{"product_id":"lambda-two-piece-aluminum-copper","title":"Lambda Two Piece (Aluminum \u0026 Copper)","description":"\u003ch2 class=\"highlight-text\"\u003eThe \"original\" ruby-tipped spin tops: crafted without compromise\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eKickstarter Original : \u003c\/strong\u003eThis is the original design from my Kickstarter project. I still think it's the best. For me good design is all about balance and simplicity. \u003c\/p\u003e\n\u003cp\u003eMaking a good two-piece top is also exceedingly difficult. I retired the design for over a year and spent hundreds of hours prototyping to maximize consistency and performance. The tolerance level on both the spindle diameter and bore of the ring are necessarily held to +\/- 0.0001 inches...basically the minimum tolerance the lathe is capable of.\u003c\/p\u003e\n\u003cp\u003eHolding this tolerance requires inspecting every 5 parts to make sure the machine is on size. Over the course of the day, the machine will drift up to .002 inches as air, machine and coolant temperature changes. You'll note this is 20x the allowable deviation. Making parts this precise comes at a cost. \u003ca href=\"http:\/\/blog.cnccookbook.com\/2017\/04\/29\/the-high-cost-of-tight-tolerances\/\" target=\"_blank\" title=\"the high cost of tight tolerances\" rel=\"noopener noreferrer\"\u003eIf you'd like to geek out you can refer to this article on \"The High Cost of Tight Tolerances\" on the CNC Cookbook blog.\u003c\/a\u003e \u003c\/p\u003e\n\u003cp\u003eEven with all this effort, the simple act of mating two separate parts together always introduces some amount of error and imperfection. What most makers won't tell you, is you might get a \"perfect\" top...but you might not. It's become clear that performance falls within a statistical distribution and making every top absolutely perfect simply isn't a realistic expectation. That said, the new two piece top should (on average) spin even better than the original, and that's why I'm bringing back. This is as close to perfection as my current skills, knowledge, and equipment allow. \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"highlight-text\"\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e The C145 TeCu (Tellurium Copper) used in this variant is copper alloyed with .5% Tellurium for hardness and machinability\u003c\/span\u003e. C145 is a \"free machining\" material, which means it machines VERY consistently. Materials are rated for machinability on a 100% scale. C145 is approximately 85%. Tougher materials resist cutting which wears the tool faster and leads to less uniformity and \"out of tolerance\" conditions. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan class=\"highlight-text\"\u003eThe 6061 aluminum spindle\u003c\/span\u003e is strong, light weight, and raw machined aluminum. I normally nickel plate all of my aluminum parts, but it's just not necessary here. I also really like the contrast of the \"cool-colored\" aluminum next to the warm brass.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"highlight-text\"\u003e\u003cstrong\u003eContact Point Options:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eFor complete information, please see the \"contact points\" tab on this page. \u003c\/span\u003eOf course the ruby\u003c\/span\u003e is the ultimate in performance and awesome...can't beat that combination. It's a little bit fragile if you compare it to a Mac truck, but a little bit of knowledge and care will keep it spinning for a lifetime. I mean, it's nearly as hard as diamond and those are \"forever.\"\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan color=\"red\" style=\"color: red;\"\u003e\u003cstrong\u003e\u0026gt;\u0026gt;\u0026gt; Broken contact balls are not covered under warranty. NEVER drop the Lambda top onto a tile or granite surface or the ball may shatter.  Contact points can be replaced in tops that have hollow spindles (all current models)...assuming there isn't other significant damage to the top. \u0026lt;\u0026lt;\u0026lt; \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong-blue\u003eHazardous Spin Surfaces:\u003c\/strong-blue\u003e A granite (or tile) counter top is MUCH harder than steel. That means if you drop it on a granite or tile counter top there is a significant chance of damaging the instrument ruby. Please remember, this is not a toy, it is a precision instrument and must be treated as such.