As I was grinding on the weekend, I am on the last 2 abrasives; aluminum oxide 9 and 5 micron. It is said that when grinding has been successfully completed, the mirror will feel like the finest satin to the touch, and newsprint can be read through it. It's already unbelievably smooth, and not quite able to read through, but nevermind.
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Click for price. Sometimes the reason that you are looking for a mirror alternative will be due to a lack of space. If you don't have the room to hang a mirror in your bathroom or your bedroom, then maybe you should think about purchasing a door mirror. A door mirror will be able to provide you with the mirror that you need, while not getting in your way.
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Rough grinding. This step is about making one side of the glass concave. It will give your mirror its overall focal ratio. If you make the centre deep, you will end up with a fast telescope (e.g. F/D = 4) well suited for deep sky observations. On the opposite, a shallow mirror (e.g. F/D = 8) will be performing very well on planets and the moon.
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ELSEVIER Journal of Materials Processing Technology 56 (1996) 37-44 Journal of Materials Processing Technology GRINDING OF ASPHERICAL SiC MIRRORS Z. Zhong a and T. Nakagawa b a GINTIC Institute of Manufacturing Technology, NTU, Singapore
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Description: request it can be supplied complete with liquid paste dispenser, while several other optional equipment are available on request. For specific tasks, by using standard abrasive belts, our orbital mirror polishing machine LPC 160 MIRROR is suitable also for grinding and Applications / Materials Abraded: Ceramics / Glass
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Grinding tools can be made of a variety of materials, but most common is glass, plaster, or ceramic. ... over the mirror by hand while the mirror rotates …
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#marblepolishing #oldmarblepolish #marblefloorpolishOld Marble Grinding and Polishing – How To Get Mirror Like FinishHello Guys !! Today in this Video I am g...
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Materials for grinding and polishing comparable to those listed above can be found in Turkey. The largest mirror surface I produced is about 4 by 6 centimeters (1.6 by 2.4 inches). With experience, one could probably select an optimum set of materials to expedite the creation of a mirror surface.
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The curve is ground into the mirror face using a grinding tool. The curve is pre-generated for you. The curve is created by slumping the blank in a kiln over a mold. Here are 42 inch [107cm] and 30 inch [762cm] mirrors slumped and annealed to F2.8 ready for fine grinding.
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A complete material set includes silicon carbide grit #80, #180, #320, Aluminum oxyde with specific flat grit shape and tight size distribution Microgrit WCA 25my, 15my, 9my, 5 my, 3 my, polishing powder CER-SKX (a very fine and pure cerium oxide) and optical pitch of 28° hardness.
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Mirror Grinding Stand (above) The front view and top views show the Mirror Grinding Stand with its wide base (big enough to walk around on), pedestal, and small top. The top is only a little bigger than the largest mirror you wish to grind. The mirror tool is held to the table with three screwed down blocks and six small wedges.
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Mirror surface grinding of different materials by ELID II Fig. 11 shows a comparison of surface roughness for bearing steel rings ground by wheels of different grit sizes. The grinding conditions were: wheel speed 10 m/s, workpiece rotation 150 rpm, traverse speed 40 …
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Making a telescope about 10 years ago was one of the most rewarding projects I've ever undertaken. I ground the mirror and made every other component out of recycled materials as much as possible. This Instructable will cover how to grind a mirror for your telescope - I'll link to other sources for building the other aspects of a telescope.
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Using HDMY-110 and HDMY-200 grinding fluids, we processed optical glass, sapphire, hardened steel, cemented carbide, cermet, PCBN, monocrystalline silicon wafer and other materials to achieve mirror effect. But for steel-bonded cemented carbide, a mirror surface that can reach 13 cannot be processed.
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Once done, wash mirror and tool and inspect the Mirror's surface; For 6 inch mirror I used a glass tool and used above method. For 8 inch mirror, I used a metal flange to hog the center of the mirror. Please note, rough grinding is a very noisy process and people …
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The edges are often equipped with chamfers, made by grinding or milling, typically before the final grinding and polishing is applied. ... Various materials are used for mirror substrates, depending on the requirements. Often used substrate materials are borosilicate glasses like BK7 or fused silica, ...
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Reference 1 provides a number of material-specific automatic grinding and polishing methods. Automatic Grinding The pressure, time, and starting abrasive size depend on the number of mounts being ground, the abrasion resistance of the ceramic, the amount CHAPTER 4
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1. Introduction. Generally, a polishing method is employed to achieve final mirror finish surface of hard and brittle materials, but the loose abrasive slurry used in polishing operation leads to low production efficiency and pollution.Therefore, a polishing-free mirror finish grinding manner has been developed using a superfine diamond grinding wheel instead of this traditional polishing ...
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The authors investigated the mirror surface grinding characteristics of these SiC materials. A comparison on mirror surface grinding characteristics between polycrystaffine SiC and monocrystalline ...
