The Unofficial Mamod and Other Steam Forum

alan2525

Does anyone know what size machine screws are used to bolt the cylinders and frames together on the Mamod Locomotive?

I imagine they are 6 BA or something...

Many Thanks!

Alan

Mamodman123 · Posted: Fri Feb 15, 2008 11:44 am Post subject:

Yep 6BA

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Graham-Jilly · Posted: Fri Feb 15, 2008 12:21 pm Post subject:

yep MM ir right

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Spule 4 · Posted: Fri Feb 15, 2008 2:05 pm Post subject:

Just got some replacements from this vendor:

http://www.steamfittings.co.uk/asp/index.asp
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Garrett

alan2525 · Posted: Fri Feb 15, 2008 2:05 pm Post subject:

Thanks for the quick reply! Now all I need to do is buy some 6BA Cheeseheads and another lot of taps and dies!

Isn't standardisation of screw threads great...**mumbles UNC, Metric, BSF...ME...**

Graham-Jilly · Posted: Fri Feb 15, 2008 8:21 pm Post subject:

I found great dificulty finding ba screws here in aus but i found a supplyer and he isnt to dear either.
all the main bolt suppliers only have me these days

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Spule 4 · Posted: Fri Feb 15, 2008 8:55 pm Post subject:

talluncle31 · Newbie Joined: 07 Jan 2008 Posts: 19

If it is of any help, 6BA is the same pitch as American National Fine 4-48 and .002" smaller in diameter. So you can often tap out to 4-48 and use ANF fasteners.

Another useful one to know is that 0BA is the same as M6x1

Murray Wilson

Graham-Jilly · Posted: Sat Feb 16, 2008 12:23 pm Post subject:

thanks Murray

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