Mechanical Drilling PCB

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Mechanical Drilling PCB

Venture is the best solution for those who seek to have a strong mechanical drilling PCB. Venture is the most recommended manufacturer and fabricator of mechanical drilling PCB. We have an effective and durable mechanical drilling PCB that is made of high-grade and strong materials.

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Venture mechanical drilling PCB is the most preferable PCB because it offers extra strength and unique features. It is suitable in a lot of applications. Venture is an outstanding fabricator that can support your mechanical drilling PCB needs.

Your Leading Mechanical Drilling PCB Manufacturer in China

The venture is a famous manufacturer and supplier of Mechanical Drilling PCB in China. We provide a high-end and strong Mechanical Drilling PCB to our valuable customers. Venture mechanical drilling PCB is one of the most in-demand products on the market due to its unique characteristics.

Mechanical Drilling PCB

Venture mechanical drilling PCB is best for different electronic devices. It also can be used for internal electrical interconnection or used as a positioning hole to assemble components. In terms of its functions, Venture mechanical drilling PCB has a reliable and outstanding function for every operation.

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Mechanical Drilling PCB

Aside from mechanical drilling PCB we also can fabricate and customize with the different kinds of PCB including Multilayer PCB, Thick Copper PCB, Ceramic PCB, Inverter PCB, Bluetooth PCB, hard disk PCB, high current PCB, and many more.

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Mechanical Drilling PCB

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Please feel free to contact us for more details, we will send you back immediately!

Mechanical Drilling PCB: The Ultimate FAQ Guide

In this guide, you will find all information you need to know about mechanical drilling PCB.

Whether you want to know how the process works, choosing drill bit, lifespan, safety or cost of PCB drilling, you will find all information right here.

So, keep reading to learn more.

What Is Mechanical Drilling PCB?

Mechanical drilling in a PCB is the rotation of a bit tool which cuts through the laminate materials of bare PCB boards.

The bit being used is made of a micro grain carbide thus enabling the drill to be used for many repetitions and they can be sharpened for a reuse.

Mechanical drilling of the PCB is usually carried out to aid in the placement of components and electrical nets interconnection among the PCBs’ various layers.

With mechanical drilling, there is guaranteed high improved levels of accuracy, low temperature and deformation.

Mechanical Drilling Of PCB

Mechanical Drilling Of PCB

What Are The Advantages Of Mechanical Drilling PCB?

  • Using the drill bit in mechanical drilling, it creates high quality holes in the PCB that are consistent irrespective of their number.

The holes, they neither contain tapers at their ends nor bevels where they can passes through substrates.

The edge of the hole on the surface, is normally having a finish that is sharp.

  • Compared to other drilling methods, mechanical drilling is a fast drilling method for having holes created on a PCB.

Being the fastest drilling method in PCBs’, it allows for improved quantity output during production.

Mechanical Drilling Is A fast Drilling Method

Mechanical Drilling Is A fast Drilling Method

Are There Limitations Of Mechanical Drilling PCB?

Yes, there are limitations of the mechanical drilling PCB.

Some of the limitations of the drilling technique include the following;

  • Drill bit size limit.

Having a narrow drill in the multiple layers of the circuit boards needs a narrow or thin drill bit that is highly vulnerable to breakage.

This is much evident in printed circuit boards that poses high densities hence requiring bit holes of 0.008 inches in diameter.

  • After the drill bit withdrawal, the technique leaves behind copper elevated ends.

This is a disadvantage of mechanical drilling as to remove the elevated copper ends, a process known as deburring has to be performed.

The deburring process takes longer according to the number of holes in the printed circuit board.

  • More costly

The drilling method is expensive and it requires a lot of steps in preprocessing and post processing thus consuming more time.

For the drill bits, they need specialized selection and other preparations such sharpening and proper set up before the drilling process.

For instance, multiple holes with varying diameters are to be drilled, then the drilling machine should be tool changed for each specific hole.

If manually handled, the entire process is not only going to consume a lot of time but also it is going to increase the error probability.

How Does Mechanical Drilling PCB Compare To Laser Drilling PCB?

Here are some of the fundamental aspects you need to know about mechanical and laser drilling PCB:

Laser drilling

This is a type of drilling process that creates holes that are precise on a PCB thus enabling connections between the different layers.

