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Posted: 3/12/2017 1:33:57 AM EDT
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I would like to know what you guy's have found as the best speed to run when machining an 80% lower? most routers the lowest speed is way faster than the milling bit should be run at.
I have the Rigid 24012 variable speed, low is 20,000 and high is 30,000rpm this is way faster than you should run these bits at, looking to get the best surface finish possible. |
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Quoted:
I would like to know what you guy's have found as the best speed to run when machining an 80% lower? most routers the lowest speed is way faster than the milling bit should be run at. I have the Rigid 24012 variable speed, low is 20,000 and high is 30,000rpm this is way faster than you should run these bits at, looking to get the best surface finish possible. I am using a Dewalt compact router. Variable speed 16k-27k. I have completed four lowers with it. The first lower I ran the router at the lowest setting of 16k - way too slow! Lots of chatter and a poor finish. I have since learned that about 20-22k or so will give me a good finish and good control. |
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Quoted:
GO by feel. Idk what RPM mine is. I go by sound and feel. It's tough to go by sound and feel if you've never done it before. A frame of reference takes experience. You have to know what the sound and feel is that produces good results. Until then it's helpful to ask guys who've done it where a good starting point is. That being said, if a guy pays attention to what he's doing he's not likely to screw up a lower beyond salvage, aesthetics aside. In other words, it may not look the best, but it should function just fine. |
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With that Ridgid R24012 router set your speed to 3-3.5. But there are other variables to consider. Depth of cut, lower material, speed of movement, lubrication, pressure applied, sharpness of the endmill etc.
There is a bit of a learning curve involved, but once you find the sweet spot you will know it. Play with the variables for a bit until you find a combination that cuts well and does not chatter. |
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Quoted:
It's tough to go by sound and feel if you've never done it before. A frame of reference takes experience. You have to know what the sound and feel is that produces good results. Until then it's helpful to ask guys who've done it where a good starting point is. That being said, if a guy pays attention to what he's doing he's not likely to screw up a lower beyond salvage, aesthetics aside. In other words, it may not look the best, but it should function just fine. Not really, when milling metal, you will know if something is not going right! 
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Quoted:
It's tough to go by sound and feel if you've never done it before. A frame of reference takes experience. You have to know what the sound and feel is that produces good results. Until then it's helpful to ask guys who've done it where a good starting point is. That being said, if a guy pays attention to what he's doing he's not likely to screw up a lower beyond salvage, aesthetics aside. In other words, it may not look the best, but it should function just fine. First one I did I figured it out real quick. If they're smart they're not going straight for the sides right away so they'll figure out how to dial in the speed and get a feel for it real fast. |
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Quoted:
First one I did I figured it out real quick. If they're smart they're not going straight for the sides right away so they'll figure out how to dial in the speed and get a feel for it real fast. Can't argue with that. I also figured it out real quickly. But the first time is full of unknowns, hence the unsurety and questions. It's kinda like how I was first taught to swim. I was kinda scared of the water until my dad tossed me in the deep end of the pool and I realized that swimming wasn't all that hard. In other words, just do it. You'll figure it out as you go and unless you do something really stupid it will come out just fine. Play with the speed, the bit depth, the way you work the router, you overall technique. You'll figure it out. It's not hard. Just a little bit intimidating. |
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