Well, I may have come across an article on router rpm's, I don't remember, but a light bulb went off in my head. I checked and had to really look hard to find the maximum rpm's for this set of router bits.....8,000 rpm's! OK, so I check my PC router to find that the minimum rpm is 10,000 rpm's! I got a little nervous at that point. I mean, the cutting head on that raised panel bit must weigh between 2 and 3 lbs if not more. Well, I know that when you apply rpm's to something that has mass to it, it creates something called centrifugal or g-force. The weight of that object increases relative to the speed at which it is turning. I began to imagine that cutting head (made in China) coming apart and potentially doing some serious damage....to my hands, fingers, etc. Now understand that I am a serious guitarist. I probably shouldn't even be doing woodworking. But, I take precautions (I now own a Saw Stop tablesaw), if you get my drift.
Ok, here's the bottom line:
If you have a router that turns only a single speed....it's probably 30,000 rpm! Do Not use it....at that speed. Either purchase an attenuator to control the speed or get rid of it completely and purchase a router that has variable speed control.
Amana Tools has posted on their website a rule of thumb guide for maximum speeds for their bits:
Router Bit Dimensions | Max RPM |
2" (Less than 50) | 28,000 |
2" - 2-3/8" (50-60mm) | 22,000 |
2-3/8" - 2-3/4" (60-70mm) | 19,000 |
2-3/4" - 3-1/4" (70-80mm) | 16,000 |
3-1/4" - 3-5/8" (80-90mm) | 15,000 |
3-5/8" < (90-100mm) | 13,000 |
Now, other manufacturers may have different requirements.
I have a crew of carpenters that work for me. Recently, I discovered that the one router they use turns 1 speed....30,000 rpm. In doing some research to address this safety issue, I looked at the website of the low-end tool store which shall remained unnamed, and found that, Lo & Behold, that panel cutting set speed has sped up to 10,000 rpm's! Still, I'm not taking any chances with this stuff.
Please be aware that the maximum rpm for individual bits may not be easy to find, but the guide above should be helpful.
One final thing: there is a guard on the market that should add some safety to your routing> Bench Dog's Panel Loc.
Ted Broussard
Tags:
Interesting topic, Ted. For the sake of any others doing research, here are a few more resources which I found through a quick Google Search:
http://www.newwoodworker.com/ref/rtrbtspds.html
http://www.rockler.com/blog/index.cfm?mode=entry&entry=7F490C86...
http://woodzone.com/Merchant2/tips/router_bit_speeds.htm
http://home.howstuffworks.com/home-improvement/repair/choose-router...
KregRep said:
Interesting topic, Ted. For the sake of any others doing research, here are a few more resources which I found through a quick Google Search:
http://www.newwoodworker.com/ref/rtrbtspds.html
http://www.rockler.com/blog/index.cfm?mode=entry&entry=7F490C86...
http://woodzone.com/Merchant2/tips/router_bit_speeds.htm
http://home.howstuffworks.com/home-improvement/repair/choose-router.
Here is some more Value adding resources :-
https://theedgecutter.com/best-router-bits/
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