I have been doing some reading on Arbors in general and realise that my attempt was quite crude. I have since produced a better version of an arbor for holding the cutter.
With the constant interrupted cut I decided I had room to fit a M3 screw off-centre so I have also included this in the new arbor. It makes it look more cluttered but in terms of functionality, at least there is no chance of the cutter slipping.
Hi, I have just been reading some of your articles which are very interesting. I have a small suggestion for you, I hope it helps.
If you make another arbor I would suggest drilling the cutter retaining screw off centre in it as this will provide the required relief for your cutter. This would also allow you to make several cutters from the same blank by simply regrinding the tool and rotating it on the arbor. Finally, to help prevent the tool from rotating you need to provide a large washer on the side of the cutter away from the arbor.