Marble sized barrel

[brumby]

Does anyone know the right sized barrels to shoot marbles?

[ProfessorAmadeus]

1/2 inch sch. 40
and this is soo my message can be posted.

[POS]

or 16 mm ID, tyou can use a 18 mm copper pipe, they are exellent for marbles.

[killagorrila99]

Try 15mm black irigation pipe like on my mg.

[POS]

15 ? A marble is 16 mm ....

[killagorrila99]

Not in australia 8)

[CS]

If I recall correctly, 'pipe' generally is measured by its ID, and 'tube' of its OD. Either way, here in the US the ID of a pipe is similar to the measurement given. I dont know why in hell it is, but pipes tend to be slightly over there 'pipe size'. Same might be with the meteric system. Possibly a 15mm 'pipe' actually has a ID of ~16mm. Just a hunch.

[MrCrowley]

yeah, 40mm PN12(175psi) pipe has an I.D of 43mm and 15mm pipe has an I.D of 17.2mm i think

[GalFisk]

18mm metric copper tube is almost perfect, if you can get it. Some marbles may be too big though, because they're manucactured with quite wide tolerances.

[mark.f]

I don't know if this is helpful to all the SI nazis, but averaging all my marble measurements gave me an O.D. of .566"

[ProfessorAmadeus]

Is that measured with those new calipers of Yours?

[mark.f]

Yes. I measured it in English class, too.