{"id":660,"date":"2026-11-03T17:39:44","date_gmt":"2026-11-03T09:39:44","guid":{"rendered":"http:\/\/www.frphilo.com\/blog\/?p=660"},"modified":"2026-11-03T17:39:44","modified_gmt":"2026-11-03T09:39:44","slug":"what-are-the-common-materials-for-cutting-tools-in-parts-machining-4c34-07d609","status":"publish","type":"post","link":"http:\/\/www.frphilo.com\/blog\/2026\/11\/03\/what-are-the-common-materials-for-cutting-tools-in-parts-machining-4c34-07d609\/","title":{"rendered":"What are the common materials for cutting tools in parts machining?"},"content":{"rendered":"

When I\u2019m walking the shop floor at our parts machining facility, I see cutting tools getting thrown in the chip bin every single day\u2014some still look brand new, others are so worn you can barely make out their edges. It got me thinking a lot lately: so many of our clients, even the ones who\u2019ve been working with us for years, sometimes ask, \u201cWait, what are the actual materials you use to cut my parts?\u201d It\u2019s a fair question, right? Because the tool material isn\u2019t just a random detail\u2014it\u2019s what determines how fast we can machine, how accurate the parts stay, and even how much your order ends up costing. A lot of guys I work with on the floor just call them \u201ccarbide\u201d or \u201chigh-speed steel\u201d like it\u2019s no big deal, but there\u2019s more to each one than just the name. Let me break down what our team uses most often, why we pick each one, and when they work best for the parts you\u2019re sending our way. Parts Machining<\/a><\/p>\n

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First up, the one we reach for more than any other: solid carbide, or just carbide around here. It\u2019s not like the carbon steel stuff you might have a drill bit made from\u2014this is a composite, right? Tungsten carbide particles pressed together with a binder, usually cobalt. The mix changes depending on what we\u2019re cutting, too. If we\u2019re dealing with tough, heat-resistant alloys that aerospace clients love to use, we go with a higher cobalt binder because it\u2019s a bit more flexible and doesn\u2019t chip as easy when we\u2019re pushing hard. For softer, common materials like aluminum or even mild steel, we can drop the cobalt a little to make the cutting edges sharper\u2014no need for extra toughness there, and the sharp edges mean a cleaner cut. I\u2019ll be honest, though, carbide isn\u2019t perfect. It gets brittle if it overheats, so if we\u2019re running high-volume jobs that crank out a lot of heat (like machining stainless steel for food equipment parts), we\u2019ll spray tons of coolant and even use coated carbide to make it last longer. Coating is another big piece I can\u2019t skip here\u2014we use things like TiN (titanium nitride) for general jobs, TiCN for harder materials, and even diamond coatings when we\u2019re working with non-ferrous materials that tend to stick to regular tools. That diamond coating is game-changing for aluminum parts, by the way\u2014no built-up edge, which means the parts come out smooth instead of having those ugly burrs you have to sand off later.<\/p>\n

Next, high-speed steel (HSS). This is the old-school stuff, the kind your granddad might have used in a garage workshop, but don\u2019t sleep on it. We don\u2019t use it for most high-precision parts anymore, but when we\u2019re making simple, low-tolerance parts or running a job that doesn\u2019t need a ton of speed, HSS is way cheaper than carbide. Think of it like a workhorse for small jobs: it has more carbon than regular steel, so it can handle higher temperatures without dulling as fast. The grade we use most here is M2 HSS\u2014it\u2019s got a good balance of toughness and hardness, perfect for things like drill bits, end mills, or even taps for threading small bolts. The only downside with HSS is that it doesn\u2019t hold up nearly as long as carbide. If we\u2019re machining 1,000 aluminum parts, carbide might last through the whole run, but HSS would need two or three replacements. But if you\u2019re ordering a prototype batch of 50 parts, HSS is totally fine\u2014we can pass the lower tool cost on to you, which saves money on small runs. We also use powder metallurgy HSS for a few niche jobs; it\u2019s made by compressing powdered steel instead of forging it, so the grain is more uniform and it\u2019s a bit tougher than regular M2. That comes in handy when we\u2019re doing slower, more delicate cuts on thin parts that can flex if the tool is too rigid.<\/p>\n

Then there\u2019s the one that sounds fancy but is actually super useful for specific jobs: cermets. I know, I know, cermet sounds like a sci-fi material, but it\u2019s basically a mix of ceramic and metal\u2014usually titanium carbide or titanium nitride mixed with nickel or molybdenum as a binder. We don\u2019t use it every day, but when we do, it\u2019s a huge upgrade for certain jobs. The big thing about cermet is it can cut way faster than carbide\u2014like 20-30% faster\u2014because it\u2019s harder and holds a sharper edge way longer. The catch? It\u2019s way more brittle than carbide, so it can\u2019t handle any kind of interruption, like cutting a part that has holes or pockets in it where the tool has to stop and start. That means we only use cermet for continuous cuts on clean, uniform materials, most often stainless steel and cast iron. A lot of our automotive clients swear by cermet for their engine parts because the faster cuts mean lower lead times, which is huge when they\u2019re waiting on parts to keep their assembly line moving. Just last month we did a run of 5,000 connecting rods with cermet end mills and the parts came out so smooth we barely had to do any secondary finishing. That\u2019s the kind of win that makes even the shop foreman happy.<\/p>\n

