Earlier Fantasy Machines were supplied with super-concentric tool holding Bushings - to hold the various grinding and polishing tools (commonly called "mandrels").  What we've learned is that "Out in the World" there are many such mandrels, from many different sources, typically sharing a lack of precision - in terms of dimension and concentricity - but usually inexpensive (and so popular).  We did offer a Collet type of holder as an optional accessory - it would handle oddball shank sizes.

The Collet Holders, come with a set of collets that handle a full range of shank sizes.  We've seen their popularity with Fantasy users - and so now we've decided to make them standard on new machines. 

So, if you are the owner of one of those earlier machines and wish to order the Collet, it continues to be available as an accessory.  Please note:  It is a good idea to have installation of the Collet done at the factory - permanently installed - replacing the tool-holding Bushings.  Factory installation assures maximum concentricity of the holding mechanism - spec'd and controlled in the assembly process to less than 40 microns center offset (random home assembly can often exceed that).

If you already have purchased the Collet as an add-on feature for an earlier unit, and you would like to have that factory installation performed, you can have it done for you at no added cost - other than the shipping cost for the Drive Motor and the Collet that would need to be sent to the factory.  Tell us that's what you want to do and we will send you and "RMA" (documentation to keep control of your items). 

Then, you will remove the Drive Motor by turning the lever (as you do when changing the position of the Drive Motor) and lift it off.  Separate the power connection.  Send the Motor and the Collet to Ultra Tec with a copy of the RMA - easy. 

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86.53 ct fine Bazilian Citrine