[TheForge] Bronze Bushings

[John Newman]

Look under classes of fit in Machinerys handbook.  What you want is a running
fit,  any bronze bushings I have used are a few thou oversize on the outside so
that they are a press fit.  Unfortunately this can make the i.d. undersize so it
will have to be reamed.

John Newman

Rick at Rafter Lazy C wrote:

> Andy -
>
>     Intended capacities?  Good question.  The rolls will be 4in wide if they
> don't undergo any revisions, but I am still designing and have not done any
> testing as of yet.  Would like to be able to do 1x4 HRFB or maybe even 2x2
> HR bar.  Small material should be able to get to a 4 inch ID (3.5 in OD top
> roll).  Will keep you informed as the fab and testing phases come up if you
> wish.
>     I went looking for a roller and what I found on the market wasn't up to
> my idea of what a dollar is worth.  As far as the shafts being perfectly in
> line with each other, I am letting the bottom roll ASSEMBLY find it's own
> center and thereby align itself.  (as long as I get both sides of IT
> straight.)
>     This roller should be available to the public within a few months if all
> goes well.  I want to be able to sell it for under a thousand dollars.  This
> should be a serious roller for a small shop.  No motor involved, this is
> simply leverage applied in the right places to make the work easier.  I have
> been in metal fabricating for over 30 years and have run rollers of all
> sizes.  This should be a good one for the size of it.
>
> Rick
>
> PS - I looked all through the Machinery's handbook and couldn't find
> anything specifying what type of fit should be used for a bronze bearing of
> any size.  I have the 20'th edition here and the 25'th at work, and no luck
> either place.  Went in early today and dug out my boss'es Marks handbook (25
> years or so old) and couldn't find anything in it either.  Just because I
> can't find it doesn't mean it isn't there, but ...
>