[ryan50hrl]

Up cut spiral router bits are ridiculous... I know they're more work an all to make.....but 50-100 bucks for one straight bit.....:thumbdown::thumbdown::thumbdown:

 

[ryan50hrl]

Stupid Question......If I need to plunge cut 1 inch mortises.....will a 1 inch cutting depth bit work? Or do I need slightly longer in reality?

 

[4DThinker]

Hi Ryan,

So long as the bit has 1" of cutting edge and you step down the cut as you go you'll be alright. Make sure at least a little of the shaft above the cutting edge is showing too so the collet won't bottom out on your cut.

As for bit prices, just shop around. Amazon.com has 1/4"d 1" spiral upcut bits from under $20 to $80 or more.

Just curious... what kind/brand of CNC do you have?

 

[ryan50hrl]

No Cnc machine, trying to use a plunge router to cut some mortises. I need to work on a better hold down on my mortiser before I can get the precision I'm looking for. So my plan is to use a router to hog out most of the mortise, then use the chisel mortiser to clean up the corners.

 

[ryan50hrl]

No Cnc machine, trying to use a plunge router to cut some mortises. I need to work on a better hold down on my mortiser before I can get the precision I'm looking for. So my plan is to use a router to hog out most of the mortise, then use the chisel mortiser to clean up the corners.

I was mainly looking at 1/2 shank bits....which start around 35-40 bucks.

 

[jschaben]

I was mainly looking at 1/2 shank bits....which start around 35-40 bucks.

Like 4D said, need to shop around some but I will admit good deals on solid carbide spirals are a little tougher to find. Try this one
http://www.cripedistributing.com/vermont-american-1-2-carbide-upspiral-router-bit-23212.html
:smile:

 

[jschaben]

Here is another good source although it is a bit spotty. Onsrud uses this eBay store to get rid of stock overruns and things like that. I've got some 1/2" spirals with 1-1/2" cutting length for about $25 and compression and chip breaker bits for $10 and $12.
Like I said, it's a bit spotty as the selection varies from week to week, they usually update on Tuesdays. The bits are the sharpest I have. One more caution, pay special attention to the item description, the shank size is almost always same as the cutting diameter, ie a 3mm. bit will have a 3mm shank and a 3/4" bit will have a 3/4" shank.
http://stores.ebay.com/LMT-Onsrud-R...5528013&_sid=1025154553&_trksid=p4634.c0.m322
:yes:
EDIT - they are also a good source of saw blades but I still prefer the Freud.

 

[Fred Hargis]

I would buy one slightly longer than you need. Not so much because the shorter one won't work, but more because the extra length doesn't cost that much more, and that length does help on occasion. Yeah, they're expensive, and having them sharpened reduces the OD , but man, do they work good!

 

[4DThinker]

If you have a drill press, a forstner bit will do quick work of cleaning out the majority of a mortise.

 

[woodnthings]

use a self centering router base

No Cnc machine, trying to use a plunge router to cut some mortises. I need to work on a better hold down on my mortiser before I can get the precision I'm looking for. So my plan is to use a router to hog out most of the mortise, then use the chisel mortiser to clean up the corners.

http://search.yahoo.com/search?ei=utf-8&fr=ytff1-tyc-inbox&p=self centering router base&type=

Here's a link to the subject and some of the images show simple 2 or 4 pin designs. I made one for my quilt rack project and it saved me hours of time. :yes: