TXHF 6mm Shank Single & Double Flute Straight Router Bit Set Woodworking Trimming Cutter 3mm,4mm,5mm,6mm,8mm,10mm,12mm (7pcs)

Product Information

We would recommend running at 18,000 RPM for most single, 2 flute and 3 flutes up OR down cut router bits That is true for the other way around, too. You can hardly tell a difference with the naked eye, and the bits will fit in "just fine" either way.

I've seen people do it, too, and they so far got away without accident or even physical injury. (Which makes the whole matter worse because that "proves" that it works.)As a rough rule of thumb we usually advise the depth of cut as 1 x cutting diameter. However, in some circumstances a smaller or larger depth of cut may be optimal. The following chip loads in the chart are applicable for single flute, 2 flute and 3 flute solid carbide router bits that are either up cut OR down cut. These recommended chip loads are NOT applicable to compression bits As this router also has a 3/8" collet, you could use an adapter to get down to a 6mm shank. Now, adapters aren't great, as they're one more thing that can go wrong, but if you were desperate, you can find a 3/8" > 6mm adapter here.

A down cut router bit is effective in forming a crisp edge around the hole that it is cutting. However, it is less effective in removing chips from the hole when compared to an up cut bit. Therefore, down cut bits are more commonly used for making shallow cuts rather than deep grooves.

edit: On @AstPace's good suggestion, I've added a couple of relevant points from the comments trail. CNC stands for Computer Numerical Control. Our CNC router bits are compatible with computer-controlled routers. CNC routers are particularly versatile as they can perform the tasks of the boring machine, the spindle motor, and the panel saw. Your router could be spinning the bit at 20,000 rpm. Ignoring the possibility of damaging your work piece, the personal risk is extremely high. A slower feed rate is required with down cut bits as this allows more time to evacuate chips and for them to be cut into smaller pieces that fall from the slot. This does mean that you need to be careful the bit does not overheat and consequently break. This can be due to the build-up of chips combined with a deep cut. However, using an imperial bit in the corresponding (well, almost corresponding) metric collet is dangerous both during the operation and when using the collet with your 6mm bits as intended afterwards.