I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

--
AnthonyL

Why do scientists need to BELIEVE in anything?

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

On 05/05/2020 20:26, newshound wrote:
On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only.Â* The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

A bit like this

https://www.halfords.com/cycling/bik...mp-227950.html

you don't always have to tighten the nut, simply push the rubber
component over the presta valve and friction is often enough to hold it on.



--
Chris B (News)

On Tue, 5 May 2020 20:26:31 +0100, newshound
wrote:

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

Is there a name or do you have any link as I can't at the moment find
anything? Though probably not worth the effort. What's the advantage
of designing it that way?


--
AnthonyL

Why do scientists need to BELIEVE in anything?

On 05/05/2020 20:59, AnthonyL wrote:
On Tue, 5 May 2020 20:26:31 +0100, newshound
wrote:

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

Is there a name or do you have any link as I can't at the moment find
anything? Though probably not worth the effort. What's the advantage
of designing it that way?


Here is a video of a similar pump in use
https://youtu.be/I6J8D0RLmFo
not been able to find the spares you need though

--
Chris B (News)

On 05/05/2020 20:59, AnthonyL wrote:
On Tue, 5 May 2020 20:26:31 +0100, newshound
wrote:

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

Is there a name or do you have any link as I can't at the moment find
anything? Though probably not worth the effort. What's the advantage
of designing it that way?


No but another poster has already spotted it. If this were mine I would
be checking whether this is a standard thread, for example it might well
be a BSP as used on plumbing fittings. So you might find that one of the
nuts off a compression fitting would fit, then I would see if I had a
bit of spongy rubber from which I could make the "washer" bit. I have
some foamed EVA about 12mm and 18mm thick that might do the job. Or you
could cast some "plumbing" silicone in the space, with a suitable bit of
stick where the valve should go. But you would have to decide how much
your time is worth. Another possibility might be to "glue in" one of the
flexible hoses to suit your bike valve. I'd probably use epoxy, but if
you can find a nut about the right size then hot melt glue could work as
well (relying on the nut to stop it being forced out by the gas pressure).

On Tue, 5 May 2020 20:26:31 +0100, newshound
wrote:

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

Got it thanks. Someone must have pinched the nut before I bought it
and the last time I had bought a pump would have been when Dunlop
valves were the norm and there was a 6" tube adapter that pushed down
the middle of the pump handle.

I've since bought a mini-pump but the "nut" fits inside. And now I
discover that the old fashioned pump would have worked fine!


--
AnthonyL

Why do scientists need to BELIEVE in anything?

On Tue, 05 May 2020 20:47:38 GMT, lid (AnthonyL)
wrote:

snip

I've since bought a mini-pump but the "nut" fits inside. And now I
discover that the old fashioned pump would have worked fine!

I thought it looked 'ok' from the pic but wasn't sure if you had lost
the runner insert?

And you know the idea of that pump is that it mounts inside the frame,
in front of the seat post (I think).

Cheers, T i m

"Chris B" wrote in message
...
On 05/05/2020 20:59, AnthonyL wrote:
On Tue, 5 May 2020 20:26:31 +0100, newshound
wrote:

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a
seal.

Is there a name or do you have any link as I can't at the moment find
anything? Though probably not worth the effort. What's the advantage
of designing it that way?

I've always wondered why this sort of pump with no flexible hose from pump
to valve has become so popular. The ones with a flexible hose allow for a
bit of movement of the pump as you are operating it, without flexing the
valve stem on the wheel. The "tubeless" ones don't have that flexibility, so
as you work the pump you strain the valve stem unless you take great pains
to brace the pump against the spokes of the wheel - and that probably
doesn't do them any good.

I wish *all* bikes had Schrader (car tyre) valves. I know why a lot of
modern bikes have Presta instead, because those are narrower and can fit
through a smaller hole in the wheel, but Prestas are a PITA because you have
to loosen the screw to pump the tyre up and then remember to tighten it
afterwards, and a lot of air seems to leak out while the valve is in the
"delicate" inflation state. And you have to remember to carry a Schrader to
Presta adaptor (and not lose it at the bottom of a saddle bag) in order to
use a pump for car tyres - I mean a foot-pump, not one of the high-pressure
airlines at garages which say "not for bicycles". When I did a lot of
cycling I carried a car foot-pump in my saddle bag because it was a lot
quicker to pump up a tyre with a slow puncture than using a normal bike
hand-pump.

AnthonyL wrote:

I hurriedly bought a pump some years back and have never been able to
use it.

Usually there's a locking lever, your photo doesn't appear to show one?

On Wed, 6 May 2020 03:26:32 +0100, Andy Burns
wrote:

AnthonyL wrote:

I hurriedly bought a pump some years back and have never been able to
use it.

Usually there's a locking lever, your photo doesn't appear to show one?

