Centec milling machine NT30 chuck.

This topic has 10 replies, 7 voices, and was last updated 24 August 2023 at 08:40 by Michael Callaghan.

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23 August 2023 at 09:51 #657603
Michael Callaghan
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@michaelcallaghan68621
Hi, my centec milling machine uses NT30 chucks, however I can’t find a slitting saw arbour this fitment. Can anyone point me in the right direction to purchase one. Thanks.
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23 August 2023 at 09:51 #21065
Michael Callaghan
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@michaelcallaghan68621
23 August 2023 at 10:35 #657609
Saxalby
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@saxalby
I had the same problem needing one for my Tom Senior horizontal spindle (Int30). I already had a Clarkson Autolock chuck so turned up a couple of adapters to take the various slitting saws I had.

Regards Barry
23 August 2023 at 16:59 #657658
DC31k
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@dc31k
Why do you need a special arbor for slitting saws? Do they not fit on the standard horizontal arbor? Or is it for use with the vertical head?

This might be a good place to start:

https://www.rdgtools.co.uk/acatalog/30-INTERNATIONAL-TO-1–FACE-MILL-ARBOUR-1040.html

It has a 1" spigot, that will suit many slitting saws. It has a key in it whch can be adapted or discarded. Remove and discard the drive dogs. All you need to make is a cap and some spacers (or buy the spacers or borrow them off the horizontal arbor).

You could buy a plain shank slitting saw arbor and mount it in a 30 taper ER32 collet chuck. Lots more bang for your buck that way. You can similarly make a 'plug in' full horizontal arbor to suit the ER32 chuck.
23 August 2023 at 17:06 #657659
Speedy Builder5
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@speedybuilder5
3 Ba is 4.0894mm diameter x 34.8 tpi or 0.73mm pitch
23 August 2023 at 17:08 #657660
Dave Halford
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@davehalford22513
I have gently used the horizontal arbor in the vertical head
23 August 2023 at 17:57 #657671
Michael Callaghan
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@michaelcallaghan68621
Dc31k, it would just make the job a lot easier using the vertical head.
23 August 2023 at 20:06 #657680
DC31k
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@dc31k
Rotagrip list one. The link is incomprehensible, so search for:

'slitting saw arbor 30 int rotagrip'
23 August 2023 at 20:42 #657685
Anonymous
Posted by Michael Callaghan on 23/08/2023 17:57:30:

…it would just make the job a lot easier using the vertical head.

In my experience a slitting saw on an arbor unsupported at the outer end will go walkies if the depth of cut in more than a few millimetres. On the other hand using a horizontal arbor, supported at the outer end, one can go as deep as the saw will allow with no tendency to wander.

Andrew
24 August 2023 at 02:27 #657707
Howard Lewis
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@howardlewis46836
If you are using a Slitting Saw, do NOT use a key.

If anything jams, the saw is likely to split and surround you with flying metal.

Luckily, I was not quite alongside when an Apprentice using a key (Disobeying instructions ) had his saw split. Half of the saw was still rotating on the arbor as the other pieces fell all around, and came down from the roof!

Howard
24 August 2023 at 08:40 #657720
Michael Callaghan
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@michaelcallaghan68621
Thanks Howard. Good point made, and I will be sure to make use of your suggestion.
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