CNC Router Bit sizes

[Dan Mauch]

Are you sure the depth of cut is 0.70?. The usual rule of thumb is that the depth of cut is 1/2 the diameter of the bit. 0.070 is more like what it should be.
Dan Mauch

  I started out at 1/8" but really only produced more sawdust so I went to a smaller bit, and it is better for me.   I have used a wide variety of bits but really my current favourite is a 1/16" router bit.   When you first look at it you'd think that it couldn't possibly give a smooth cut but it does.  If I'm doing a 2.5D  bass relief than I use round tipped end mills of the same diameter.

Gearotic does a perfect job of deciding what should be an "inside" cut and what should be an "outside" cut so that your gears turn out  really nice and as expected.

My rpm is unknown but I'd guess at 2 - 3000 rpm.  My feed rate is nominally at 100 its but the way my stepper motors are set up they never get up to that speed there's just too many changes of direction in the gCode.  My depth of cut is only 0.70 inches because my motor on my spindle is really from a radio controlled toy with 45 turns.  It uses 12 Volts.

Maybe this will shed some light on what some other are using

John

[kflys]

Any idea where I would change my Offset in the software?

[kflys]

Also where do I buy Good end mills cheap?

[Mooselake]

Cheap and good often contradict each other.  That said, I've had good luck here, especially if you watch out for their sales and closeouts.

Look here for good advice on what to do after you get those endmills.  They used to (and probably still do) have a tutorial on how to determine feeds and speeds, but one of their techniques was going until you break one and backing off.  Precisebits sells good bits, but they aren't cheap.  I am, so I mostly stick with the Drillman.

Kirk

[John T]

You guys are right I take 70 thousands cuts.  sorry