ShopBot Tools

Technical Q & A

How do I choose a bit? What Feeds and Speeds should I use?

Feeds and Speeds
Here is the best info we have here in support. This is one of the hardest things for people to get right as it is a learned skill to come up with and adjust feeds/speeds. There is no set in stone number for any project:

The info I am providing is on feeds/speeds and calculating them using chipload. I am including some document links and want to throw in a couple of reminders that chip-load values are key, so finding you bits chipload from the manufacturer and then finding the federate plus 12k-18k rpm that gets you the chipload:
A good place to start -http://www.woodguide.org/files/2014/...bit_basics.pdf

A good reminder to use chipload calculations -http://www.talkshopbot.com/forum/sho...-find-the-data

And an extra reminder that chiploads are based on a 1x full depth cut. 1x full depth is the diameter of the bit. So a ¼” bit has a 1x full depth of cut of ¼”.


https://www.shopbottools.com/training/tutorials See feeds and speeds category

Feeds/Speeds
https://www.youtube.com/watch?v=glfoB7THcqs Tips for Cutting Aluminum
https://www.youtube.com/watch?v=p-lj5q7xy1Y Cutting Acrylic
https://www.youtube.com/watch?v=a2DwsC2iDNY l Tool Database and Bit Selection
https://www.youtube.com/watch?v=XteEyLYvtXA Plywood
https://www.youtube.com/watch?v=1p9vpZpMhNU Plastics
https://www.youtube.com/watch?v=zzzIpC39WUg (for milling but the techniques are very similar)


Documents:

https://www.dropbox.com/s/s62flixoq3...harts.pdf?dl=0

https://www.dropbox.com/s/bwl3opve8b...20Ref.pdf?dl=0

https://www.dropbox.com/s/rm4vsfny3k...stics.pdf?dl=0

https://www.dropbox.com/s/umrdtr6o3r...minum.pdf?dl=0

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