Boyd Hobbs Posted October 23, 2010 Share Posted October 23, 2010 I'm trying to build a custom mitchell mount into an aluminum plate. Much like this one: I was looking for the important dimensions. I can't seem to find them anywhere--at least not specific enough to machine with. I need the: Insert width & depth Hole width & depth Key width I'm not sure the hole depth is important, but I'm going to assume it is for now. Any help would be greatly appreciated. 1 Link to comment Share on other sites More sharing options...
Sanjay Sami Posted October 23, 2010 Share Posted October 23, 2010 Not as specific as you may like, but perhaps something you can begin with. Took these pics of a hybrid riser. http://www.steadicamforum.com/index.php?showtopic=11961 Link to comment Share on other sites More sharing options...
Premium Member Hal Smith Posted October 24, 2010 Premium Member Share Posted October 24, 2010 Get in touch with O'Connor, they'll have the dimensions and might take pity on you. Another source might be Ron Dexter. Link to comment Share on other sites More sharing options...
Premium Member Dom Jaeger Posted October 25, 2010 Premium Member Share Posted October 25, 2010 From measurements I've got: On an O'Connor with a Mitchell base the doughnut shaped part that protrudes and locates the head is 4 1/8" OD and 3 1/4" ID. It extends almost 15/64" from the base. On Ronford legs the mount has a lip that goes inside the 3 1/4" diameter. The mount you pictured would locate outside the 4 1/8" OD. So you need the insert diameter to snugly fit 4 1/8" and be slightly deeper than 15/64", maybe 1/4". The key is 3/8" wide, centred 3" from the base centre. The hole size on a Ronford legs Mitchell base is about 2 7/8" diameter and about 1/4" deep. It can vary, as long as the lock-off covers the diameter and the depth allows you to get enough thread turns to lock off securely. 1 Link to comment Share on other sites More sharing options...
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