Help!! Need some sort of pipe and can't find what I need!
Discussion
Evening all,
I recently built a mountain bike with a variety of second hand parts for my son's 10th birthday. All went perfectly well except for one thing...
The front wheel has a bolt-thru (urgh... Bloody Americans!) axle which goes through the forks on either side and the wheel hub in the middle. The stupid bloody thing has an end which opens out to secure it in place (unlike other brands which screw into place). All well and good, you might think, except it keeps opening up inside the hub.
There are interchangeable spacers either end of the hub, with a wider diameter gap between the spacers, and the stupid quick release keeps getting stuck inside the hub, so I'm having to dismantle the quick release every time I have to take the front wheel off (which is twice every Saturday morning!) by means of pulling off a circlip with a pair of pliers and then unscrewing it all, so it's anything but quick!
The simple answer would just be to fill the gap between the two spacers with a piece of plastic tubing of the same inside and outside diameter as the spacers, but here's the problem... I can't find any that's the right size!
Question, therefore... Does anyone know of anywhere that I can get a piece of rigid tubing with an Inside Diameter of 15mm and an Outside Diameter of 20mm? It only needs to be about 60-70mm long, and I'm happy to buy a metre or two if I have to and just cut a bit off the end, but I just can't find anything in that size!
I can find aluminium pipe with an OD of 20mm and an ID of 14mm, but I've no idea how I'd go about shaving off 1mm all round, and I can find (and indeed have) plastic tubing with an OD of 20mm and an ID of 17mm, but the stupid QR still opens up in this, so the tolerances seemingly are pretty fine.
I recently built a mountain bike with a variety of second hand parts for my son's 10th birthday. All went perfectly well except for one thing...
The front wheel has a bolt-thru (urgh... Bloody Americans!) axle which goes through the forks on either side and the wheel hub in the middle. The stupid bloody thing has an end which opens out to secure it in place (unlike other brands which screw into place). All well and good, you might think, except it keeps opening up inside the hub.
There are interchangeable spacers either end of the hub, with a wider diameter gap between the spacers, and the stupid quick release keeps getting stuck inside the hub, so I'm having to dismantle the quick release every time I have to take the front wheel off (which is twice every Saturday morning!) by means of pulling off a circlip with a pair of pliers and then unscrewing it all, so it's anything but quick!
The simple answer would just be to fill the gap between the two spacers with a piece of plastic tubing of the same inside and outside diameter as the spacers, but here's the problem... I can't find any that's the right size!
Question, therefore... Does anyone know of anywhere that I can get a piece of rigid tubing with an Inside Diameter of 15mm and an Outside Diameter of 20mm? It only needs to be about 60-70mm long, and I'm happy to buy a metre or two if I have to and just cut a bit off the end, but I just can't find anything in that size!
I can find aluminium pipe with an OD of 20mm and an ID of 14mm, but I've no idea how I'd go about shaving off 1mm all round, and I can find (and indeed have) plastic tubing with an OD of 20mm and an ID of 17mm, but the stupid QR still opens up in this, so the tolerances seemingly are pretty fine.
mgtony said:
Can you not drill the 14mm ali one out to 15mm? 
I'm sure I could if I had a pillar drill and stand to keep it straight and true, but I can't imagine I'd be very successful with a handheld drill and a bench vice, would I? Or would it just run through straight pretty much of its own accord?Kermit power said:
I'm sure I could if I had a pillar drill and stand to keep it straight and true, but I can't imagine I'd be very successful with a handheld drill and a bench vice, would I? Or would it just run through straight pretty much of its own accord?
If by handheld you mean a conventional power drill then yes it would take you about 2 seconds to do with a hss bit in a vice.Just don't over tighten the tube else it might distort
mgtony said:
Just had a look and black conduit/trunking is that size:
Unfortunately, whilst the outside diameter is right, the inside diameter is either 16 or 17mm, and the QR still catches on it.I have just ordered some 20mm aluminium tubing which has a 14mm inside diameter, and also a 15mm HSS drill bit to take out the extra 1mm. The nice customer services people at Hope have also confirmed exactly how long the gap is between the two spacers, so I know exactly what length I need to cut it to.
Thanks for the suggestions though! I'll feed back on how it goes. :cheers:
Kermit power said:
_rubinho_ said:
This being PH shouldn't you get somebody to draw it up in CATIA then get it CNC machined from billet aluminium and then anodised in a suitably garish colour?
At the moment, I'm just wondering how I'm going to cut it down to precisely 37.4mm!
what about a large pipe cutter if not all the way through but enough to give you a good solid grove to cut in ?
Gassing Station | The Lounge | Top of Page | What's New | My Stuff