Myford Taper Turning Atahment AGIAN

[Rob.Wilson]

HI All
Here we go agian,, A good friend has setup a site for me to store my photos and with the help of another who had saved a few of my photos that he sent back to me and the few i have left ,i will try agian .

I started with the main bracket for the TTA ,,this is a welded construction ,i would normally do a casting for something like this, but  for quickness i decided to just weld it up ,and i am pleased i did,,, as i had copyed a TTA for an ML7 and i have a S7 so the bracket has to be wider ,as the S7 has a longer cross slide . so i just had to weld up an exstention piece and stick it on.would have been a differant story if i had made a casting  
The bracket part befor welding showing weld prep

welded up


then the bracket was heated up in the furnace to stress reife it

the i machined it up square


an at this point i tried it against the lathe and relised my mistake ,,to short   so i welded up an exstention piece and welded that to the bracket




Regards Rob

[Rob.Wilson]

Next a made the guide,from a lenght of BMS bar that was also stress relived ,, i stress relive nearly all parts i make from BMS, as due to the cold rolling prosses there is allot of stress built up in the bar,, and if you machine more off one side than the other you remove the tention from that side and the stress thats left in the other side will pull the part bow shaped ,in the direction of the side with more material left on it,which is a real pian when you may have spent many hours machining up a part , say like a model engine crankshaft from solid , if you have a part the may bend due to this affect and un able to stress relive the part ,like a crankshaft ,, i would use HOT ROLLED BAR for the part,hope this may save some one waisted time and materals,,as it has caught me out a few times .





the guide was then set up on the R/T using a 2mt plug to locate it , using the plug to set the mill spindle on the same axis as the R/T , locking the y axis and zero in the dial on the x axis , Do not move Y axis,,


now with the R/T set to zero , this needs to be set to zero as the last operation is to engrave the scale,, place the guide bar on the plug , and clamp loosely ,now the guide needs to be clocked in along its lenght so its now parralel with the X axis


when  the DTI reads zero at both ends lock the guide to the R/T

Regards Rob

[dsquire]

Rob

Thanks for redoing this article on the Myford Taper Turning Attachment. I am sure that it will be well received and appreciated by many. Good work.

Cheers 

Don

[Bernd]

Rob,

Thank you very much for reposting. Glad some people had the forsight to save some of your pics. Wish I had.
One reason I'm so iterested in the thread is I want to add one to a Grizzly lathe I've started to modify. I have welding equipment to do the same.

Don't want to panic you, but one pic didn't show up. There's a little red x in the box. Check to make sure that you typed in the right wording. No biggie, if you need help just yell somebody will help.

Regards,
Bernd

[Rob.Wilson]

Thanks Don and Bernd

Bernd i have no idea why that photo will not show  i am seeking help on it thanks ,,, If you or anyone is interested i could do drawings for the TTA which could be adapted for most lathes .

With the guide now set up on the R/T the ends were milled and slots cut



the next job was to cut the degree scale ,this was done with an old endmill ground up to a 30 deg point ,just like a lathe threading tool ,making sure the piont was in the center of the tool, with the mill spindel locked , a 0.3mm cut put on and the mill table was advanced , using the R/T dial to get the correct spaces



then cleaned up with some 400 wet and dry


Regards Rob

[Bernd]

Rob,

Yes, definatly I would be interested in drawings. But take your time doing the taper attachment.

I do like the way you put those graduations on. Very ingenious. 

Bernd

[CrewCab]

Welcome back Rob, glad you've managed to resurrect this thread mate, it's very popular and a bloomin good read 

CC

[tinkerer]

You are doing a great job. I am anxiously awaiting to see how this is geared to drive the cross slide, if that is how this works.

[Brass_Machine]

I agree!. That is some fantastic work my friend.

Glad you are back.

