I can only say one thing in regard to drilling PCBs by hand, why are you using a jobber drill? What is a jobber drill? A jobber drill is meant for drilling deep holes and thus have a lot of flute length.
So, let me introduce you to something known as a Center Drill. These guys are designed to be rigid and not walk which is a perfect application for drilling PCBs.
Essentially you will drill a starter hole and then switch bits to the jobber drill. Most of you will probably be using a #0 or #1 Center Drill. A typical resistor lead is roughly 1/32 in diameter so a #0 should work just fine. Ultimately you should have less broken drills and your production time should be cut enough though you will switching tools. These are fine to use in a drill press for drilling PCBs, they will not walk.
|
Size |
Body Dia (A) |
Drill Dia (D) |
Drill Length (C) |
OAL (L) |
|
00 |
1/8 |
0.025 |
0.030 |
1 1/8 |
|
0 |
1/8 |
1/32 |
0.038 |
1 1/8 |
|
1 |
1/8 |
3/64 |
3/64 |
1 1/4 |
|
2 |
3/16 |
5/64 |
5/64 |
1 7/8 |
|
3 |
1/4 |
7/64 |
7/64 |
2 |
|
4 |
5/16 |
1/8 |
1/8 |
2 1/8 |
|
5 |
7/16 |
3/16 |
3/16 |
2 3/4 |
|
6 |
1/2 |
7/32 |
7/32 |
3 |
|
7 |
5/8 |
1/4 |
1/4 |
3 1/4 |
|
8 |
3/4 |
5/16 |
5/16 |
3 1/2 |