Applications of CNC Machining in the Medical Parts Industry

CNC machining for medical components
Jack Lie CNC machining expert

Specialize in CNC milling , CNC turning, 3D printing, urethane casting, rapid tooling, injection molding, metal casting,

The field of medicine is often recognized as one that has very few opportunities for errors. When producing medical parts or components, this regulation is also applicable. It is because the sector deals with human life; even little mistakes may result in life-threatening conditions or even death. Consequently, the machining technique used by machinists in producing medical components has to be able to accept tight tolerances and high precision specifications.

The CNC machining technique is the most capable of meeting these standards compared to other types of machining. Besides machining a broad range of materials, it is also capable of conforming to the specifications discussed before. Stay connected to this post if you want to learn about the different methods by which machinists employ CNC machining to produce medical components.

CNC machining for medical components
CNC machining for medical components

Prerequisites for CNC Machining Medical Parts

It is not the same as machining components for other industries when it comes to machining medical parts for the medical business. In contrast to most common metal components, which must conform to ISO 9001 for quality management, medical parts must adhere to additional standards.

As stated by the International Standards Organization (ISO), businesses that are involved in the design, development, processing, handling, distribution, implementation, or servicing of medical parts are required to demonstrate that they can provide medical devices and associated services that regularly meet the requirements of both customers and applicable government regulators.

Your medical components need to be able to demonstrate that they are capable of meeting the following qualification requirements before they may be used:

  • ISO 13485: This is the qualifying standard particular to the medical business. It goes into further depth about the nitty-gritty aspects of the ISO 9001 standard as they pertain to the medical industry and emphasize production process control. It governs several phases of manufacturing: process validation, risk mitigation, and quality control. Suppose a corporation can demonstrate compliance with this standard. Then it will be much simpler for that company to sell its wares worldwide.
  • ISO 9001: This serves as the industry standard for quality assurance and production management. Nevertheless, it is not limited to any one sector of the economy. It indicates that the ISO 9001 standard controls every manufacturing procedure. It helps to save expenses, makes it easier for the company to grow, and ensures that it complies with the standards that have been established.
  • ISO 5001: Energy management is the single criterion used to determine this quality level. Along similar lines, it provides a guideline that producers may use particular medical components to improve their energy use efficiency and hence their overall competitiveness. Note that they will be able to reduce manufacturing expenses even more if they do it this way.
  • ISO 14001: Compared to ISO 5001, this quality standard is comparable but more comprehensive. In conjunction with the ISO 5001 standard, it emphasizes the sustainable use of energy, which enables makers of medical components to reduce their overall energy consumption and waste output. Any business that already satisfies the requirements of this quality standard will undoubtedly have implemented ISO 50001 into its daily operations.

Specifications for CNC Machining of Medical Components

Suppose CNC machine shops want to be successful in machining medical components. In that case, they need to take additional measures to satisfy requirements and acquire certifications. Admittedly, the success or failure of these machined parts might directly impact real humans’ lives.

The following are some of the fundamental requirements for medical CNC machining:

  • Due to their tiny size, many medical components need tight tolerances. It applies to body-intrusive devices. Their modest size will help patients recuperate quicker while minimizing intrusion. Therefore, medical device manufacturing requires strict tolerances.
  • Certain medical components call for intricate geometries and forms; hence, machines with increased cutting flexibility are needed to do justice. To attain this additional cutting flexibility, the best options for CNC machines are those with four or five axes of motion.
  • As we know, there exists the possibility that many of these materials may need to be taken by humans. Due to this reason, machinists must maintain an exceptionally high degree of cleanliness throughout the manufacturing process.
  • There are various materials, including stainless steel and PEEK. Essentially, raw materials used in producing CNC medical components range from metal to plastic. The CNC machine must cut through all of these materials successfully during manufacturing.
  • High degrees of Surface finishing capabilities are of great significance.

Example of Medical Equipment Machined by CNC

Machinists use computer numerically controlled (CNC) medical machining because it is compatible with many of the criteria required in this sensitive business. These requirements include manufacturing medical precision components such as:

1. Medical Implants

Producing body implants (knee replacements and hip implants) is perhaps the most effective application of machining medical parts, making it one of the most important uses of this technique.

