How critical is the rpm recommendations for router bits versus the routers rpm ratings?

It really depends on what material you'll be cutting, how you'll be cutting it, and whether you're using a router table or hand router. There are TWO reasons for reducing blade speed: 1) to avoid burning the wood/blade and 2) to keep larger blades from spinning apart. If you're using <=1" dia blades you can pretty much disregard the spinning apart bit. I've been a professional woodworker for a dozen years and here's what I do: Check the manufacture's recommended blade speed, to get me in the ballpark. Then start cutting at around that speed. If the cut is rough, I'll increase the speed a bit. If there's burning, I'll reduce the speed. CRITICAL ISSUES will be when you change the wood feed rate (how fast you're plowing through the material), and when you change direction of cutting related to the grain (routing around rounded corners, changing routing angles). If you're routing along the grain, there's minimal resistance on the blade, but as you go around corners or change angles you'll be going cross-grain which increases resistance. Resistance=Heat. Every cut is different. Every wood is different. Go slow and shallow, but NOT too slow, and always watch the cut so you can speed up or slow down as needed. Also, for the advanced woodworker, there's the 'climb cut' (going backwards), which generally creates a whole lot less heat, but can be VERY dangerous.

how well and long do the bearings last ....I have some that last one cut ?

Mine are 1/2" shank. Not sure about your 1/4" bits but mine are still good as new.

You can but the feed rate must be Very Slow. I prefer to use name brand router bits like Bosch, Amana or others.

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Q: how well and long do the bearings last ....I have some that last one cut ?

Mine are 1/2" shank. Not sure about your 1/4" bits but mine are still good as new.

Q: Can it cut aluminum

You can but the feed rate must be Very Slow. I prefer to use name brand router bits like Bosch, Amana or others.

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🪚 Elevate your woodworking game with precision and power!

SAFETY FIRST - Anti-kickback design and protective coating minimize risks, keeping your projects smooth and secure.
BUILT TO LAST - Premium tungsten carbide tips with heat treatment ensure long-lasting sharpness and durability under heavy use.
MASTER EVERY CUT - 70 versatile router bits cover all standard woodworking profiles for flawless craftsmanship.
EFFORTLESS ORGANIZATION - Labeled wooden storage box mounts on your wall for quick access and a clutter-free workspace.
UNIVERSAL COMPATIBILITY - 1/4” shank fits all major benchtop routers like Bosch, DeWalt, Makita, and more—upgrade without limits.

The KOWOOD 70-piece router bit set features tungsten carbide tips with heat treatment and anti-kickback safety, housed in a labeled wooden box for easy storage. Compatible with all major 1/4” shank routers, it’s designed for professionals seeking durability, versatility, and organized efficiency in their woodworking projects.

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Manufacturer	Kowood
Part Number	1
Item Weight	7.78 pounds
Package Dimensions	19 x 15 x 4.5 inches
Size	70PCS-1/4
Material	Carbide
Number Of Pieces	12
Batteries Included?	No
Batteries Required?	No

KOWOOD Router Bits Set 1/4 Inch Shank ,70 Piece Router Bit Set,Tungsten Carbide Router Bits Kit for Professional Woodworking

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