Hi! Thanks for watching. The drill bits I use are a combination. The type are always HSS (high speed steel) twist drill bits. The largest ones are usually from Rio Grande. My mid to small range are metric hss from Travers, and the smallest bits are Gesswein Blue Ribbon. The Blue Ribbon bits are the best I’ve ever found, but very expensive, so I keep them for very fine work on expensive coins. The sizes I use range from a #60 (largest) down to a #80. The smaller the bit, the more fragile. I hardly ever break a #60 anymore- they will wear out before breaking. A #80 is .34mm… very easy to break no matter how skilled you are. When drilling- keep your bit steady and straight. Go slow, back out often and lubricate often. Drill a tiny, tiny bit. Back out, clear the bit and hole of debris and dust. Lubricate the bit, and go back in. Repeat. Use very little pressure and let the bit do the cutting.
At the end you buffed the coin. Did you spend time filing the cut edges and do they really need it? The jewelers saw looked like it left a fairly rough edge. Thanks for posting this.....it was very helpful.
Thanks for checking out the video! The saw blades are actually extremely fine, and they don’t really leave sharp edges or burs. The back side will be a *little* bit rough, as the saw cuts on the downstroke, but not enough to cut or scratch someone. Any kind of polishing or tumbling will smooth it right out. The main reason for polishing is to remove any discoloration from soldering the jump ring, and of course to put a high shine on the coin.
Thanks for checking out the video! There is usually nothing needed after cutting, because the saw blades are so fine. They really don’t leave burs or sharp edges.
Yeah- 5/0 is my most commonly used size, but I use down to an 8/0 for the really detailed pieces. I have some 10/0 blades but have only used them a few times.
thanks for the video. Beautiful work!
Thank you!!
What brand of drill bits do you use? Do they break often? Thanks!
Hi! Thanks for watching. The drill bits I use are a combination. The type are always HSS (high speed steel) twist drill bits. The largest ones are usually from Rio Grande. My mid to small range are metric hss from Travers, and the smallest bits are Gesswein Blue Ribbon. The Blue Ribbon bits are the best I’ve ever found, but very expensive, so I keep them for very fine work on expensive coins.
The sizes I use range from a #60 (largest) down to a #80.
The smaller the bit, the more fragile. I hardly ever break a #60 anymore- they will wear out before breaking. A #80 is .34mm… very easy to break no matter how skilled you are.
When drilling- keep your bit steady and straight. Go slow, back out often and lubricate often. Drill a tiny, tiny bit. Back out, clear the bit and hole of debris and dust. Lubricate the bit, and go back in. Repeat. Use very little pressure and let the bit do the cutting.
At the end you buffed the coin. Did you spend time filing the cut edges and do they really need it? The jewelers saw looked like it left a fairly rough edge. Thanks for posting this.....it was very helpful.
Thanks for checking out the video! The saw blades are actually extremely fine, and they don’t really leave sharp edges or burs. The back side will be a *little* bit rough, as the saw cuts on the downstroke, but not enough to cut or scratch someone. Any kind of polishing or tumbling will smooth it right out. The main reason for polishing is to remove any discoloration from soldering the jump ring, and of course to put a high shine on the coin.
What brand rotary tool do you use
Hey Jon, it’s a Foredom flex shaft.
Very detailed work, what bit are you using after you cut it out to clear it up.
I would assume a dermal bit..
Thanks for checking out the video! There is usually nothing needed after cutting, because the saw blades are so fine. They really don’t leave burs or sharp edges.
What gauge is your blade for the quarter
I’m sorry I didn’t see this comment sooner- I apologize for the delay in responding. The blade is a 5/0.
Should have paid attention to the video, you showed the blade
Yeah- 5/0 is my most commonly used size, but I use down to an 8/0 for the really detailed pieces. I have some 10/0 blades but have only used them a few times.
@@rrlegacy9753 Thanks for the info