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Flycut or end mill to remove material12/7/2023 There's no use talking about it, as it's a very visual thing. The trick with fly cutter geometry is converting the geometry of an appropriate lathe tool to behave given the geometry of how the fly cutter will engage the workpiece. With facemills that can't be adjusted for height so they all match, each insert cuts a different chipload and this is what results in imperfections in the surface finish.įor Fly Cutter Feeds and Speeds see the Fly Cutter page in our Feeds and Speeds Cookbook. The alternative is a facemill whose individual inserts can each be adjusted for height to eliminate the runout. The facemill to a flycutter which has no runout. Give the best possible finishes (albeit at slower speeds), but why? If you remove all but one cutter Running a cutter with a larger diameter helps speed that operation considerably.įlycutters Can Give Better Finish than Face Mills, Typically, you need to take just a little bit off a very large surface area. Here's one more reason to use a fly cutter-it's a great tool for surfacing your spoilboards on a CNC Router. If you don't recognize the name, he is the "D" in FADAL and was one of the original founders of the company. He's using it to make a fine finish on a part in one pass:ĭavid DeCaussin's Mini VMC uses a Fly Cutter at about 11:05 on the video.ĭavid has probably forgotten more about CNC than most people will ever know. You'll see a fly cutter in the tool changer that comes into use at about 11:05 on the video. Speaking of CNC'ers, here is a video of David DeCaussin's scratch built mini VMC. In most cases, the best finish will be one that can be done in a single pass, which implies a large diameter tool and therefore probably not a face mill. So, for CNC'ers one reason to use a fly cutter is to achieve a fine finish. Many say their secret weapon for fine aluminum finishing is a fly cutter with a PCD (diamond) insert. The exception are those most expensive facemills where you can individually adjust the cutting height of each insert to 0.0001", because that's what it takes, and that's why fly cutters can leave a better finish. Remove all but one insert from your facemill, and finish improves. While the CNC crowd will more often prefer facemills, even many CNC machinists realize that a very fine surface finish may be better done by fly cutting. I get asked about Fly Cutters a lot, there is a lot of traffic to CNCCookbook on those keywords, and Fly Cutters are very commonly used by manual machinists. But, you also see single point form tools referred to as fly cutters on mills, for example a form tool being used to create an involute on a gear tooth. The most common fly cutters are used as surfacing tools. Learn what a fly cutter is and how to use one to get the best possible surface finish on a milling machine.Ī Fly Cutter is any single point cutter that is used on a mill.Ī Fly Cutter is any single point cutter that is used on a mill. Ultimate Fly Cutter Resource: Surface Finish Rewards
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