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong-blue\u003eSpin Surface Hazards: \u003c\/strong-blue\u003eGlass is fairly soft, and the ruby will probably shatter glass before the ruby breaks. So if you drop your top onto a mirror or a glass table top it will impact with a TINY amount of surface area and magnify the force. I have not personally experienced this, nor have I heard of it happening, but it's still something to keep in mind.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2 class=\"accordion\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/CLICK-FOR-INFO_2ac06d68-f3cf-4897-b6e9-0085a5cb647d_large.gif?v=1494270115\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003cdiv class=\"inner\" style=\"text-align: left;\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/1_31760cbd-621f-4baf-88d0-0b850a9dc4e5.jpg?v=1487178197\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eTo be honest, I'm just as surprised as you are. My friend Joe, from Scout Leather Co., has been telling me for months that I should make a top. My response was always, \"I make tools, not toys.\" But I was intrigued. Who doesn't like tops, right?\u003c\/span\u003e \u003cspan class=\"available\"\u003ePlease check out the Kicstarter video just below :)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"600\" height=\"338\" src=\"\/\/www.youtube.com\/embed\/K0Gl2AEyNJo\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eOne afternoon I had a few hours to play around on the lathe. I had no plan, I was just cutting a top free-hand on the lathe. No measurements, no design drawings. Instead of cutting a cone for the tip, I dug around in an old project box and came up with a ruby sphere I bought for another job. The first time I spun the top it was obvious that I created something totally different in performance and physics from anything I had seen before.  I showed the prototype to a few people and the most common response was, \"Wait, it's still spinning? Are you sure? It doesn't look like it's moving.There is no way it's still spinning.\" No one else had seen anything like it either. I thought that was pretty awesome, and I believe awesome is worth sharing. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"text\"\u003e\u003cspan class=\"highlight-text\"\u003e\u003cstrong\u003ePackaging:\u003c\/strong\u003e \u003c\/span\u003eEvery Lambda comes in a snap-top box that serves double duty as a storage container and a display stand. Please be careful when you \"present\" this top to someone. You might preface the gesture with, \"So I'm NOT asking you to marry me right now. I just want to show you this top.\" Or if you \u003cstrong\u003eare\u003c\/strong\u003e actually going to use the Lambda as a token of your everlasting commitment...then you are the most awesome person ever. Send me photos.\u003c\/p\u003e\n\u003cp class=\"text\" style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/2_a9b8ffcb-3ae4-4563-b5ab-0c0f1de91091.jpg?v=1487178216\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/3_61218857-4c71-4a01-958c-e3c9d27be8bf.jpg?v=1487178230\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eIf you know my work, you know I don't mess around. The Lambda is not intended to be a record breaker, but rather an expression of how I see the world: the ideal balance of performance, physics, and aesthetics. However, you are going to have a really hard time finding something is the same size\/weight class that will outspin this top. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003e\u003cstrong\u003eEnough chit chat; I present the Prometheus Lambda top.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ciframe width=\"600\" height=\"338\" src=\"\/\/www.youtube.com\/embed\/tZEvvofzviQ?rel=0\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e \u003cstrong\u003eYes this is a video\u003c\/strong\u003e...it's not a still image! If you stared at it for a few seconds and then said \"woaaah,\" we are on the same page. Welcome to my project :)  \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/4_372c2087-550d-4cf4-bcda-d3002708fc9a.jpg?v=1487178247\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/5_61272fb7-fe5c-4979-bbb2-a90d36f0749b.jpg?v=1487178271\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eThe secret ingredient (beyond a solid design based on Newton and \"the physics\") is the \u003cstrong\u003einstrument-grade ruby sphere\u003c\/strong\u003e. You heard me right, I said \u003cstrong\u003eruby\u003c\/strong\u003e. This type of manufactured ruby is used in things like Rolex watches, super-precision measuring instruments, fiber optic transmission lines, and other really expensive and\/or sciency stuff. The hardness is 9 on the Mohs scale. Diamond is one of the few harder materials and scores a perfect 10. That alone is awesome! \u003c\/span\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003ciframe width=\"600\" height=\"338\" src=\"\/\/www.youtube.com\/embed\/-PuQwSSYfUY?rel=0\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003e\u003cstrong\u003eFrom the manufacturer:\u003c\/strong\u003e \"This material has five times more abrasion resistance than carbide, zero porosity, high temperature tolerance, extreme chemical resistance, and extreme hardness.