Anybody has built a pvc training roller?

HI...

I been looking fo info about how to build a pvc traning rollers, do not
look so hard to do but its a little bit easier to ask. The reason to ask is
becasue i havent found any info about it at the web... anybody have a link
or a guide about how to make those rollers at home?...

thanks!...

On Thu, 01 Dec 2005 19:26:21 -0600, noname wrote:

HI...

I been looking fo info about how to build a pvc traning rollers, do not
look so hard to do but its a little bit easier to ask. The reason to ask is
becasue i havent found any info about it at the web... anybody have a link
or a guide about how to make those rollers at home?...

I wouldn't want to without a machine shop, and it should be obvious to anyone
who has one.

This will not be about taking some schedule 40 plumbing and sticking in some
bearings.

Ron

RonSonic wrote:
On Thu, 01 Dec 2005 19:26:21 -0600, noname wrote:


HI...

I been looking fo info about how to build a pvc traning rollers, do not
look so hard to do but its a little bit easier to ask. The reason to ask is
becasue i havent found any info about it at the web... anybody have a link
or a guide about how to make those rollers at home?...


I wouldn't want to without a machine shop, and it should be obvious to anyone
who has one.

This will not be about taking some schedule 40 plumbing and sticking in some
bearings.

Ron

Some of the old guys from around here use to use old conveyer belt
rollers from the mine.

Marty

On Fri, 02 Dec 2005 17:48:20 +0800, Marty wrote:

RonSonic wrote:
On Thu, 01 Dec 2005 19:26:21 -0600, noname wrote:


HI...

I been looking fo info about how to build a pvc traning rollers, do not
look so hard to do but its a little bit easier to ask. The reason to ask is
becasue i havent found any info about it at the web... anybody have a link
or a guide about how to make those rollers at home?...


I wouldn't want to without a machine shop, and it should be obvious to anyone
who has one.

This will not be about taking some schedule 40 plumbing and sticking in some
bearings.

Ron

Some of the old guys from around here use to use old conveyer belt
rollers from the mine.

Marty

That's the sort of overkill you'd want.

Ron

noname wrote:
HI...

I been looking fo info about how to build a pvc traning rollers, do not
look so hard to do but its a little bit easier to ask. The reason to ask is
becasue i havent found any info about it at the web... anybody have a link
or a guide about how to make those rollers at home?...

thanks!...


http://groups.google.com/group/aus.b...dd8ee1e52e31ac

I haven't seen anything like it, but I don't think it would be too
hard to do. I've built lots of stuff with PVC...

There are a couple ways to go. You could put bearings in the rollers,
or just make solid rollers with a shaft and put the bearings in the
frame. The latter seems easier.

Get some 4" PVC and end caps. Drill holes for the shaft in the end
caps. Fill the thing with plaster or concrete.

Make a PVC frame using schedule 40 also. Install T fittings at the
roller positions. Mount bearings (in-line skate wheels?) on plugs to
fit the tees.

Two concerns come to mind.

1. What level on concentricity does standard PVC have?
2. What would the wear rate be for the rollers?

My guess is that PVC will have worst concentricity than cheap $200 rollers
and that the PVC will wear noticeably with moderate use. Also note that PCV
for water use is spec for low temp use. If they heat up appreciably ~180 F
I would expect them to deform.

cel


wrote in message
...
I haven't seen anything like it, but I don't think it would be too
hard to do. I've built lots of stuff with PVC...

There are a couple ways to go. You could put bearings in the rollers,
or just make solid rollers with a shaft and put the bearings in the
frame. The latter seems easier.

Get some 4" PVC and end caps. Drill holes for the shaft in the end
caps. Fill the thing with plaster or concrete.

Make a PVC frame using schedule 40 also. Install T fittings at the
roller positions. Mount bearings (in-line skate wheels?) on plugs to
fit the tees.

On Sun, 4 Dec 2005 23:41:05 -0800, wrote:

Two concerns come to mind.

1. What level on concentricity does standard PVC have?
2. What would the wear rate be for the rollers?

My guess is that PVC will have worst concentricity than cheap $200 rollers
and that the PVC will wear noticeably with moderate use. Also note that PCV
for water use is spec for low temp use. If they heat up appreciably ~180 F
I would expect them to deform.

I don't know where heat would come from, but you may be right about
both the ultimate roundness and the wear. Imperfect roundness will
give you a "bumpy" ride (as will imprefectly centering the axle), but
so what? Roads are bumpier and it doesn't seem to be a problem for
most bikes.

This is probably one of those things that would just have to be tried
to know for sure if it works.

On Thu, 01 Dec 2005 19:26:21 -0600, noname wrote:

HI...

I been looking fo info about how to build a pvc traning rollers, do not
look so hard to do but its a little bit easier to ask. The reason to ask is
becasue i havent found any info about it at the web... anybody have a link
or a guide about how to make those rollers at home?...

You mean building one from PVC pipe? Futile. It's not stiff enough.
But don't take my word for it. Run down to the store and buy what you
think you'll need, try to come up with something that works, and
report back with the results.
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

On Sun, 4 Dec 2005 23:41:05 -0800, wrote:

Two concerns come to mind.

1. What level on concentricity does standard PVC have?
2. What would the wear rate be for the rollers?

My guess is that PVC will have worst concentricity than cheap $200 rollers
and that the PVC will wear noticeably with moderate use. Also note that PCV
for water use is spec for low temp use. If they heat up appreciably ~180 F
I would expect them to deform.

Don't forget the grounding cable for the rider so that the static
charge can be drained off before dismounting.
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.