[modeleng] Re: To BA or not to BA, that is the question.

Hi Aaron, as Adrian has pointed out, the choice of BA threads is largely a
matter of personal preference, HOWEVER there are a few things to bear in
mind when making the chioce.

1. For general work metric is fine (and superior in many cases)

2. For modelling I have yet to come across a metric thread that 'looked
right'

3. It is much easier to find the little hex heads we all know & love in BA.

It is not too far back in the dim recesses of the past when most modellers
used Whitworth threads, with BA being a comparitively modern trend.


> As I get all of my bits and pieces pulled together for my first practical
machining exercises, I have noticed that all of the nut and bolt sizes on
the various plans are BA's. As these plans are all quite old they probably
predate the modern metric taps and dies that are all I have. Is there any
reason why I should not use the nearest metric equivalent, or should I save
up for a set of BA ones please? I have just been on Tracy Tools' web site
and they have a 0 to 10 BA set of taps for £18 and the matching set of dies
for £20, plus another £5 for the correct tapping drills, which comes to £43,
plus another £8.60 in post and packing. I am not overly mean but I can buy
an awful lot of metal to machine for the total cost of £51.60! This assumes
that I will not need any for 11 and 12 BA, which would be extra.
> Thanks in advance,
>
> Tony Wells.
>
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