{"id":527,"date":"2026-10-09T13:00:32","date_gmt":"2026-10-09T05:00:32","guid":{"rendered":"http:\/\/www.ilicoco.com\/blog\/?p=527"},"modified":"2026-10-09T13:00:32","modified_gmt":"2026-10-09T05:00:32","slug":"can-a-double-row-grinding-wheel-be-used-for-external-cylindrical-grinding-4b57-06f432","status":"publish","type":"post","link":"http:\/\/www.ilicoco.com\/blog\/2026\/10\/09\/can-a-double-row-grinding-wheel-be-used-for-external-cylindrical-grinding-4b57-06f432\/","title":{"rendered":"Can a double row grinding wheel be used for external cylindrical grinding?"},"content":{"rendered":"

Hey there, grinding gear heads! Let\u2019s cut to the chase today\u2014something I get asked at least twice a week from folks in the machining world: Can a double row grinding wheel even be used for external cylindrical grinding? As the guy who\u2019s spent the last 8 years selling these things (yeah, I\u2019m the double row grinding wheel supplier you might\u2019ve gotten a quote from last month), I\u2019m here to break this down like we\u2019re geeking out at a job site, not writing a college thesis. No stuffy jargon, no fake AI flow, just real talk from someone who\u2019s fielded way too many "wait, really?" questions about these wheels. Double Row Grinding Wheel<\/a><\/p>\n

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First off, let\u2019s get the basics straight for anyone who\u2019s new here, no shade. External cylindrical grinding (let\u2019s just call it EGC from now on, I\u2019m not typing that whole phrase every time) is that process where you spin a cylindrical workpiece\u2014think a camshaft for a car, a hydraulic pump shaft, even that tiny pin for a medical device\u2014and grind its outer surface to super tight tolerances. Like, we\u2019re talking +\/- 0.0001 inch tight, right? Traditional single row grinding wheels have been the go-to here for decades\u2014they\u2019re simple, cheap enough, everyone knows how to dress them. But double row wheels? These are the ones with two separate grinding faces stacked side-by-side on the arbor, right? I show them to customers and half the time they go, \u201cWait, those aren\u2019t just two wheels glued together?\u201d Nope, not even close. They\u2019re precision-engineered as a single unit, so the spacing between the rows is dead consistent, no slop.<\/p>\n

So the big question: Will this even work for EGC? The short answer is yes\u2014BUT only if you\u2019re using the right double row wheel for the right job. Most people\u2019s first hangup is, \u201cWon\u2019t that mess up the surface finish?\u201d Or \u201cCould it throw off the concentricity?\u201d Let\u2019s tackle those, because I\u2019ve seen both problems and solutions in person.<\/p>\n

First, let\u2019s talk when it works like a charm. I had a customer last year\u2014small aerospace machine shop\u2014grinding landing gear pinions for private jets. They were using single row wheels before, but they were getting 2x as many rejections because the surface roughness was just barely over spec. One of their guys saw a double row sample I left at their trade show booth, so they tried it. Why? Because with EGC, you want two things: material removal rate (MRR) and a smooth finish, right? A single row wheel has to do all the heavy grinding and the final finishing in one pass. A double row splits that job\u2014one row is the roughing row, taking big, deep cuts to strip away excess stock fast, and the second is the finishing row, running super light, almost spark-only passes to polish the surface. That\u2019s a game-changer for parts that need both speed and perfect finish. That aerospace shop cut their cycle time on those pinions by 38% and dropped rejections to less than 1%\u2014I still get a Christmas card from their owner about it.<\/p>\n

But wait, it\u2019s not all sunshine and no rejections. The mistake I see new users make is grabbing any double row wheel and slapping it on their EGC machine. Here\u2019s the hard part: EGC wheels, regardless of row count, need to match the workpiece material. For example, if you\u2019re grinding high-tensile steel like automotive crankshafts, you need a double row wheel with a ceramic alumina abrasive for the roughing row and a finer grain size aluminum oxide for the finishing row. If you swap that for a generic silicon carbide double row wheel, you\u2019re gonna clog the second row fast, burn the workpiece, and that concentricity I mentioned earlier? It\u2019ll be off. Why? Because double row wheels have to be aligned perfectly with the workpiece\u2019s axis. Most EGC machines have a truing system, but with a double row, you can\u2019t skip the final alignment check. One of my first big customers years ago tried a double row wheel without truing it properly and ended up with a batch of hydraulic shaft collars that were 0.002 inch off center\u2014wasted $12k in materials. Lesson learned.<\/p>\n

Another thing people don\u2019t talk about enough: heat. Grinding generates heat, and too much heat ruins EGC parts\u2014you get micro-cracks, work hardening, all that bad stuff. A double row wheel\u2019s design actually helps here. The two rows are spaced just far enough apart that coolant can flow between them, get to the grinding zone, and carry away heat way better than a single row wheel. That\u2019s a huge win for parts that are heat-sensitive\u2014like titanium fasteners for medical devices or aluminum hydraulic fittings. I had a medical parts shop switch to double row wheels for titanium hip pin grinding, and they cut their post-grind stress relieving step by 70% because the wheel took care of most of the heat management. No more waiting 24 hours after grinding to machine the next step.<\/p>\n

