PDA

View Full Version : Newbie Anyone use down cut bits for wood cutting...



airbrush
06-22-2016, 10:44 AM
I'm mainly cutting wood on my machine and was wondering if anyone uses downcut bits on their machine....I hate sanding parts with a passion and wondering if down cut is a good way to go? or would they get too hot on wood??

ger21
06-22-2016, 11:08 AM
I use downcut bits almost exclusively for cutting hardwoods.

airbrush
06-22-2016, 11:10 AM
and how is the result with those? i'm assuming little to no sanding required..?

Where is a good source to get some...i ordered all of my tools from shars.com, but they have nothing for down cut...

tsinos
06-23-2016, 10:51 AM
Nice questions. I really need also a good supplier.

Στάλθηκε από το Elephone P8000 μου χρησιμοποιώντας Tapatalk

ger21
06-23-2016, 11:19 AM
and how is the result with those? i'm assuming little to no sanding required..?

Depends on what your doing, and what type of wood. Also depends on how well the parts are held down, and how rigid your machine is.
I sand everything that I do, but what I do requires it.

Most of my tools comes from Vortex Tool: Solid Carbide Router Bits and Compression Spirals for woodworking, plastics and non-ferrous industries. (http://www.vortextool.com) or Onsrud.

Jon.N.CNC
06-23-2016, 05:24 PM
Downcut spiral for pocketing, rebates etc compression spiral for contouring. Upcut spiral ball nose would be the only upcut bit I would use personally, upcut endmill spirals have little or no use for wood imo.

ger21
06-23-2016, 06:29 PM
upcut endmill spirals have little or no use for wood imo.

They are good for cutting vertically mounted boards, mortise and tenons, and box joints.

Jon.N.CNC
06-23-2016, 06:41 PM
They are good for cutting vertically mounted boards, mortise and tenons, and box joints.

Do you mean on the side grain? yeah I suppose if the mortise was very deep and small in size. You will still get furring I'd imagine so if it's not massively deep would a dc spiral no be better.

I must admit I haven't done any routing with end into side grain.

airbrush
06-23-2016, 07:06 PM
Downcut spiral for pocketing, rebates etc compression spiral for contouring. Upcut spiral ball nose would be the only upcut bit I would use personally, upcut endmill spirals have little or no use for wood imo.

...great...all of mine are upcut...ha...learning the hardway again..

still haven't found a good source for downcut bits...they seem to be the minority...

ger21
06-23-2016, 07:50 PM
still haven't found a good source for downcut bits...they seem to be the minority...

Downcut bits are very common woodworking tools. You won't find them at places like Shars, that sell tooling for metalworking.

ger21
06-23-2016, 07:55 PM
yeah I suppose if the mortise was very deep and small in size. You will still get furring I'd imagine so if it's not massively deep would a dc spiral no be better.

Depends on the use of the mortise, and the depth. For a shallow mortise where the edge is visible, I'd use a downcut. For anything deep or if the edges won't be seen, I'd use an upcut..

These were cut with an upcut bit.

daniellyall
06-24-2016, 02:48 AM
if you cut malamene up cut, down cut compression spiral bits work well and don't chip the edges. as ger21 says it all depends on what you cut, trial and error. tools2day sale all sorts of bits they have the good stuff and free shipping, there recommended settings are close and what type of material the cutters works well with is correct.

but if in dealt ask ger21

airbrush
06-24-2016, 12:39 PM
yah not a whole lots of options out there for down cut bits...at least in canada..lowes has a 1/4. and only found one place in the states so far that ship USPS...other wise i dont order from the states...couriers cost an arm and leg to get anything across the border....

Jon.N.CNC
06-24-2016, 03:52 PM
yah not a whole lots of options out there for down cut bits...at least in canada..lowes has a 1/4. and only found one place in the states so far that ship USPS...other wise i dont order from the states...couriers cost an arm and leg to get anything across the border....

Vortex are the best us bits I know of. Should be easy to get in Canada I would have thought.

Jon.N.CNC
06-24-2016, 03:54 PM
Depends on the use of the mortise, and the depth. For a shallow mortise where the edge is visible, I'd use a downcut. For anything deep or if the edges won't be seen, I'd use an upcut..

These were cut with an upcut bit.

They are very clean edges. That's interesting. You must have quite a z clearance there. 5axis?

ger21
06-24-2016, 05:00 PM
They are sample pieces, only 3" long. Done on my DIY machine.
http://www.cnczone.com/forums/cnc-wood-router-project-log/1356-another-first-router.html

ger21
06-24-2016, 05:26 PM
yah not a whole lots of options out there for down cut bits...at least in canada.

Royce AYR is a Canadian manufacturer of high quality router bits.

