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### Question #: 14994

Question: [Onsrud 1/4" Cut Diameter Two Flute Compression End Mill for Wood and Laminated Wood] Based on these speeds, what should the expected cut depth be for hardwood?

Current Solution

A safe depth would be the diameter of the end mill. If you have CNC experience, you can also use sound as a very good indicator of the sweet range of the depth. If you hear the spindle struggling, it's probably best to either slow the feedrate, or reduce the depth. The chip size is also important to indicate if the end mill is cutting efficiently. you want to make sure the chips are not coming out as dust. There should be some meaty chips.

I will typically push my end mills and use the full depth of the material if there is enough flute length to do so. If I hear the spindle struggling, reduce the depth by 10% or so.

There are so many variables and I would suggest starting with the chip load calculations found on this product page.

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