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#1
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What size rounding bit for 3/4" stock?
If I want to create a rounded edge on a piece of 3/4" wood, what size
router bit would I use? I want it to be smooth round, not have that little jag at the top. -jim |
#2
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What size rounding bit for 3/4" stock?
Hi,
I'd use a Staff Bead cutter. In your case a 9.5mm - Trend. SeeAll |
#3
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What size rounding bit for 3/4" stock?
"jtpr" wrote in message oups.com... If I want to create a rounded edge on a piece of 3/4" wood, what size router bit would I use? I want it to be smooth round, not have that little jag at the top. -jim Up to 3/4" radius (to suit your taste). As for the jag, you control whether there is one or not by setting the height of the bit. Jim |
#4
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What size rounding bit for 3/4" stock?
If you mean a half round (3/4" diameter), use a 3/8" radius bit. Duh. The trick is the technique, not the math. If you can attach an auxiliary board to the routed board for the second side, that's the easy solution. In my case, I used a steel straightedge to align my incra fence with the bearing on the bit to within a thou (yay for the micro adjust!) and just routed both sides - the board rubs along the fence at JUST the tangent point, and you end up with an essentially perfect 3/4" half round. |
#5
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What size rounding bit for 3/4" stock?
DJ Delorie wrote: If you mean a half round (3/4" diameter), use a 3/8" radius bit. Duh. The trick is the technique, not the math. If you can attach an auxiliary board to the routed board for the second side, that's the easy solution. In my case, I used a steel straightedge to align my incra fence with the bearing on the bit to within a thou (yay for the micro adjust!) and just routed both sides - the board rubs along the fence at JUST the tangent point, and you end up with an essentially perfect 3/4" half round. Uh huh. Anyting less than 3/8" and you will have to leave a flat spot somewhere on the edge, or that 'jag'. You can use larger radiused bits, then the curved edge may be tangent to either face, with a sharp edge at the other, or tangent to both with a sharp edge in between. A roundover with a 'jag' is called a bead. Draqing the profile on graph paper can help a lot. -- FF |
#6
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What size rounding bit for 3/4" stock?
"jtpr" wrote in message oups.com... If I want to create a rounded edge on a piece of 3/4" wood, what size router bit would I use? I want it to be smooth round, not have that little jag at the top. I like the look of a 3/8" myself. Any size properly adjusted won't leave any marks at the top. You can use a 3/4" also, but that tends to make it look more like a full rounded edge rather than just a nice break of the edge. Depends on what you want as a final result. |
#7
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What size rounding bit for 3/4" stock?
"DJ Delorie" wrote in message ... I used a steel straightedge to align my incra fence with the bearing on the bit to within a thou (yay for the micro adjust!) Change that "thou" to "a little bit and I'll believe you. |
#8
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What size rounding bit for 3/4" stock?
wrote in message oups.com... Uh huh. Anyting less than 3/8" and you will have to leave a flat spot somewhere on the edge, or that 'jag'. Please explain. The only factors I know which will cause a jag are bit height or fence setting relative to the bit. The radius has nothing to do with it. The radius choice is not related to the thickness of the wood, other than cosmetic preference. Bob |
#9
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What size rounding bit for 3/4" stock?
Example at the http://www.patwarner.com/routertable_jointing.html link.
The cutter has a 1/2" radius; the work is 3/4" thick, the fence is offset for a full thickness cut. |
#10
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What size rounding bit for 3/4" stock?
Thanks. But what I want is half that. So the bottom is flat and the
edge curves up to the the top. It will be the top of a tongue drum. I believe the first post was correct with 3/8" (I won't comment on the "duh"...;+}) I guess it is obvious when you think about it. So I went and looked at bits... wow. $30! -jtpr |
#11
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What size rounding bit for 3/4" stock?