R57-322 | Royce//Ayr Cutting Tools (http://www.royceayr.com/en/products/standard-tooling/router-bits/solid-carbide/wood-wood-based-material/r57-322)

Here's a list of their distributors in Canada.
https://www.google.com/maps/d/viewer?mid=1PxGuZJLO9vPxh6KrskEbVSebEus

cyclestart
06-25-2016, 09:33 AM
Yonico down cut endmills are available on Amazon.ca.
I've only begun testing this brand but so far so good.
Btw it looks like the posties are going on strike soon :(.

ger21
06-25-2016, 10:17 AM
The box joint pics I posted earlier were done with a Yonico bit from Amazon.

airbrush
06-28-2016, 12:10 PM
will probably pick up that 1/4 yoniko...i would like an 1/8' down cut as well with an 1/8 shank...doesnt seem to exist

Arc-Light
06-28-2016, 01:20 PM
Not the same brand but I did find this 1/8" downcut with an 1/8" shank on EBay. Seems deccent quality! https://www.ebay.ca/itm/151926815022. I should add that the seller said it would work fine for wood, which is how I intend on using it.

airbrush
06-28-2016, 03:57 PM
yah thats a possiblity...was hoping for a 2" OAL thats what all of my up cuts currently are

ger21
06-28-2016, 06:23 PM
.i would like an 1/8' down cut as well with an 1/8 shank...doesnt seem to exist
Most of the major router bit manufacturers don't make 1/8" shank bits, because handheld routers don't have 1/8" collets.
Ebay is your best bet for 1/8" shank tools. You'll pay a fraction of what you'll pay anywhere else.

Arc-Light
06-28-2016, 10:31 PM
I noticed that Lee Valley is offering 1/8" down cut bits for dremels, I assume they are fine for CNC routers. Not sure on the OAL, but here's a link Mini Downcut Spiral Bits - Lee Valley Tools (http://www.leevalley.com/en/wood/page.aspx?p=73726&cat=1,33084)

ger21
06-29-2016, 06:22 AM
And here's a similar tool for 20% of the price:
10 1 8" 1250" Carbide 2 Flute Endmills Soft Plastic Downcut 1650 1250 500 | eBay (http://www.ebay.com/itm/10-1-8-1250-CARBIDE-2-FLUTE-ENDMILLS-SOFT-PLASTIC-DOWNCUT-1650-1250-500-/381500694057?hash=item58d3369e29:m:m45FuyKSOSiozDsQug3f-dQ)

Arc-Light
06-29-2016, 08:09 AM
Looks like the same seller as my earlier post with a volume discount. Good price!

kennected
07-04-2016, 09:40 AM
I found a downcut bit was my only way to run cutting profiles in thin sign work in 1/8" PVC sheet (Sintra board). Its a really flimsy sheet and my vacuum couldn't keep the sheet flat with an upcut. The upcut force would lift the sheet from the spoilboard and screw up the cut accuracy. Are there compression bits that would place the compression center in the middle of such a thin sheet?

airbrush
07-04-2016, 09:48 AM
ordered the 1/4 yoniko and will order an 1/8 and 1/6 from fleebay...to save my sanity from sanding

Biggs427
05-18-2017, 03:16 PM
The box joint pics I posted earlier were done with a Yonico bit from Amazon.

Gerry, what chip load, rpm, feed and DOC are you using in hardwood with your Yonico down cut?

I have a 7/32 3 flute down cut but can't find anywhere the specifications and Yonico doesn't seems to bother when I mail them...

ger21
05-18-2017, 03:53 PM
Anything under 1/4", I keep my depth of cut to no more than the tool diameter.
Feedrate depends on what you're doing, could be anywhere from 75ipm to 300ipm. 12,000-18,000 rpm.

With a 3 flute, keep the rpm lower, and the feedrate higher.

louieatienza
05-24-2017, 06:01 PM
Lately (which is past 3-4 years), for wood, I use single-edge endmills almost exclusively for most any tooling 1/4" or less. Creates larger chips, and ejects them a lot better. Plus, you can run your spindle at higher speeds, where you'll have more HP...

Biggs427
05-24-2017, 06:19 PM
Running at higher speed would help the speed control on my router to keep up...

I saw single flute dow cut in a catalognat work. I think I'll order one to try. I think it's FS Tools. Are these good cutters?

My new router is supposed to have 2hp but at lower rpm my old 1hp Makita had better speed control so it "felt" like it had more power at low speed...

I really need to complete my PID but sometimes life gets in the way.

ger21
05-24-2017, 06:42 PM
Yes, FS tools are good, and made in Canada.
Probably not the cheapest, though, but nothing is, when you live in Canada. ;)