thank you, i fully understand now what thrust bearings are.
i have some of them somewhere, but where.....
i will see if my cheap drilling motor will do the job.
i fear not.
i can perfectly use it with 0,8mm HSS hand drilling (freehand) without breaking.
but you know the hss don't break, they get dull after three holes.
also with freehand drilling there is some damping of vibrations...
but i know this is impossible with carbide...
i would get the bosh grinder here for sure, the bosh equipment is good available.
but i dont want to spend that much (what is au$ / us$ or eur rate?).
there is a vast amount of cheap spindles on the market, dremel like.
all collets i have ever seen here are brass ones. i guess made on a lathe.
but there are also small adjustable drill jucks available.
they are good precision, no scrap, but i fear not good enough for carbide bits.
what do you think about that?
regards
stefan
20.05.2003 05:31:57, Adam Seychell <
adam_seychell@...> wrote:
>Stefan,
>
>http://howstuffworks.lycoszone.com/bearing3.htm
>
>This URL shows the basic idea of the thrust bearing. All I know
>is that the bearing used in car clutches use a thrust type , but
>the ones on clutches are fully enclosed, unlike shown in the
>diagram. These bearings are fairly cheap and widely available.
>You could even use the old clutch bearings which car mechanics
>routinely throw away.
>
>If I get home from work at a reasonable hour today, then I'll try
>make create a quick web page showing the construction of my drill
>press. This drill machine was designed from only cheap common
>materials, except actual drill motor, which I had set be back
>AU$240. See;
>
>http://www.bosch.com.au/productcatalogue/spt3/products/ggs27.htm
>
>After months of searching for a good PCB drill spindle this was
>the cheapest and most practical thing I could find that came with
>precision ground collets. I also had to buy the 1/8" collet for
>use with PCB carbide drill bits.
>
>
>Adam.
>