This is actually a good saftey reminder to bring up occasionally.
You can make your own bendng dies fairly easy,there are various designs out on the web and the members here probably have quite a few too.
Don't use anything that might be cast iron in the press for bending or pressing especially vee-blocks.Cast parts can explode when loaded down.
Always use a caliper to verify shaft diameter and bearing bore diameter before assembling(more on this later)
Always make sure the parts being pressed are centered under the ram and square to the press bed.
I had a friend who was a mechanic.He died when a piece of shrapnell from a bearing race that exploded went through his heart.The auto parts store sold him the wrong bearing for his year model axle and the fit was too tight.When he tried to press it on the bearing exploded.It was only a 20 ton press,but bearing steel is very brittle.Always check the fit before pressing.
A good idea when pressing bearings is to have a piece of lexan or plexi-glass sheild between you and the part just in case.If all else fails a piece of heavy cloth or a shop rag wrapped around the part is better than nothing.
I just need one more tool,just one!