When you first set up your CNC router, you’re probably eager to start making parts. But what happens when you realize you need more than just the machine itself? To use a CNC machine to its full potential, you may need certain accessories. 

Some essential CNC router accessories include workholding tools, measurement devices, and some tools for keeping the cooling system running. These tools help improve precision and accuracy of the machined parts and ensure the machine runs smoothly. 

Read on to discover which accessories can truly improve the performance of your CNC metal router​ and help it run for a long time. 

Essential Add-Ons 

Adding a few accessories to your CNC router can make a big difference in how smoothly and effectively it runs. These add-ons are not mandatory but they can improve performance, safety, and efficiency. 

One of the most important accessories for a CNC setup is a solid workholding system. Tools like vacuum or toggle clamps securely hold your material in place, preventing any movement during cutting. It helps you achieve precise cuts and ensure safety, as loose material can lead to errors or accidents.

Another valuable accessory is a set of measurement tools. Items like digital height gauges or laser measurement systems allow quick, accurate measurement of workpieces, which ensures perfect alignment. 

Cooling systems are also essential, especially for jobs that require heavy cutting. These systems help prevent the router bit from overheating, extending its lifespan. A cooled router bit cuts through material more efficiently, reducing the chances of warping or burns on your work.

Workholding Solutions 

The right workholding solution can reduce the setup time and improve precision. Let’s discuss some options that can transform your CNC setup. 

1. Vacuum Clamps 

Vacuum clamps use negative pressure to secure a workpiece, offering an efficient way to hold materials in place. 

These clamps work by creating a vacuum underneath the workpiece, which is sealed by a strip placed around its edges. As the air is evacuated from beneath the material, the atmospheric pressure on top holds it firmly in position. 

Some of the primary benefits of vacuum clamps are:

• Quick loading and unloading of materials 
• Even pressure distribution reduces the risk of material deformation
• Ideal for thin, flat workpieces that traditional clamps may struggle with
• Low-contact clamping, reducing damage to delicate surfaces 

However, vacuum clamps do have some limitations. They work best with non-porous materials, as porous materials might require extra sealing measures. It’s also important to check the system regularly to avoid leaks and ensure consistent performance. 

2. Toggle Clamp Systems 

Toggle clamps are another common workholding solution for CNC routers. These mechanical devices use a pivot and lever system to apply a strong clamping force, locking your workpiece securely in place. 

How do they work, though? Well, the lever engages the clamp, which then presses an arm against the material, holding it firmly against the table or fixture.

Using toggle clamps will give you these advantages: 

• Getting a robust and reliable grip for various machining tasks
• Fast clamping and unclamping, streamlining workflow
• Available in multiple sizes to accommodate different workpieces

That being said, toggle clamps require manual engagement, which may not be the best choice for high-volume production. You need to position them carefully to avoid interfering with the cutting path. Also, for delicate surfaces, you might need to use pads or soft materials to prevent marring. 

Despite these minor drawbacks, these clamps are a reliable and flexible solution for many CNC operations. 

3. Custom Jig Designs

For more complex or specific workpieces, the CNC router accessories you can use are custom jigs. These are tailor-made fixtures designed to hold a particular workpiece securely during machining. 

The design process involves several steps: analyzing the workpiece, determining the clamping points, and choosing the right materials and components for the job.

The benefits customized jigs offer are: 

• Ensures precise positioning for each workpiece
• Reduces setup time and increases repeatability for production runs
• Can be designed for complex shapes or specific machining operations
• Provides consistent results across multiple parts

Designing and manufacturing custom jigs takes time and resources, and they may not be as versatile as modular systems. If you use them, you have to do regular inspection to ensure that they maintain accuracy over time. 

Measurement Tools 

You will need some specific CNC router tools for accurate measurements of the workpieces. Let’s have a deeper look into them: 

1. Touch Probes 

Touch probes enhance the measurement accuracy on your CNC router. Mounted onto the spindle, these precision sensors can detect the exact position of a workpiece by making contact with its surface. Once the stylus touches the material, the probe sends an electrical signal to the CNC controller, recording the coordinates of the workpiece. 

These probes are especially useful for complex shapes or parts that need to be replicated. However, they require regular calibration to maintain measurement accuracy. 

A high-quality touch probe can be a significant investment. So, it’s important to choose one that’s compatible with your CNC machine and controller software.

