0.8 burr cup in conjunction with a Foredom?

[silver70]

Hi all,

Wondering if you could help. I am looking to purchase a burr cup in 0.8 to round the ends of ear studs. I want to use it in conjunction with my Foredom.

Would either of these be suitable as I know the shank needs to be a certain size but can't work out the inches conversion.

http://www.cooksongold.com/category_...0.8mm+cup+burr

Thanks in advance.

[ps_bond]

The standard shank size for our needs is 3/32" or 2.35mm (close enough).

[Patstone]

I use a 1mm burr for all of mine, even the 0.80mm wire.

[silver70]

Thanks for that advice.

Patstone - can I ask why? Is there any greater advantage to this?

Many thanks

[mizgeorge]

Cup burrs are measured by their outer diameter, so if you're wanting to round off 0.8mm wire, you'll have a problem, as you actually need a 1.2mm cup.

Twincut versions do a better job as they actually clear the swarf as you work - the regular ones clog very quickly, and can blunt just as fast.

You'll usually still need to finish off with a fine file, emery board or micromesh to be absolutely sure they're completely smooth, and watch out for cut marks from the edge of the cup.

[Patstone]

I don't use mine much,prefer the hand finish.

[silver70]

Thanks for this advice Mizgeorge.

Patstone - do you use a hand held cup burr then or do you just shape by sanding?

[Dennis]

You might consider a medium silicone wheel, as a cheaper option. They will also finish the edges of sheet, and when they need re- shaping they can be run on any diamond covered tool you happen to have.

http://www.cooksongold.com/category_...ilicone+wheels

[caroleallen]

I just use a roll sander for mine.

[silver70]

Thanks Dennis - I think I have one of these in my kit I got with the foredom - I will dig it out.

Carole - newbie question - what is a roll sander?

Thanks