[Tyler2517]

Its not very hard to open a pully up. Just something to make sure of though is that when you try to bore out a plastic pulley with a aluminum center it will generate a huge amount of heat if done wrong potently slipping the plastic around the metal. This could really hurt the operator. We ran in to some problems on our swerve; lost a boring head...

Also make sure the aluminum core has the room for a one inch bore.
In the end we went with a solid aluminum pulley for the steering.

The 1640 history with the development of there swerve is a great tool for this type of thing.

We could not find a cots pulley that was with in a reasonable price with the bore at 1"