Hi, I’ve had a look at my Warco 220 this morning, and it has a 125mm three jaw chuck, which is mounted on the six hole backplate with an adapter plate.
![CIMG3338](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
![CIMG3339](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
![CIMG3341](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
As you can see in the above photo, it’s difficult to remove the chuck, without removing the adapter plate from the six hole backplate first, as the socket head screws hit the backplate after a couple of threads.
![CIMG3342](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
The backplate has its own little niggle, as there is only just a little over 20mm between the three socket head screws and the headstock, and requires a cut down socket head key, which I keep with the machine.
![CIMG3346](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
Once the chuck with the adapter plate is removed, the six socket head screws that hold the backplate onto the spindle flange are revealed, and if you have the optional 8″ faceplate which was available for this machine, you need to remove these six screws to fit it in place of the backplate.
![CIMG3344](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
![CIMG3343](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
The register on the backplate is 80mm, as can be seen.
Regards Nick.