Re:Looking for a specialty bit
2006-04-13 by Len Warner
On Thu, 13 Apr 2006 at 17:28:19 +0100, Leon Heller wrote: >----- Original Message ----- >From: "George Lawrence Storm" <Keencoyote@...> >Sent: Thursday, April 13, 2006 4:46 PM > >A long time ago I once had a specialty bit which was used to create a > > "donut" pad on a copper clad board, it had a pilot/drill and two > > spurs which cut the pad. > > > > I forgot what it is called, can anyone identify it and where I can > > obtain them (preferably in a few sizes)? > >Farnell stocks them, order codes 146411 and 146413. It appears that 146411 makes a 2.5mm counterbore hole, while 146413 makes a 3.5mm counterbore pad. Unfortunately, 146411 availability is "no longer manufactured" and 146413 availability is "out of stock", so I wouldn't be too optimistic. Farnell give the manufacturer as ELDON ENGINEERING but their site http://www.eldoneng.co.uk/ doesn't seem to show them, perhaps they were just importers/agents. Googling PCB1 2.5 or PCB3 PAD 3.5 turns up something, so they may still be available, good luck.