You could probably roll it around a mandrel like winding a spring. I think a simple roller on the toolpost would work to form the dtrip to the mandrel.

Things to consider"

Are you roiling it the easy way ao the hard way? If the hard way the material may try to twist.

Allow for spring back. The mandrel will have to be undersized.

You will be rolling a helix. Can you fet it flat enough afterwards?

Does your lathe have the balls to pull it off?

Cut the brass carefully to the right length for the finished diameter using rxpi (at 3.142) file edges nicely as this will help later…..place on hearth and heat using a 'brushy' flame…keep the flame moving until the piece is just glowing..ie not too bright or red……if the torch is small it's ok to start at one end and work to the other but keep it moving…..allow 'glow' to go and then cool under the tap…..

Find a suitable former for your diameter…ideally a little smaller than the finished diameter…..a lathe chuck can be good but always use several layers of gaffer tape to get to the exact diameter…this is both for exact sizing and also to protect the brass surface using just your FINGERS bend the brass round the former in one operation…use a hardwood block to get the ends to meet nicely, or use the clamping of a 'workmate'.

Carefully file the join using a flat file (I use a warding file0 until there is no light coming thru the join when you hold it closed…….silver solder. In all probability there will probably be some slight heat distortion so return the piece to the former for final pampering….If the walls twist use padded pliers to gently untwist so that a perfect fit onto former.

That sounds suspiciously like employing a filing rest as the other pair of rollers. I have never heard of it before but filing rests were popular at one time with clockmakers for putting squares on the ends of arbors and other sundrey tasks. It's not any great leap of imagination to repurpose a filing rest on a lathe into a light duty ring roller for clock bezels. Not sure I would be happy doing this with anything other than thin brass strip.

regards Martin

I once made a bezel for an old French mantle clock, about 150mm dia with bevelled glass set in. This was not an easy job and I would not try it again!

Cut 3/8 square brass to length, anneal, bend into ring and silver solder. Use oak former to make round. Set into grooved oak plank on faceplate, clean up front and back and use form tools to make nice rounded bezel shape. Cut groove for glass and clean up inside. Then silver solder on hinge and catch and re-true up and cut snap groove on inside rear. Then cut glass and bevel and polish.

This worked but was 'difficult', good luck with your bezel.