Eric

[Rob.Wilson]

THANKS LADS ,,,,for your comments and interest


tinkerer ,your are correct , the cross slide lead screw is disconected ,so that it is free to move back and forth , when conected to the TTA by a link it follows the angle set on the guild.

next the slider was machined up from a lump of BMS ,, it was milled all over square ,then set in the four jaw chuck to machine a boss on one face, the the dovetail section was machine



then the corners were given a radius

then i case harden it , just to stop the guide and slide picking up as they slide across each other, both being of BMS,  the part was heat up and the placed into the case harderning powder ,re heated and placed back in the powder to cool

here it is black and crispy after cooling,,the reason for letting it cool was so i could spot face and drill the holes for the three M4 grub srews,this removes any case harderning in this area,so i can tap the threads after harderning,,,if i had just tapped the threads first they would not survive the heat treatmemt.

after re heating and quenching,now a grey color and with a very hard skin,and the threads tapped


Regards Rob

getting there

[sbwhart]

Very nice work ROB 

I like your thinking ahead with the case hardening and tapping the screws, Just how big are these parts that dove tail slide must be about 4" * 6" ?

Thanks fro showing

Stew

[Rob.Wilson]

Thanks Stew

the slidder part is about 3 1/2 X 2 1/2 X 1 1/4 ,,,,Note to self ,,must put some thing in shot for scale 


The next part to be made was the link that connects the lathe cross slide to the TTA
this was milled up from some flat stock to leave the center section high

then a slot and the hole for a t bolt to fix it to the cross slide


then i set it up on a angle plate to mill the tapperd section

set up on the R/T to have the ends milled ,




then it was finished off with a file to add a radus around the top edge

still a couple of holes to drill

Regards Rob

[Rob.Wilson]

Hi All

next out with the piant





then i made some of the smaller parts that join everything together





right were up to date now ,, tonight i hope to get some shop time and do a bit more

Regards Rob

[sbwhart]

Stunning Job Rob

 

Stew

[dsquire]

Rob

You have done a superb job of both machining and finishing the Myford Taper Turning Attachment as well as documenting it so that others may use it as an example when building their own. You have every right to be proud of this build and MadModder is a better forum because of it. Thanks again for re-posting this for all of us.
                              :ddb:

Cheers     

Don

[bogstandard]

Rob,

An absolutely stunning example of how a piece of tooling should be made.

There are times for a lash up job, and times like yours, where you are making a piece of tooling to last at least one lifetime, and maybe a lot longer.

Fantastic work, that we should all aspire to copy.


Bogs

[Bernd]

Rob,

What everybody else has said I'll double that.

I'm really glad you decided to repost this. Now all I need to do is get some of my smaller projects done so I can get back to my lathe rebuild.

Bernd

[Darren]

I'm truly impressed that that could be made at home to such a high standard ... 

[Stilldrillin]

Rob,

Thank you for re posting! 

Really admirable workmanship.....   

David D

[John Hill]

A very nice project and an excellent account of how you carried it out.

[CrewCab]

Good to have you back Rob, that's top class work mate  ........... thanks for posting.

CC

[Rob.Wilson]

Hi LADS

i would just like to say that i am over whelmed at all your comments,,  THANKS LADS

I still have a few parts to make , as i have man flue all a managed tonight was the indicator for the scale , i did cheat and used my small Denford CNC mill to cut the Polycarb
I am still learning CNC (slowly) and so far i have only done a few name plates and things on it ,simple 2D stuff ,,so i will have lots of questions for those members who have more experience using CNC
The mill
 
A few shots maching the  4 mm polycarb



then i set it up in the mill , using the same cutter i used to do the graduation ,i cut a groove in the plastic for the indicator mark,i just ran the cutter back and fourth a few times


then i filled the groove with a bit black paint

I still have a spacer to make to mount it to the main bracket

Thanks again Rob

[kvom]

Great job     -- makes me glad my lathe came with a TA already.

[DeereGuy]

Rob, just caught this post...I am in awh...just amazing work...

[Dean W]

Rob, glad to see this back up for all of us to have a look at.   I saw it a short while back, then couldn't find it.
Where did you get that delicious color for the ball handle and clamp?  Looks great!

Dean