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US1171174A US86695214A US1914866952A US1171174A US 1171174 A US1171174 A US 1171174A US 86695214 A US86695214 A US 86695214A US 1914866952 A US1914866952 A US 1914866952A US 1171174 A US1171174 A US 1171174A Authority US United States Prior art keywords shaft tool slide parabolic axis Prior art date Legal status (The legal status is an assumption and is not a …
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Rough Grinding. Unless the mirror comes pre-generated, the initial curve will have to be ground into the mirror. A ring tool of half the diameter of the mirror used on top of the mirror's flat face with the coarsest grit will rapidly grind a spherical curve into the mirror. Grinding a 6 inch [15cm] mirror to F/2.8 using a ring tool. Mirror ...
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A good starter size is the 150 mm (6") mirror. A 200mm (8") will also work. Most ATM books and websites recommend a Pyrex® mirror blank, but in my opinion, annealed plate glass is better for this first, "learn and practice" mirror.It is cheaper, it is softer …
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Use of a diamond wheel with superabrasive is required for mirror-like surface grinding of brittle materials. However, conventional dressing methods cannot apply to the diamond wheel with superabrasive. Recently, an electrolytic dressing method was developed for use with a cast iron-bonded diamond wheel and superabrasive. This technique can replace lapping and polishing. Using …
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Here is a 25 inch mirror on top of the fine grinding tool with pads applied. And here is the result after 5 hrs of machine polishing starting from a 20 micron aluminum oxide grind. Note that the edge is not as reflective. Materials Needed
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Making A Mirror Grinding Tool By Allen Malsburry The average person would never think, "I can make my own telescope." Most amateur astronomers believe, "I can buy a better ... make the "tool" using less expensive materials. Here is how to make the grinding tool. 1. Trace the outline of the blank on a section of 3/4" tiles with a
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Grinding Motion • Move mirror back and forth over tool & grinding compound • After number of strokes rotate mirror, tool in opposite direction • Change position of stroke alternatively • Eventually move fully around the mirror • Grit removes material from both • But …
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Got Grit Supplies inexpensive grinding and polishing materials, as well as thin mirror blanks. Salem Distributing Co. Supplier of mirror grinding and polishing materials, including Microgrit and Gugolz pitch. Newport Glass This site provides kits and materials for …
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Grits, typically of Silicon Carbide or Aluminum Oxide, in various grades, are used as an abrasive between the mirror and tool to grind the glass. Pitch is used to make a soft, conforming pitch lap for polishing and figuring. It is used with a Polishing Compound such as Cerium Oxide, which is actually a very fine, smooth abrasive.
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Nowadays telescope mirrors are made from glass which is ground into shape before receiving a reflective coating, but the hand-grinding techniques are similar to those that would have been used for speculum metal mirrors. In fact, metal mirror grinding itself developed out of the materials, tools and techniques used for grinding spectacle lenses ...
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Page 1 of 2 - Grinding your own mirror - How is it possible to get accuracy in the nm? - posted in ATM, Optics and DIY Forum: So I have read forum questions & answers on topics such as whether it is possible to use a 3D printer to design and print out a telescope mirror, or design an array of paraboloids this way for a segmented design, and the answers have been, no, the 3D printers dont …
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Tools for grinding, polishing and machining various materials. Vitrified. Ceramic Grain CX Wheel. Vitrified-bonded Wheel for Gear Grinding "Gear Ace". New Super-finishing Wheel "Keen Stone". Vitrified-Bonded Wheel for Precision Grinding "LIFE KING". New Mirror Grinding Super-finishing Wheel "Mr. Neo Lapper". Resinoid.
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Silicon Carbide is a hard, sharp, angular material primarily used for rough grinding. Under pressure, it fractures into smaller angular particles, and hence is an aggressive abrasive that removes a lot of glass quickly. Carbon gray in color. Aluminum Oxide is a hard, rounded material primarily used for fine grinding. It typically does not ...
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Grinding and polishing Material: Grinding and polishing compounds I have nearly always in stock. A complete material set includes silicon carbide grit #80, #180, #320, Aluminum oxyde with specific flat grit shape and tight size distribution Microgrit WCA 25my, 15my, 9my, 5 my, 3 my, polishing powder CER-SKX (a very fine and pure cerium oxide) and optical pitch of 28° hardness.
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I'm selling surplus materials for mirror grinding to include the following: 3 pounds #60 Silicon Carbide from Willmann-Bell, Inc. 1-inch Hex Ceramic Unglazed Tiles from Willmann-Bell, Inc. (approximately 144) Closeable Glass Jar labeled #60 Silicon Carbide to safely store abrasive Salt Shaker
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PeteDCard81, on 21 Jun 2021 - 10:11 AM, said: The Hubble primary mirror was designed to the correct specification (parameters) but ended up misshaped because of an incorrectly assembled null optics test tool. This test tool was acquired from the Perkin Elmer side of the shop that did work on Defense projects.
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I'm selling surplus materials for mirror grinding to include the following: 3 pounds #60 Silicon Carbide from Willmann-Bell, Inc. 1-inch Hex Ceramic Unglazed Tiles from Willmann-Bell, Inc. (approximately 144) Closeable Glass Jar labeled #60 Silicon Carbide to safely store abrasive Salt Shaker
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