\"\u003c\/span\u003e \u003cspan class=\"text\"\u003eI know, I know. How tough is it? THIS tough. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eThe video shows a ruby smashed between the steel top of my bench-vise and a 16oz. steel-faced dead blow hammer. Yes, I hit it really hard. Yes, it did break. It's tough...not indestructible. Just treat it like a ruby and you should be fine. If you treat it irresponsibly...it will break, as demonstrated above :)\u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003eAs before, avoid spinning on (or near) tile and granite surfaces, both of which have a higher surface hardness than steel. A significant impact (on something that hard) can shatter the ruby. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/products\/SOLID-TOP-HOLE_grande.jpg?v=1480978354\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's up with the hole in the spindle? \u003c\/strong\u003eThat is 100% physics right there. Brass is more dense than aluminum; and making a top out of solid brass moved the CG (Center of Gravity) slightly higher when compared to the aluminum top. If the CG is too high the top will not want to stabilize. I tried a number of strategies to lower the CG on the top.\u003c\/p\u003e\n\u003cp\u003eNothing was working very well and I had the idea to drill out the core of the top \"just to see what would happen.\" Like the discovery of Champagne, it was a happy accident. I'm a scientist at heart, and that is one perfect, beautiful 0.160 x 1.25\" hole because it's EXACTLY what was needed to drop the CG right into the sweet spot for a perfect spinner. I bet you start to see this one on \"other\" tops out there in top land. It didn't take long for people to catch on to the ruby thing right? I don't mind that (much) but there's still some value in life for being the \"original.\" At least that's what I tell myself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThrough the looking glass:\u003c\/strong\u003e Is awesome a feature? Yeah, awesome is a feature. One additional feature of the Lambda Solid is you can look right through the ruby. This shot is taken looking down the hole in the stem of the top, not looking at the bottom. I've gotten a lot more enjoyment out of watching the ruby sparkle when you hold it up to a light; and I think that's one major thing that was missing from the original two-piece Lambda.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eAnother added benefit of the hollow spindle is that any contact point can be replaced...assuming there isn't other significant damage to the top.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/7_99094eb6-62d0-4913-9db8-a94bb921f031.jpg?v=1487178307\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cspan class=\"subhead\"\u003eSphericity: \u003c\/span\u003e\u003cspan class=\"text\"\u003eThe \"sphericity\" of the Lambda's Grade 25 ruby is 25 millionths of an inch. Take an inch. Divide it into one million (1,000,000) slices. The amount of error is less than 25 slices...out of a million. The majority of machined parts are manufactured to within about 0.001 inches. I created the chart below to make blowing your mind easier on your brain. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/8_f68f5ae7-4edf-4bd8-aac6-4b5901da9154.jpg?v=1487179197\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eYes, I know that's not \"perfectly\" round, but it makes for good reading right?\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"subhead\"\u003eSurface Smoothness:\u003c\/span\u003e \u003cspan class=\"text\"\u003eBelow is an electron micro-graph that will give you a reasonable comparison between a metal \"machined\" surface and the surface of an instrument ruby. The image on the left is the ground edge of a razor blade. This is probably a much smoother finish that you will see with machining. However, compared to the surface of a ruby sphere at the same scale, it looks like the Grand Canyon. