Your Expert Countersink PCB Manufacturer

PCBMay- Your Professional Countersink PCB Manufacturer and Supplier in China

With over 10 years of expertise, we are one of China’s top manufacturers and suppliers. We can be your one-stop supplier, and you can guarantee a stress-free purchasing experience. We can manufacture Countersink PCBs all across the world. PCBMay is the best choice for your PCB requirements!

A countersink makes a conical hole that matches the angle of the screw, such that when the screw is fully engaged, the head sits flush or slightly below the surface. You can rely on PCBMay if you’re seeking a reputable Countersink circuit board manufacturer in China. 

Countersink PCBs from PCBMay are available in a wide range. We offer automotive PCB, aluminum PCB, professional countersink PCB, LED countersink PCB, multilayer PCB, countersink holes PCB, high-quality countersink PCB, and other PCBs.

Our engineers are competent in PCB layout, PCB assembly, development, and production of PCBMay Countersink PCBs. PCBMay is a specialist in all aspects of Countersink PCB component supply and manufacture. Furthermore, when producing items, we strictly comply with all rules and standards.

PCBMay provides Countersink PCB delivery globally. We receive a lot of great feedback from our customers, both online and offline, and they are always satisfied with our quality; we have the best technical staff to ensure that you get adequate service.

Select PCBMay as your supplier for your business or project. We commit to supplying our clients with the most delicate quality Countersink printed circuit board. It is offered with a low MOQ and at an affordable price. Furthermore, PCBMay guarantees on-time delivery.

Our strict quality control staff performs in-line checks to reassure customers about the product performance. All PCBMay products are compliant with ISO14000, ISO9001, UL, REACH, RoHS, CE, and other industry standards.

You may get your Countersink PCB at the lowest price. Would you please email us your feedback and questions regarding the PCB specification? We will reply immediately to your needs and ensure the safety of your shipment.

Please do not hesitate to contact us!

Countersink PCB: The Ultimate FAQ Guide

Are you worried about drill holes on the PCB surface?

Countersinking superbly handles this issue. Countersink PCB develops the use of PCB drill holes and screws. Its superior features and immense positive sides improve the functionality of PCB applications.

PCBMay is the perfect option for countersink PCB requirements. Here, we are going to explain the pros and cons of this circuit board with proper detailing. We hope this FAQ guide will enrich you with PCB countersink holes. Let’s make a move.

What Is A Countersink PCB?

Countersink PCB holes are conical-shaped drilled holes cut to the PCB laminate. These holes are used in allowing the utilization of fasteners and flat head screws. Countersink holes usually act to sit screw heads on the lower or upper part of the printed circuit board.

It improves the appearance of the circuit boards. There are different hole angles in PCB countersinking. So, it has versatile applications in the electronics sector. Its symbol looks like the English letter “V”. It does not allow drilling straight to the PCB materials.

PCB Countersink Hole

The depth of these holes varies due to some reasons. Deep PCB holes ensure easier covering of the flatheads through the plugs. Again, its holding strength is enough to promote the effectiveness of electronic gadgets that have space restraints.

What Is The Difference Between A Counterbore And Countersink In A PCB?

Countersink and counterbore are two types of drilled hole cutting on the PCB laminate. Though these holes have multiple similarities, they also consist of distinguishing properties. Now, we are here to clear your concept about these two PCB drilled hole types.

Hole Shape

The typical shape of a countersink hole is conical. That’s why its symbol is “V”. In contrast, PCB counterbore holes are cylindrical, and their symbol is “T”

Hole Angles

PCB countersink holes have a wide-scale of hole angles. Its typical angles are 82⁰, 90⁰, and 100⁰. Besides, 60⁰, 110⁰, 120⁰, etc angles are also available in the countersinking mechanism.

On the contrary, counterbore holes have a limited angle. Its hole angle is only vertical 0⁰.

Applications

Countersink holes are highly effective for high-density PCB applications. Such as mobile phones, laptops, and other wearable electronic appliances. Countersinking makes the component’s placement easier due to the ability to make additional space on the PCB laminate.

But, counterbore that makes flat-bottomed holes are used in washers and various 6-headed screws and caps.

Space Management

Countersink provides a better facility in space management on the PCB laminate compared to counterbore holes. Its secure and tight fittings allow the PCB manufacturer to arrange the components properly.

Smoothness

Countersink holes render a smooth PCB surface. Besides, these drilled holes don’t cause any interference during the PCB design. But, counterbore holes are not suitable for having an impressive outlooking of the PCB laminate.

Countersink Vs Counterbore Holes On a PCB

Dimensions

Dimensioning refers to hole size, surface types, materials, etc. Unlike counterbore holes, the angular sides lie in the corner portion in the case of countersink holes.

