Annular Cutter Arbor

[Millwrightdude]

I have a bunch of Hougen style bits that I would like to use on my drill press, Can someone tell me what size arbor I have so I can figure out the Annular Cutter Arbor I need?

[Mac's Crew]

Morse taper #4

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[propanehotrod]

Looks like a Morse taper #4 to me.
http://www.davehylands.com/Machinist...aper-Chart.png

[Millwrightdude]

Thanks guys

[Lis2323]

Here's what they look like










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[Millwrightdude]

Mt4 to 3/4'' Weldon Shank?

[Lis2323]

Mt4 to 3/4'' Weldon Shank?

I will need to look later. Might be MT3


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[Millwrightdude]

I looked at the part diagram from my drill press, Its a MT3. This is what I think I need?


https://www.amazon.com/Annular-Cutte...ustrial&sr=1-3

[Lis2323]

Mine is MT3.


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[farmersammm]

Just make sure you have a large enough motor to turn 'em. I can't use annulars on my small press, not enough balz. My mill is the only thing that will run them well (1.5hp motor)

[farmersammm]

Here's the dimensions of the tapers https://www.morsecuttingtools.com/ho...Dimensions.pdf and https://www.engineersedge.com/manufa...able_13465.htm

[Millwrightdude]

My drill press is 1.5hp

[Millwrightdude]

So will my drill press do it?

[Lis2323]

So will my drill press do it?

You would need to be down in the 200 rpm range or less depending on hole size.


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[Lis2323]

Just make sure you have a large enough motor to turn 'em. I can't use annulars on my small press, not enough balz. My mill is the only thing that will run them well (1.5hp motor)

That's what I prefer over a drill press. More rigidity in the spindle, better RPM selection and ability to clamp the work securely.

I just use a 3/4" collet for the annular cutter.

Oh and power feed!


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[Country Metals]

Hougen recommends 550 for bits up to 1 1/4" I believe.

I run steel (up to 1 1/4) on 660 and stainless and large steel at 325 on my Bridgeport

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[farmersammm]

So will my drill press do it?

I think it will. Keep to the lowest RPM, and keep the belts tight. My greatest problem has always been belts slipping. Even the mill will slip if I forget to really put some strain on the belts.

[farmersammm]

Here's a comprehensive speed/feed chart for annulars https://www.icscuttingtools.com/pdfs...ar-Cutters.pdf

To me anyways, these are aspirational speeds on my machine. If I exceed 230rpm, the cutter will cut allright, but you have to be careful not to overload it while continuing to take material. Anything 1", and above, has a tendency to cause my belts to slip when the cutter starts to stall. And it's a Catch-22..............the cutter starts to stall because the belts start to slip I don't have the best machine, so it might not be representative of how your drill will handle the cutters.

[Lis2323]

I think it will. Keep to the lowest RPM, and keep the belts tight. My greatest problem has always been belts slipping. Even the mill will slip if I forget to really put some strain on the belts.

Here is a 1.5 HP drill press I had where I added a jack shaft to enable RPMs down to 150.







With the reduction of speed it is even more critical than ever to have TIGHT belts as samm mentioned.


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[lars66]

I use annular cutters up to 2 3/4"x 4" in a radial drill with coolant inducers and have always found it best to start below recommended speeds and feeds to get a feel for speeds and feeds that don't set up chatter.

[M J D]

I use the cutters quite often in my dewalt 1622 magnetic drill. 2 speed gearbox, 300 and 450 rpm. Up to 7/8" or so I use high and then low for larger ones. Ive ran 1-3/4" cutters with it and had no chatter issues at that speed. I generally use cutting oil instead of coolant as most holes I punch are horizontal.

[Millwrightdude]

Ive been thinking I might find a mag drill

[MinnesotaDave]

Ive been thinking I might find a mag drill

I really love mine Have not tried the cutters in the vertical mill yet - but I might.

[tapwelder]

You won't be able to use pilot nor will the slug eject if you use a end mill holder.

[Lis2323]

You won't be able to use pilot nor will the slug eject if you use a end mill holder.

Yes. Good point


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