Centec milling machine NT30 chuck.

[Michael CallaghanParticipant @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.

[Michael CallaghanParticipant @michaelcallaghan68621]

[SaxalbyParticipant @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

[DC31kParticipant @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.

[Speedy Builder5Participant @speedybuilder5]

3 Ba is 4.0894mm diameter x 34.8 tpi or 0.73mm pitch

[Dave HalfordParticipant @davehalford22513]

I have gently used the horizontal arbor in the vertical head

[Michael CallaghanParticipant @michaelcallaghan68621]

Dc31k, it would just make the job a lot easier using the vertical head.

[DC31kParticipant @dc31k]

Rotagrip list one. The link is incomprehensible, so search for:

'slitting saw arbor 30 int rotagrip'

[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

[Howard LewisParticipant @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

[Michael CallaghanParticipant @michaelcallaghan68621]

Thanks Howard. Good point made, and I will be sure to make use of your suggestion.

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