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Fivetide
11-01-2015, 10:37 AM
Hi guys 0/

I'm doing some small boxes 110 mm x 66 mm buy 30 mm deep, out of hard wood. I want to give it a nice round over as the boxes will be hand held. But I'm not sure what to use. I have a full router table and looked at the trend bits, the smallest I could find was :

Dimensions:
D=19 mm
C=3/8 inch
C=9.5 mm
B=9.5 mm
B2=12.7 mm
R=1/8 inch
R=3.2 mm
Shank Diameter=8 mm

I think 3.2 Radius might be to large, I'm really only trying to take of the sharp edges but I want it neat and sanding is a bit hit and miss.
Any suggestions on a bit that could work, I don't need it to be self guiding I can set the fence up to guide along.

Five

cropwell
11-01-2015, 10:58 AM
http://www.dremel.com/en-us/Accessories/Pages/SubCategories.aspx?catid=2046

have a look on ebay.

mekanik
11-01-2015, 10:59 AM
Hi Fivetide
Long time no hear.
I got some small bearing guided roundover bits for doing the same job on Spilka spec windows i made for the house. Think i got them from Wealden tools.
Regards
Mike

EddyCurrent
11-01-2015, 11:06 AM
If you can't find a smaller roundover maybe you could use a 45 degree cutter and adjust the fence so it was just skimming the arris.

2.4mm radius
http://www.trenddirectuk.com/mb-06x1-4tc.html

Or you could make your own 'scratch stock' from an old hacksaw blade

JAZZCNC
11-01-2015, 12:42 PM
Just use a portion of the edge of Ogee or Ovolo cutter like Roman ogee or bead ovolo or maybe some other formed tool. It won't give full round over but just breaks the sharp edge.

Fivetide
11-01-2015, 01:14 PM
Hi Fivetide
Long time no hear.
I got some small bearing guided roundover bits for doing the same job on Spilka spec windows i made for the house. Think i got them from Wealden tools.
Regards
Mike

Thanks guys .. as usual excellent advice :)
Yeah Mike been a while .. had to actually go back to work lol .. bummer ! But I've started puting together a new workshop at my dads house.. bought a small metal lathe as a Christmas present still have the Black Cat CNC.. messing as I always do with ideas :)

Eddy , thats the baby ! I'll try and find one on ebay.. :)

Ger21
11-01-2015, 01:16 PM
You can get bearing guided 1/16" roundover bits.

Most major manufacturers make them.

http://www.boschtools.com/Products/Accessories/Pages/BoschAccessoryDetail.aspx?pid=85289M#specs

Fivetide
11-01-2015, 01:19 PM
You can get bearing guided 1/16" roundover bits.

Most major manufacturers make them.

http://www.boschtools.com/Products/Accessories/Pages/BoschAccessoryDetail.aspx?pid=85289M#specs

wow even better , thanks Ger21

mekanik
11-01-2015, 04:02 PM
http://www.ebay.co.uk/itm/1-4-Shank-1-8-Radius-Two-Flutes-Metal-Roundover-Router-Bit-Bearing-Cutter-Tool/301368200947?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%2 6asc%3D20140122125356%26meid%3D48ce5249812c4691861 ee4548c1134cc%26pid%3D100005%26prg%3D2014012212535 6%26rk%3D2%26rkt%3D6%26sd%3D301365517985&rt=nc
GBP 2.93 all the way from sunny China, 1/8" rad just adjust hight and fence so it breaks the corner to your satisfaction.
Mike

racerbear02
12-01-2015, 09:03 PM
OK, I am confused here, not difficult I know but.........

What is the function of the bearing when used on a CNC machine?, surely it is not needed??, not like on a hand held router, or am I missing something here like I usually do??:biggrin:

EddyCurrent
12-01-2015, 09:12 PM
Because the OP said this, "I have a full router table . . . ", so he's not going to use the cnc machine by the sound of it.

racerbear02
12-01-2015, 09:13 PM
OK, so if I wanted to do the same on a CNC, what would I use?

Ger21
12-01-2015, 09:30 PM
A similar bit without a bearing.

Fivetide
12-01-2015, 10:29 PM
Because the OP said this, "I have a full router table . . . ", so he's not going to use the cnc machine by the sound of it.

Correct ! I edging the box afterwards.. far quicker imoa.. ;)

ptjw7uk
13-01-2015, 09:11 AM
English site with the 1/16 bit
http://www.infinitytools.co.uk/router-bits/brass-pilot-bit/

Peter

Fivetide
13-01-2015, 09:29 AM
English site with the 1/16 bit
http://www.infinitytools.co.uk/router-bits/brass-pilot-bit/

Peter

Thats a great post mate thanks.. i'm going to order one to try it out :)

Lee Roberts
13-01-2015, 09:00 PM
OK, so if I wanted to do the same on a CNC, what would I use?
The same cutter but you can take the bearing off via the allen head cap screw (black thing in the pic).

.Me