Where to buy router bits

[the great waldo]

I am a beginner and planning to buy a stock of CNC bits for wood. Where should I buy it. I find really cheap ones on bangood. But they don't offer any data about feeds and speeds. Any ideas?

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Hi Feldah
I'm in Austria and get most of my cutters from https://www.sorotec.de/shop/Cutting-...END-Mill-WOOD/ they are not the cheapest but not too expensive and good quality. Buy cheap chinese ones to experiment with and use the better ones for proper work.

Cheers

Andrew

[feldah]

That's fair enough. If I can do my spoilboard once with it I am happy. I think one time will be all ready 200 - 300 m.
What cutting depth do you do? More than 1mm in one run?

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[paulus.v]

My spoilboard is actually my router table. I never cut through it. I am surfacing it only every few months with a depth of a few tenths of a millimeter. How have you got 300 m cut for the spoilboard surfacing? My table is 1400x1000 mm, with my 2" dia tool I take 50 mm width of cut which means 20 cuts of 1.4 m = 28 m.

As MDF is abrasive it is important to have the chipload as high as possible. It depends on the stiffness of your router, the tool dia & length, depth of cut and desired cut finish.
For example, let's say you are cutting with 24k rpm and 1000 mm/min feed and I do it at 8k rpm and 4000 mm/min with the same cutter. So for the chip thickness that I am cutting you make 12 cuts, your tool will wear 12 times faster.

You want to get out of the cut chips or shavings not dust.

Here is an example:





And here is rounding with an Arden "point cutting roundover" bit (for straight cutting I'm using the popular Chinese 6 mm dia single flute carbide bits):

[feldah]

Great explanation. Sadly I won't have prior information about the stiffness. But I know that I will use a 2.2kw Spindle which can handle 1/2" shanks.
My 300m comes because my table is 4 times longer(1,2m - 1m) x 4m. Because it is my first cnc I am building. I was expecting an uneven table with 3mm height difference. But that's just a guessed number. So with a 2" tool and 1mm cut depth I assumed 20 x 4m x 3 rounds -> 240m. But as you said you are going a few tenth of a milimeter it will even be more runs.

[paulus.v]

But as you said you are going a few tenth of a milimeter it will even be more runs.

I'm taking a few tenths of a millimeter to clean the table from time to time. You may be able to go 3 mm depth in one pass but it depends on the stiffness of the machine.