PCB drill are mainly used in PCB manufacturing: (PCB, printed circuit board) printed circuit board, which is bonded by several layers of resin materials, and the inner part uses copper foil for wiring. There are 4, 6 and 8 layers. Drilling accounts for 30-40% of the cost of PCB. Special equipment and drills are often needed for mass production. Good PCB bit is made of high quality cemented carbide, which has high rigidity, high hole position accuracy, good hole wall quality and long service life. It has it standard drill size.
Number drill size #88 to #44 data sheet
|
Drill No. |
Size(Inches) |
Size |
|
44# |
0.0860’’ |
2.1844mm |
|
45# |
0.0820” |
2.0828mm |
|
46# |
0.0810” |
2.0575mm |
|
47# |
0.0785” |
1.9939mm |
|
48# |
0.0790” |
2.0066mm |
|
49# |
0.0730” |
1.8542mm |
|
50# |
0.0700” |
1.778mm |
|
51# |
0.0670” |
1.7018mm |
|
52# |
0.0635” |
1.6129mm |
|
53# |
0.0595” |
1.3208mm |
|
54# |
0.0550” |
1.397mm |
|
55# |
0.0520” |
1.3208mm |
|
56# |
0.0465” |
1.1811mm |
|
57# |
0.0430” |
1.0922mm |
|
58# |
0.0420” |
1.0668mm |
|
59# |
0.0410” |
1.0414mm |
|
60# |
0.0400” |
1.016mm |
|
61# |
0.0390” |
0.9906mm |
|
62# |
0.0380” |
0.9652mm |
|
63# |
0.0370” |
0.9398mm |
|
64# |
0.0360” |
0.9914mm |
|
65# |
0.0350” |
0.889mm |
|
66# |
0.0330” |
0.8382mm |
|
67# |
0.0320” |
0.8128mm |
|
68# |
0.0310” |
0.7874mm |
|
69# |
0.0292” |
0.7416mm |
|
70# |
0.0280” |
0.7112mm |
|
71# |
0.0260” |
0.6604mm |
|
72# |
0.0250” |
0.635mm |
|
73# |
0.0240’’ |
0.6096mm |
|
74# |
0.0225” |
0.5715mm |
|
75# |
0.0210” |
0.5334mm |
|
76# |
0.0200” |
0.508mm |
|
77# |
0.0180” |
0.4572mm |
|
78# |
0.0160” |
0.4064mm |
|
79# |
0.0145” |
0.3683mm |
|
80# |
0.0135” |
0.3429mm |