Even with dealing with the smallest sizes, laser drilling ensures high levels of accuracy.


The process purely depends on a machine that is stationary which uses a density that is high for it to ablate a hole into the printed circuit board.

Depending on the type of material being cut, there are different types of lasers the common ones being the CO2 and the UV.

A UV Laser Drilling Machine

A UV Laser Drilling Machine


To drill, a stationery laser beam that uses high power density to vaporize or melt material is used.


The following are some of the benefits of the laser drilling process;

  • Laser drilling has high aspect ratio.

This is the ratio between the diameter of the hole and the drilled depth of the hole.

In laser drilling, a hole with small diameter is achieved thus developing a high aspect ratio.

  • Precise control

The beam intensity, output of heat, laser beam duration can be controlled.

Through taking care of the above, a high level of accuracy is achieved and different hole shapes are created.

  • There is contact process

The damage that is induced on the material by drilling vibration is done away with.

  • Laser machines can perform multi-tasking

The laser machines can be used for other functions like welding and cutting.

  • Holes are drilled at shallow angles, the drilling technique is suitable when it comes in the drilling of holes at an angle with the work piece surface.

Very small angles as low as 10° with the work piece surface can be drilled.

  • Accuracy and speed

Since it is already automated, the method is accurate and so fast.


The following are some of the limitations of the laser drilling process;

When it comes to accurate depth control, it is difficult unless there is a layer of a metal stop.

The process usually carbonizes the areas it cuts thus leaving a burnt or an appearance that is dark and it can also lead to micro cracks.

The process requires a higher initial capital to purchase the laser drilling machine.

Which Tools And Equipment Will You Use During Mechanical Drilling PCB?

During mechanical drilling of a PCB, the following tools and equipment are used;

Drill bits

This is a circuit board drill bit that has a point that is sharp on one end and a flat face.

The circuit board drill bit is used to create holes where wires are inserted band soldered in place thereafter.

To efficiently use the circuit board drill bit, you should ensure that the flat face has been firmly held on to the surface to prevent any movement in any direction.

Firmly holding the flat surface against the surface, ensures that the holes have on the PCB have been drilled at right angles.

 PCB Drill Bit Set

PCB Drill Bit Set

The PCB hand drill

With this type of drill, it has a chuck that is part of the hand drill which functions by holding the drill bit in place.

To tighten the chuck on the hand drill, you ought to use an Allen wrench or an Allen key.

A PCB Hand Drill

A PCB Hand Drill

The back drill PCB

This is also a designed driller that is used to make holes on the printed circuit board.

The holes made are used for wire insertion, soldering and component or component leads into the holes by hand.

To expose the copper layer in the PCB surface, it is cut using a blade and then the exposed copper is removed using a burr cutter.

Once that is done, the back drill PCCB is now fitted with components and electrically connected to its power supply circuit board.

How Does Mechanical Drilling PCB Work?

Mechanical drilling works basically by rotating a bit tool to cut through the different type of the printed circuit board laminate materials.

The drill bit is made up of micro grain carbide which allows it to be used for numerous repetitions.

The drill bits also undergo sharpening thus making them to be reused with a maximum number being thrice.

Sharpening The Drill Bits Is Important For The Operation Of Mechanical Drill

Sharpening The Drill Bits Is Important For The Operation Of Mechanical Drill

Is Mechanical Drilling PCB Suitable For Micro Holes?

Yes, mechanical drilling is suitable for micro holes.

Mechanical drilling for micro holes has a series of advantages like the hole being of good consistency and a higher efficiency.

How Does Mechanical Cutting PCB And Mechanical Drilling PCB Compare?

Mechanical cutting PCB involves you cutting the desired sizes of the PCB materials which you will engage in works you need.

Unlike the mechanical drilling PCB where drill bits are used to make holes in the PCB.

What Are The Safety Precautions During Mechanical Drilling PCB?

During mechanical drilling PCB, the following are safety precautions that should be always observed for a better experience;

The drill bit being used should to drill the PCB should be properly selected to meet the desired hole diameters.

You should always use the right cutting fluid for the material that has to be drilled.