The required dimensions of PCB countersink holes are angles, surface diameter, depth of counter drill holes, etc.

On the other hand, diameter, corner radius, depth, etc are dimensions of PCB counterbore holes.

Strength

Counterbore holes have a high holding strength because of their shape. Here, the applied force impacts the parallel segment of the screw hole axis. But, the force gets dispersed due to the conical shape in the case of countersink holes.

That’s why countersink PCB holes have comparatively lesser holding strength. But, these holes can deliver sufficient strength that is required for a top-class printed circuit board.

Now, it is clear that countersink PCBs are more advanced than counterbore holes in many aspects.

What Are The Features Of Holes LED Countersink PCB?

Holes LED countersink PCBs have multiple worthwhile features. That’s why these circuit boards are compatible with advanced electronic devices. The most noteworthy features of these PCBs include-

• IPC-A 600F quality standard
• Board thickness is 0.2mm to 0.4mm.
• Decomposition temperature is around 270⁰C.
• High TG (Glass Transition Temperature)
• Moisture resistant
• Low relative permittivity
• Low CTE
• Copper thickness varies from 2 oz to 6 oz.
• Cost-effective

LED Countersink PCB Feature

What Is The Purpose Of The Countersink?

Countersinking is an effective way to enhance the effectiveness of PCB components. Its main purpose is to make sure that flat-shaped head screws can sit flash on the piece of work.

Countersink delivers a wide range of angles. Its most common angles are 60°, 82°, and 90°. It creates a conical hole that fulfills the requirement of matching with a screw angle. That’s why head screws are able to sit flush. Sometimes, these screws sit a little bit lower in position to the surface.

Countersink PCB Hole Angles

So, countersink holes improve the PCB performance to a large extent.

Which Materials Are Used In Professional Countersink PCB Construction?

Professional countersink PCBs are the best choice for top-class electronic applications. The construction materials have positive impacts on PCB performance. Usually, FR-4 materials are used as the base material of this PCB.

FR-4 materials are highly effective for dielectric properties, temperature controls, impedance stability, etc. Besides, multilayer PCB projects support countersink holes. Here, FR-4 also ensures high thermal conduction between different PCB layers.

Countersink PCB Materials

Besides, composite epoxy materials (CEM-1) are used in manufacturing a countersink professional PCB.

What Are The Different Countersink PCB Types?

Countersink PCBs are found in a wide range. All of its types are supremely functional and durable enough to significantly develop the project’s performance. Usually, its categories are based on materials, surface finishes, use, etc.

The most significant types of this PCB are-

• Automotive countersink PCB
• Gold plating countersink PCB
• LED countersink hole PCB
• Aluminum countersink PCB
• LED countersink PCB
• Countersink double-sided PCB
• Countersink multilayer PCB

Countersink Holes PCB

What Are Countersink PCBs Used For?

Countersink PCBs have a reputation for compatibility with small electronic gadgets. Its most common applications are in mobile phones, computers, laptops, etc.

Besides, high-density military equipment contains this circuit board due to its robust designs and dimensional stability. It also has significant use in aerospace and navigation systems.

Countersink PCB applications

How To Drill Countersink Holes In PCB?

Using countersink bits is a worthwhile process of drilling countersink holes in PCB. You need to consider hole depth, angles, bit size,  etc to ensure reliable drilling.

First, identify the hole location on the circuit board. Then, choose countersink bits having suitable sizes and adjust their lengths with the screw length.

Countersink PCB Drilling

Now, the most important part comes into place. You have to drill at a controlled speed on the identified locations.  Overspeed causes damage to the circuit board. So, be careful about the drilling speed.

After completing the drilling properly, check its functionality by placing a screw. If there is no problem, you can go for the next drilling of countersink holes. Watch the following video to get a better idea:

What Are The Required Considerations While Drilling Holes In A Countersink PCB?

Countersinking is a useful mechanism for drilling holes on the circuit board. You need to consider the following things while drilling countersink holes on the PCB laminate.

• Countersink hole diameter
• Depth of the countersink drilled holes
• Countersink angle
• Top or bottom sides of the PCB surface to drill the coles
• PTH/ NPTH for countersink PCB holes.
• Finished diameter of the hole shaft.

If you can take care of these factors, you will achieve the optimum output of the PCB countersinking. Watch this video about PCB drilling:

What Are The Significant Benefits Of Countersink PCB?

Countersink holes develop the PCB performance in many ways. The most significant benefits of countersink PCBs are explained here for your convenience.

Smooth Surface

Countersink holes render smoothness in the PCB laminates. So, the PCB outlook becomes highly attractive.

Space Utilization

Countersinking allows the designer to drill by utilizing the minimum space of the PCB surface. Its tight-fitting structure is appropriate for high-density applications.

