Yeah, I should keep the broken ones, if for nothing else, to sell
for scrap value. I don't have any means of repointing or even
grinding carbide here. I do have enough grinders I suppose that I
could put a soft wheel or a diamond wheel on somthing though. I
guess I better start saving them!
I have not broken that many bits so far with my hand-drilling on the
big drill press. Most of the times it is from whacking the side of
the bit putting the board in place or something else stupid. Seldom
break them when drilling though.
I have been looking around for some boxes containing lots of the
common sizes I use the most of .025", .035", .045", .055", .062",
and .125". I would guess that 80% of the holes I have drilled so
far are .035" and I did score a set of them.
Chris
--- In Homebrew_PCBs@yahoogroups.com, JanRwl@... wrote:
>
> In a message dated 7/25/2006 6:21:37 A.M. Central Daylight Time,
> lcdpublishing@... writes:
>
> As the subject title says, I am looking for a source of them.
Actually, I
> really don't need a lot of them, I just would like to have enough
to identify
> all the drills I have (or will have) and use.
>
> Most of the bits I have now already have the rings, but some
don't.<<
> Chris! Do I imagine correctly that you will have only one or two
of each
> size, and will hand-mark the ID-rings? Wow! Even my CNC PCB
drill will BUST
> commonly-used sizes often enough that it has proven VERY
> economically-advantageous to buy-in those "reconditioned" boxes of
50 bits (JDR Microdevices,
> etc), ALL of which have properly MARKED rings. You might buy a
box of those, and
> SAVE the rings off busted bits, for re-use. And SAVE the 1/8"
shanks of the
> busted bits! They can be used for regrinding into engraving
bits, braze-on
> "carbide edges" for specials you make, etc.
>
> Yeah, if I had to depend on one or two of "popular sizes" (like
#56, for
> example), I'd be spending 70% of MY time waiting for delivery of
the TWO
> replacements!
>
> I haven't needed a "professionally-did" PCB in so long, I don't
even know if
> they will accept "2X camera-ready" artwork for new work as
always, or now
> will accept ONLY whatever PCB-CAD layout "on-disk"! So, I
haven't asked how
> THEY buy-in their bits. Boxes of 100? How many sizes do they
keep in stock?
> Min. quantity of each size before reorder? Hmmm... I will have
to try to
> remember to ask, next time I need PTH or multi-layer!
>
> Jan Rowland
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>