[abeekaushik]

Hello friends can anyone help me out to slecting feed ,speed ,doc for a 8 mm straight two flute on plyboard of 25 mm thick made of hardwood ....please help me any information will be walcome

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[ger21]

Is that carbide tipped, or HSS?

It really depends on what your machine is capable of.

Anywhere from 10,000 rpm and 100ipm to 18,000 rpm and 300ipm.
Assuming the bit is new and/or sharp.

[abeekaushik]

It's a solid carbide 8mm bit and I have a 3hp spindle

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[abeekaushik]

Hello
Ger21 ... thanks for answering ...yes it's a solid carbide bits ...it's flute langth is 35 mm and it's a 8 mm diameter two flute straight bit ...
And I'm cutting a bwr (boiling water resistant) plywood of 25 mm thickness

And I have a 4x8 table cnc with 3 hp spindle which can go 18000 rpm and machine can go to 500 ipm....

Well I tried it today on plyboard with these specifications ....
Feed ...118 ipm
Spindle ....10000 rpm
Doc .... 5
Opretion ....slotting 25 mm plywood
Problem .....the tip of tool has visible black mark ..it heated up at tip
And it sounds very crazy when cut


Note ...I checked tool is ok it's new sharp and strong ...it heated up but still it's flute are not burned ..

Please suggest me ...welcome for all


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[Zorbit]

Spiral bits work much better, especially the serrated "ripper" type. I would use an upcut ripper if you can secure the work well. If you need a good finish, you can do a full depth finishing cut with a compression bit.

[KH0UJ]

I use this on a daily basis on a hardwood, 24,000 RPM @ 2000mm/min, it can even cut aluminum and mild steel, on a hardwood a 5mm step per pass is very safe enough, you can run it all day on a 5 pass 25mm hardwood.I run it @ 1mm per pass because our products are very small