MadModder

Gallery, Projects and General => How do I?? => Topic started by: Gerhard Olivier on November 16, 2009, 03:22:14 PM

Title: Soft MT2 blank
Post by: Gerhard Olivier on November 16, 2009, 03:22:14 PM

I got an MT2 blank arbour for ARC at the midlands show to use to make a revolving chuck.

But it wont drill or bore???? to hard -Is there a way to soften it?

Gerhard 

Title: Re: Soft MT2 blank
Post by: John Rudd on November 16, 2009, 03:28:30 PM

It may be case hardened........ :scratch:

Dunno....Heat it and let it kewl naturally....

Title: Re: Soft MT2 blank
Post by: sbwhart on November 16, 2009, 03:56:50 PM

I've machined up quite a few blank morse tapers, her's a couple of links, they are quite tough stuff but you can machine them, have you tried a TC or tipped tool.

Me
http://madmodder.net/index.php?topic=1208.0

Dave
http://madmodder.net/index.php?topic=1239.0

Hope this helps

Stew

Title: Re: Soft MT2 blank
Post by: Gerhard Olivier on November 16, 2009, 04:34:01 PM

Thanks for tips
Tried a tc tip - cut but not enjoyed it .
 Here is the rest of the project.


(http://i608.photobucket.com/albums/tt161/geroli/LP617.jpg)
Started with a steel bar threaded the end M12 by 1mm to fit the chuck.

(http://i608.photobucket.com/albums/tt161/geroli/LP618.jpg)
Fitted the chuck to the thread.

(http://i608.photobucket.com/albums/tt161/geroli/LP619.jpg)
Then made an arbour cut concentric

(http://i608.photobucket.com/albums/tt161/geroli/LP620.jpg)
Backed the chuck onto the concentric arbour and then machined the spindle to bearing size- drilled and tappen the end for a bearing retention bolt.

(http://i608.photobucket.com/albums/tt161/geroli/LP621.jpg)

I have replaced the bolt with a cheese head as it is smalled since doing the pic.


Now I have got the bore in the mt2 to size but was going to hold the lot together with grub skrews - but this lot wont drill never mind tapping.  WOULD Locktite be ok around the bearing outers to hold the lot together???

Gerhard

Title: Re: Soft MT2 blank
Post by: Gerhard Olivier on November 21, 2009, 02:29:15 PM

The mt2 blank bored (the finish is not very good)  but as Stew suggested it cut with the TC tip.

(http://i608.photobucket.com/albums/tt161/geroli/DSC_0005-5.jpg)

Then it was impossible to drill so I made a small oven with 5 fire bricks and heat it up to soft oranje and left it in the oven to cool over as long as possible. Thanks John Rudd . Then drilled and tapped.

(http://i608.photobucket.com/albums/tt161/geroli/DSC_0008-3.jpg)

After polishing with wet and dry I assembled it


(http://i608.photobucket.com/albums/tt161/geroli/DSC_0009-3.jpg)

The End

Gerhard

Title: Re: Soft MT2 blank
Post by: John Rudd on December 02, 2009, 01:33:59 PM

Quote from: geroli on November 21, 2009, 02:29:15 PM

The mt2 blank bored (the finish is not very good)  but as Stew suggested it cut with the TC tip.

Then it was impossible to drill so I made a small oven with 5 fire bricks and heat it up to soft oranje and left it in the oven to cool over as long as possible. Thanks John Rudd .

Gerhard

Glad to hear you resolved your problems... :thumbup:

Title: Re: Soft MT2 blank
Post by: Bluechip on December 02, 2009, 03:21:58 PM

Bit late to the party but ....

http://www.axminster.co.uk/product.asp?pf_id=21342&name=groz&user_search=1&sfile=1&jump=44

I've used these on several occasions, They are readily machinable .. with hss or tipped tooling ..


Dave BC

Title: Re: Soft MT2 blank
Post by: John Rudd on December 02, 2009, 03:46:00 PM

ARC also do them and with differing threads if needed... :D

http://www.arceurotrade.co.uk/Catalogue/Blank-End-Arbors

Title: Re: Soft MT2 blank
Post by: Gerhard Olivier on December 02, 2009, 03:51:42 PM

That one is the 40mm metric one from ARC but it was no fun working with it but the end result came out fine.

I didn't know Axminster sold them - I have always had very good service from Axminster so worth remembering.

Thanks

Gerhard