offered in this dimension. I've found a few nuts that actually fit an 18mm. If you don't have one, borrow or buy a dial caliper, which takes some of the frustration out of slightly-off sizes. Any spreadsheet will let you set up a size table. All of these are, of course, idealized sizes, with real wrenches usually being larger than nominal in various haphazard ways. Some nominal 5mm nuts on computers, for example, actually had several variants over the years, and some wouldn't fit inexpensive 5mm nutdrivers, which weren't big enough. Of course, a good small adjustable wrench solves many problems. Good luck, Carl Fogel |
#4
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Wrench for White Eccentric Hub?
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#5
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Wrench for White Eccentric Hub?
Rick Onanian wrote:
On 5 Mar 2004 00:50:42 -0800, (Carl Fogel) wrote: Some nominal 5mm nuts on computers, for example, actually had several variants over the years, and some wouldn't fit inexpensive 5mm nutdrivers, which weren't big enough. Are the nuts in question those that are actually bolts with threaded holes in the head, as used for motherboard risers and serial port securers? When I worked in retail PC service, I found that they existed in two sizes, one metric (5mm) and one standard (3/16"). I always used cheap nut drivers -- in fact, a 1/4" square drive socket on a 1/4" hex drive - square adapter (which then usually went into my craftsman 3.6v cordless driver, perfect for computers, So you're one of those overkill guys? I just got done spraining my wrist trying to get a screw off so I could remove a SCSI card from someone's computer today. Greg |
#6
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Wrench for White Eccentric Hub?
Mmmm.. I agree with Sheldon, my Eric's is not a POS hub.
Now the Bridgestone RB-T it's on might qualify but hey it's what goes between my legs these days, and I like it. I got a tip from a local bike shop fixie rider that I'll pass on: Go to Sears and pickup a 19mm shorty open end wrench, comes with a box on the other end . Fits in a saddle bag (14cm long), fairly hefty, but does the job. I trust your hub is of similar size. Now I've got a question about the same hub. What tool can I use to remove the BMX freewheel I have threaded on the other side? Due to the shape and position of the squared off portion, it won't fit the usual BMX freewheel puller. Phil |
#7
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Wrench for White Eccentric Hub?
On Fri, 05 Mar 2004 23:23:04 GMT, "G.T."
wrote: Rick Onanian wrote: Are the nuts in question those that are actually bolts with threaded holes in the head, as used for motherboard risers and serial port securers? When I worked in retail PC service, I found that they So you're one of those overkill guys? I just got done spraining my wrist trying to get a screw off so I could remove a SCSI card from someone's computer today. No, the screws that hold cards in need not be particularly tight. It's the nut/screws in the back of serial/parallel/vga ports, to which a cable is secured to prevent it from falling off the port, which need extra tightness; users tend to screw those cables in excessively, and when they unscrew the cable, it pulls the nut/screws right out of the port rather than unscrewing the cable from those nut/screws. Then, if the port is on a cable (rather than soldered directly to a board), it proceeds to fall into the depths of the computer; this is because that nut/screw also holds the port to the plate on which it is mounted. It sounds like you have quite a delicate wrist, however; the screw that holds a card in (or any other screw in a computer) isn't strong enough to require much force before it breaks. -- Rick Onanian |
#8
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Wrench for White Eccentric Hub?
RE/
A $160 hub on a POS bike? Hmmm, don't tell my Rambouillet! A little spray paint, remove the new rim's stickers...a little mud.... give it a few months and nobody'll ever know... I wanted a SS that I could ride fixie when the mood struck...but I didn't want yet another bike...So this one does triple duty: SS, errands, occasional city use. I'll hold off on the city use until the shinyness goes away... -- PeteCresswell |
#9
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Wrench for White Eccentric Hub?
that's a beautiful machine!
any issues using the biopace with fixed chain tension? Sheldon Brown wrote: (Pete Cresswell) wrote: 3/4" seems to fit - but loosely. Anybody know if it's really 3/4" - in this day of metric-almost-everything? Doesn't take much pressure - but a wrench is needed to tension the chain whenever wheel is reinstalled - so some sort of wrench has to be carried along with the patch kit/spare tube. I'm thinking maybe a pressed steel throwaway wrench that comes with some piece of equipment or another... A POS wrench for a POS bike, so-to-speak. A $160 hub on a POS bike? Hmmm, don't tell my Rambouillet! http://sheldonbrown.org/rambouillet I've never needed to use a wrench on the axle of mine. I just turn it by hand, and tighten the left axle nut first, since that is the one where friction on the threads tends to rotate the axle in the direction that tightens the chain. I just went down and checked mine, indeed a 3/4" wrench is a decent but slightly loose fit. 3/4" = 19.05 mm, so my guess is that it's meant to be 19 mm. I don't have a 19 mm open-end wrench here at home to try. My nice metric dial caliper lives at the shop, not at home, and I was going to let it go at that until I remembered that I have one of my dad's old micrometers hanging around, a tool I rarely have occasion to use. The mike gives me 0.7456 with some guesswork about the last digit. That's 18.938 mm. This is not a surface that is intended to be a high precision sizing, and my hub is a very early one, back when the axle caps were being made of titanium instead of steel. I'd say that, despite this being a made-in-USA product, it probably is nominally 19 mm on the flats. http://sheldonbrown.com/harris/white-hubs.html Sheldon "One Of My Favorite Bike Parts" Brown +--------------------------------------------+ | Never worry about theory as long as the | | machinery does what it's supposed to do. | | --Robert A. Heinlein | +--------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
#10
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Wrench for White Eccentric Hub?
RE/
Now I've got a question about the same hub. What tool can I use to remove the BMX freewheel I have threaded on the other side? Due to the shape and position of the squared off portion, it won't fit the usual BMX freewheel puller. My Park FR-6 almost fits. Couple touches in a drill press and I bet it would do the trick. -- PeteCresswell |
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