You should use the right revolutions per minute for the diameter of the drill bits and the materials.

During working, the work should always be held on a clamp or a vise to the drill table.

Chips at the surface of work should always be removed with a brush and not by hand.

When the drill has started to breakthrough on the bottom of the PCB, you should always ease on the drilling pressure that had been applied initially.

Before drilling, the drill should be inspected just to ensure that it is not broken, cracked or having any issue that can affect the drilling process.

During drilling, you should not use so much pressure but some gentle reasonable pressure.

Before mounting, you should always clean the drink shank or the drill sleeve.

The power should be switched before the trying to loosen up the drill chuck.

The machine should never be cleaned while it is still running, it has to stop for it to be cleaned.

Taper shank tools should never be placed in a drill chuck, large diameter drills is an example of the taper shank tools.

The straight shank tools like the standard drills are the only ones that can be put and clamped in the chunks.

To remove the taper shank tools from the sleeve, a hammer and a drill drift should be used.

To prevent damage of the taper shank drill or the drill chuck in case they fall on to the table, the drill spindle should be lowered down during their release.

In the event the drill binds in the hole, the machine should be stopped and the spindle turned backwards with a hand to release the bit.

When deep holes are being drilled, the drill bit should be withdrawn frequently in order to clear chips and also bit lubrication.

After using the drill chuck key, always remove it from the spindle immediately.

It important to always have a proper safety eye protection during drilling.

The spindle should always stop by itself when the power has been turned off, you should not stop by the use of your own hands.

Always Follow Safety precautions When Using A Drilling Machine

Always Be Mindful Of The Safety precautions When using A Drill

How Do You Determine Cost Of Mechanical Drilling PCB?

The cost of mechanical drilling PCB is determined by the following aspects;

Type Of Material In The PCB

The material that has been used in the circuit board is going to have an effect on the cost of mechanical drilling.

The PCBs’ Drill Sizes

The drill size of the PCB and the panel are crucial when it comes with determining the cost of the mechanical drilling PCB.

The size of the board is often determined by the number of circuits which are required for the corresponding devices.

This means that the larger the board size which means that it will require more holes being drilled, the higher the cost.

The PCB Layers

When it comes to mechanical drilling PCB, the number of layers is a factor that determines it cost.

The cost increases as the number of the layers on the PCB to be drilled increases, for instance, a drilled three layer PCB is more costly than a single layered PCB.

Also, when the PCB is layers are thicker than the standard PCB, it directly affects its cost as they need more work as compared to the standard layered ones.

The PCBs’ Surface Finish

After drilling has been done, the surface finishes also determine the cost of the process.

The better the drill finishes, the higher the cost and the vice versa is true.

What Determines Lifespan Of Mechanical Drill For PCB?

The following aspects do determine the lifespan of mechanical drill PCB.

The Properties Of The Work Piece Material

When there is an increase in the forces, hardness on the work piece, power consumption, it illustrates that the chances of the tools to wear are increased.

By the chances of the tool to wear out, it means that its tool life has decreased hence its lifespan.

Moreover, an increase in the ductility of the work piece will see the tool wear off faster as the material becomes so hard to drill thus reducing its life expectancy.

The Geometry Of The Tool

In the case where the tools geometry has changed like an increase in the rake angle, the lifespan of the tool is going to increase.

The opposite, when the rake angle has reduced, the lifespan of the tool will be going to reduce.

Cutting Fluid

During machining, the cutting fluid should always be used more often since it acts as a lubricant in the friction zones thus enhancing a better performance of the machine.

Also, the cutting fluid is used to drive away more heat during the drilling processes.

When the cutting fluid is used in the machining processes, it improves the lifespan of the machine by around 25% to 40%.

Therefore, a cutting fluid should always be used to increase the lifespan of the drill.

The Process Parameters

The process parameters are basically the depth of drill, the speed of cutting and the feed.

Depending on the speed and the depth of drills that are frequently used, they determine the lifespan of the mechanical drill for PCB.

What Is Aspect Ration In PCB Drilling?

This is a ratio between the hole’s drilled depth and the hole’s diameter which includes the ability of efficiently plating copper inside the holes.

How Can You Classify Drilled Holes In PCB?

