>hi!
>
>
>I want now to buy some carbide drill bits now at ebay.
>there is a guy selling used, but sharp, bits. (all customers are very
>satisfied without regrinding them)
>
>i will have to order them soon because he also offers carbide mill blades
>now, this blades look like a circular saw
>blade but have a slightly bigger center hole (22mm). the outer diameter is
>55mm.
>they are made of carbide steel and i think they would be suitable as
>circular saw blade.
>the carbide blade from proxxon costs eur30, these blades are much cheaper.
>sure, i will have to make some kind of adaptor to mount them on a 10mm
>spindle but i think i can do this.
>
>
>but to the drills:
>he sells 100drills for ~eur 20.
>
>so i can take some...
>
>
>but which diameters should i choose?
>until now i used hss drills, because my drilling motors would break the
>carbide (especially at freehand use).
>
>i never drilled 0.6mm, does it make sense to buy them? are many component
>legs suited for this?
>do they break too easily or can i work with them (good motor and pivoting
>press)?
>
>
>i will of course buy some 0.8mm and few 1mm too.
>
>so what do you suggest, which drills use you most?
>which diameters can you recommend to buy and in which number?
>
>he has all standard diameters i think and (and also the ones not so
>standard) so it's hard to choose.
>
>
>thanks for any suggestions.
Stefan
I most often use 0.4, 0.6, 0.8 1 and 1.2 diameters
The 0.4 and 0.6 ones are mostly for vias. So, unless you intend to
create double or multilayer PCB's those small ones are not needed. It
of course may also depends on the method of how you do your through
hole connection.
I don't recomend to buy the circular saw cause there is not too much
space inside the proxxon saw to create an adapter. I agree that it CAN
be done, but question is if it's really worth it. The adapter should
be made of steel and createing one would take ~2 to 3 hours of work. I
then would prefer to buy a regular blade. Besides, such official
blades also pop up on e-bay every now and then.
Markus