I used 1/2" shaft a grinder and small piece of copper tube to keep it centered on the pump shaft. I usually use a 1/2" drill. on high pressure / high volume pumps, you can just about stall the drill, so you know when you have pressure.
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
