What size are PCB mounting holes?

What size are PCB mounting holes?

Although there is no fixed hole size that must be used, there is a definable range of standard PCB drill hole sizes to guide your selection. By choosing a hole size between 5 mil (0.13 mm) to 20 mil (0.51 mm), your CM should be able to accommodate your design, although the smaller sizes may cost more.

What is the diameter of an i drill bit?

Letter Drill Sizes

Drill Inch mm
G 0.261 6.63
H 0.266 6.76
I 0.272 6.91
J 0.277 7.04

What is PCB drilling?

PCB drilling, or printed circuit board drilling, is the process of creating holes, slots, and other cavities into an electronic circuit board before soldering/mounting components onto it. It is typically done by using a PCB drill bit (an automated machine) that is slightly smaller than the components placed on it.

How do you calculate via size in PCB?

Your vias are critical for accessing the inner layers in a multi-layer PCB….Via Sizing Calculations and Charts

  1. Minimum hole size = Maximum lead diameter + 0.25 mm (Level)
  2. Minimum hole size = Maximum lead diameter + 0.20 mm (Level B)
  3. Minimum hole size = Maximum lead diameter + 0.15 mm (Level C)

How to choose the best drill bits?

Drill bit material: HSS or tungsten carbide

  • The fit: will depend on the machine used.
  • Diameter
  • Drill bit type: twist,step,reamer,center,conical,insert
  • Drill bit coating
  • Bit angle
  • Bit length (short or long)
  • How to drill a PCB?

    The AR should be kept low to prevent drill wear.

  • The higher the number of separate drill sizes in a PCB design,the higher the drill bits you have to implement.
  • Verify whether the non-plated drills have connections.
  • Check the drill count/size between the drill file and fabrication print.
  • Confirm whether the drill type is a PTH or NPTH.
  • Where to get quality drill bits?

    Best Overall: DEWALT DW1361 Titanium Pilot Point Drill Bit Set.

  • Drill Hog 2.29 Pc Cobalt Drill Bit Set M42 HSS 29pc USA Drills.
  • Best Value: Tooluxe 10171L 13-Piece Titanium Drill Bit Set.
  • DEWALT DW1354 Brad-Point Drill Bits.
  • Irwin Tools 3018002 Cobalt Metal Drill Bit Set.
  • Tooluxe 10055L Titanium Coated Hex Shank Drill Bits.
  • What are the types of drill bits?

    Twist Drill Bits. When it comes to drilling holes,today’s tools include twist and thick drills.

  • Brad Point Drill Bits. When you need to drill small,precise holes,you’ll want to use a brad point bit.
  • Flat Drill.
  • Straight Fluted Drill.
  • Countersinking Drill.
  • Counter Boring Drill.
  • Oil Hole or Tube Drill.
  • Spirec Drill.
  • Plug Cutter.
  • Tile Bits.