Most of the time, medical practitioners need a limited number of implants. Because of this, using a method such as injection molding won’t make any economic sense. It is the case since the manufacture of molds will needlessly drive up the production expenses. On the other hand, while doing CNC medical machining, machinists may reuse the same tools several times. In this manner, they do not impact the expenses of manufacturing.

These implants are fabricated using a wide variety of materials, ranging from plastics ((PEEK)) to metals (titanium), among others. Because of this, CNC machining is a viable option when considering which machining method to utilize. This is due to its ability to work well with diverse materials. As a result, it is an excellent choice for manufacturing procedures of this kind.

Machined Medical Implants
Machined Medical Implants

Typical Machined Implants

  • Spine implants
  • Knee implants
  • Hip implants

Materials Available for Machined Implants

  • Stainless steels (for temporary implants)
  • Titanium alloys such as Ti6Al4V
  • Polyether ether ketone (PEEK)
  • Cobalt-chrome alloys such as CoCr28Mo6

2. Machines Instruments for Surgery

In addition to producing biological implants, CNC machining can make surgical equipment that medical experts use throughout procedures. Surgical scissors, biopsy tubes, blade grips, cutting tools, forceps, implant holders, plate benders, and other metal components might be among these.

These surgical equipment and instruments are subject to additional safety criteria and must be created with care and accuracy. One of these requirements is that they are easy to sterilize.

Because of the great requirement for accuracy, medical device makers could use CNC machining to produce these surgical pieces of equipment. Some kinds of implements and tools can only be made in limited quantities. Some are even made up for specific patients on an individual basis. So, CNC machining will be the most efficient and cost-effective way to create these components.

CNC machining allows for the application of extensive surface finishing procedures to medical precision components, which helps to guarantee that there are no surface flaws.

Machined Surgical Tools
Machined Surgical Tools

Typical Machined Surgical Instruments

  • Forceps
  • Holders
  • Clamps
  • Spacers
  • Handles
  • Cutters
  • Saws

Materials Available for Surgical Instruments

  • Titanium alloys
  • Stainless steels, particularly surgical steel (AISI 316L)

3. Machined Components for Healthcare Electronics

It’s not uncommon for surgical equipment to have two metal pieces. However, CNC machines can fabricate components for more sophisticated devices, such as ECG and heart rate monitors and MRI and X-ray machines. These high-priced items are sometimes made up of hundreds or thousands of discrete components, many of which may be produced using CNC machines.

Switches, knobs, levers, and bigger components like monitor housings are all examples of machined equipment parts. Since medical equipment is often moved from room to room, all parts must be high quality to prevent the machine from breaking down.

The difference between these components and implants and surgical equipment is that the former may not need to be biocompatible because they may never come into contact with the patient. Consequently, a broader range of materials suitable for CNC machining may be employed.

Machined Components for Healthcare Electronics
Machined Components for Healthcare Electronics

Electronic Medical Equipment Parts Machined to the Highest Precision For Exacting Application Results

  • Diagnostic equipment
  • Monitors
  • Lighting
  • Ultrasound equipment
  • MRI scanners
  • CT scanners

4. Micromachining

Producing very minute medicinal components is the focus of this activity. Mostly, this is used in making implanted devices, exploratory surgical instruments, drug-delivering technology, and the like. These gadgets often pack an extremely high complexity into a very tiny footprint.

As a result, their production requires a very high level of expertise. Because of this, a method such as CNC medical machining is an excellent choice. This is the case since it can support great degrees of accuracy. The feature sizes of these parts may be much less than 50 microns.

Swiss machined components
Swiss machined components

Typical Micromachined Components for Medical Equipment

  • Optical switch components
  • Fiber optic components
  • Sonic nozzles
  • Miniature gears
  • Miniature shafts
  • Miniature fittings
  • Electron microscope accessories
  • Micron surgical scissors
  • Saw guides for bone surgery

The Final Word

Machining of medical instruments is a procedure that calls for high levels of precision and accuracy. Thus, this technique lends itself well to CNC machining. However, if the appropriate persons are not assigned to the task, the procedure that was followed won’t make a difference.

Runsom is a reliable manufacturer of medical critical components for surgical instruments and tools, and medical device prototyping. With more than 10 years of CNC manufacturing experience, we are fueled by the assurance of the closest tolerance and precision of each machined part. Our skilled machinists can customize machined parts design for each aspect of the medical industry with the highest standard. Would you like to start your CNC machining projects at Runsom? We are waiting for your request for a quote.