Thank you. It appears you can't use the twist lock type of outlets with that type of plug or can you?
No, I have the same plugs on several 240V tools and have never had an issue with the plug coming out during use.
No. If you want twist locks you'll have to replace that connector. I put twist locks on all my 220V tools. Mainly because I only have two outlets. Each outlet is equipped with a 10' extension cord that I made with twist locks on each end. These reach any tool that needs power and the lock makes sure they stay fully connected. My circuits are rated for 30 amps because I have some 20A tools where 15A plug/receptacles would not work. Since they all share the same power cord, had to go with the heaviest. My next shop will have enough appropriately sized outlets to dedicate to each machine.
Why did you go with 30A circuits when it appears 20A would be sufficient? I ask because I'm making that decision myself and although I don't plan on any tools requiring a 30A circuit, a larger bandsaw will require 20A. I've gone back and forth on this. My electrician friend will help me do either one, but by all accounts 20A would be sufficient for me, as I won't be running anything other than a 110v dust collector and one of the larger tools at the same time, and no 220v tools simultaneously.