Carbide tools can withstand higher temperatures at the cutter-workpiece interface than standard high-speed steel tools (which is a principal reason for the faster machining). Most of the time, carbide cutters will leave a better surface finish on the part, and allow faster machining than high-speed steel or other tool steels.
Mentions of "carbide" or "tungsten carbide" in industrial contexts usually refer to these cemented composites. Cemented carbides commonly use tungsten carbide (WC), titanium carbide (TiC), or tantalum carbide (TaC) as the aggregate. It consists of fine particles of carbide cemented into a composite by a binder metal. Single is fine for clearing, but doesn’t give a great finish.Cemented carbide is a hard material used extensively as cutting tool material, as well as other industrial applications. You have to make sure to vacuum during the job.Īnd as far as flutes go, I would just go with double for most SM stuff. Downcut bits give a better surface finish but especially in deep ruts they can compact the shavings and jam things up. Upcuts work better for clearing and pull the chips away from the workpiece but they don’t give as good of a surface finish. The one thing, especially if you do any deeper cuts, is to have both upcut and downcut bits.
Like someone was having a problem on this forum and it turned out that it was sapele and there are issues with machining it because of it’s grain structure. Also if there are any characteristics of the wood that you should know about. Look up and compare the janka rating of any type of wood you use. Every piece of wood is different even among the same species. I slow down a little more with small bits - 1mm or less but for the most part I use the same speed and step down with 1.5 to 6.35mm. And if starts stuttering or vibrating or chattering you just want to stop it immediately. If you just listen to your SM and watch it, it will tell you what you need to know. There are calculators online that you can use, but in real world use with the power of the current spindle they’re more theoretical. You really should have one for measuring thickness of stock both for cnc and laser, as well as if you’re going to design anything for 3d.īecause of the limits of what the SM can do there really doesn’t end up being that much to learn or figure out as far as speeds and feeds. That way you can just measure and enter your own specs for your bits. Get a digital caliper if you don’t already. I have no complaints about the SM ones, but you can find better value elsewhere. You can do everything right and still snap them. May be able to bump that up to 1mm, but start there. 5mm step-down and 400-600mm/m work speed. SM has no problem running them with the caveat that you need to keep your step-down and work speed small. By removing larger stock with larger bits you can really speed up the process. Overkill unless you’re doing production work on a bigger stronger machine.ġ/4" or 6mm or 6.35mm are used for larger clearing passes. If you want to spend a little more Whiteside and CMT are really good value.Īmana has the reputation as being the best but the price reflects it. Managed to break the small end mill with my first play finding center point, doh !!!Īny help and advice you can give is appreciated Have successfully carved a few things though anyone got a tool library setup that I can copy for these?īit of a candid question too, am considering getting the 5 peace set off snapmaker for ease, are these bits ok? Are they going to last? I bought this set when I knew I would be starting the cnc journey but I’ve had a little trouble setting them up in fusion, I measured them with the callipers etc but still got abit of air carving and have no idea if my speeds etc are right.
Have seen that we can use 1/4 collet which would make for a faster roughing pass but should we do this given the limitations of the motor? Getting into the wonderful and in-depth world of cnc routing.Īs well as learning fusion 360 I’m interested in the bits I can and should use for my projects.Īre there any recommended bits I can use in Europe, preferably with electronic tool file for fusion 360?
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