VIDEO: Ramping With the New SGE-R Insert for Mill 4-15™

The SGE-R geometry adds to the capabilities of Kennametal's Mill 4-15 series, enabling ramping operations and helical interpolation.

Watch time: 4:07 minutes

Supplier: Kennametal

Posted date: Oct 01, 2021

Looking for full transcript of video? Read now

The Mill 4-15™ series is specially engineered to achieve excellent surface quality and higher metal removal rates in shoulder milling applications. The unique design allows you to apply the tool in multiple passes, called “step down”. Most tools leave tool marks with every pass they take, resulting in unsatisfactory or low-quality wall finishes. This usually requires another finishing pass at the very end of the process. The Mill 4-15 eliminates that finishing pass with an additional tool, saving time and money. The SGE-R geometry adds to the capabilities of the Mill 4-15 series, enabling ramping operations and helical interpolation. See how you can achieve superior wall surface finishes with the Mill 4-15 in the short video above.

Previously Featured on Kennametal's YouTube channel.

Video Transcript

A small thing can make a big difference. See this here? That is what makes the difference between having the capability to ramp with a tool or not. We're talking about this tool here, the Mill 4-15™, the shoulder mill that's well known for its capabilities to create excellent wall surface finishes especially when running multiple passes. It literally leaves no visible marks behind. It has a maximum depth of cut of 15 millimeters and four cutting edges but it can't ramp, not with this insert. But now it can with this one. See the big R on the insert? That stands for ramping and that's the new SGE-R geometry. Let's check it out.

We're machining on this block of 4140 steel. We'll start with this 50 millimeter cutter and five of the SGE geometry inserts in the cutter. That's the one that cannot ramp and you'll see that it can't right away. We're taking a five millimeter radial depth of cut pass. Axial depth of cut starts at 9.9 millimeters and exits at 15 millimeters axial depth of cut. That's a 1.36 degree ramping angle. Look at the sparks. It's leaving a lot of burrs. This doesn't look good at all. But no surprise right? That's why you need to pay attention to the R on the insert. Only the SGE-R geometry is capable of ramping. Let's clean this up and try this again, this time with the SGE-R geometry. Same cutting conditions, same ramping angle of 1.36 degrees. Nice. No sparks. No burrs. Beautiful.

Next, we're going to create a pocket with helical interpolation. Same ramping angle again. It's almost silent. Very soft cutting action. It's pretty amazing. Finally, we'll create another pocket. This time with a very tight situation where the chips have nowhere to go. We're zigzagging back and forth. Same maximum ramp angle again. Same cutting parameters. We're seeing and hearing the same again. Very soft cut, very good looking surface. The SGE-R is a great addition to the Mill 4-15 insert portfolio. It also comes with four cutting edges, one corner radii, and five different grades. It works great in nearly all materials and makes the Mill 4-15 more versatile than ever. Thanks for checking out the Mill 4-15 and the new SGE-R insert for ramping. Don't forget to like this video and subscribe to our channel so you don't miss out on any of our upcoming videos.