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5/8" hole, Can I Use a Center Cut End Mill?

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Forum topic by JerryinCreek posted 05-22-2017 04:15 PM 401 views 0 times favorited 8 replies Add to Favorites Watch
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JerryinCreek

201 posts in 1677 days


05-22-2017 04:15 PM

Need to cut some 5/8” holes approximately 1/16” deep into maple veneer to add a disc of aluminum as part of a decoration. Was looking at 5/8” Center Cut End Mills with 1/2” shanks. Any reason I can’t use this tool to accomplish my task?

-- Jerry, Johnson Creek, WI "If it was meant to be different it would be."


8 replies so far

View TheFridge's profile

TheFridge

8298 posts in 1321 days


#1 posted 05-22-2017 04:30 PM

It’ll make a circle but you probably need something with spurs like a forstner to sever the grain first.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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splintergroup

1696 posts in 1058 days


#2 posted 05-22-2017 04:33 PM

It’ll work beautifully!

Of course you could also use a Forstner bit since 5/8 is a common size, but they have a centering spur which may or may not be a problem for you.

The end mill will not have any centering spur so you will need to clamp it down securely before plunging (using a drill press I assume).

Typically end mills have a shank diameter equal to their cutting diameter so the bit you were looking at is slightly unusual (and therefore more expensive), but it will work fine. The more flutes (cutting edges) the better for getting a clean hole.

View Jimintomahawak's profile

Jimintomahawak

57 posts in 311 days


#3 posted 05-22-2017 04:59 PM

A center cutting end mill doesn’t cut a flat bottom. Center will be higher by .01-.015”. It is quite risky in a drill press, everything needs to be rigid end mills will move anything that isn’t clamped very secure. A spade bit or Forstner is better IMO.

-- Laziness drives creative thinking...

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JerryinCreek

201 posts in 1677 days


#4 posted 05-22-2017 05:04 PM

Thank you all for your input! Based on what I’m hearing, the Forstner sounds like a good route for me to go. The cenetering spur is not a problem.

-- Jerry, Johnson Creek, WI "If it was meant to be different it would be."

View HokieKen's profile

HokieKen

4510 posts in 974 days


#5 posted 05-22-2017 05:05 PM

I don’t think a center cut end mill is the ideal tool for the job. As Jim said^ center cut is not flat-bottomed and without a guide of some sort, it may be difficult to get a clean cut using a drill press. A forstner bit would be the easiest solution if the center point isn’t a problem. If you can’t have the center point, I’d use a bottom-cleaning bit in a plunge router. If the endmill is your best option, I’d try a few cuts on some scrap before putting the project pieces under it.

Never mind, you beat me to it :-)

-- Kenny, SW VA, Go Hokies!!!

View Jimintomahawak's profile

Jimintomahawak

57 posts in 311 days


#6 posted 05-22-2017 05:37 PM

:) I have a nice scallop cut laying around somewhere from a ⅜ end mill… Had it clamped down good but it rotated drill press table… It was locked too. Looked like it was done with a spirograph….

-- Laziness drives creative thinking...

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JerryinCreek

201 posts in 1677 days


#7 posted 05-22-2017 05:56 PM

You guys are a big reason I’m in LJs! I can always find some good advice to help me with my projects. Lots of knowledge out there! Thank you!!

-- Jerry, Johnson Creek, WI "If it was meant to be different it would be."

View MrRon's profile

MrRon

4492 posts in 3079 days


#8 posted 05-24-2017 04:33 PM

All the above will work. I would also recommend clamping a piece of wood over the spot where you want to bore the hole and bore through the top piece and into the veneer. This is so you don’t tear the edges of the veneer.

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