Crawford 5C TruGrip to regular 5C conversion?

[Donovan KaardalParticipant @donovankaardal43990]

I managed to get a great deal on a 5C collet chuck with an integrated L0 backplate on eBay a little while back. I've been out of touch with any kind of metal spinning for quite a while, but I recalled Crawford being a solid name, so I grabbed the chuck even though I don't have much in the way of 5C tooling.

Of course the reason the chuck was going for such a low price won't be a surprise to anyone but me – Crawford TruGrip 5C collets are very different from standard 5C collets. They thread is much more course, and it's also going in the opposite direction.

Taking the chuck apart though, the threaded draw 'ring' is easily removable, and replacing it with one that fits standard 5C collets would convert it perfectly. What I'm wondering is if anyone has done this, or if anyone knows if there's somewhere that sells a right-handed, 5C threaded draw 'ring' for these chucks?

I have run across someones facebook page where they made a pair of these and they worked exactly as expected. I'd rather buy one – or have one made if anyone wants to recommend a place to get it done – then try it myself at this stage. My lathe is new to me and is slowly being rebuilt, and I can furnish other excuses to cover up for the fact I'm a big 'ole chicken when it comes to threading anything that is even a little unusual.

Any help would definitely be appreciated!

Pics of the drawbar 'ring'

And the chuck disassembled

[Donovan KaardalParticipant @donovankaardal43990]

[BazParticipant @baz89810]

Easy enough to do, I converted mine to 5c, only drawback really is that you undo the chuck to do it up, the trugrip collets being left hand thread and 5c being right handed.

[colin hamiltonParticipant @colinhamilton16803]

Baz, what thread is the 5c collet?

[BazParticipant @baz89810]

From memory it’s 1.238 diameter by 20 tpi.

[colin hamiltonParticipant @colinhamilton16803]

Thanks for the info

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