Feeds and speeds. Some tips for a newbie please!

[Richard]

Google feeds and speeds calculator , it will take you to the little machine shop, input max spindle speed, material, mm/inch, cutter size and material and flute count. Hit calculate

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Yes, I have already looked at that. It's telling me 7k rpm and 2800mm/min for carbide and 1.6k rpm and 275mm/min for HSS. I was surprised at the difference beween the two cutter materials.

[Dave_stoke]

Yes, I have already looked at that. It's telling me 7k rpm and 2800mm/min for carbide and 1.6k rpm and 275mm/min for HSS. I was surprised at the difference beween the two cutter materials.

Carbide can take more stick as you can imagine. I didn't see the part you mentioned little machine shop sorry.

Can you override feed rate while it's running? If so use the slider to find the sweet spot. Then use that Feed rate.

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[Richard]

Carbide can take more stick as you can imagine. I didn't see the part you mentioned little machine shop sorry.

Can you override feed rate while it's running? If so use the slider to find the sweet spot. Then use that Feed rate.

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I'm running Mach3 (learning to drive this too!) so yes I can ramp up the feed.

I think that coming from using HSS and an old manual mill, the feeds and speeds mentioned seem a bit hair raising to me! LOL!

[Dave_stoke]

I'm running Mach3 (learning to drive this too!) so yes I can ramp up the feed.

I think that coming from using HSS and an old manual mill, the feeds and speeds mentioned seem a bit hair raising to me! LOL!

I'm using 0.1-3mm Mills I have a bin full of shafts without ends lol.
It's scary when it looks like it's smashing side on into a piece of brass stock. But in all honesty since I used the calculator I just back the feed off slightly. It's fine. Then I let it run at the feed rate... Still fine.

My cut depth is 0.5mm I cut at 1mm but scared the shit out of me.

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