Some materials just like to gum up the works. You know the ones we’re talking about–stuff like 303, 304 and 316L stainless steel, or Ti-6Al4V and other titanium alloys. These bad boys have a tendency to generate excessive heat at the contact area. This results in those long continuous chips that can weld on to the tool edge, giving you a poor finish, or worse yet, out of tolerance parts. And you can just imagine what that kind of heat does to tool life. All materials that fall into the “gummy” category require unique geometry if you want to mill them successfully. What’s the answer? Get your productivity back on target with the PYSTL (pronounced “pistol”) series end mills from GWS Tool Group.

Designed for Clean Cutting
The ability of the cutting edge to shear the work material with as little residual friction as possible after initial contact is critical in producing an end mill that will satisfy the tool life and metal removal demands of today’s manufacturers. That’s why PYSTL series end mills are designed with an array of purpose-built features that specifically address the gummy nature of the aforementioned materials, and others like them.

High Quality and Long Life
All PYSTL end mills incorporate full eccentric relief. This design element, combined with the right degree of relief, produces a cutting edge that is both rigid and free-cutting.

Other fundamental attributes built in to these end mills that make them ideal for gummy materials like 316L and 303 stainless are the unequal index design incorporated into the 4-flute and 5-flute models. This design element reduces vibration in machining operations by breaking up harmonic resonance that is prominent with end mills using equal spacing between each flute. Couple this design attribute with a tapered core, used across the entire series of PYSTL end mills, and you get an incredibly robust end mill that resists both vibration and deflection during machining.

Last, but not least, the series features a nano PVD coating that incorporates elements like aluminum and chromium for higher hardness, heat resistance and lubricity. Premium micrograin carbide is used for the base of this Ultimate Performance tool end mill line.

Pick Your PYSTL
The series, which includes 4, 5 and 7-flute end mills, is available in diameters 1/8” to 1-1/4” with radii from 0.010” to 0.250”. Our “PYSTL Grip” shank treatment, for added anti-pullout protection, is also available upon request.

Hit the Bullseye Every Time
If you are struggling with milling gummy, difficult-to-machine materials like 6Al4V-Ti, or are simply looking to possibly upgrade your current milling operation, give the PYSTL series end mills from GWS Tool a shot.

Contact Us today to find out more or sign up for our free Test Tool Program.