Capillary tubing

Anyone know where I can get capillary tubing from ?

Best I can suggest is a laboratory supplies place.
What's it for?

John
If you just Goggle capillary tubing there are a lot of hits - various materials, various sizes, etc.
Mike

Thanks Mike

You're welcome - hope you find what you want
Mike

Yep ta Ordered a length of 1.8 mm and asked about 1 mm availability. It's to try repairing an old CO2 motor I have Thanks again John

OD or ID OT (I did a funny )
Copper or stainless ?

OK I got it

Hmmm, actually interested in the answer too, and supplier if possible please?

Sorry Nigel 1.5 mm copper. From a site on E Bay Can't tell you more except it arrived German postmarked

Thanks. It might actually be improved using the larger pipe. I was reading the back of the box for a Telco Turbotank the other day. It claimed the turbotank version was considerably more powerful than the standard, for two reasons. One was (probably) twaddle (I need to verify somehow, maybe sawing up an old worn tanker), the other reason was stated simply because the length of pipe between tank and head was minimised.
My guess is they are implying the pressure drop in the pipe is therefore minimised. Makes sense, there's pressure drop when any fluid (gas and liquid) moves along a pipe, around bends, etc, worsened by smaller diameter pipes. Ask a plummer or gas fitter. Notwithstanding wall thickness of copper cf stainless, the bore of your new pipe may provide higher pressure gas at the engine, thus increasing power (or duration at the same power). It needs some scientific testing...
N

What a bigger bore pipe does is increase the volume of flow and reduce the pressure Nigel .

Sounds very logical John but I think the opposite is true, the larger the pipe the higher the pressure.....something to do with Newton's 2nd law which is a bit beyond me :whistle:

one tenor wrote: What a bigger bore pipe does is increase the volume of flow and reduce the pressure Nigel .

er, no, sorry John that's not correct in this context; bigger bore reduces the pressure drop so the delivered pressure will be higher at the outlet, assuming a given starting pressure like the CO2 tank. happy to discuss other situations or agree to differ.
Anyway, for reference, I measured a few CO2 motor pipe diameters last night. Only a dial calliper so half a thou accuracy at max. Conversion to metric to suit yourself but they look like imperial sizes to me. The G-69 is a metricised version of the G-63 with plastic crankcase made for Aerographics.
For reference:
G-24 .0225" stainless, glued
G-28 .023" same
G-63 .03125"
G-69 .032"
G-120 .0325"
G-300 .0475"
Modela 0,27 .0765" soldered (tinned copper?)
KK 100 (?) .0635" soldered (tinned copper?)

Of course it's gases isn't it