Tangential tool holder

[Dells]

Does anyone use a tangential tool ?
Been reading up on tangential tool holders as everyone seems to be raving about them, so I decided to make one from an old holder I had that I was never going to use.
Basically it's just a graver in a tool holder in the tool post with diamond up, that's how I use a graver sometimes anyway and I must say I am very impressed , I think the holder or tool bit would benefit from a slight angle towards the headstock or if turning the other way towards the tailstock, so I would need both left and right but it's also possible to use round tool bits as well and by all accounts they give a mirror finish so that's the next project to make a holder to take round bits, a use for broken drill bits into the bargain.
I just drilled and tapped for a 3BA grub screw ( I already had some ) to lock the bit so it's easy to remove and re grind also easy to grind as it's only one face and I already made a jig to grind my gravers so I can use that.
Dell

 

[L. Vanice]

In the USA, we have a product called a drill blank. It is a rod of HSS available in about any diameter in which drill bits are made. Maybe the UK and other countries have a different name. Anyway, I use 1/8 and 3/16 inch drill blanks as hand gravers. I hold them in Starrett pin vises and sharpen the end at an angle. The surface finish they produce is affected by how you grind the end, of course. They make very good turning tools, just right for doing curved surfaces. The same tool would do well in your tangential holder.

Larry

 

[Dells]

In the USA, we have a product called a drill blank. It is a rod of HSS available in about any diameter in which drill bits are made. Maybe the UK and other countries have a different name. Anyway, I use 1/8 and 3/16 inch drill blanks as hand gravers. I hold them in Starrett pin vises and sharpen the end at an angle. The surface finish they produce is affected by how you grind the end, of course. They make very good turning tools, just right for doing curved surfaces. The same tool would do well in your tangential holder.

Larry

Over here it’s called drill rod but same thing , I made hardwood handles for my gravers some round and some diamond in sizes 3/32”, 1/8”, 1/4”, picture of a couple of them .
Dell

 

[karlmansson]

Does anyone use a tangential tool ?
Been reading up on tangential tool holders as everyone seems to be raving about them, so I decided to make one from an old holder I had that I was never going to use.
Basically it's just a graver in a tool holder in the tool post with diamond up, that's how I use a graver sometimes anyway and I must say I am very impressed , I think the holder or tool bit would benefit from a slight angle towards the headstock or if turning the other way towards the tailstock, so I would need both left and right but it's also possible to use round tool bits as well and by all accounts they give a mirror finish so that's the next project to make a holder to take round bits, a use for broken drill bits into the bargain.
I just drilled and tapped for a 3BA grub screw ( I already had some ) to lock the bit so it's easy to remove and re grind also easy to grind as it's only one face and I already made a jig to grind my gravers so I can use that.
Dell
View attachment 746886 View attachment 746887

I've been interested in one but I don't have one. How did you make yours? I see the set screw but how did you make the square? And is the set screw enough to hold the tool in place? I've seen some designs that have a clamp instead.

This one in particular came to mind: The Diamond Tool Holder

Regards
Karl

 

[L. Vanice]

Over here it’s called drill rod but same thing , I made hardwood handles for my gravers some round and some diamond in sizes 3/32”, 1/8”, 1/4”, picture of a couple of them .
Dell

In the USA, drill rod is annealed (soft) tool steel, W1, O1 etc. in drill sizes, but 3 feet long and centerless ground on the OD. It can be heat treated to make a tool but it is not high speed steel. W1 is plain high carbon water hardening steel similar to my antique steel gravers. O1 is oil hardening.

USA drill blanks are the same length as a jobber length drill bit of the same diameter, polished on the OD and made of hardened high speed steel, ready to sharpen and use.

I always suspect, if I am not sure, that there will be a difference in terminology between USA and UK. I seem to recall that our W1 drill rod is called silver steel in the UK.

Larry

 

[Dells]

I always suspect, if I am not sure, that there will be a difference in terminology between USA and UK. I seem to recall that our W1 drill rod is called silver steel in the UK.

Larry

Yes tool steel over here is called silver steel , I use it to make small screws amongst other stuff.
Dell

 

[Dells]

I've been interested in one but I don't have one. How did you make yours? I see the set screw but how did you make the square? And is the set screw enough to hold the tool in place? I've seen some designs that have a clamp instead.

This one in particular came to mind: The Diamond Tool Holder

Regards
Karl

I have not read anything about slippage, this one I made I filed the square but i have been looking at another options.


 

[wefalck]

This kind of toolholder seems to have been quite popular on larger lathes unti the introduction of carbide inserts. The tools are easy to grind/hone, as only the top-rake has to be worked on and the rest of the clearance angles come from the holder itself.

I have meant to make such holder for a long time to use broken drills etc. as grooving tools for cutting round-bottomed grooves. So far there has not been any urgent project-related need, so this remained in the 'ideas' box.

 

[Dells]

This kind of toolholder seems to have been quite popular on larger lathes unti the introduction of carbide inserts. The tools are easy to grind/hone, as only the top-rake has to be worked on and the rest of the clearance angles come from the holder itself.

I have meant to make such holder for a long time to use broken drills etc. as grooving tools for cutting round-bottomed grooves. So far there has not been any urgent project-related need, so this remained in the 'ideas' box.

I have been busy today making a better one , a bit of a headache after this 70 year olds head scratching working out how to setup the part in the mill to cut the 2 times 12 deg angles, one 12 deg bias to the left and the other 12 deg bias forward, got there in the end although I may put a slope on the front top, just have to make the clamp, drill and tap tomorrow .
Dell