? about using a radius cutter.

[Rob G]

Okay, sometimes I can be a little dense.:laughing:


After talking with the resident old toolmaker at work, I'm want to make sure my understanding of what he told me is correct.

Please look at the following paint drawings.

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/radius%20cutter/radcutterdrawing.jpg

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/radius%20cutter/radcutterdrawing2.jpg


I threw this together yesterday. Hopefully, I am going to be redoing my ring roller soon and want to make the tube dies for it.

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/radius%20cutter/radiuscutter1Medium.jpg

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/radius%20cutter/radiuscutter3Medium.jpg

This is the first test with a piece of .750" stock.

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/radius%20cutter/radiuscutterMedium.jpg

[trkklr77]

if your radious is to be .500"
your tool stick out need to measured from the center line of the pivoting mount.
ie: if your stick out is .500 your diam will be 1.0" + diam of the pivoting mount = 1.50"

[77fixer]

I think you should be including half the diameter of your pivot in your measurement, since that measurement plus the stickout of your cutter would be the radius you are trying to cut.

Brett

[Rob G]

if your radious is to be .500"
your tool stick out need to measured from the center line of the pivoting mount.
ie: if your stick out is .500 your diam will be 1.0" + diam of the pivoting mount = 1.50"

I think you should be including half the diameter of your pivot in your measurement, since that measurement plus the stickout of your cutter would be the radius you are trying to cut.

Brett


:homer: I forgot about that. (see what I mean about being dense sometimes.) Yep, you are both right.

Thank you.

[dopeassjackson]

if your radious is to be .500"
your tool stick out need to measured from the center line of the pivoting mount.
ie: if your stick out is .500 your diam will be 1.0" + diam of the pivoting mount = 1.50"

that damn center line is a POB. if you make your vertical rod a standard thickness (.50) or somthing easy it will make you life easier. that tool looks like it cut that piece of round stock preaty nice. how long did it take?

more info on how you made the tool. the bearing or what not would be nice.

i have been thinking about making a tool like that for various things.

[Rob G]

that damn center line is a POB. if you make your vertical rod a standard thickness (.50) or somthing easy it will make you life easier. that tool looks like it cut that piece of round stock preaty nice. how long did it take?


Don't know exactly how long it took, maybe 10 minutes. I was going slow and only taking about 10-15 thou. each pass. Didn't want to push it to hard because I have not used a radius cutter before and it's only a 9 x18? lathe, that is getting pretty tired.

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/radius%20cutter/radiuscutter6Medium.jpg

[trkklr77]

pob?

[dopeassjackson]

Don't know exactly how long it took, maybe 10 minutes. I was going slow and only taking about 10-15 thou. each pass. Didn't want to push it to hard because I have not used a radius cutter before and it's only a 9 x18? lathe, that is getting pretty tired.

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/radius%20cutter/radiuscutter6Medium.jpg

so you just basicly have two collars with an ID a tad bigger then the bolt you used? sounds simple enough to make. you didnt get any chatter or any thing?

[Rob G]

so you just basicly have two collars with an ID a tad bigger then the bolt you used? sounds simple enough to make. you didnt get any chatter or any thing?


Sorry about the crappy pic, it looked better last night for some reason. To answer your question, no, there are bronze bushings inside of the pieces of tubing. They are sized at 1.00 o.d x .750 i.d x .750 long.

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/bushingMedium.jpg

[dopeassjackson]

Sorry about the crappy pic, it looked better last night for some reason. To answer your question, no, there are bronze bushings inside of the pieces of tubing. They are sized at 1.00 o.d x .750 i.d x .750 long.

http://i159.photobucket.com/albums/t150/robg_010/mini%20break/bushingMedium.jpg

i see the bronze bushing at the top with the collar. is there a bushing in the bottom one as well? O damn that pic im quoting didnt show up until i posted. looks like a nice tool, lets see some more meterial it cut.

[SHERPA]

let us know how easy it works for you. I bought a radius cutter about a year ago and haven't chucked it up yet to mess with.

I would think it be easiest to mark out your "rough-cut" just using a cutter
in the tool holder using the cross feed and longitude feeds to make the
majority of your material removal. use a simple guage (or short piece of tube)
for where you need to continue to cut.

then when you get close, change over to the radius cutter and go slow.

just my idea.

seriously curious to know how it works for you...

--Sherpa

[lumberjack1986]

pob?

Point of Bearing/Base?

A reference point I'm guessing?

[SHERPA]

any more info about how this thing worked for you?

--Sherpa

[Rob G]

any more info about how this thing worked for you?

--Sherpa


Not yet.

I think I have finally scrounged up all of the material,parts and pieces to redo the ring roller, it`s just a matter of finding the time to do it. Hopefully it will be in the next week or two. When it comes time to start cutting the dies, I will take pics and video of the cutter in action.