Author Topic: Lathe Indexing Attachment (Read 84957 times)

Rob.Wilson · « **on:** January 11, 2010, 04:30:59 PM »

Hi All

Well i have started on a new project over the weekend ,more tooling

, an indexing attachment for the Myford lathe. The indexing atachment was designed by J.A.Radford and i am working from his artical in Model Engineer 5 Jan 1968 (great year)

.
I thought i would get the worst job out the way first ,the Index plates ,all those holes . I started with some 10mm plate .

Then i turned up a mandrel ,to mount all four the plates to turn the O/D

Then each plate was mounted and the edges chamferd

The original design call's for a set of 4 plates 7 set of holes on each, just short of 1500 holes , FAR FAR TO MANY HOLES, so after some thought ,i decided to cut the number of plates to 2 with 9 sets of holes and only 525 holes , i wil not be able to index 73,119 173 and other daft numbers , i can live with that.
On the other end of the mandral i turned up an expanding mandral to hold the plates for drilling.

The other side ,lots of deburing to do

Still some numbers to stamp on the plates

Cheers Rob

sbwhart · « **Reply #1 on:** January 11, 2010, 04:42:25 PM »

Great start Rob:- Looking forward to following this project, thanks for showing.

Have fun

Stew

Darren · « **Reply #2 on:** January 11, 2010, 04:46:35 PM »

I'm expecting that we are going to see another stunning bit of work here

Brass_Machine · « **Reply #3 on:** January 11, 2010, 08:55:58 PM »

That's some nice work so far Rob! I will be watching this one.

Eric

Gerhard Olivier · « **Reply #4 on:** January 12, 2010, 04:13:03 AM »

Good start Rob

Will be watching

Gerhard

spuddevans · « **Reply #5 on:** January 12, 2010, 06:43:29 AM »

That'a a good start made there Rob

Tim

Bernd · « **Reply #6 on:** January 12, 2010, 08:54:22 AM »

Rob,

Very ingenious using a hex cut to make it easier to hold the plates while doing work on one side. Excellent set of how to photo's also. This looks like it's going to be another exciting work of art.

Bernd

Rob.Wilson · « **Reply #7 on:** January 12, 2010, 12:17:23 PM »

CHEERS LADS ,

I had to use this method of work holding as you see in the photo's i had to drill and counter bore three holes for mounting the plates on the index attachment close to the bore ,and the plates are to large to hold on the O/D, also there would have been problems drilling all the holes and not hitting the chuck jaws .
close up showing under cut

60 deg tapper i used a large centre

M8 counter sunk socket cap , head turned to 60 deg , the origanal 90 deg dose not work as good

And next my quick exspanding mandral,, chuck lump of what ever you have to hand ,as long as it has large O/D than the bore of the job.
turn to size ,and give it some under cut , the one in the photos is one i had lying about .drill and USE A TAPPER TAP ,DO NOT TAP ALL THE WAY, just about the depth show in the photo.The reson for this is so you have tapperd threads

next using a saw cut 2 slots , leave in chuck. cleen of rag from sawing

screw in your screw

just to show what happens as the screw is screwed in

This holder was used for another job,, but still handy for other jobs .

O/D and face tuned

Thanks Rob

Stilldrillin · « **Reply #8 on:** January 12, 2010, 12:36:25 PM »

All very neatly done Rob!

David D

sbwhart · « **Reply #9 on:** January 12, 2010, 03:44:02 PM »

A neat tip their Rob

Thanks for sharing

Stew

Powder Keg · « **Reply #10 on:** January 12, 2010, 07:08:56 PM »

Looking good

BobWarfield · « **Reply #11 on:** January 12, 2010, 08:47:14 PM »

Excellent project, and a very nice photo essay.

Thanks!

BW

NickG · « **Reply #12 on:** January 13, 2010, 05:44:34 AM »

Thanks for that Rob, great start on the plates, wow that is a lot of holes! Did you face the plates on the myford and turn them on something else? Was the somethign else a boxford? Can't quite make it out.

Nick

Rob.Wilson · « **Reply #13 on:** January 13, 2010, 12:41:42 PM »

Cheers Lads

Bob , thanks,, its best that i use lots of photos as i am no wordsmith

Hi Nick , you were spot on , I did face and bore the plates on the Myford, Then i turned up the mandral on the Boxford ,as i had an M16 nut to hand so i needed to screw cut an M16 thread .The Boxford is a metric lathe .

Thanks Rob

Powder Keg · « **Reply #14 on:** January 13, 2010, 11:19:02 PM »

I like those arbors. I'll have to remember that little trick:o) Thanks.

NickG · « **Reply #15 on:** January 14, 2010, 03:46:12 AM »

Ah, makes perfect sense now! Good work.

Dean W · « **Reply #16 on:** January 15, 2010, 03:10:24 AM »

Nice setup with the arbors, Rob. Thanks for sharing that.
Tell us, for those who have gone through the bumpity bump of cutting the corners off odd shapes to make round shapes, what are the diameter of your plates, and how fast did you turn the lathe spindle? This is one of my least favorite things, and am happy to hear how others do it.

Thanks for the photo essay. Nice to be able to see what you're doing there!

Dean

Rob.Wilson · « **Reply #17 on:** January 15, 2010, 04:51:16 PM »

Thanks Dean

Yep i hate doing the bumpity bump turnning too , the plates are 6" diameter , i turned them at 1000 rpm with a heavy feed ,to ruff them to size,i was in a hurry , chips flying every were ,LOL
I wor a full face shield ,sweat shirt and still managed to get a few hot bits stuck to my neck

Cheers Rob

Artie · « **Reply #18 on:** January 15, 2010, 06:31:56 PM »

Great job mate. Bloody hell all that drilling looks tedious! Watching with interest...... btw, thanks for pointing this site out to me. Its fun...

Rob

Rob.Wilson · « **Reply #19 on:** January 16, 2010, 01:17:23 PM »

Hi Rob

pleased to see you made it here ,,

and a great bunch of lads

Regards Rob

Bernd · « **Reply #20 on:** January 16, 2010, 06:28:41 PM »

Quote from: Rob.Wilson on January 16, 2010, 01:17:23 PM

Hi Rob

pleased to see you made it here ,, and a great bunch of lads

Regards Rob

Artie?

Ok, what's going on.

Bernd

Rob.Wilson · « **Reply #21 on:** January 17, 2010, 04:09:49 PM »

Hi Bernd

Artie = Rob

Regards Rob = ME,,,,,,,,, Rob.Wilson

dsquire · « **Reply #22 on:** January 17, 2010, 08:17:36 PM »

Bernd

You have to pay close attention. You can't drink coffee

and read the newspaper while reading MadModder email. You miss ~~all~~ some of the details then you end up with a bunch of these

Cheers

Don

chuck foster · « **Reply #23 on:** January 17, 2010, 08:21:12 PM »

i don't get it

chuck

Bernd · « **Reply #24 on:** January 17, 2010, 09:07:19 PM »

Reply #19 says it all. I thought Rob was saying Hi to himself.

Ok, now I've done it. Gone way

for a Moderator. I'm supposed to set a good example.

Dam, gotta' lay of them Yuengling beers. Made with pure Pennsylvania crude.

www.yuengling.com/

P.S. Rob, please get us back on topic.

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Author Topic: Lathe Indexing Attachment (Read 84957 times)

Rob.Wilson

Rob.Wilson

Rob.Wilson

Rob.Wilson

Rob.Wilson

Rob.Wilson