I've got a length of plastic drainage pipe which works with 1 1/8" crown races, and with a joiner for the drainage pipe on the end it's the perfect size for 1 1/2" crown races. I've never had any issues getting crown races seated properly with it. Much as I like having the proper tools, the drainage pipe has proved itself up to being used in my hydraulic press to seat really reluctant crown races.
But 1" copper pipe is never going to work as it's not big enough- it needs to go round the steerer tube, and the fork crown, which is always going to be more than 1" in diameter.
I've got a length of plastic drainage pipe which works with 1 1/8" crown races, and with a joiner for the drainage pipe on the end it's the perfect size for 1 1/2" crown races. I've never had any issues getting crown races seated properly with it. Much as I like having the proper tools, the drainage pipe has proved itself up to being used in my hydraulic press to seat really reluctant crown races.
But 1" copper pipe is never going to work as it's not big enough- it needs to go round the steerer tube, and the fork crown, which is always going to be more than 1" in diameter.