Lathe turning Pins out of a pin set

[AWLEAPHART]

Hello,
I'm using Pins out of a gage pin set for expanding Brass necks and was needing to know what type of Carbide insert will cut the pin just to taper the end on a lathe.
A Leaphart

 

[GenePoole]

Do you mean like a chamfer on the end? A 45° tool holder for a square bit would work. Like a SSDCN

https://www.google.com/search?q=ssdcn+tool+holder

 

[tac284]

Gage pins are somewhere around 60 Rockwell c so you would want to look for a CBN tipped insert for your favorite turning tool. Then use your compound to turn the taper. Good luck...

 

[Toolbreaker]

If you have several pins you want to turn, you might try ceramic. Several grades made for hard turning, and leaves a fantastic finish. They are fragile, though.

https://www.mscdirect.com/browse/tn...erts&navid=12107174#navid=12107174+4288184838

 

[ridgeway]

Carbide will cut fine...cemented or indexable carbide will work. Swing your compound to the angle and goto town. Same insert you would use for turning.

 

[Dusty Stevens]

Toolpost or surface grinder

 

[carlsbad]

Carbide will cut hardened steel but it is difficult to take a light cut without chatter. For what you describe, a 30 second operation with a tool post grinder would be the best. You could probably put the pin in a collet and spin it fast and hit it gently with a quality hand held rotary grinder. --Jerry

 

[AWLEAPHART]

Thanks everyone.
Does anyone use a grinder attachment in there tool post?
A Leaphart

 

[carlsbad]

https://www.dumoretools.com/tool-post-grinders

 

[butchlambert]

Thanks everyone.
Does anyone use a grinder attachment in there tool post?
A Leaphart

That is what my Dumore happens to do. It ain't for loan, trade, or sale.

 

[carlsbad]

Which Dumore do you use?

 

[butchlambert]

Which Dumore do you use?

Jerry,
Mine has a 1/2hp Marathon motor. I have not a clue on the mod. number.

 

[Steve morgan]

Hello,
I'm using Pins out of a gage pin set for expanding Brass necks and was needing to know what type of Carbide insert will cut the pin just to taper the end on a lathe.
A Leaphart

883 carbide , or borazon insert should do what you want. If you want something simple,Chuck the pin in a cordless drill and use a belt sander or a fine grit wheel on bench grinder.

 

[tobnpr]

Be sure to cover your ways whenever using an abrasive...

 

[Eddie Harren]

Be sure to cover your ways whenever using an abrasive...

You got that Butch? Listen up!

 

[Dusty Stevens]

I have a dumore and a KO lee thatll both do it. Wouldnt even think of trying to lathe cut one of those pins

 

[carlsbad]

I recently machined out a hardened bearing race for a neighbor--created a beautiful 5 gallon bucket full of indigo blue peacock swarf--but it took forever. --Jerry

 

[shortgrass]

I recently machined out a hardened bearing race for a neighbor--created a beautiful 5 gallon bucket full of indigo blue peacock swarf--but it took forever. --Jerry

The OP is trying to make a useable tool, you were just making scrap to get a worn out bearing race out of its pocket!

 

[carlsbad]

The OP is trying to make a useable tool, you were just making scrap to get a worn out bearing race out of its pocket!

Read above, I was the first to recommend grinding. --Jerry

 

[TRA]

Buy yourself a ceramic insert and keep it handy for times you need to turn hard metals. A good carbide would have done it, but ceramic rocks. Run it as fast as your lathe will turn and watch the cellophane thick chips fly.