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/9_aa7d75f7-cfcb-41cc-b6bf-0331569295db.jpg?v=1487182054\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/10_617739bf-82eb-4b37-8d19-743f9477e739.jpg?v=1487182073\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eLet's agree to call it a cone. A cone isn't a very good shape for the contact point because you are always on one side of the point...or the other. This means the top will have a hard time balancing upright, wasting energy during the early spin, and then falling over early during the late spin when the top is losing RPM. It's inherently imprecise. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"600\" height=\"338\" src=\"\/\/www.youtube.com\/embed\/JhBx7IVKwu8?rel=0\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eThe perfect sphere means there is always a perfect point of contact with the surface, wasting less energy and spinning longer. It also means the Lambda is better able to spin along its axis; therefore, it does not exhibit the large amount of precession (angular wobble) that you see in a traditional top (above). \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/11_9861a4bd-d3ba-466d-aeec-266c87478e6b.jpg?v=1487182096\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eThe Lambda name is derived from the Greek letter \"L\" which is the physics symbol for angular momentum; the Newtonian principle that keeps a top from falling over. I'm not a physicist, but I\u003c\/span\u003e\u003cspan class=\"text\"\u003edid stay at a Holiday Inn Express at some point during college. Here we go:\u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"subhead\"\u003eANGULAR MOMENTUM (L) = RADIUS (MASS x VELOCITY)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eThis equation is all you need to know about tops. For a given top, the size (radius) and weight (mass) are fixed, so your only variable is velocity. If you want more spin, you need more speed. How fast can you spin it? \u003c\/span\u003e \u003cspan class=\"text\"\u003eThe (major) factors that reduce spin time are friction and the geometry between the top's \"contact point\" and the target surface. You get to pick the surface, but I get to pick the contact point :)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"subhead\"\u003ePOLAR MOMENT OF INERTIA (\u003cem\u003eIp\u003c\/em\u003e) = \u003cem\u003ep\u003c\/em\u003e(r)r^2\u003cem\u003ed\u003c\/em\u003eV\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eDon't sweat the details. That just means a unique feature of the Lambda is the use of 2 different materials in the design. It looks awesome and it increases performance. \u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"text\"\u003e6061 aluminum is used for the spindle to decrease the polar moment of inertia...in other words, reducing the amount of force it takes to get the top up to a given velocity. If you remember, the more velocity the more angular momentum...and a longer spin time. \u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"text\"\u003eSolid brass is heavy, really heavy. It also machines beautifully. If you recall, mass is another important component to angular momentum, making brass an ideal material for the outer ring. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/12_dc744d82-7d07-4f5e-bf5a-1a3e017cdcd2.jpg?v=1487182112\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eIt depends...on a lot of different factors. How long \"will\" it spin is entirely up to you. How long \"can\" it spin is entirely unknown. My personal record (unofficial) is over 12 minutes. Check out the video below for a \"bar-setting\" unedited 10 minute spin. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eCan you beat me? It's gotta be on video! \u003ca href=\"https:\/\/www.youtube.com\/watch?v=que9olapZNo\u0026amp;list=UUEdJeiDK2r7DMJTLZchkmKQ\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSubmit your \"video response\" to my 10 min spin on the YouTube page (link)\u003c\/a\u003e ! \u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"600\" height=\"338\" src=\"\/\/www.youtube.com\/embed\/que9olapZNo?rel=0\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cspan class=\"text\"\u003eYour spin-time can (and will) vary. However, I'll leave you with the guesstimates below. These are based on my personal experience, and observation of other people testing the Lambda. If you can't seem to hit the numbers below, give it a little more \"wax on, wax off!\" That means \"practice\" in case The Karate Kid was after your time. Not the new one, the old one :) \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong class=\"highlight-text\"\u003e6 Minutes:\u003c\/strong\u003e Most people should be able to hit this without trying too hard. You have to have a good surface where the top can actually stay on it for that long. Try a plate or bowl to keep your top from falling off the table. