bronze vs. brass for bushings ect.?????

[vicegrip]

i buy oil impregnated bronze from mcmaster and turn it myself...for heavy duty stuff, i use marine bronze (shaft material).

If you want to stock-up....the above is tops.
BUT
That's only half the equation.
At least as important is the very-best surface-finnish quallity,
you can possibly muster, on your shaft.
Perfect roundness....and preferably a burnished finnish.

Poor-man equivalent....would be 1000 gritt emery
completely worn-out and run for some-time dry.
very little axial movement of emery, and low pressure.

The waste shaft-material imbeded in the paper
burnishes the shaft surface.

vg

[vicegrip]

Ejector-pin cut-offs....
from a mold-shop are about as good as you can get for
making a shaft out of.

They are nominaly about .0007" undersize, so your properly installed
press-fit bushings will come out just right.

[2talltary]

Delrin is a good alternative. It is self lubricating and a great machinable plastic. It's durable and will last long. It's mainly used to make gears and grinders. I found a page with more info and spec sheets.

http://www.iplasticsupply.com/materi...alux-sheet-rod

[SidecarFlip]

Being the cheap and frugal person I am, I tend to rebush rather than replace and 660CA High shock Bronze is my material of choice. Everything from backhoe pin bushings to fan motor bearings and a fast helix grease grove and alemite fittings tapped in, never hurts either.

Cored bronze rounds are pretty inexpensive.

[brucer]

Ejector-pin cut-offs....
from a mold-shop are about as good as you can get for
making a shaft out of.

They are nominaly about .0007" undersize, so your properly installed
press-fit bushings will come out just right.

return pin cutoffs would be slightly undersized also, but not designated as undersized.. and will be larger than ejector pins, ej pins are usually fairly small, like 1/8, 3/16,1/4,5/16,3/8.. return pins on the tooling i usually build are usually like 3/4 or 1inch and 1 1/4..

if a tool shop rebuilds dies and molds which most will..you could probably get some old used guide pins and cut the bad end off.. guide pins are hard though, would take a good chop saw for sure..