opposite of a bullnose router bit?

**Evanism** · 2nd January 2015, 04:02 PM

I want to put handles ino the sides a bunch of breadboards with curved edges.

The handles are to curve with the board AND have curved smooth beginnings/ends and I'm seeking a way to use the exact opposite of a bullnose router bit to do so.... but cant find such a thing, for I don't know what its called! I searched Amazon, Amana, Carbatec and Carbitool catalogues for hours... no luck!

4950.jpg

The bit may look something like the picture on the left and the *result* looks like the bit here.

BTW - I'm not wanting to build a jig and put the board side on. Its too dangerous, plus (!!!) each board is unique in shape... Id much rather it simply follows the contours with a bearing if possible.....

Thanks!

**Evanism** · 2nd January 2015, 05:08 PM

Such as used in the 4 minute mark on this video: http://youtu.be/lR9_CjQYZj4

**fubar** · 2nd January 2015, 05:09 PM

Try looking for edge fluting router bits at toolstoday

**snowyskiesau** · 2nd January 2015, 06:19 PM

This is from the Carbitool catalogue, closest thing I could find to what you describe but perhaps too small at 7mm

**skot** · 2nd January 2015, 08:40 PM

You could use a Cove Bit with Ball Bearing but would have to flip the board for a second pass

CMT at Carbatec.......Cove

**Evanism** · 2nd January 2015, 10:11 PM

Originally Posted by skot

You could use a Cove Bit with Ball Bearing but would have to flip the board for a second pass

CMT at Carbatec.......Cove

You know Skot, this did cross my mind. The big hassle I could see is exactly lining up the begin and end as well as getting the height right so the 90 degree bottom doesn't create a gash on the upside down run.

Fubar came terribly close, but they were shallow. If this is all there is, cest les vie, but I wish to persist.

I'm guessing they aren't made because some dope would use it hand held. What a disaster. I'm thinking it's probably a job for a spindle moulder.

**Skew ChiDAMN!!** · 2nd January 2015, 10:18 PM

I don't know of any std. bits that'll do that in one pass...

...but there are a few combinations that'll do it in two or three.

You could possibly use an ogee bit in two passes, once on each side, provided you don't mind the 'trench' having a flattened bottom.

You could use a ball milling bit or a round-nosed bit if it needs to be round-bottomed, then a roundover (or beading or ovolo) bit to blend the curves on each side. (3 passes in total)

**fubar** · 2nd January 2015, 11:55 PM

Ok try internal radius router bit

**pal** · 3rd January 2015, 07:13 AM

Maybe a ball router bit would work http://www.ebay.com.au/itm/Trend-35-...item51c84da0a1

or a core box bit http://www.ebay.com.au/itm/1-2-Shank...item5d4d4cbedb

Regards
Harold

**Handyjack** · 3rd January 2015, 08:10 AM

...or make a drawing and contact Carb-I-Tool for a quote for a one off manufacture.

**mdawson** · 3rd January 2015, 08:25 AM

Originally Posted by Evanism

I want to put handles ino the sides a bunch of breadboards with curved edges.

Hi Evansim,

I think McJing in Sydney have what you're after.

https://mcjing.com.au/categorybrowse...=86#FLUTINGBIT

Or, if you'd like an asymetrical handhold so there's a up and down side on your boards (and your boards are thick enough) you might like this one.

https://mcjing.com.au/categorybrowse...94#HANDRAILBIT
(The second handrail bit down)

Mark D

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