There isn't one, nor any apparent provision for one.

--
AnthonyL

Why do scientists need to BELIEVE in anything?

On Tue, 5 May 2020 21:43:32 +0100, Chris B wrote:

On 05/05/2020 20:59, AnthonyL wrote:
On Tue, 5 May 2020 20:26:31 +0100, newshound
wrote:

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

Is there a name or do you have any link as I can't at the moment find
anything? Though probably not worth the effort. What's the advantage
of designing it that way?


Here is a video of a similar pump in use
https://youtu.be/I6J8D0RLmFo
not been able to find the spares you need though


Thanks. Since when did a pump get so complex?


--
AnthonyL

Why do scientists need to BELIEVE in anything?

On Tue, 5 May 2020 21:45:46 +0100, newshound
wrote:

On 05/05/2020 20:59, AnthonyL wrote:
On Tue, 5 May 2020 20:26:31 +0100, newshound
wrote:

On 05/05/2020 20:13, AnthonyL wrote:
I hurriedly bought a pump some years back and have never been able to
use it.

https://www.flickr.com/photos/79018230@N05/49860238831

It has an external thread so I guess something is supposed to fasten
on to it.

I've put a standard Schrader/Presta adapter alongside for scale
purposes only. The pump has no internal thread(s).

I think you have bits missing. There should be a sort of "nut" that goes
on the external thread, except that it has an internal flange. There
should be a rubber component that fits inside the bit with the threads
on. This should have a hole about 6mm diameter that a normal "high
pressure" bike tyre valve fits into. When you tighten the "nut" it
compresses the rubber bush so that it grips the valve and provides a seal.

Is there a name or do you have any link as I can't at the moment find
anything? Though probably not worth the effort. What's the advantage
of designing it that way?


No but another poster has already spotted it. If this were mine I would
be checking whether this is a standard thread, for example it might well
be a BSP as used on plumbing fittings. So you might find that one of the
nuts off a compression fitting would fit, then I would see if I had a
bit of spongy rubber from which I could make the "washer" bit. I have
some foamed EVA about 12mm and 18mm thick that might do the job. Or you
could cast some "plumbing" silicone in the space, with a suitable bit of
stick where the valve should go. But you would have to decide how much
your time is worth. Another possibility might be to "glue in" one of the
flexible hoses to suit your bike valve. I'd probably use epoxy, but if
you can find a nut about the right size then hot melt glue could work as
well (relying on the nut to stop it being forced out by the gas pressure).

I know this is DIY but ...

--
AnthonyL

Why do scientists need to BELIEVE in anything?

On 06/05/2020 08:35, AnthonyL wrote:


No but another poster has already spotted it. If this were mine I would
be checking whether this is a standard thread, for example it might well
be a BSP as used on plumbing fittings. So you might find that one of the
nuts off a compression fitting would fit, then I would see if I had a
bit of spongy rubber from which I could make the "washer" bit. I have
some foamed EVA about 12mm and 18mm thick that might do the job. Or you
could cast some "plumbing" silicone in the space, with a suitable bit of
stick where the valve should go. But you would have to decide how much
your time is worth. Another possibility might be to "glue in" one of the
flexible hoses to suit your bike valve. I'd probably use epoxy, but if
you can find a nut about the right size then hot melt glue could work as
well (relying on the nut to stop it being forced out by the gas pressure).

I know this is DIY but ...

You do know I am an engineer, don't you :-)

On 06/05/2020 08:34, AnthonyL wrote:
On Wed, 6 May 2020 03:26:32 +0100, Andy Burns
wrote:

AnthonyL wrote:

I hurriedly bought a pump some years back and have never been able to
use it.

Usually there's a locking lever, your photo doesn't appear to show one?

There isn't one, nor any apparent provision for one.

I have seen both sorts. The "nut" lets you adjust the compression on the
rubber to compensate for wear.

On 06/05/2020 03:26, Andy Burns wrote:

Usually there's a locking lever

Not on this version there isn't.

My track pump has one

https://encrypted-tbn0.gstatic.com/i...gVpDa&usqp=CAc
(Not this model ;just in case you didn't know what one looked like)

but the one I travel about with doesn't

https://www.bankruptbikeparts.co.uk/...33-800x600.jpg
(again similar to mine but not the particular one )

Note :- the small hand pump can do high volume OR high pressure,
middle length of barrel can be opened to allow greater `volume or fitted
inside greater diameter barrel to allow higher pressure to be applied .
I have never actually used this feature (bit gimicky for my taste but
it was cheap and was available when the other more expensive 'wee' pump
broke whilst I was out on a ride). The 'wee' pump has no pressure gauge
so it is pretty much pump until tyres are hard job. Then if greater
accuracy is required the big pump is used when I get home