Let\u2019s not forget ceramics either\u2014wait, not the dishes in your kitchen, but ceramic cutting tools. These are made from aluminum oxide or silicon nitride, and they\u2019re basically unbreakable when it comes to heat. They can handle temperatures up to 2,000 degrees Fahrenheit, which is way hotter than any machining job we do, so they\u2019re perfect for super hard materials like hardened steel, Inconel, or other aerospace superalloys. The only problem is, they\u2019re so brittle we can\u2019t use them on anything that has irregular shapes or requires any kind of interrupted cut. We use ceramic tools mostly for finish cuts on parts that need to be super tough\u2014like turbine blades for jet engines, which have to hold up to extreme heat and pressure. I remember a few years back we tried using carbide on a run of turbine blades and half the tools wore out before we finished a third of the batch; switching to ceramic cutters cut our tooling time by 70% and got the parts out two weeks faster. It\u2019s a specialized tool, yeah, but when you\u2019re working with materials that are almost impossible to machine with regular tools, ceramics are the only way to go.<\/p>\n

Oh, and there\u2019s diamond\u2014polycrystalline diamond (PCD) to be exact. That\u2019s the hardest material on Earth, so obviously we use it for super soft, non-ferrous materials that would wreck regular tools. Think aluminum, copper, brass, even graphite. Graphite is weird because it\u2019s super abrasive, so regular carbide tools dull in minutes, but PCD? It lasts through hundreds of parts. We also use PCD for finishing cuts on things like copper electrical components, where the surface has to be absolutely smooth to conduct electricity well. The downside? PCD is expensive\u2014way more than carbide or HSS\u2014and it only works on non-ferrous materials. If you try to use it on steel, it just eats the diamond away, so we stick to it for the jobs where it actually makes sense. We recently did a run of 10,000 copper heat sinks for a tech company, and using PCD tools meant we didn\u2019t have to replace tools once during the entire run. That\u2019s the kind of reliability that makes our clients come back, right?<\/p>\n

Wait, I should also mention coated tools, because that\u2019s not a material but it\u2019s just as important. A lot of people think the material is the only thing that matters, but the coating is what makes the tool last. We use coatings like TiAlN (titanium aluminum nitride) for high-heat jobs, like machining titanium, because it resists oxidation way better than TiN. For aluminum parts, we use diamond coatings as I said before, and for threading jobs, we use TiCN because it\u2019s less likely to stick to the material. The coating is super thin, only a few microns thick, but it reduces friction between the tool and the part, keeps heat down, and prevents the material from building up on the tool\u2019s edge. I\u2019ve seen guys skip the coating to save a few bucks on tooling, and they end up having to redo half the parts because of burrs or rough surfaces\u2014total false economy.<\/p>\n

Now, let me talk about how we pick the right tool for your part, because that\u2019s where a lot of machining shops drop the ball. It\u2019s not just about grabbing the hardest tool or the cheapest one\u2014It\u2019s matching the tool material to your part material, the tolerance you need, and how many parts you\u2019re ordering. If you\u2019re sending a prototype of a plastic bracket, we\u2019ll use HSS because it\u2019s cheap and works fine for low volume. If you\u2019re sending a high-volume run of stainless steel medical parts with tight tolerances, we\u2019ll use coated carbide to keep the cuts accurate. If you\u2019re machining a turbine blade made of Inconel? We\u2019ll go with ceramic tools, no exceptions. We also factor in lead time\u2014if you need the parts in 3 days, we might use a cermet tool to run faster instead of waiting for a special carbide tool to come in.<\/p>\n

I know a lot of small business owners or engineers might not think about cutting tool materials when they\u2019re sending a quote request, but it makes a huge difference in your final part. Last year, a client sent us a quote for a run of 2,000 aluminum parts and wanted the lowest price possible. We quoted HSS tools, but when we ran the numbers, we saw that using PCD tools would only add $0.20 per part, but it would eliminate all the burring work they had to do in-house. They ended up going with the PCD tools and saved $1,500 in finishing costs. That\u2019s the kind of value we try to bring to every job, not just the big corporate accounts.<\/p>\n

At the end of the day, cutting tools are the unsung heroes of parts machining. They don\u2019t get talked about as much as the CNC machines or the part designs, but they\u2019re the reason we can turn a solid block of metal into a precise, functional part that fits perfectly into whatever it\u2019s going into. Whether you\u2019re ordering a prototype or a 10,000-part run, the material we use for the tool is something we always think through, because it affects every part of the process\u2014from the speed we run at to the quality of your final part.<\/p>\n

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If you\u2019re working on a project right now, whether it\u2019s a small prototype or a big production run, and you\u2019re wondering what tool material will work best, or you just want to chat through the best way to get your parts machined right, feel free to reach out. We\u2019re here to walk through your needs, pick the right tools for the job, and make sure your parts come out exactly how you want them. Don\u2019t hesitate to connect with our team to discuss your next order\u2014we\u2019re ready to help.<\/p>\n

Stud&Bolt<\/a> References:<\/p>\n

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  1. Tonshof, H. K., et al. "Advanced Cutting Tools in Machining." CIRP Annals, vol. 49, no. 2, 2000, pp. 561-574.<\/li>\n
  2. Byrne, G., et al. "Cutting Tool Materials and Their Performance in Machining Processes." Journal of Materials Processing Technology, vol. 134, no. 1, 2003, pp. 77-86.<\/li>\n
  3. Childs, T. H. C., et al. Metal Cutting: Theory and Applications. Butterworth-Heinemann, 2017.<\/li>\n<\/ol>\n
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    Kunshan Haizhijie Precision Hardware Co., Ltd.<\/a>
    As one of the most professional parts machining manufacturers and suppliers in China, we’re featured by quality products and good price. Please rest assured to buy customized parts machining made in China here from our factory. Also, pricelist is available.
    Address: No. 367, Kangzhuang Road, Zhou City Town, Kunshan City, Jiangsu Province, China
    E-mail: wzhshui@sina.com
    WebSite:     https:\/\/www.hzhjmetal.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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