The main problem with hand tapping is to go in straight...a difficulty that seems to increase in proportion to the tap size.
My trick is to chuck the tap in a drill press, remove the drive belt, then square the part in my drill press vise. Then turn the spindle or chuck by hand while applying downward pressure with the spindle feed, just until I get 2 or 3 shallow threads started. Then I can use the tap handle and finish threading by hand.
You cannot chuck up a M22 tap in a 1/2 inch drill press, but you could do the same trick with a small lathe ( if you have a lathe and do not know how to cut a thread).
Not having a lathe, you will have to fabricate a jig or fixture to hold a M22 tap true to the bore of the part you are trying to thread.
1963 Atlas (Original Owner)
The Second Law (of thermodynamics) rules.