Myford T Slot size and suitable cutter

[BinbagParticipant @binbag]

[BinbagParticipant @binbag]

Hello;

Can someone let me know out there what is the correct size of the myford T slot on the cross slide and vertical slide and also what is the correct cutter to use to replicate said T slots.

I want to make a cross slide attachment to take my vertical slide.

Thanks

Ralph

[John HaineParticipant @johnhaine32865]

http://www.rcgroups.com/forums/showthread.php?t=610014

60 seconds with google…

[BinbagParticipant @binbag]

And 61 seconds reveals 2 different sizes qouted in other articles. So what I am after is the correct and complete dimensions not just width.

Plus what is the suitable cutter.

[NJHParticipant @njh]

Hi Ralph

You might try here

I will measure my crossslide tomorrow

Regards

Norman

Edited By NJH on 17/04/2012 22:57:23

[MICHAEL WILLIAMSParticipant @michaelwilliams41215]

Width :

Basic slot 3/8 .

Lower slot 5/8 .

Height :

Upper slot 7/32 .

Lower slot 5/32 .

All in inches .

There never seems to have been any formal tolerance system but roughly speaking T slot is dimensioned for a loose fit on nominal size T bolt and T bolts themselves are made undersize .

Many detail variations can be found on actual measured dimensions of slots and bolts .

At least one lathe has been found with dimensions of slot which measure 10 – 16 – 6 – 4 mm

T slot dimensions originated from an available Woodruff cutter many years ago These cutters are still available from several sources – try Hemmingway , Tracy Tools and RDG .

[MICHAEL WILLIAMSParticipant @michaelwilliams41215]

Text editor stopped working last night when I was tidying up above post and then would not let me back to edit .

Corrections : Lower slot is actually specified as 9/16 inch min but in practice some are wider up to 5/8 inch.

All cutters ever seen cut a little wide anyway when new .

Suggest you take 9/16 inch as the proper working dimension .

All other information in above post seems to be correct .

[KWILParticipant @kwil]

Proper T Slot cutters have a cutting face, top and bottom as well as periphery. You can use woodruff key cutters ( I have, for Myford sized slots), very carefully. Try also Sussex Tools, if not a stock item they can obtain from UK manufacturers.

[S.D.L.Participant @s-d-l]

Posted by MICHAEL WILLIAMS on 17/04/2012 23:23:23:

Width :

Basic slot 3/8 .

Lower slot 5/8 .

Height :

Upper slot 7/32 .

Lower slot 5/32 .

All in inches .

That would make it 3/8 sloting cutter first then 5/8 * 5/32 Woodruff cutter

See Here

http://www.buckandhickman.com/find/category-is-CT+Cutting+Tools/category-is-CT03+Standard+Machine+andToolroom/category-is-CT0303+Milling/category-is-CT030306+Woodruff/product-is-026691

Steve Larner

[BinbagParticipant @binbag]

Excellent – thanks everone. I have ordered the cutter and will be making swarfe very soon.

Cheers

Ralph

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