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Forum topic by goochs posted 02-26-2015 02:22 PM 979 views 0 times favorited 16 replies Add to Favorites Watch
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goochs

56 posts in 689 days


02-26-2015 02:22 PM

anyone know of this profile in a router bit? Either one of these profiles would work.


16 replies so far

View pjones46's profile

pjones46

986 posts in 2102 days


#1 posted 02-27-2015 03:41 PM

Profiles not shown in your post. What are they?

-- Respectfully, Paul

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goochs

56 posts in 689 days


#2 posted 02-27-2015 04:17 PM

sorry here they are

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Cricket

1869 posts in 1052 days


#3 posted 02-27-2015 05:20 PM

(please ignore) testing posting.

-- "Show respect even to people who don’t deserve it, not as a reflection of their character, but as a reflection of yours."

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pjones46

986 posts in 2102 days


#4 posted 02-27-2015 05:39 PM

There is no such router bit that looks like this other than having one made.

Are these shapes what you are trying to cut or are they the bits?

-- Respectfully, Paul

View dawsonbob's profile

dawsonbob

1909 posts in 1215 days


#5 posted 02-27-2015 06:39 PM

Cricket,

I tried to respond to this post yesterday, and it went into an endless loop. Glad you’re on it.

goochs,

Is that a Kirby-Morgan KM-9 the dog is wearing?

-- Mistakes are what pave the road to perfection

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goochs

56 posts in 689 days


#6 posted 02-27-2015 07:19 PM

this shape is what I am trying to cut, I want to create this profile

View dawsonbob's profile

dawsonbob

1909 posts in 1215 days


#7 posted 02-27-2015 07:29 PM

goochs, I don’t think you will find a router bit that would cut that in one pass. I would guess that it could be done with several bits, but even then it would have to be done in at least two passes (run one side, turn it and run the other side). Someone else may know of another way. Good luck.

-- Mistakes are what pave the road to perfection

View mahdee's profile

mahdee

3547 posts in 1227 days


#8 posted 02-27-2015 07:32 PM

I doubt you can find a bit to do that. But thinking how that can be done, I would start out with two haves that have been dado on a table saw at an angle and glued back together.

-- earthartandfoods.com

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pjones46

986 posts in 2102 days


#9 posted 02-27-2015 07:49 PM

Table saw blade at an angle may work but you will have to play with the cutting angle and your fence settings. Use a thicker piece of stock and use a jointer down tto final thickness of profile on the back side.

Cut 1

Cut2

Do all the rounding of edges after the fact and be careful to use push sticks.
Good Luck

-- Respectfully, Paul

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mahdee

3547 posts in 1227 days


#10 posted 02-27-2015 07:54 PM

I think it can be done with one cut on a long piece and then cut that in half?

-- earthartandfoods.com

View goochs's profile

goochs

56 posts in 689 days


#11 posted 02-27-2015 09:21 PM

Grerat Idea, I could use the table saw then I also found a bit call a fingernail bit for the center and probably a bull nose for the corners

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MrUnix

4203 posts in 1658 days


#12 posted 02-27-2015 09:33 PM

this shape is what I am trying to cut, I want to create this profile

Not going to happen using a router.. you would need at the very least a moulder to make the rounded middle section since that shape is impossible to do with a router as far as I know. The router could be used to do the round overs on the sides, and the table saw is a good idea for the internal grooves.

The best you could get with a router would be using something like this:

But that would leave flats on either side. Even with the moulder, it would need the end points ground to a fine point to prevent the flats, which isn’t ideal.. although, you could get some custom ground knives that are similar to a multiple beading knife, with the middle one large surrounded by two smaller ones on either side. Then you would just need to cut the slot under the two side beads.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View skcj213's profile

skcj213

27 posts in 925 days


#13 posted 02-27-2015 09:54 PM

You will not be able to get what you want with a router bit, at least not in one pass. Remember, with a router bit you have to consider that the 2D shape you see will be spinning 360 degrees. In the case of the profiles in post #2 that would leave a flat bottom, not the shape you desire. You will have to make a minimum of 2 passes with a table saw or possible using a slotting router bit at an angle. Then come back and round over the bottom profile as needed.

View DrDirt's profile

DrDirt

4167 posts in 3202 days


#14 posted 02-27-2015 11:24 PM


sorry here they are

- goochs


There is no way a router bit can cut the profile on the bottom.
As the bit spins – that inner ‘corner’ gets cut away by the round tip.

No way to cut convex – - as the blade spins… kind of like a weedeater, it will cut the bottom flat.

like this – - the bottom profile just make a more blunt recess

There is no “Pathway” as the blade plunges in, to leave material “behind” the cutter.

And you will always have a flat bottom, just like a flycutter grinding a cast iron table top. You cam make concave shapes, not convex though.

Pjones46 has teh best approach. cut the grooves, then go back with a roundover bit on the routertable.

-- 'Political correctness is fascism pretending to be manners' ~George Carlin

View bondogaposis's profile

bondogaposis

4020 posts in 1811 days


#15 posted 02-27-2015 11:54 PM

I would make it out of 3 pieces of wood. First cut the center piece on the table saw with the angles like pjones shows. Then I’d make 2 side strips and round over on the router then glue them up.

-- Bondo Gaposis

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