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong class=\"highlight-text\"\u003e8 Minutes:\u003c\/strong\u003e \u003cspan class=\"text\"\u003ePut in a little practice and 8 minutes can be reached...some of the time. This was the first big milestone. To go past 8 minutes you have to have a good surface...and good technique. At this point I can break 8 minutes almost every time.\u003c\/span\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong class=\"highlight-text\"\u003e10+ Minutes:\u003c\/strong\u003e \u003cspan class=\"text\"\u003eIf you practice a lot, you'll start seeing spins over 10 minutes...but that is\u003cem\u003every\u003c\/em\u003e hard to do. Even now, I might get 1 out of 5 spins that are over 10 minutes. \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eJust keep in mind that trying for a long spin is \u003cstrong\u003eone\u003c\/strong\u003e way to enjoy your Lambda, but it's not the \u003cstrong\u003eonly\u003c\/strong\u003e way! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/13_c3e1dbbe-d386-49ec-b5cd-595aabedba57.jpg?v=1487182130\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eI tested a lot of different surfaces in search of the best one. I tried marble slabs, granite surface plates, glass dinner plates, ceramic bowls, various mirrors, optical lenses, and chemistry lab glass.\u003c\/span\u003e \u003cspan class=\"text\"\u003eThe Lambda may spin for so long that you won't have a flat enough surface unless you work in a laboratory or machine shop. After a couple minutes it will \"drift\" and eventually fall off the edge. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eThe best thing to use is any kind of concave dish. However, I had a hard time finding anything in my kitchen where the center of the plate\/bowl was actually the lowest part. Most had a raised or uneven area in the middle and this throws off the top. \u003c\/span\u003e\u003cspan class=\"text\"\u003eRight now my favorite surface is a little 5\" shaving mirror (12x magnification) that you can\u003ca href=\"http:\/\/www.amazon.com\/gp\/product\/B009MLSJ38\/ref=oh_details_o01_s00_i00?ie=UTF8\u0026amp;psc=1\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ebuy from Amazon\u003c\/a\u003e. It's a reasonable size, is fairly durable (for a mirror) and has a flat back so you can set it on a table. The smooth curve of the mirror means you don't need a perfectly flat surface, the top will naturally find the lowest point. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/14_6e8529eb-394d-42eb-9d5f-bbc20294f93b.jpg?v=1487182146\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003ePlease keep the weight and diameter in mind when comparing tops. These details can be found on the \"specifications\" tab. Ignoring other factors, increasing the mass and\/or diameter will increase the potential spin time. That's just physics. A big top will spin longer than a small one. A heavier top will spin longer than a light one. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan class=\"subhead\"\u003eMaterials: Brass ring, aluminum spindle, ruby tip\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"text\"\u003eSome of the photos show a black ring. This was an early prototype and \u003cstrong\u003enot offered as an option\u003c\/strong\u003e. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/15_ebd10c28-a220-4c70-acb5-f88862cab4f3.jpg?v=1487182164\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/16_337beefd-c16f-4054-b8a7-367b873778c7.jpg?v=1487182180\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eMy prototype tops are manually machined on my Hardinge HLV-H toolroom lathe. Check out the video below for a quick montage of making the very first Lambda top. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"600\" height=\"338\" src=\"\/\/www.youtube.com\/embed\/JaV-FNW_Ge0?rel=0\" frameborder=\"0\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text\"\u003eThe Lambda top is made in-house on the Haas CNC lathe I purchased with the funds from my first KS campaign. All of the raw materials, including the instrument-rubies, are domestically manufactured. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/files\/17_dd69b7fc-8de4-476a-90b6-ee10fd3574e8.jpg?v=1487182199\" style=\"float: none;\"\u003e\u003c\/p\u003e\n \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Prometheus Lights","offers":[{"title":"Default Title","offer_id":93802856473,"sku":"L2PC-ALCU-RB","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1356\/1883\/products\/2pc-COPPER.jpg?v=1528841589","url":"https:\/\/darksucks.mom\/products\/lambda-two-piece-aluminum-copper","provider":"Prometheus Lights","version":"1.0","type":"link"}