1/2" spiral template bit?

[JonathanJung]

Anyone know of a router bit with 1/2" cutting diameter, bottom bearing (template - not flush trim), spiral or even better, compression spiral? I assume it'd need to be 1/4" shank to allow for a 1/2" bearing.

I often run parts over the router table, on top of the pattern, clamped down, so flipping over and using a flush trim isn't an option I don't think. Am looking for the smoothes finish possible, cutting all manner of grains.

 

[JonathanJung]

Best I can find:
https://www.amanatool.com/45460-3ds...2-dia-x-1-x-1-4-inch-shank-with-upper-bb.html

[attachimg=1]

 

[RustE]

Maybe this?
https://www.whitesiderouterbits.com/collections/ultimate-flush-trim-bits/products/udp9112

 

[RustE]

Or maybe one of these, if you can tolerate the second bearing?
https://www.infinitytools.com/mini-mega-flush-trim-bits
https://www.infinitytools.com/double-bearing-pattern-router-bits-3433

 

[Crazyraceguy]

I have the Infinity bits, 3 piece set. One of them has been in my OF1010 since they came in. It has been great. I have used it on birch ply, red oak, poplar and cherry. It has done well on all of them.

 

[AnthonyE]

Why does it need to have a 1/2" cutting diameter?

 

[JonathanJung]

Maybe this?
https://www.whitesiderouterbits.com/collections/ultimate-flush-trim-bits/products/udp9112

That's 7/8" CD

Or maybe one of these, if you can tolerate the second bearing?
https://www.infinitytools.com/mini-mega-flush-trim-bits
https://www.infinitytools.com/double-bearing-pattern-router-bits-3433

Now we're talking! That 1/2" looks good. I'll just leave one with the top bearing removed for templating.

I have the Infinity bits, 3 piece set. One of them has been in my OF1010 since they came in. It has been great. I have used it on birch ply, red oak, poplar and cherry. It has done well on all of them.

Great, I think the 1/2" is what I'll get then.

Why does it need to have a 1/2" cutting diameter?

For getting into tight concave curves.