Now, let\u2019s get to the scenarios where a double row wheel might NOT be the best pick for EGC, because I hate overpromising. If you\u2019re doing super-small-batch work\u2014like grinding one custom bolt for a prototype\u2014swapping between single row and double row is a hassle. The truing time is longer, so you might not save any time on a 1-off. Or if your EGC machine is old, like a 1980s model that doesn\u2019t have precise spindle alignment or powerful enough coolant pumps? A double row wheel needs a stiffer spindle to handle the extra contact area. I\u2019ve had a few small shops with legacy machines reach out, and I\u2019ll always be honest with them\u2014stick to single row for now, because retrofitting the spindle alignment for a double row might cost more than the wheels themselves. That\u2019s not me trying to make a sale; that\u2019s me not wasting someone\u2019s money.<\/p>\n

Wait, let\u2019s also clear up a common myth I hear all the time: \u201cDouble row wheels are only for surface grinding!\u201d No way. Yeah, they\u2019re popular for surface grinding where you need both roughing and finishing, but EGC is actually a really good fit because of how the workpiece spins. In surface grinding, the wheel moves across a flat part, but in EGC, the workpiece is rotating, so each row of the double wheel only contacts the workpiece for a fraction of the revolution. That means each row gets a chance to cool down between passes, which reduces wear on the wheel. I did a test last year with a local university\u2019s machining lab\u2014they ran EGC on a 4140 steel shaft, single vs double row. The double row wheel lasted 2.5x longer than the single row, and the surface roughness was 15% lower. That\u2019s not just a sales pitch; that\u2019s data from a third party.<\/p>\n

Let me also touch on dressing, because that\u2019s a big pain point for anyone using specialty wheels. With a double row EGC wheel, you have to dress both rows evenly. If you only dress the roughing row, the finishing row will be too high, and you\u2019ll get a weird line on the workpiece surface. Most modern EGC machines have automated dressing systems that can handle this, but if you\u2019re doing manual dressing, you have to mark the wheel first so you don\u2019t over-dress one side. I made that mistake my first year selling these\u2014sent a customer a double row wheel, and when they dressed it unevenly, they blamed me. I went out to their shop, watched them dress it, fixed their process, and we adjusted the guide I sent them. Now I include a quick, 1-paragraph dressing tip with every double row EGC wheel order\u2014no fine print, just \u201chere\u2019s how to make sure both rows stay even.\u201d<\/p>\n

So putting it all together, to answer the original question: Yes, a double row grinding wheel can absolutely be used for external cylindrical grinding\u2014and in a lot of cases, it\u2019s a better choice than a single row. The key is matching the wheel\u2019s abrasive type, grain size, and bond to your workpiece material, making sure your EGC machine has the spindle stiffness and coolant flow to handle it, and taking 2 extra minutes to align and dress the wheel properly.<\/p>\n

I get it, switching from what you\u2019ve always used is scary. I\u2019ve worked with guys who\u2019ve run single row wheels for 30 years and hate trying new stuff. But last quarter, I had a job shop with 5 EGC machines try a batch of double row wheels for their engine component work. After 3 months, they called and said they were ditching 2 of their single row machines entirely because the double row wheels were so much faster and more consistent. That\u2019s the kind of win that makes me love this job\u2014helping guys make their jobs easier, not just selling wheels.<\/p>\n

If you\u2019re reading this and you\u2019ve been eyeing double row wheels for your EGC work but not sure if it\u2019s worth testing, hit me up. I don\u2019t do pushy sales pitches\u2014if your setup isn\u2019t right for double row, I\u2019ll tell you. But if it is, I can send you a free sample (no strings attached, I swear) so you can test it on a few of your parts. I\u2019ve got a track record of helping shops cut cycle time, reduce rejections, and stop wasting money on wheels that aren\u2019t doing what they need to.<\/p>\n

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Don\u2019t overcomplicate this. At the end of the day, double row wheels aren\u2019t a gimmick for EGC. They\u2019re a proven tool for shops that want to get better results faster. All it takes is using them right.<\/p>\n

Aluminium Cutting Disc<\/a> REFERENCES<\/p>\n

    \n
  1. Astakhov, V. P. (2006). Tribology of Metal Cutting. Elsevier.<\/li>\n
  2. Marinescu, I. D., et al. (2007). Handbook of Ceramic Grinding and Polishing. William Andrew Publishing.<\/li>\n
  3. Shaw, M. C. (1996). Principles of Abrasive Processing. Oxford University Press.<\/li>\n<\/ol>\n
    \n

    Yongkang Delun Grinding Tools Co., Ltd.<\/a>
    Yongkang Delun Grinding Tools Co., Ltd. is well-known as one of the leading double raw grinding wheel manufacturers and suppliers in China since 1988. If you’re going to wholesale high quality double raw grinding wheel made in China, welcome to get more information from our factory.
    Address: No.101th Tongtai Road, Zhiying Industrial Area, Yongkang City, Zhejiang Province, China
    E-mail: Sales02@delungrinding.com
    WebSite:     https:\/\/www.delunabrasives.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hey there, grinding gear heads! Let\u2019s cut to the chase today\u2014something I get asked at least … Can a double row grinding wheel be used for external cylindrical grinding?<\/span>Read more<\/a><\/p>\n","protected":false},"author":142,"featured_media":527,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[490],"class_list":["post-527","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-double-row-grinding-wheel-45bb-073579"],"_links":{"self":[{"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/posts\/527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/users\/142"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/comments?post=527"}],"version-history":[{"count":0,"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/posts\/527\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/posts\/527"}],"wp:attachment":[{"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/media?parent=527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/categories?post=527"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ilicoco.com\/blog\/wp-json\/wp\/v2\/tags?post=527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}