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spiral bits

2826 Views 13 Replies 7 Participants Last post by  Gilbear
i am wanting to make mortises on my router table and want to know what spiral bit is best to use a up cut or a down cut?
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The UpCut spiral is what you want - the UP is in reference to a normal hand held position, meaning it's pulling chips up towards the collett and out of the cut - it gets confusing when in a table because up is actually down, unless I'm flipped!
You are correct. The only place I have ever used a down cut spiral bit was in a hand-held router,with a guide, to trim a small amount off a pattern,away from the shop and that was what my friend had. I don't own any.

Regards

Jerry
Hey you guys: I have a 1/2" shank 1/2" but solid carbide spiral up-cut bit I have never used. My wife bought it for me couple years ago and I have never used it. Part of the reason is I keep reading horror stories about spiral bits eating projects, destroying workshop, maiming humans and destroying cities. Is it ALL true? I saw a similar bit and it was $60. Maybe I should put it on Ebay huh?
Hi BW,
My personal opinion is they're smoother running and cleaner cutting than most straight cut bits 'cause they have more of a shearing action rather than chopping or chipping - and with less chip out on end cuts to boot, especially on verticle cuts where the bit is coming out the face material (box joints for instance) - and less edge damage to plywood layers also - haven't heard about them destroying any cities, but as to maiming humans, I wouldn't rest my nose on it while it's runnning!!
If you really want to get rid of it, let me send you my address - I'll dispose of it for you free of charge!!LOL
Seriously, I'd give it a try before canning it! Besides, it was a gift from the little lady - sounds to me like she knows what she's doing! Maybe I'll have MY wife contact her for gift suggestions!
"I'll dispose of it for you free of charge!!LOL"

ME TOO

I will pay shipping plus a bit for the shipping box and maybe kick in 10 bucks ,,, LOL :) :>)

Bj
OK, now I feel the price wars comin on - I'll match and raise ya $5 (U.S.) LOL
Plus I'll throw in my secret recipe for my Long Island Sweet and Sour mix!
Top THAT bj!!
Seriously man, give that bit a try!!
Birchwood

As you can see you should keep the bit and use it.
Next time you watch the router boys (Rick and Bob) they use the bit all the time.

Bj
Just in case, hahahahaha
$15.oo plus a 1/5 Old Crown that I got for Xmax. LOL
LOL

Keep the bit and use it :) you will like it I'm sure.
Bj
Birchwood said:
Hey you guys: I have a 1/2" shank 1/2" but solid carbide spiral up-cut bit I have never used. My wife bought it for me couple years ago and I have never used it. Part of the reason is I keep reading horror stories about spiral bits eating projects, destroying workshop, maiming humans and destroying cities. Is it ALL true? I saw a similar bit and it was $60. Maybe I should put it on Ebay huh?
I too have heard stories but I use them all the time and have never had one come out... for that matter I have never had any bit come loose in my about 30 years of using a router.

Any bit that has a shear angle will pull or attempt to pull the bit, in the up-cut case that direction would be out of the chuck/collet. That is why with any bit you don't want any part of you passing where the bit is or the bit passing where parts of you are... On a table you also want a guard in place..... just the same safety rules you use for any bit.
Hmmmm....money AND secret recipes, how good can it get! Okay boys, I think I'll put on my protective gear and fire up that bit for a couple simple cuts. I guess if I am AWARE of the potential and use proper care, as I try to do on ALL things, I should be fine. Thanks for all the GREAT offers though! HA!
i have the up-spiral bit and use it all the time to cut out circle's ect works like it should del schisler
Good call, Birchwood - let us know what you think (that is, if you survive :D - damn, I knew what I was gonna use that for too).
Hey Birchwood,
Just wondring if you tried out that bit yet and what you thought (also just checking to make sure you're not lying maimed on the shop floor somewhere ;) and of course, I'm gonna be upset if you mailed it to BJ!!)
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