Thanks for the advice. Really appreciate it.
When you say I'll need good vacuum with a straight flute, do you mean to collect dust or to hold work piece down?
At the moment I've got a just about workable dust shoe around it with a vac sucking everything close to the spindle.. Not great yet version 2 should be coming to fruition soon. As for holding down the workpiece, it has 8 x M6 screws through it holding it to the aluminium underneath.
Also there's an airline blowing air at the minute too but not sure if that's helpful on this task.


Ideally I'd like to get it done tomorrow when the straight cutters arrive if possible but will have a look for some spiral up cutters now too.


On HSMAdvisor, I can't seem to set the straight flute type cutter so am unsure of how to set it correctly. However, when setting it with a 6.35mm 2 fluter HSS cutter at 4mm DOC, It's suggesting 22,000RPM and 2860mm/min feed*. This is suggesting that the power will be 0.62HP (would that be ok for my 0.8W spindle?) and 158% tool life..


Toolstation router bit - http://www.toolstation.com/shop/Powe...mperial/p38758


Are these numbers more like what you would suggest?


*2860mm/min is my rapid jog speed - so I assume this is max feed rate I can do. (Seems a little slow but presumably not something I can improve upon without a complete mechanical redesign?)