Arnold F. Posted December 27, 2012 Report Share Posted December 27, 2012 What is the thread size and pitch on boom poles? Is it 3/8-16? Thank you! Quote Link to comment Share on other sites More sharing options...
Bash Posted December 27, 2012 Report Share Posted December 27, 2012 I believe that it is 3/8" Whitworth Kindest, Simon B Quote Link to comment Share on other sites More sharing options...
Jon Gilbert Posted December 27, 2012 Report Share Posted December 27, 2012 Bash is right. Quote Link to comment Share on other sites More sharing options...
Malcolm Davies Amps CAS Posted December 27, 2012 Report Share Posted December 27, 2012 I believe that it is 3/8" Whitworth Kindest, Simon B If Whitworth isn't an option in the US then 3/8" UNC is exactly the same. Malcolm Davies. A.m.p.s. Quote Link to comment Share on other sites More sharing options...
Arnold F. Posted December 27, 2012 Author Report Share Posted December 27, 2012 This is probably what happens when you're 5am job gets cancelled. You start posting and only the people who use Whitworth are awake to answer! With what might be considered sacrilegious intent, I wish to mount a go pro to a spare boom I have so I need to adapt whatever threads they are to 1/4-20. It looks like it's 3/8-16. The boom, btw, is an old LTM. Quote Link to comment Share on other sites More sharing options...
Malcolm Davies Amps CAS Posted December 27, 2012 Report Share Posted December 27, 2012 This is probably what happens when you're 5am job gets cancelled. You start posting and only the people who use Whitworth are awake to answer! With what might be considered sacrilegious intent, I wish to mount a go pro to a spare boom I have so I need to adapt whatever threads they are to 1/4-20. It looks like it's 3/8-16. The boom, btw, is an old LTM. There are adapters available to go from 3/8 to 1/4. Canford Audio in the UK sell them but I would suspect that PSC or Remote Audio do the same range. I'm fortunate in that I have a small machine shop and can make my own. Malcolm Davies. A.m.p.s. Quote Link to comment Share on other sites More sharing options...
Eric Toline Posted December 27, 2012 Report Share Posted December 27, 2012 3/8" 16 pitch iirc. Eric Quote Link to comment Share on other sites More sharing options...
Arnold F. Posted December 27, 2012 Author Report Share Posted December 27, 2012 If that's true then I believe it's different from the camera department equivalent, which I think is 3/8-16? 3/8" 27 pitch iirc. Eric Quote Link to comment Share on other sites More sharing options...
Bash Posted December 27, 2012 Report Share Posted December 27, 2012 Technically I think that UNC and Whitworth do differ slightly, but I believe that they are generally and largely compatible!!!!! Kindest, Simon B Quote Link to comment Share on other sites More sharing options...
Jeff Wexler Posted December 27, 2012 Report Share Posted December 27, 2012 Whitworth! Haven't even thought about that since the very old days of my working on British sports cars. My first cars were almost all British and of course I had to work on all of them! MGA, MGB, Austin Healy Sprite, Austin Healy Le Mans, etc. Quote Link to comment Share on other sites More sharing options...
dfisk Posted December 27, 2012 Report Share Posted December 27, 2012 We actually make something designed specifically for converting your 3/8x16 thread to 1/4x20 AND it has a ball head to work with your GoPro. It's called the KCAMBH. It's what I use to put my GoPro on our 20 foot poles to make myself into a portable jib. http://ktekbooms.com/pinnipedi/wp-content/uploads/2011/04/KCAMBH_005.jpg Quote Link to comment Share on other sites More sharing options...
OmahaAudio Posted December 27, 2012 Report Share Posted December 27, 2012 Whitworth! Haven't even thought about that since the very old days of my working on British sports cars. My first cars were almost all British and of course I had to work on all of them! MGA, MGB, Austin Healy Sprite, Austin Healy Le Mans, etc. Lucas Electrics, whose real company slogan was "Prince of Darkness". JW, you ought to love this... (http://www.kitcar.com/articles-kitcar/humordept/lucas-prince.html) Quote Link to comment Share on other sites More sharing options...
Simon Davies Posted December 28, 2012 Report Share Posted December 28, 2012 Technically I think that UNC and Whitworth do differ slightly, but I believe that they are generally and largely compatible!!!!! Kindest, Simon B The standards of Whitworth (aka BSW) & UNC 3/8" threads have slightly different thread angles (BSW 55 degrees & UNC 60 degrees), and therefore are only compatible in certain combinations. The following combinations work: BSW male - BSW female UNC male - UNC female BSW male - UNC female The combination of UNC male - BSW female however won't fit together.... This will therefore cause problems when a BSW female thread is used on a handle of boom adaptor, and a UNC male thread is used on a pole. Here's a link with a sketch that explains the angle quite well: http://tinyurl.com/c83wkm2 Cheers, Simon Davies, Rycote Quote Link to comment Share on other sites More sharing options...
greg sextro Posted December 28, 2012 Report Share Posted December 28, 2012 I believe it's also referred to as "3/8 coarse" here in the US. Quote Link to comment Share on other sites More sharing options...
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