Drilled holes in PCB can be classified as follows;

The Non-plated Through Holes


These holes are normally used to make sure that the components installed components which required mechanical support are in place.

Mounting holes

The mounting holes are mostly used for the fasteners during installations where the vertical clearance is not a concern.

The countersink holes

These are non-plated through holes which are used in the board mounting where the head of the bolt should be lowered below the surface.

Plated Sit Through Holes

Press fit

These holes fit leads of the through hole components thus making them not to need a fill or a solder.

Through-hole vias

These type of holes are used for routing traces from the top all the way to the bottom.

The conductors can be used to route signals between the layers as they may be required.

Blind vias

It provides a connection which is electrical between the internal layer and the surface layer of the stackup.

The blind vias only extends to the targeted areas.

Buried vias

These are connections between the internal layers which do not extend to either the bottom or top surfaces.

An Image Showing Plated And Non Plated Through Hole

 An Image Showing plated And Non Plated Through Hole

Why Is Design for Manufacturability (DFM) Critical In Mechanical Drilling PCB?

The design for manufacturability is critical in mechanical drilling PCB because it ensures the highest quality standards in the manufacturing of boards.

It offers a series of important elements that should be adhered to in order to achieve the best of the best boards in matters of standard quality.

Which Types Of Vias Holes Can You Drill In PCB?

The following are types of vias holes that can be drilled in PCB;


It is a standard via that goes all along the entire board layer of the stackup from the top to the bottom.

They have the ability to connect to the planes or traces of numerous internal layers as they may be required.


They start and stop on the internal board layers without reaching the external layers.

The structures are much useful in the high density interconnect circuit boards but they are so much costly when it comes to fabricating.

Their shorter barrels also help in improving the signal integrity of high speed transmission lines.


This type of vias starts on the external layer and only goes partway through the board.


With this type of hole, it has a smaller size since it is drilled with a laser.

These type of holes are normally two layers deep as it is difficult to plate smaller holes.

 All These Types Of Via Holes can Be Drilled Into A PCB

All These Type Of Via Holes Can Be Drilled On A PCB

Why Is Numerical Controlled Machines Best For Mechanical Drilling PCB?

Numerical controlled machines are best for mechanial drilling PCB due to the following reasons;

The numerical controlled machines can run for long hours of upto a whole day without any problem.

Time taken to perform to task on this type of machines is less thus many tasks an be done within a short period of time.

Using the numerial controlled machines delivers accurate work unlike the manual machines which often cause some errors.

Incase of change, the changes are made easily thus reducing reducing delays in time.

It saves on costs nand resources since the number of personnel required to operate the machine are few.

With short time frames, the machines are able to develop complex designs which are free from possible errors.

There is uniformity in designs.

The machines have low maintenance.

The numerical controlled machines are very much reliable.

How Can You Avoid Tolerance Errors During Mechanical Drilling PCB?

Tolerance errors during mechanical drilling PB can be done away through;

Having different sizes of hole diameters

In the event the board is having a greater number of drills of the same diameter all it, it forces the drill bits to change in the middle of drilling.

A great practice is to decrease the number of holes for one size and have more with different sizes.

You should avoid using the buried and blind vias

If the two are not a requirement for high density design or high speed circuitry, then they should not be used thus reducing the tolerance errors.

Is There Recommended Drill Size For Mechanical Drilling PCB Process?

Yes, there is a recommended drill size for mechanical drilling PCB process.

The size should be 6 mils thick, the preference being 8 mils.

What Determine Tooling Cost In Mechanical Drilling PCB?

What determines the tooling cost in mechanical drilling PCB is;

The thickness of the boards.

The number of drills to be made.

The different diameters that are to be drilled on the printed circuit board.

The number of layers on which are to be drilled on the circuit board.

How Can You Avoid Errors During Mechanical Drilling PCB?

Errors can be avoided in the following ways;

Having pilot holes for proper drilling to ensure that the drill bit starts in one location and ends in the same place without moving in an unintended direction.

When drilling at an angle, you should make sure to use a straight drill bit.

You should ensure you are using the correct sized drill bit for the right hole in the board.

For all your PCB fabrication including PCB assembly and mechanical drilling PCB, contact Venture Electronics now.

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