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 Post subject: Machining Ti advice
PostPosted: Wed Feb 04, 2009 7:06 pm 
Two Fat Ladies

Joined: Sun Jun 01, 2008 3:14 pm
Posts: 88
Location: watford
Just bought Ti stem bolt and i think it needs a bit of modding to fit, which is no probs but just after turning advice.

Can I use HSS cutting tools and dies?? or do I need somthing harder?? speeds or tips would be usefull.

Cheers.


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 Post subject: Hard.
PostPosted: Wed Feb 04, 2009 7:32 pm 
aka Leo Swayer
aka Leo Swayer
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Joined: Wed Jun 18, 2008 7:15 pm
Posts: 6365
Location: Wales.UK
I tried drilling 5mm ti sheet once. Only a 6mm hole, so i drilled a 3mm pilot hole which took 3 hss bits, then a further 2 bits to open it out to 6mm.
It depends a lot what grade it is. Would it not be cheaper/simpler to buy the right bolt?


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 Post subject:
PostPosted: Wed Feb 04, 2009 7:38 pm 
Two Fat Ladies

Joined: Sun Jun 01, 2008 3:14 pm
Posts: 88
Location: watford
Not really, I have some carbide tooling steel, and quite like a bit of a challenge.

Just after some engineering advice.


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 Post subject:
PostPosted: Wed Feb 04, 2009 8:56 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18218
Location: Sunny Glasgow
Try here

http://www.timet.com/fab-p18.htm


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 Post subject:
PostPosted: Wed Feb 04, 2009 10:48 pm 
Two Fat Ladies

Joined: Sun Jun 01, 2008 3:14 pm
Posts: 88
Location: watford
Ah its ok, just had a lightbulb light above my head moment, problem solved. Cheers anyway!! :idea: :idea: :idea: :idea: :idea: :idea: :idea: :idea:


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 Post subject:
PostPosted: Wed Feb 04, 2009 10:51 pm 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
I hope it was one of the newer low energy bulbs. Sort of a good idea coming on slowly moment.


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 Post subject:
PostPosted: Fri Feb 06, 2009 4:02 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Tue Nov 14, 2006 2:27 pm
Posts: 2728
Location: In the Woods. . .
Trust you're sorted with feeds and speeds. . .
But just for info, Ti has a crazy low thermal conductivity, so heat doesn't bleed out into the job very well. Use LOADS of coolant, or run an airlineto the cutting tip, else the tip and flutes burn out vary quick. For turning, carbide helps 500%


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