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About LinkBackswhat's the best endmill for wood? Is it HSS, Carbide or PCD? for me HSS only last in minutes before it started to smoke and Carbide lasted longer but I have to clean it everytime as the wood particle sticks on it.
what's the best endmill for wood? Is it HSS, Carbide or PCD? for me HSS only last in minutes before it started to smoke and Carbide lasted longer but I have to clean it everytime as the wood particle sticks on it.
We use solid carbide compression type bits for most wood.
You have to look at chip load . Faster rpm on the spindle isn't always better. The goal to have the waste from cutting be small chips of wood not fine dust. I usually run a 4 hp spindle at 14k rpm and 320 inches per min with a 1/4" diameter 2 flute solid carbide compression bit.
You can find chip load calculators online.
Just input wood type , bit type, diameter and it will give you feed rate and rpm .
Jon
What type of wood are you cutting ? And what size bit feed rate rpm nd number of passes?
thanks for the advice I guess I have to learn about chip load etc.
I cut teak wood and hard wood with 12mm solid carbide feed is 250mm at 15k rpm. with a 2.2kw chinese spindle. I think there must be something wrong here.
Are you trying to cut in one pass?
That little spindle would take 3 passes to do 19mm of thickness
step down at 3mm so todo 19mm = 19/3 = 6.3 passes and my step over is 35%. or is it my spindle is very2 poorly made? it sounds like it is under power or something
Are you trying to cut in one pass?
That little spindle would take 3 passes to do 19mm of thickness
What does your inverter say for rpm or HZ?
6 passes is a lot of passes
We use bits like this one for solid wood.
CNC Spiral Flute Plunge Solid Carbide by Amana Tool
it says 250Hz I can go up to 400Hz which is 24k rpm.
I just calculate my chipload : feed 256/15k*2 = 0.008533333 is this correct? all is in metric
Here is a chip load chart to look at its in inches etc. you need to get the chip load down to like .004 that's per flute . My guess is your bit is getting plugged with fine dust.
You're cutting way too slow. Try 2500-4000mm/min at 15,000rpm.
With teak, you must use carbide, as HSS will dull quickly from the silica in the teak.
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
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