Do you think the dentist drill will have room to accommodate the larger collet?
They do sell air powered straight grinders that will take 1/8th shanks
and run at pretty high RPM.
ST
P.S.: That always reminds me of a travel documentary I saw about
Pakistan, the presenter went to a dentist on a market there.
The dentist had this drill:
<
http://www.electronicsweekly.com/blogs/engineering-design-problems/DSCF0003.jpg>
When the presenter asked where he had studied dentistry he said "this
shop belonged to my uncle, and now I am the dentist".
On Tue, Feb 5, 2013 at 8:21 AM, Tony Smith <ajsmith1968@...> wrote:
>> Dentist bits are 1/16". PCB drill bit shanks are 1/8". So you have to
> insert a 1/8"
>> diameter shank into a 1/16" hole. Does the ER collet accommodate this?
>
>
> You can't mix & match sizes, 1/16th bits in 1/16th collets, and 1/8th bits
> in 1/8th collets.
>
> Seems obvious, but using the wrong size means it doesn't grip properly.
> Damages the collet too. ER16 goes down to 1/32th, IIRC.
>
> You can use a 1/16th bit in a 1/8th collect (dentist bit in a Dremel) by
> slipping a piece of tube (maybe with a slit in it) over the bit to make up
> the different, that's what 'Boot's was referring to as the reducer, though I
> think he missed you're going the opposite way.
>
> The only way to use 1/8th bits in a dentist handset is to replace the
> collet. Someone with a lathe could make one for you easily enough, boring
> out an existing collet to 1/8th might be possible, but they're usually
> hardened. Well, good ones are.
>
> You can get what's called an 'emergency collet', basically a blank you drill
> out to the correct size.
>
> Tony
>
>