Tangential/Diamond tool holders.

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Subject Author Date
Tangential/Diamond tool holders. Youra 05-29-2008
Posted by Youra on May 29, 2008, 4:29 am
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Hi all.

Stumbled across these as the result of another thread on turning tools
generally - for example this sort of thing:

http://www.gadgetbuilder.com/ToolHolders.html#Tangent
and (commercial site)
http://www.eccentricengineering.com.au/

To me, these seem like rather a good idea - in particular sharpening
HSS bits for general purpose turning becomes a breeze (in theory at
least) but lack of general adoption makes me think that there's
something I've missed. One thing that comes to mind is unless you have
a couple of sharpening, getting anything other than a single angle of
top-rake is difficult.

Are there any opinions from the group?

Thanks,

Youra.

Posted by lfoggy on May 29, 2008, 6:51 am
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Thanks for pointing that out. I'd never heard of this method of tool
holding but it certainly seems to have advantages. I particularly like
the idea of using round HSS blanks to make accurate round nosed tools.
Has anyone used one of these in anger ? Obvious question is does the
tool ever slip down the holder due to the cutting forces ?


--
lfoggy
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View this thread: http://www.rcgroups.com/forums/showthread.php?t=871547


Posted by Trevor Jones on May 29, 2008, 9:01 am
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lfoggy wrote:

> Thanks for pointing that out. I'd never heard of this method of tool
> holding but it certainly seems to have advantages. I particularly like
> the idea of using round HSS blanks to make accurate round nosed tools.
> Has anyone used one of these in anger ? Obvious question is does the
> tool ever slip down the holder due to the cutting forces ?
>
>

If the tool slips, it moves away from the part, rather than digging in.

FWIW, the rather crudely built unit that I made, uses one 1/4" screw
to clamp the tool. and I have stalled the 3/4 HP motor on my S7 without
moving the bit in the holder.

Cheers
Trevor Jones


Posted by _ on May 29, 2008, 7:28 pm
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On Thu, 29 May 2008 13:01:00 GMT, Trevor Jones wrote:

> lfoggy wrote:
>
>> Thanks for pointing that out. I'd never heard of this method of tool
>> holding but it certainly seems to have advantages. I particularly like
>> the idea of using round HSS blanks to make accurate round nosed tools.
>> Has anyone used one of these in anger ? Obvious question is does the
>> tool ever slip down the holder due to the cutting forces ?
>>
>>
>
> If the tool slips, it moves away from the part, rather than digging in.
>
> FWIW, the rather crudely built unit that I made, uses one 1/4" screw
> to clamp the tool. and I have stalled the 3/4 HP motor on my S7 without
> moving the bit in the holder.
>

Links to pictures would be clicked. Can you do them?

Posted by Trevor Jones on May 30, 2008, 12:30 am
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_ wrote:
> On Thu, 29 May 2008 13:01:00 GMT, Trevor Jones wrote:
>
>
>>lfoggy wrote:
>>
>>
>>>Thanks for pointing that out. I'd never heard of this method of tool
>>>holding but it certainly seems to have advantages. I particularly like
>>>the idea of using round HSS blanks to make accurate round nosed tools.
>>>Has anyone used one of these in anger ? Obvious question is does the
>>>tool ever slip down the holder due to the cutting forces ?
>>>
>>>
>>
>> If the tool slips, it moves away from the part, rather than digging in.
>>
>> FWIW, the rather crudely built unit that I made, uses one 1/4" screw
>>to clamp the tool. and I have stalled the 3/4 HP motor on my S7 without
>>moving the bit in the holder.
>>
>
>
> Links to pictures would be clicked. Can you do them?

I'll dig them out and post them where they can be seen.

http://metalworking.com/dropbox/tangential_toolholder_good.txt

http://metalworking.com/dropbox/tangential_toolholder1small.JPG

http://metalworking.com/dropbox/tangential_toolholder2small.JPG

http://metalworking.com/dropbox/tangential_toolholder3small.JPG

http://metalworking.com/dropbox/tangential_toolholder4small.JPG

That about covers it.

Not fancy, but has served me for a bit over ten years now.

Cheers
Trevor Jones


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