need 12mm or 15/32" ball end with 1/4" shank

[13brv3]

Greetings,

I'm trying to make some 12mm round cuts in Delrin using a Dewalt router. Life would be simple if I could find a 12mm ball nose end mill that has a reduced shank of 1/4", but I haven't even come close to finding one.

It would seem that all 12mm bits have 12mm shank. I did order a relatively inexpensive one to see if I can turn down the shank in the lathe, but I'm not too optimistic about that.

I've noticed that 15/32" is probably close enough to 12mm, and being SAE, it would probably be easier to find a 1/4" shank version, but no such luck I'm afraid.

Does anyone know where I could buy a 12mm or 15/32" ball nose bit with a 1/4" shaft?

Thanks,
Rusty

[DareBee]

Custom is your option.

[l u k e]

I searched some and couldn't find anything either. The best I could come up with is here>

Harvey Tool > Carbide Miniature End Mills, Diamond End Mills, Carbide Long Flute End Mills, Carbide Long Reach End Mills

http://www.harveytool.com//uploads/c...fq_ball_em.pdf