BillyBob wrote: wrote in message oups.com... Uh huh. Anyting less than 3/8" and you will have to leave a flat spot somewhere on the edge, or that 'jag'. Please explain. The only factors I know which will cause a jag are bit height or fence setting relative to the bit. The radius has nothing to do with it. The radius choice is not related to the thickness of the wood, other than cosmetic preference. I think you missed the word 'or'. Suppose you roundovah 3/4" stock with a 1/4" bit. Will you not get a flat spot on the arris _OR_ a jag or one or both edges? (Or all three.) -- FF |
#12
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What size rounding bit for 3/4" stock?
"CW" writes: Change that "thou" to "a little bit" and I'll believe you. The dial is marked in 1/1024 inch units, and yes, "off by one" makes the difference between "straightedge rocks" and "straightedge doesn't rock". You do realize that your fingers can feel a 0.001" offset, right? A thou really isn't as small as you think. Besides, that was kinda the whole point of spending over a thousand dollars building an ultra-precise router table. |
#13
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What size rounding bit for 3/4" stock?
The dial is marked in 1/1024 inch units, and yes, "off by one" makes
the difference between "straightedge rocks" and "straightedge doesn't rock". You do realize that your fingers can feel a 0.001" offset, right? A thou really isn't as small as you think. it only takes 16 or so of them to make 1/64" Besides, that was kinda the whole point of spending over a thousand dollars building an ultra-precise router table. I thought that the reason to do that is because you can... |
#15
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What size rounding bit for 3/4" stock?
I've been a machinist and toolmaker for 19 years. I have a pretty good idea
of how big .001" is. Your setup is not ridgid enough to hold it. Nothing on that fence is strait enough to reference. Your adjustment screw probably is accurate (precision screws are pretty easy) but that alone won't get you that kind of precision. "DJ Delorie" wrote in message ... "CW" writes: Change that "thou" to "a little bit" and I'll believe you. The dial is marked in 1/1024 inch units, and yes, "off by one" makes the difference between "straightedge rocks" and "straightedge doesn't rock". You do realize that your fingers can feel a 0.001" offset, right? A thou really isn't as small as you think. Besides, that was kinda the whole point of spending over a thousand dollars building an ultra-precise router table. |
#16
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What size rounding bit for 3/4" stock?
"CW" writes: I've been a machinist and toolmaker for 19 years. I have a pretty good idea of how big .001" is. Your setup is not ridgid enough to hold it. Nothing on that fence is strait enough to reference. Your adjustment screw probably is accurate (precision screws are pretty easy) but that alone won't get you that kind of precision. Have you seen one in person? Besides, I can only speak for my own experience. A thou on the dial is a useful increment for that kind of setup. A thou on the lift is a useful increment there. On my setup, a thou sometimes makes a difference. |
#17
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What size rounding bit for 3/4" stock?
"jtpr" wrote in message oups.com... Thanks. But what I want is half that. So the bottom is flat and the edge curves up to the the top. It will be the top of a tongue drum. I believe the first post was correct with 3/8" (I won't comment on the "duh"...;+}) I guess it is obvious when you think about it. So I went and looked at bits... wow. $30! If you want a 1/4" shank, much cheaper right now http://www.infinitytools.com/products.asp?dept=1045 Still a good price here http://www.routerbits.com/cgi-router...688864_6422+28 Both brands are top quality bits. The 3/8" roundover is one of the most used bits in my shop so I don't mind paying for one that will last a long time. -- Ed http://pages.cthome.net/edhome/ |
#18
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What size rounding bit for 3/4" stock?
"DJ Delorie" wrote in message ... Have you seen one in person? Nope, don't need to. I know what it is made of, I know how it is made, I know what the target customer is and I know the price. Besides, I can only speak for my own experience. A thou on the dial is a useful increment for that kind of setup. A thou on the lift is a useful increment there. On my setup, a thou sometimes makes a difference. Might make a difference but just because you lable it .001 doesn't make it so. Your dealing in "little bits". |
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