Lathe Indexing Attachment

[AdeV]

I don't hate all shapers, only the ones made the wrong way.
This is the way they should be made 

How come you can see the floor? Must have taken weeks to clean up around that thing, just for the photo...

[John Stevenson]

Photo took whilst being installed. 

[AdeV]

I'm guessing you can only see the top of it now? ;)

[HS93]

Cheers Lads  


Gerhard and Jason ,,,,, The  swan neck (some bird anyway ) tool is a very old idea ,, i first laid eyes on one in an old tool catalogue , along with a few other lathe tool ideas that have been long forgotten ,some i will have to try out , , What it dose is  eliminate tool chatter  , as you can see in the photos ,, thats 1/8 deep in stainless and just the ruffing cut . no sign of any chatter  ,, the tool dose this by raising the centre of the bend radius , so when its under load the tool is deflected away from the work and not into the work as with a normal tool ,, with a normal tool under cutting load it will be deflected into the work , taking more off the work and setting up vibration ,, CHATTER   ,, The tool holder needs to be made from a  tool steel , mild steel will not do as it will have no spring to it .
Another good thing it the tool uses old worn out milling cutters as the cutter bit    ,, well worth an hour or so to make one .

Also a good tool for the shaper . as John (i hate shapers) has just said  

A few ideas    ,, old catalogue dose not scan to well  


Rob

Edit .. ye oldie  original tool ,, were a forging , not cut from solid as  i have done  ,,, a forged tool  were the grain of the steel follows the bend would be a better job .




 

As I have been told I am a bit thick, is this a simmilar idea of toll it looks to easy so is it any good

thanks

Peter

[Rob.Wilson]

Hi Peter   

It is a copy of an old tool and yes its the mutts nuts 

I got a chance to do a bit in the shop today ,,,, first off was to replace the gears i bust    ,, John S kindly sent me a very well made set of gears 

Cheers John 

I finished cutting the worm without any miss hap  ,, this is were it will be going ,


Here it is up against the myford lead screw , for size


Then the outer bearing end was turned

Then the shaft was removed from the lathe and the carrier fitted the the outer bearing end ,, fitting a bit split copper pipe to the just turned end ,, the copper pipe stops the carrier from marking the job .


Then the shaft was ruffed to size


Then finish turned and screw cut ,, 1/2  16TPI and 3/8  20TPI


job done



Cheers Rob

[doubleboost]

Even the swarf has a good finish

[Rob.Wilson]

  cheers John 

[Bogstandard]

Very nicely done Rob.

Are you going to drive it electronically, or are you keeping it manual?


John

[Rob.Wilson]

Thanks John


I have made index plates ,so i will keep it manual ,,, i did see in the link you posted on your division master thread that they had a division master fitted to the attachment i am making  


Rob

[NickG]

Impressive workmanship there rob 

[Gerhard Olivier]

Beautiful work ROB

Gerhard

[HS93]

Cheers Lads  


Gerhard and Jason ,,,,, The  swan neck (some bird anyway ) tool is a very old idea ,, i first laid eyes on one in an old tool catalogue , along with a few other lathe tool ideas that have been long forgotten ,some i will have to try out , , What it dose is  eliminate tool chatter  , as you can see in the photos ,, thats 1/8 deep in stainless and just the ruffing cut . no sign of any chatter  ,, the tool dose this by raising the centre of the bend radius , so when its under load the tool is deflected away from the work and not into the work as with a normal tool ,, with a normal tool under cutting load it will be deflected into the work , taking more off the work and setting up vibration ,, CHATTER   ,, The tool holder needs to be made from a  tool steel , mild steel will not do as it will have no spring to it .
Another good thing it the tool uses old worn out milling cutters as the cutter bit    ,, well worth an hour or so to make one .

Also a good tool for the shaper . as John (i hate shapers) has just said  

A few ideas    ,, old catalogue dose not scan to well  


Rob

Edit .. ye oldie  original tool ,, were a forging , not cut from solid as  i have done  ,,, a forged tool  were the grain of the steel follows the bend would be a better job .




 

As I have been told I am a bit thick, is this a simmilar idea of tool it looks to easy so is it any good

thanks

Peter

Sorry i forgot to put the link on

[Rob.Wilson]

Hi Peter

Yes there is nothing new there ,, tangential tool bit holders are as old as tea     ,not the same as a swan necked tool holder , very top of the scanned page is one shown ,, comes in a range of sizes , and takes square or round tool steel ,  The date on the George Adams tool catalogue is 1928 ,,, i have earlier references to both tools  . As with most things ,with engineering processes/tooling get forgotten about ,,, then brought back as the latest  thing  as if has just been invented 


Rob   

[arnoldb]

Brilliant job Rob - Really an impressive bit of engineering! 

