I am a bit confused about the bits I received. I ordered the following…
(1) ¼ Inch 2 Flute Up-spiral Bit
(2) ¼ Inch Single Flute Up-spiral Bit
My confusion is in identifying them, both the bits seem to have 2 flutes.
Are both bits double flute or am I confused on how to identify them?
Flutes are the side grooves just count them. Looks like both are double but hard to tell from the top
the one on the left looks like a compression bit, with its flutes crossing like that, but the angle makes it difficult
Neither of them look like the single flute bit that i got.
If I count the flutes, then both are double. @Jatt you are correct, the one on the left has two flutes which wrap ccw but also has two short flutes at top which wrap cw. Is it a compression bit? If so what the benefits of a compression bit?
TIA!
My understanding is compression bits reduce tear out on both sides of the board when you are doing through cuts / profile cuts. so on the top side of the board they are a down spiral and on the bottom side of the board they are an up spiral causing a cleaner shear of the material. The cut material hopefully clears out of the cut behind the bit and gets sucked up the vacuum hose.
Hope this helps.
Here’s a nice primer on the different kinds of bits:
I’ve been using mostly compression bits, the ones that they sell on the maslow shop have a nice low needed depth and seem to work really well with the maslow for cutting plywood and leaving clean edges on both the top and bottom of the cut.
Going to follow this discussion 
Do you cut through 18mm at once? Which rpm and feedrate?
Try this:
Thank you
It looks like we sent you a compression bit instead of the single flute bit you ordered! Sorry! If you shoot an email to info@maslowcnc.com we’ll send you a single flute bit right away!
