Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: Geoff Cropper on March 17, 2011, 09:38:45 pm

Title: Threads - 2BA or 5mm ?
Post by: Geoff Cropper on March 17, 2011, 09:38:45 pm

Hi guys,          I have an old brass ww2 type propeller threaded either 2BA or 5mm.      How do I find what thread it is, as I'm told that 2BA and 5mm are almost identical ?         George Sitek doesn't do BA threads any more.    Does anyone still make BA threaded prop-shafts?          I'll visit the hardware shop tomorrow for a 5mm bolt.        Sorry, should have thought of that before, another senior moment eh.          Regards  Geoff.

Title: Re: Threads - 2BA or 5mm ?
Post by: brianB6 on March 18, 2011, 06:31:31 am

If its very old it is almost certainly 2BA
You might have to buy a 2BA die to thread the shaft and don't forget some cutting oil!

Title: Re: Threads - 2BA or 5mm ?
Post by: sarge257 on March 18, 2011, 04:47:51 pm

Hi Geoff.  I recently got some 2Ba prop shafts made from the firm below.
Model Box
P.O. Box 3651
Bracknell
Berkshire
RG12 7UP
07786 485568

Title: Re: Threads - 2BA or 5mm ?
Post by: Geoff Cropper on March 18, 2011, 05:22:51 pm

Thanks Sarge, I'll check it out soonest, cheers, Geoff.

Title: Re: Threads - 2BA or 5mm ?
Post by: Tutssy on March 18, 2011, 05:51:47 pm

2BA or not 2BA? %%

Title: Re: Threads - 2BA or 5mm ?
Post by: john s 2 on March 18, 2011, 08:31:42 pm

That is the question.