Homebrew PCBs

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]
>