Finishing Bushings

[jd99]

I was going to make some finishing bushings this afternoon, and this is what I came up with. Figured I'd make them out of delrin and they should be a universal type to be able to work with all the kits (unless there are kits out there with tubes bigger then 1/2")

Figured one center (double angle) and two end (single angle) bushings would be all I would need.
Any one got any suggestions or comments please fell free to let me know.

 

[Papo]

Very cool Danny.
I believe is Johnnycnc that also makes and sells these out of delrin.
I happen to drill out 2 pieces of 2"x3/4 round delrin rod yeaterday thinking about the same idea.Thanks for the layout I needed that.

 

[Justturnin]

I was going to try my hand at some Delrin Bushing and thaty PDF stressed me out......

 

[bitshird]

I turn the ends of mine down to .226 so they will just fit into a slimline tube, They don't last a long time since they wind up a bit under the mandrel size, but I like to be able to seal the ends of the wood as well.

 

[jd99]

I turn the ends of mine down to .226 so they will just fit into a slimline tube, They don't last a long time since they wind up a bit under the mandrel size, but I like to be able to seal the ends of the wood as well.

I got the size for the small end from my smallest bushing (the 7mm slim lines).

Additional note I just turned thes and the only thing I might change is the length maybe make the 1/2" dia. part shorter I didn't know how long my mandrel was when I made this drawing; and you can't get two tubes and the three bushings on the mandrel.

not sure how I would turn them with out the 1/2" dia being real short though I used 1/2" dia, delrin and held it in the 1/2" 5C collet on my metal lathe to turn them.

Most of the time I finish one tube at a time anyhow so it will work.

 

[Carl Fisher]

I like the concept of the tapered bushings. So much easier than having individual sets for all the different kit styles.

Very cool/

 

[glycerine]

That's exactly how I did it (tapered delrin) and they work great! I think my rod was around and inch in diameter...

 

[hrtndlr]

I use short pieces of brass tubes for finish bushings on slimline pens. I am able to seal the ends of the blank and not accidentally glue the bushing to my workpiece.

 

[ironman123]

I made mine from 1/2 inch diameter acetal with 60 degree pointed end to go inside tubes. One had a 1/4 inch dia. shaft 3/4 in long to go inside my mandrel holder and the other has a center drill hole in it for the tailstock.

They work but I decided to make another set from 3/4in. dia. acetal.

Ray

 

[Mack C.]

I was going to make some finishing bushings this afternoon, and this is what I came up with. Figured I'd make them out of delrin and they should be a universal type to be able to work with all the kits (unless there are kits out there with tubes bigger then 1/2")

Figured one center (double angle) and two end (single angle) bushings would be all I would need.

Any one got any suggestions or comments please fell free to let me know.

There's really no need for the 0.10 nub on the ends. Considering these go on an A mandrel, the bevel at the end will go inside whatever size tube you are using, or at least push up closely to a 7 mm tube.

 

[jd99]

I thought about taking them to a point, but then I thought the point would eventually break down because of lack of strength and I would have to make new ones more oftin, so i measured the smallest bushings and made the end a little smaller in dia then them.

That way there would be more bearing surface there then just the .010-.015" pushing against the brass tube, if I had cut then to a sharp point.

I figured out a way to mass produce these, (well not mass produce but make a lot fairly easy), and I might make some up and provide them to the IAP members if there is any interest, (at a little above cost) I think I'll just make the single angle though.


Thanks
Danny

I was going to make some finishing bushings this afternoon, and this is what I came up with. Figured I'd make them out of delrin and they should be a universal type to be able to work with all the kits (unless there are kits out there with tubes bigger then 1/2")

Figured one center (double angle) and two end (single angle) bushings would be all I would need.

Any one got any suggestions or comments please fell free to let me know.

There's really no need for the 0.10 nub on the ends. Considering these go on an A mandrel, the bevel at the end will go inside whatever size tube you are using, or at least push up closely to a 7 mm tube.

 

[keithbyrd]

I got a set of these from penturners products - they look just like your drawings!

 

[rherrell]

You don't need to go to all that trouble. Just put a point on some Delrin and use it as centers...

I have a revolving drill chuck in the tailstock.

 

[Constant Laubscher]

Agree with Rick.

 

[glycerine]

You don't need to go to all that trouble. Just put a point on some Delrin and use it as centers...

I have a revolving drill chuck in the tailstock.

That's a good idea, BUT, I find that it's much nicer and faster for two piece pens to be able to apply CA at the same time. And it doesn't take that much longer to drill a hole in the delrin so they fit on a mandrel...