The services you can get from touch probes are: 

• Accurate Positioning: Ensures your workpiece is oriented correctly before machining begins.
• Versatile Use: Ideal for tasks like reverse engineering, inspection, and digitizing complex shapes.
• Precision Measurements: Helps capture the geometry of existing parts for reproduction or modification. 

2. Laser Edge Finders 

A laser edge finder is a non-contact tool that projects a laser beam onto the surface of the workpiece, helping you easily locate edges or centers for alignment. This method eliminates the need for physical contact, reducing the risk of damaging delicate surfaces. 

With this tool, you can quickly locate edges, centers, or scribed lines for efficient alignment. And operators of all skill levels can use it due to its straightforward operation. 

While laser edge finders are fast and effective, they may not always match the precision of touch probes in certain scenarios. Lighting conditions can also affect their accuracy, so proper calibration is essential for consistent results. 

3. Digital Height Gauges 

Another measurement tool that you can add to your arsenal of CNC machine accessories is a digital height gauge. It does the job of setting and verifying the height of cutting tools such as router bits, saw blades, or other machine components. You can also use it to check material thickness. 

A digital height gauge can measure to an unbelievable accuracy of 0.001 inches or 0.01 millimeters. And its digital display makes it easy to read measurements and reduces the chance of misinterpretation.

Like other measurement tools, digital height gauges require regular calibration and battery checks to ensure they remain accurate. It’s also a good idea to invest in a sturdy, well-built gauge that can withstand the rough conditions of a workshop. 

Cooling Systems 

Your CNC router accessories must-haves should also have an effective cooling system. It’s because it maintains the right temperature and minimizes friction during cutting in CNC routing, which you need for achieving clean, precise cuts. 

Let’s discuss some cooling system accessories: 

1. Mist Coolant Units 

Mist coolant units are a popular solution for cooling and lubricating the cutting area in CNC routers. These systems use a mix of compressed air and liquid coolant to create a fine mist. There is an adjustable nozzle to direct the mist at the cutting zone.

The mist keeps the temperature down, preventing tool wear and poor finish quality. It acts as a lubricant, which lowers friction to extend the life of cutting tools. Less friction also results in smoother cuts, which improves the overall surface finish of the workpiece. In addition, coolant mists help to prevent material warping, especially when working with heat-sensitive materials.

However, there are some maintenance considerations. For example, regular cleaning of the nozzle and other system parts is essential to avoid blockages. You also have to use the right type of coolant for the material being machined, as some coolants can cause unwanted reactions. 

Also remember that while mist coolant units are effective, proper ventilation is necessary to avoid inhaling the mist, which could be harmful over time. 

2. Air Blast Systems 

You can use an air blast system for operations involving materials that are sensitive to liquid coolants or when you need to avoid coolant residue. 

These systems use compressed air to blow away chips and cool both the tool and the workpiece. The high-pressure air stream clears debris from the cutting zone, preventing it from interfering with the machining process.

Air blast systems are also often easier to install and maintain compared to liquid-based systems. Since air is relatively easy to supply and doesn’t require complex plumbing, many CNC routers can be retrofitted with such a system. 

The noise from high-pressure air streams can be significant, so hearing protection may be necessary in some work environments. Another consideration is the potential for static charge buildup. But you can address this by grounding the system. 

3. Through-Spindle Coolant

Through-Spindle Coolant (TSC) is an advanced cooling method that is particularly useful in high-speed machining and deep-hole drilling. In this system, coolant is delivered directly through the spindle and the cutting tool to the cutting area. The coolant is pumped under high pressure through internal channels within the spindle and the tool itself.

This direct cooling method is incredibly effective, as it reduces the risk of thermal stress on the tools. It also facilitates deeper cuts without the need for peck drilling, which can reduce cycle times and improve productivity. Furthermore, TSC provides excellent chip evacuation and lubrication.

While highly effective, TSC systems can be complex to implement. Not all CNC machines are equipped for through-spindle cooling. And retrofitting a machine for TSC can be expensive and technically challenging. 

A TSC system also requires regular inspection and cleaning. There should not be any blockage to the internal coolant channels, as any interruption in coolant flow can damage both the tools and the machine. 

Conclusion

Adding some essential CNC router accessories will help you get the best output from your tools. They also have a role in making high-quality CNC machined parts. Choosing the right add-ons will make the production process faster and more efficient by reducing errors and increasing the overall productivity. 

Looking to take your precision CNC machining to the next level? At Zintilon, we offer custom CNC parts and prototypes that are built to last. Let us help you optimize your production with the best accessories for your CNC router. Reach out for a free quote. 

———————————————————-