Centec milling machine NT30 chuck.

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.

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

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.

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

I have gently used the horizontal arbor in the vertical head

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

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

'slitting saw arbor 30 int rotagrip'

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

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

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