[BanduraMaker]

What's the word on cutting deeper than your flute length? For a project I'm working on, I need to precisely profile some wood stock (hard maple) that is 2.80" tall and my 1/2" bit has a flute length of only 1.5". I've found extra long that has a 3" flue but the darn tool is 6" LOA. All I really need is 3" flutes on like a 4 or 5" shank.

My bit supplier specs the bits at +.000 to -.002 in cutting diameter and I'm just wondering if I can do the full 2.8" depth with the 1.5" bit or whether that's going to cause problems. I can flip the stock but that leads to new inaccuracies.

Any experiences with this?

[dertsap]

if you can get enough stick out with your tool then the easiest thing to do would be to undercut the shank some with a bench grinder

[BanduraMaker]

Interesting idea. I got a PM to the same effect.

So here's another idea - my tool is 4" LOA so, if I chuck it 7/8" into the collet, what about cranking it down to about 10k rpm and using sandpaper to bring the diameter down?

The bit is carbide but, I only have to knock it down .001 to .002" to get the clearance right?

[ger21]

#2320 or #2365 here. Vortex Tool: Pass by Spiral Upcut - Series 2300

The actual price is under $100 when you add it to your cart.

[dertsap]

what about cranking it down to about 10k rpm and using sandpaper to bring the diameter down?

The bit is carbide but, I only have to knock it down .001 to .002" to get the clearance right?

you do only need to knock it down a thou or two but chances are slim to none that the sandpaper will work , worth a try though if you don't have a grinder

[BanduraMaker]

My wife is very displeased with you Ger.

[keebler303]

you do only need to knock it down a thou or two but chances are slim to none that the sandpaper will work , worth a try though if you don't have a grinder

I would not recommend wrapping sandpaper around a router bit going 10k RPM. :nono:


I would probably put a little harbor freight or dremel diamond burr in my dremel and do it by hand. If I had to get by.

Matt

[louieatienza]

They make necked endmills, where the shank diameter is slightly smaller than the cutting diameter... Bosch makes a 1/2" router bit with 3"+ flutes (I have one). Personally, I'd try and use or find a bit that will cut the full thickness of your work if possible...

[Andre' B]

They make necked endmills, where the shank diameter is slightly smaller than the cutting diameter... Bosch makes a 1/2" router bit with 3"+ flutes (I have one). Personally, I'd try and use or find a bit that will cut the full thickness of your work if possible...

The main reason for a necked endmill is that a 1/2" tool with 0.500" of flutes and 2.5" of neck that is 0.495" is a lot more ridged then a 1/2" tool with 3" of flutes.
Used a lot in milling molds, customers always seem to design things so we have to reach deep into small places.

[BanduraMaker]

I broke down and bought the tool in Ger's link - hence my wife's nasty looks in his direction.

I don't think that sanding would have been very dangerous to be honest though. I wouldn't be holding the sandpaper against the bit but rather doing it "shoe shine" fashion. If it got torn away, no big deal. Effectiveness is another matter.

I think that with a 5" OAL, I should be able to clear the stock without too much difficulty.

Thanks guys.

[RomanLini]

You said it was a carbide bit? They are extremely difficult to shape using most tools, even on a bench grinder!

HSS tools though are easy to grind to shape.

[BanduraMaker]

Which is why I'm not even going to try :cheers:

[eigstein]

it may be to late for your project ,but i found this on ebay . OAL 4.6" CEL 3.0" CED o.5" SHANK 0.5" shank length 1.400" .its carbide tipped and probably made in china,but stocked here in ill. the seller is SUPER CARBIDE TOOLS ltem #130600019407 @$12.25 with $6.00 shipping .

sincerely

eigstein