As suggested, the little air powered grinders run about 55,000 RPM and they
only cost about $20 from Harbor Freight.
A lot of years ago I used the turbine from a dental handpiece and diamond
tipped burs to build a microscopic sized custom milling machine to mill the
outside edges of PCB. The PCBs where only 3x3mm (yes, mm) and only 0.2mm
thick. Amazing speed: 350,000 RPM.
Bertho
From: Stefan Trethan Sent: Tuesday, February 05, 2013 03:20
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".
[Non-text portions of this message have been removed]
only cost about $20 from Harbor Freight.
A lot of years ago I used the turbine from a dental handpiece and diamond
tipped burs to build a microscopic sized custom milling machine to mill the
outside edges of PCB. The PCBs where only 3x3mm (yes, mm) and only 0.2mm
thick. Amazing speed: 350,000 RPM.
Bertho
From: Stefan Trethan Sent: Tuesday, February 05, 2013 03:20
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".
[Non-text portions of this message have been removed]