At Standard Cutting Solutions, we know that an end mill’s lifespan depends on factors like application, material compatibility, and coating—and we’re here to help you get the most out of every tool. Premature wear and tool failure aren’t just frustrating—they disrupt your workflow, ruin finishes, and waste valuable time and material. Knowing what these tools go through is beneficial in diagnosing problems keeping production rolling.
In the inaugural SCS blog series, we will tackle seven common problems and offer solutions to get the most out of your tools.
Blog Post 1.4
Chip Packing: Seems small but is a big problem
Let’s talk about one of the most overlooked causes of tool failure—chip packing. It’s not as flashy as broken flutes or dramatic as a snapped tool, but it’s just as damaging. When chips aren’t cleared out of the cut efficiently, they start to pile up fast. Before you know it, they’re jamming the flutes, spiking the temperature, and putting serious stress on your end mill. If left unchecked, chip packing can lead to tool breakage, poor surface finishes, and even damage to your workpiece.
So, what causes it?
Chip packing usually happens when your speeds and feeds aren’t dialed in for the material, or when there’s not enough coolant or air to flush chips out. Certain materials—like aluminum, copper, or plastics—tend to produce gummy chips that stick around. And if your tool has too many flutes or shallow flutes, it’s even harder for chips to escape.
Here’s how to fix it:
- Adjust your speeds and feeds to promote better chip evacuation. Sometimes a faster spindle speed combined with a lighter feed helps break chips and move them out.
- Increase coolant or air pressure to push chips away from the cutting zone.
- Switch to tools with fewer flutes and/or deeper flutes. These tools are designed for chip clearance and work great in softer materials or deep pocketing applications.
- Don’t let chips re-cut. If chips hang around too long, they get re-cut, which dulls the edge and accelerates tool
Need Help?
Remember, no matter how seasoned a machinist you are, even the best can hit a rough patch. The key is identifying the problem, understanding what’s causing it, and applying the right fix. At Standard Cutting Solutions, we’re passionate about partnering with you to solve these problems with American-made tools, expert advice, and personalized service. Reach out anytime!
SCS President Richard Thiele performing inspection and quality control
References
Harvey Performance Company. (2022, February 4.). End mill troubleshooting guide. Harvey Performance. https://www.harveyperformance.com/in-the-loupe/end-mill-troubleshooting-guide/