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From: Scion on 22 Jul 2010 08:08
My last two foot pumps have been Halfords branded twin cylinder jobbies. On
both of them the rivets holding the foot plate to the body have worn,
eventually failing.

I would like a more sturdy alternative. Any suggestions? Don't want a
plug-in compressor type as it will be used for bike tyres, footballs, lilos
etc.

Also how much more effort are the single cylinder ones? Does another
cylinder make a big difference, i.e. twice as much air per push?


From: Chris Whelan on 22 Jul 2010 08:49
On Thu, 22 Jul 2010 12:41:39 +0000, A.Clews wrote:

[...]

> Problem is, how do you determine how accurate they are? What do you
> use to measure? I have several tyre pressure gauges of various
> descriptions and they all give different readings.

Generally, there doesn't seem to be any way to test them, no.

I was lucky enough to have access to all sorts of test equipment whilst I
was working. I rigged up a tester for car pressure gauges, and tried all
the ones I had, and those of colleagues.

Most of them were acceptably accurate; the best one was within 0.5psi
across its usable range, so that's the one I use.

Interestingly, (or perhaps not!) it was the cheapest digital one that
Halford's sold.

Chris

--
Remove prejudice to reply.
From: Mike G on 22 Jul 2010 12:55

"Chris Whelan" <cawhelan(a)prejudicentlworld.com> wrote in message
news:u7X1o.277661$Yb4.73600(a)hurricane...
> On Thu, 22 Jul 2010 12:41:39 +0000, A.Clews wrote:
>
> [...]
>
>> Problem is, how do you determine how accurate they are? What do you
>> use to measure? I have several tyre pressure gauges of various
>> descriptions and they all give different readings.
>
> Generally, there doesn't seem to be any way to test them, no.
>
> I was lucky enough to have access to all sorts of test equipment whilst I
> was working. I rigged up a tester for car pressure gauges, and tried all
> the ones I had, and those of colleagues.
>
> Most of them were acceptably accurate; the best one was within 0.5psi
> across its usable range, so that's the one I use.
>
> Interestingly, (or perhaps not!) it was the cheapest digital one that
> Halford's sold

Seconded.
I also found my cheap Halfords digital guage accurate within about 0.5 psi,
after I checked it at work against a few 'accurate' industrial type pressure
guages.
Mike..


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