Length Markers on a Medical Device

medical device marking
medical device marking

For Medical Device designers there are multiple ways to add length markers to your device so surgeons are able to see them. These markings can be viewed visually, or they can viewed with another device such as an X-Ray machine. I wanted to mention three marking techniques: laser marking, medical ink and material cuts.

Laser Marking A Medical Device

This is probably the most common way to mark a device. It’s basically burned into the material which means it is difficult to rub off,

Medical Class Ink

There are a variety of inks that meet the FDA requirements for Class VI certification, and can be used with confidence on any of your medical device components. Modern Grinding has a variety of fixtures set up to help with your next device.

Grinding Groove Markers Into the Device

This is a method that we have found ourselves performing more of recently. Basically we plunge grind the wire to make grooves along the length of it. These grooves can remain as is for scanning or they can be filled with a marker type of material such as radiopaque material. This can be the easiest to manufacture since you are able to save additional steps in device machining.

Depending on the complexity of your device and the marking, any of the options can be the most affordable. Reach out today and find out about our advanced capabilities.



Ground Hypotube

Modern Grinding can help with your next ground hyptotube project. We have found more and more medical device companies needing help with profile grounding on the outside diameter of hypotubes. We don’t have our own laser marking equipment, the majority of ground hypotube work comes from laser cutting companies who typically apply some of sort of cut to open up the tube after we work on it. This cut can be something like a stent design or just a hole for a cannula or needle type of product.

Some of the reasons for hypotube grinding are for flexibility or for connecting the hypotube to the rest of the product.

Hypotube Flexibility

Modern Grinding can provide more flexibility to your hypotube by grinding a taper into the outside of the tube. Our capabilities allow us to grind precise dimensions down to a little over .001″ hypotube wall thickness. This allows for a firm tube which leads down to a more flexible or floppy hyptube.

Hypotube Connection

Medical Device Designers, may create a ground slot on the end of a hypotube to allow for connecting to another object. This other object may be on the proximal or distal end of the product for connecting to something on the patient or handling end. Our most recent product had a step on the outside profile of the hypotube. This step allowed for welding to a luer lock.

Don’t hesitate to contact us for help with your next ground hypotube project.



Stainless Steel Medical Device (Taper vs. Step vs. Radius)

I will start out this post by saying we are always game for trying out new projects.  Over time we have learned what is possible, what is difficult but possible, and what is not possible when making stainless steel medical device components. We have also learned why device designers want to take certain approaches.

One consideration when deciding between taper vs. flat step vs. radius is whether or not the wire will be formed after the machining process. From our experience, if the form uses both sides of the step or radius, there can be many difficulties. For one, if you are planning to clip the wire to a form (cylindrical) and then heat set, the different sized radius wire will form differently. A second difficulty can be trying to put through a machine such as a coiler. Many times the radius or step may kink when going through the process. If the wire is going to be formed, we tend to suggest that the wire is tapered, to avoid the miscues.

Why use a flat step or radius vs. a long taper on a stainless steel medical device? We find that most steps and radii are used as a “catch” for some component that goes over it. For instance, you would slide on a coil until it catches on the stainless steel lip. You would then weld the two together at the step or radius.

I hope this helps dispel some myths and helps provide some guidance for stainless steel medical device designers who are working on their next great invention.


Medical Component Grinding

We are going to be mentioned in an upcoming article of Micro Manufacturing magazine so we had a photo shoot with our in process medical component grinding machine. Are there any good in process machine photo enthusiasts out there? How does this look? Any suggestions for future photos?

Diamond Grinding Wheel
Diamond Grinding Wheel


Coil Automation

Modern Grinding is proud to announce we have added coil manufacturing to our list of capabilities. We can achieve coil automation manufacturing for repeatability and lower costs than our competitors. We added a page to our website and a quick video of the machine in process. We are looking for new projects to help show off our capabilities don’t hesitate to reach out with your project.

Watch it in action:

Micro Needle Tip

Micro Needle Tip
Needle Tip

I never know when to use small needle, micro needle and nano needle. For this needle I decided to use micro needle tip. Many of our competitors show you pictures with their products next to a coin so you can easily compare how small they are. We on the other hand put the needle right on top and focused in so you can see if you can guess what type of coin it is.

This particular micro needle tip is going to be welded on to a .013″ stainless steel tube with a hole in the tube for drainage or for drug emission. The .0057″ shoulder helps guide the tip into the tube which has an ID of .006″. The .004″ step is used as a guide to know where to cut off the shoulder.  The tip is 25 degrees sharp. The most difficult part of this piece is connecting the tip to the tube due to the small size of both. Grinding micro parts is the easiest part of the process.

Needle Tip

Styman Pin

We have had a few customers call in asking for Styman Pins. To the best of our knowledge and with a thorough search of the American Medical Dictionary we were unable to figure out what exactly a Styman Pin is. We generally point these inquiries to Steinmann Pins.

If you are ever not sure what type of medical wire, pin or screw you are looking for, don’t hesitate to give us a call, we will point you in the right direction.

Happy pin hunting!