Highly Functional Countersink PCB

Dimensional Stability

PCBs with countersink holes are dimensionally more stable. These drill holes have sufficient depth and diameter. Besides, countersink holes have different angles that enhance their use in a wide range of electronic devices.

Holding Strength  

Countersinking offers necessary holding strength in circuit board designs. Though the conical structure of these holes can’t tolerate extreme forces, it is sufficient for regular PCB projects.

Which Factors Do Affect The Cost Of Countersink PCB?

Countersink PCB is a cost-effective circuit board. There are some factors which have considerable effects on its cost. Such as:

• Countersinking cost varies due to the service of PCB manufacturers. You should try to find a trustworthy manufacturer that delivers the drilling service of the PCB countersink holes at an affordable price.
• Drilling instruments also influence the cost of countersink PCB. If you intend to get a smooth PCB surface after drilling, you need to conduct countersinking through high-quality equipment.
• PCB materials, surface coating,  copper thickness, etc also can vary the cost. Thick copper surfaces cost higher than a PCB having a thin copper thickness.
• Component mounting process during the PCB assembly is a crucial factor for cost minimization. Through-hole technology is usually expensive compared to surface mount technology.

Cost-effective Countersink PCB

PCBMay offers versatile countersink PCBs at highly competitive prices. So, if you want to get rid of the budget for countersinking holes, get in touch with us.

What Is The Hole Tolerance Of Countersink PCB?

Countersink PCBs have different hole tolerances for PTH (Plated Through Hole) and NPTH (Non-Plated Through Hole). Usually, it provides around 3 mils and 2 mils hole tolerances for PTH and NPTH respectively.

Hole tolerance indicates the highest deviation of the dimensions of these PCB countersink holes. It is primarily important for efficiently and easily placing the flat screwsStandard hole tolerance ensures effective holding strength in this circuit board.

PCB Countersink Hole Tolerance

The following factors have useful impacts on the high tolerance of countersink PCB.

Aspect Ratio

This is the proportion of PCB board thickness and hole diameter. A larger aspect ratio increases the manufacturing cost. So, 6:1 is the most widely used aspect ratio for this circuit board. You can customize this based on your project’s demand.

Drill Tolerance

The tolerance power of mechanical drills is also necessary ensuring a high tolerance of countersink holes. So, you must consider this factor while designing the circuit board with countersink holes.

How To Mount Components In Aluminum Countersink PCB Assembly?

Through-hole mounting is applied in aluminum countersink PCB assembly. Here, component leads are placed on the PCB surface by using plated through-holes.

This mounting process provides some exceptional benefits to the circuit board containing countersink holes. Such as:

• THT components have a strong bond with each other. That’s why aluminum countersink PCBs are widely utilized in electronic applications that require a robust design.
• Through-hole mounting enables this PCB to be tolerant to mechanical stresses and high temperatures.
• Countersink aluminum PCB components are usually edge-mounted. These are compatible with high-frequency PCB

Countersink PCB Component Mounting

But, THT is more expensive compared to SMT. So, you have to trade-off between cost and robustness while dealing with this PCB.

What Is The Dielectric Strength Of LED Countersink PCB?

Dielectric strength is a crucial property of LED countersink PCB. This property refers to the maximum voltage that causes the breakdown of insulating properties in printed circuit boards.

LED PCB with countersink holes to have sufficiently high dielectric strength. It indicates that this circuit board can maintain its dielectric properties up to a high electric potential. So, electricity flow is more consistent in this PCB.

Countersink PCB Dielectric Strength

These PCB materials ensure a minimum relative permittivity in the PCB layers. It is responsible for the dielectric strength. It also enables the designer to control impedance during signal transmission.

How To Control Impedance In Countersink PCB?

Impedance control is an effective feature of countersink PCB.  Well-designed drill holes on the PCB surface affect the factors that play important roles in impedance stability. Such as:

Dielectric Thickness

PCB having a low thickness of insulating materials between traces is effective for ensuring low impedance. As impedance control is related to dielectric thickness, the manufacturer needs to reduce this thickness.

Dielectric Constant

The dielectric constant is the proportion of electric permittivity of material in free space and other mediums. It refers to the charge density in the PCB materials. A low and consistent dielectric constant is perfect for impedance control in high-frequency PCB applications.

Copper Thickness

Copper thickness and impedance stability are inversely related to each other. That’s why you should regulate the thickness of the copper layer as per your requirement of controlled impedance. To reduce impedance, you need to increase the copper thickness.

Trace Width

A higher trace width also causes low impedance in the circuit board having countersign holes. So, you should change the width of metallic coating and copper foil simultaneously to ensure impedance stability in this PCB.