 , Arnold

[Rob.Wilson]

Hi Lads

Well this project has been sitting in the draw for a wile 

So today a finished up the division plates .


And machined up the bearing blocks .

set up for machining the bearing on the lathe faceplate .






and they go together something like this 




Cheers Rob

[Stilldrillin]

Another collection of metal magic! 

Glad yer back's improved Rob...... 

David D

[Dean W]

Glad to see this one back at the top of the page, Rob!

[Miner]

Rob,
As per your usual standards, Another great project. I've got the Radford book so I pretty well know where this is going.
Not to throw your thread off topic, But here's a question I've been meaning to ask. Your standard tool finish is far above anything I've been able to obtain consistently. So what's the secret? Coolant, Metal grade and type, Carbide selection when not using HSS, Voodoo, Praying to the machinist gods? A Myford is a good lathe, But there not close to the rigidity you would get from a larger heavy duty commercial type lathe. Yet it seems your normal finish is comparable to what those heavy duty lathes can produce.

Pete

[Rob.Wilson]

Thanks Dave  ,,,,,,,,,,,,,, back still giving me gip ,,,,,,,,,,,,, could some one please take the doll of Mr JS 

Cheers Dean ,,,,,,,,, glad to see you look in 


Hi Pete ,,,,,,,,, can i say  VOODOO     ,,,,,,,,Coolant ,, yes i use coolant ,,, what ever kind i have just bummed ,, never bought any for years and years .

Metal grade ,,,,,,,,,,,,,, mmmmmmmmmm well your guess is as good as mine    just one of three draws of mystery bar ends (retirement stock)


As to carbide tips ,,,,,, what ever are the cheapest ,,,,,,,,, i am not big on having loads of different grades of  tips , no point when you have no idea what exactly your machining ,,,,,, threw out the FEEDS/SPEEDS chart for the same reason .

As to the Myford its a surprisingly rigid machine .


I get just as good a finish with the Lorch Which is a very light watch makers lathe .


So i would say , a well set up machine , rigid work holding and very sharp tooling , adjust feeds and feeds for best results 

Probably not the most helpful answer     ,,,,,,,,,,,, should have stuck with voodoo 


Rob 

 
 
 

[HS93]

yes but this is what He uses for cutting Fluid.. 

                        Peter 

[Miner]

Well I guess we'll just go with the Voodoo and that the physics of machining metal are somehow just slightly different in your shop. You do need to give each one of your machine tools a pat on the bearings for me. Their doing a hell of a job.

I've got a somewhat interesting link and further story I'll email you.

Pete

[Rob.Wilson]

yes but this is what He uses for cutting Fluid.. 

                        Peter 

  Peter ,,,,,,,,,,,,,,, thats a very special lubricant 

Well I guess we'll just go with the Voodoo and that the physics of machining metal are somehow just slightly different in your shop. You do need to give each one of your machine tools a pat on the bearings for me. Their doing a hell of a job.

I've got a somewhat interesting link and further story I'll email you.

Pete

Pete ,,,,,,,,,,,,,,  not different physics ,,,,,,,, its just by the time you go through looking up all the different tool geometery , feeds speeds and all the rest of the bumf  for a one off ,you could have had 3 other jobs done , so i just grinned the tool by eye and set the machine to suit,,, hard to explain really as no two jobs are the same .

Yes in production ,, with 5000 parts in Material X ,, you would want optimal tooling to match X , feeds speeds , correct cutting fluids  for X  ect

Rob       

[AdeV]

yes but this is what He uses for cutting Fluid.. 

                        Peter 

I think you'll find that's for lubricating the machinist. This is my lubricant:



It worksh mosht effifififsh efisiisi eggsegglge well. Hic. The best thing is, the more I lubricate, the straighter the cuts seem to be...

[John Stevenson]

Now this really impressed me no end




Screw cutting a square thread. 

John S.

[Rob.Wilson]

  Hi Ade 

Well i will let you all into the secret ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,I have a special filter fitted to my camera lens,,,, P# 7302beergoggle.

Makes everything look  &^%$  mint       works on worlass 


  hi John ,,,,,,,,,,,,,that me being lazy 


Rob