Countersinking capscrews?

[dantwomey]

Would anyone like to share any interesting and or proven methods of countersinking socket head capscrews?



Regards,
Dan

[mltaunt]

There is a tool made for that purpose. It has a pilot the diameter of the Thru clearance hole and cutting diameter of the clearance hole for the cap screw. A drill press with a depth stop is pretty much mandatory. Check out a machinists cat for details or try Reid.com

[Xray]

If it's a non-critical application, like holding an amp case together, just counter drill with a drill bit of the right size. The fact that the screw head is sitting on a tapered surface won't hurt a thing unless your subjecting the parts to a great deal of force, or you're overtightening into a plastic part.

Another alternative is to start the counterbore with a drill, then finish it with a regular drill bit thats been ground flat on the end. You'll have to be sure to grind some cutting relief on the end of the drill after you remove the point. Just think of the cutting edge, then grind the metal directly behind the edge so it doesn't rub. Don't try to start the counterbore with the flat end drill-it'll jump all over the place.

Buying the correct counterbore, as already mentioned, is the best but they are expensive and hard to sharpen by hand.

Joe

[jackinnj]

they come in all sizes and are inexpensive.

[Peter Daniel]

Here'a a good explanation how to do it:
http://www.diyaudio.com/forums/showt...5896#post45896

[dantwomey]

Once again, my sincere thanks to Mr. Daniel.

Regards,
Dan

[EC8010]

Can I make a suggestion about photographs?

Your have three items of interest, widely spaced on a complex background. Unfortunately, this is really hard work for compression algorithms, because you have inadvertently included lots of useless information (the background). If you put your interesting bits close together, on a clean white background (I use cartridge paper), you will get a much better result.