johnnycnc
Member
Here are some bushings I made on cnc equipment
where I work.
We had a little slow spell a while back,
so I kept myself busy!I thought I'd share the idea,
as these could be made on manual metalworking tools
that some of you have.
I started using the larger stepped
bushings for various kits to place between 60deg. centers
to finish cut,an idea from here on IAP.
Roundness was improved,but still not enough to suit me.
On the purchased bushings,the part that slips in the tube was typically.002-.004 (thousandths)smaller than the tube i.d.,
and the sizing portion did not always seem concentric.
Also,the round,sharp cornered through hole was not kind to my centers.
The slim or "7mm" style are like nothing I've seen before.
They all have a machined 60deg countersink to mate up
with dead and live centers.
No through holes,these are not
designed for mandrel use.
Also the 7mm style would lose the part that goes in the tube if it had a thru hole.
I have also made a set of delrin finishing bushings for each
set,no CA or sealer will stick much.
With the delrin bushings between centers,no run-out and no
sanding thru high spots on CA finishes.
Roundness is now a non-issue and with the longer section
to slip inside the tube,and the perfect mate of 60deg.angles,
these are very solid to use.
I have a set of steel and delrin for all the kits I use
made up,15+ varieties or so.
If you made it thru all that hot air,sorry,here are the pics!
MODIFIED SLIM
MODIFIED-SLIM-END VIEW
MOUNTED ON BUSHINGS
MOUNTED ON LATHE
MODIFIED SLIM AND GENT FOR COMPARISON
Thanks for looking,comments or questions welcome.
where I work.
We had a little slow spell a while back,
so I kept myself busy!I thought I'd share the idea,
as these could be made on manual metalworking tools
that some of you have.
I started using the larger stepped
bushings for various kits to place between 60deg. centers
to finish cut,an idea from here on IAP.
Roundness was improved,but still not enough to suit me.
On the purchased bushings,the part that slips in the tube was typically.002-.004 (thousandths)smaller than the tube i.d.,
and the sizing portion did not always seem concentric.
Also,the round,sharp cornered through hole was not kind to my centers.
The slim or "7mm" style are like nothing I've seen before.
They all have a machined 60deg countersink to mate up
with dead and live centers.
No through holes,these are not
designed for mandrel use.
Also the 7mm style would lose the part that goes in the tube if it had a thru hole.
I have also made a set of delrin finishing bushings for each
set,no CA or sealer will stick much.
With the delrin bushings between centers,no run-out and no
sanding thru high spots on CA finishes.
Roundness is now a non-issue and with the longer section
to slip inside the tube,and the perfect mate of 60deg.angles,
these are very solid to use.
I have a set of steel and delrin for all the kits I use
made up,15+ varieties or so.
If you made it thru all that hot air,sorry,here are the pics!
MODIFIED SLIM
MODIFIED-SLIM-END VIEW
MOUNTED ON BUSHINGS
MOUNTED ON LATHE
MODIFIED SLIM AND GENT FOR COMPARISON
Thanks for looking,comments or questions welcome.
