chipboard cutting with 35k-45k spindles

[Ger21]

Is you're machine capable of cutting at 40m-50m/min? And holding parts down at those speeds? If not, the higher RPM will be of no benefit.

An 18,000 rpm spindle can easily cut at 30m/min with a 3 flute compression bit.

[Boyan Silyavski]

Is you're machine capable of cutting at 40m-50m/min? And holding parts down at those speeds? If not, the higher RPM will be of no benefit.

An 18,000 rpm spindle can easily cut at 30m/min with a 3 flute compression bit.

Exactly, thats what i meant. You said it better. But still 3kw more, according to my calculations will be aproximately 30% faster / or deeper/ so if in a production maybe its worth. But as you say, they will have to be able to hold it down properly, so its the setup... I believe these types of spindles are meant to go on machines that are able to auto feed the sheets and auto evacuate them from table to next stage. The whole chain of production must be fast

[mintoska]

Thanks guys for your posts...
And sorry about delay with my answers, was out of office few weeks...
I think my problem is: I have not explained situation how we work...
We are furniture producers. Each day we cut approx 50 laminated chipboard sheets (around 3-5km long cutting way per day)
Yes, with one thing I agree, with expensive bits is possible to reach 22m/min. and more. If you are on MDF cutting daily... Unfortunely, we using MDF boards really rare. If you cutting laminated chipboard, is absolute nonsense to use expensive bits. They loose sharpness very quick. In that case we buy cheap Chinese bits and after just throw them away... But with cheap Chinese bit you never reach speed more as 9m/min. Our partners have 24000rpm. And they are able with same bits to cut approx 20% faster as our 18000rpm...
That is point about idea to increase rotation speed. For me is logical: more rpm=more working speed.
We need to increase our production speed. We have a choice to buy another faster spindle or enter the second shift. For third CNC router we have no place available...
sincerely

[mintoska]

Is you're machine capable of cutting at 40m-50m/min? And holding parts down at those speeds? If not, the higher RPM will be of no benefit.

An 18,000 rpm spindle can easily cut at 30m/min with a 3 flute compression bit.

1. Yes. Yaskawa servos 65m/min
2. Yes. 18,5kw vacuum
3. really? We have tested lot of bits. Max speed we have with 3flutes reached was 22m/min by non-laminated 18mm MDF board cutting ( Kyocera 12x22x75 S12x40 Z3 R ).

[Ger21]

When you say "laminated chipboard", what is the laminate? Is it a plastic laminate, or a melamine paper laminate?

Plastic laminate is very abrasive. If you are cutting a lot of plastic laminate, you should probably be using diamond bits. Cheap diamond bits are under $200 US, but should last for 400 sheets or more.

If you are cutting melamine sheets, good quality carbide bits are about $90-$130, and are good for about 100-125 sheets.
But you can get them sharpened about 3 times, for about $25 each. This works out to about $0.25 per sheet over the life of the tool.

If your bits are getting dull quickly, there's a good chance that you just aren't cutting fast enough. Doubling the feedrate will typically double your tool life, if RPM remains the same.

Try something like these:
https://www.onsrud.com/Series/60-100MW.asp
https://www.onsrud.com/Series/60-100MC.asp