Countersink PCB enables the designer to fulfill all of these demands required for impedance matching. Its board thickness is around 1.6mm for multilayer designs. Besides, holes LED countersink PCBs have 0.2 to 0.4mm board thickness.

Thus, it ensures high-speed signal transmission in stripline and microstrip lines.

What Is The Operating Temperature Of Countersink PCB?

Countersink holes PCBs can tolerate high thermal impacts. That’s why its operating temperature is significantly higher than other printed circuit boards. It typically remains operative up to 86°C.

But, proper thermal management and using durable materials make this PCB compatible with extreme stresses caused by high temperatures.

Countersink PCB contains highly durable materials. These elements provide impressive resistance against very high and low thermal impacts. Besides, these materials enable the PCB to control temperatures.

Countersink PCB Operating Temperature

Its low thermal expansion coefficient and high decomposition temperature indicate the superlative performance of this circuit board. So, its applications are consistently increasing day by day.

How Do You Countersink A PCB Without Countersink Bit?

Countersinking PCB boards are usually done by using different types of countersink bits. Pre-drill and stand-alone countersink bits are very popular in drilling holes on the PCB surface.

But, you can perform the drilling if you have no countersink bit. The two-drill method is a reliable way for this purpose. It never delivers completely flawless drilling, but this is viable to a certain extent.

First, you need to drill a hole based on the screw diameter. Placing a tape on the bit is helpful to avoid drilling through materials.

Then, create a hole for the screw head through a larger bit compared to the head. It enables the screw to sit just below the surface of circuit boards. That is the process to drill countersink holes without countersink bits.

Countersink Bits

What Are The Disadvantages Of Countersink PCB?

Countersinking renders immense benefits to electronic appliances. But, PCB countersink holes have some disadvantages too. You should keep these limitations in mind while choosing a countersink PCB.

Its most notable drawbacks include-

• Its cost is comparatively high than the cost of other drilling holes.
• It delivers insufficient holding strength to circuit boards in some cases.
• Sometimes, countersink circuit boards are not supportive of deep holes.

Effective Countersink Multilayer PCB

You can avoid these problems if you choose a trustworthy countersink PCB manufacturer. Inquire about us to get the top-notch PCB countersinking at reasonable costs.

How To Choose A Countersink PCB Manufacturer In China?

PCB countersink holes are worthwhile for promoting PCB performance. So, you should ensure the best manufacturing of this circuit board. In that case, choosing a reliable manufacturer is very crucial for you.

You need to look for the following properties when you are choosing a countersink PCB manufacturer in China.

Product Cost

This is a vital issue in any kind of PCB manufacturing. You need to compare the PCB product’s cost with other competitor manufacturers. But, sometimes you can trade-off between cost and quality.

PCB Manufacturing Experience  

An experienced manufacturer is capable of delivering fault-less and fast PCB Assembly service. So, it is important to check its working history from the website. You can also gather information from the consumer’s review.

PCB Materials 

Standard materials significantly improve the functionality of the countersink PCB. A high-profile manufacturer should have enough storage of PCB materials to provide instant custom solutions.

Product Quality

You have to check the manufacturer is certified by reputed and reliable organizations. Like RoHS certification and fulfilling the requirements of IPC standards indicate that a manufacturer produces top-quality products. So, you must consider this issue.

Consumer Services

When a PCB manufacturer delivers standard sales and technical service, consumers become pleased with it. So, you need to verify its customer care services.

Besides, it should have a well-structured website where you can easily find any information related to PCB countersink holes.

Skilled Technicians

Technical experts of a PCB manufacturer must be skilled and certified by RoHS. They should have experience in rendering different customization services concerning the customer’s demand.

We have been providing a countersink PCB manufacturing service in China for more than 15 years. Our products are IPC class 2 and class 3 standards. So, contact us immediately to enjoy hassle-free manufacturing of this circuit board.

What Is The Standard Copper Thickness Of A Countersink PCB?

Countersink PCB is supportive of both thick and thin coppers. Customized PCB with countersink holes has 1 oz to 10 oz copper thickness in various applications.

This feature makes this PCB applicable in electronic appliances which deal with heavy current loads along with low production costs. Besides, its standard copper thicknesses improve solderability and make PCB drilling easier.

Countersink PCB Standard Copper Thickness

Impedance stability in PCB having countersink holes greatly depends on the copper thickness. 1 oz copper PCB delivers a higher impedance control. So, its copper thickness has immense significance in developing the circuit board’s performance.

Conclusion

This is almost everything about PCB countersink holes. You should be clear that it delivers the optimum output of PCB drilling. This FAQ guide covers basic to advanced topics related to this PCB.

PCBMay manufactures printed circuit boards having countersink drilled holes with great reliability. If you have further queries about this topic, contact us in no time. We hope you will enjoy the premium PCB experience with us. Stay tuned.