1/4" Camera thread?

May 09, 2007 10 Replies

What's the thread for a standard camera mount? Is it 1/4"-20 tpi with



55 degree threadform?

Chris


Yep - there are two standard threads - one is 1/4" Whitworth, the other is 3/8" Whitworth.

Alternatively, you can use the well-known Metric threasds, M6.35 X

1.27 or M9.525 X 1.5875...

Regards, Tony

On or around Wed, 09 May 2007 19:57:33 +0100, Chris Eilbeck enlightened us thusly:

otherwise known as 1/4" whitworth. Yes, I believe so. might be 1/4-20 UNC.

There's also a larger one used on bigger cameras.

The standard thread is definitely Whitworth.

Regards, Tony

We fit a threaded insert to a part at work, to allow it to fit on standard tripods and I'm sure it's 1/4 UNC.

Regards Kevin

In practice, 1/4 W and 1/4 UNC nuts/bolts are interchangeable, and UNC is probably more easily obtainable than Whitworth these days. However, the standard 1/4" camera mount thread is Whitworth.

Regards, Tony

It's 1/4" BSW, which I think is a "yes" to your question.

BugBear

On or around Wed, 09 May 2007 19:59:38 +0100, Tony Jeffree enlightened us thusly:

they'd need to invent a special series with 55 degree thread forms...

Cool. I can go make swarf with confidence now!

Chris

Ooh - just remembered. While there is a (well established) standard for thread form, there is NO standard for the depth of the socket on cameras.

It is possible (and has happened) to put the mounting bolt THROUGH the bottom of the socket, and INTO the guts of the camera.

This is why older tripods has a bolt and a tensioner, as opposed to a simple bolt with a head.

BugBear

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