mirror grinding materials

Stellafane ATM: Materials & Tools

Topics on this page: Mirror Blanks, Grinding & Polishing Tools, Grits & Pitch, Storage Containers, Grinding Stands, and Miscellaneous Items. 6" & 8" Pyrex Mirror Blanks Patterns on surfaces and edges are mold marks, splotch on 6" is a grinding mark by the manufacturer.

Mirror grinding - scope making

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 and grinds faster, needing less abrasives and with these small sizes, the low expansion glass like Pyrex has no practical (visible at ...

Joy of Mirror Making: Rough Grinding - BBAstroDesigns

31 行 · The curve is ground into the mirror face using a grinding tool. The curve is pre-generated for

Newport Glass Works, LTD. Grinding, Polishing and Figuring ...

Placing the mirror face up and grinding with a moderate "W" stroke will also move the curve toward the edge, and tends to produce a more spherical surface. Leaving the mirror grossly hyperbolic will make fine grinding difficult. Fine Grinding . We've all heard stories about fine grinding taking hundreds of

tut44 Making A Mirror Grinding Tool - Asterism.org

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

Study on axial-feed mirror finish grinding of hard and ...

Jan 01, 2011 · 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 ...

Telescope Mirrors, Blanks, Secondaries, Grinding Materials ...

GRINDING AND POLISHING MATERIALS Aluminium oxide grinding powder per kilo $40AUD Tin oxide grinding powder per kilo $30AUD Pumice grinding powder per kilo $30AUD 80 Grade grinding powder per 8" mirror $2AUD 120 " " $2AUD 220 " " $3AUD 320 " " $4AUD 500 " " $6AUD 1000 " " $8AUD 1600 " " $8AUD Cerium Oxide " $8AUD Lap resin kit " $15AUD

Optic Wave Laboratories - Optical Coatings

Optic Wave Labs offers the services of its in-house coating facility to the public. We provide standard aluminum , semi-enhanced aluminum, enhanced aluminum, gold and silver coatings. Our automated deposition system can accommodate telescope mirrors up to 22 inches in diameter. We coat new mirrors as well as re-coat your existing mirror.

Newport Industrial Glass Inc.

NEWPORT GLASS WORKS, LTD. & NEWPORT INDUSTRIAL GLASS, INC., AQUATIC OPTICS, INC., TUBING AND ROD DIVISION (fka HACKER GLASS COMPANY), TELESCOPE KITS, TELESCOPE MIRRORS, OPTICAL GLASS, MOLDED GLASS BLANKS, GLASS BENDING, PRESCRIPTION DIVING LENSES & SAGGING, COLORED FILTER GLASS, FUSED SILICA & QUARTZ, BK7, SECONDARY MIRRORS, GRINDING

Mirror surface grinding for brittle materials with in ...

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.

Joy of Mirror Making: Rough Grinding - BBAstroDesigns

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.

Mirror grinding materials (SOLD) | Astromart

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

Study on axial-feed mirror finish grinding of hard and ...

Jan 01, 2011 · 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 ...

Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...

* Thin plate glass mirror blanks are lighter than standard mirror blanks, which allows you more flexibility in designing your telescope tube assembly and mount. * When grinding a telescope mirror, you will find that plate glass takes less time to grind and polish than a mirror made from borosilicate glass. Please see the Buy Telescope Mirror Blanks

Telescope Mirror Kits - Firsthand Discovery

Please note that our kits do not include a grinding tool or pitch lap. If you need materials for making a grinding tool or pitch lap, we have them available on our Tools page. A second mirror

Making a homemade mirror grinding machine - ATM, Optics ...

Mar 06, 2006 · Gordon will know more about the math for different mirrors and different sizes. I recall for mine it was about a 70% tool diameter. The bucket Gordon used to make the tile tool was 8 15/16", 70% of 12.5" ends up at 8 3/4". Looking back at my notes I used the tile tool primarily at the 70% zone of the mirror.

How to Build a Telescope

This will be used during grinding to monitor the mirror shape. Also obtain and keep a gauge to measure say ¾ of the required sagitta. In this connetion note that a 10 p coin is about 1.70 mm thick, a 25p coin about 1.08mm thick and a 50p coin about 1.37 mm thick. 1.4 Summary of materials required and procedure to be followed

How mirror is made - material, manufacture, making ...

The initial step in mirror manufacture involves cutting and shaping the glass blanks. Cutting is usually done with a saw with diamond dust embedded in the tips. Next, the blanks are put in optical grinding machines, which use abrasive liquid plus a grinding plate to produce a

4 Practical and Convenient Mirror Alternatives

Related: Small Mirrors for Home | Fantastic Bathroom with Two Mirrors 1. Acrylic Mirrors. Click for price. Acrylic mirrors are actually the most well-known mirror alternative on the market. People often use these types of mirrors in the place of glass mirrors. The item being shown here is an acrylic mirror

Mirror surface grinding of sapphire by coarse grain size ...

This paper discusses the grinding of sapphire for mirror surfaces by coarse grain size diamond wheels. Sapphire is a hard-to-machine material because it has excellent mechanical properties and ...

Metallographic grinding and polishing insight | Struers

Fine grinding produces a surface with little deformation that can easily be removed during polishing. Because of the drawbacks with grinding papers, alternative fine grinding composite surfaces are available, in order to improve and facilitate fine grinding, A high material removal rate is obtained by using grain sizes of 15, 9.0 and 6.0 µm.

Parabolic Mirror Grinding Machines | Products & Suppliers ...

Products/Services for Parabolic Mirror Grinding Machines. Grinders and Grinding Machines - (984 companies) Grinders and grinding machines use an abrasive that is bonded to a wheel, belt or disc to remove material and improve surface finish. Devices can be pneumatically driven or powered by a combustion engine or electric motor.

Investigation on mirror surface grinding characteristics ...

The authors investigated the mirror surface grinding characteristics of these SiC materials. A comparison on mirror surface grinding characteristics between polycrystaffine SiC and monocrystalline ...

Basics of Mirror Grinding - Brown University

Composite Materials Up: RAB 2004 Report: Construction Previous: Introduction Basics of Mirror Grinding Glass mirrors are typically ground from a blank, or cylindrical piece of glass, using the abrasion created by moving the mirror across a second glass blank (the tool) which is covered with silicon carbide or aluminum oxide grits.

Ultra-Precise Mirror Polishing - Cactus Materials

Cactus Materials, Inc. provides nano-level ultra-precision mirror polishing services to not only further improve the quality of our ceramic products, but we can also process other materials such as metals, glasses, resins, and semiconductor materials as well, on

Analysis of Mirror Surface Generation of Hard and Brittle ...

Jan 01, 1995 · Analysis of Mirror Surface Generation of Hard and Brittle Materials by ELID (Electronic In-Process Dressing) Grinding with Superfine Grain Metallic Bond Wheels Hitoshi Ohmori, Takeo Nakagawa (1) Institute of Physical and Chemical Research, Tokyo, Japan Received on January 10,1995 Abstract Mirror surface grinding operations were conducted by using ultrafine grain metallic bond

Grinding it Out - Archaeology Magazine Archive

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.

Joy of Mirror Making: Polishing - BBAstroDesigns

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

Grind and Polish a Dobsonian/Newtonian Telescope Mirror ...

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.

Valve Grinding Materials | Larslap Systems

Diamond material is available as permanent grinding plates and heads as well as disposable adhesive paper and grinding paste. It is available in uniform grits, each grain being exactly the same size. If a mirror finish on the seat is required, special adapters can be

mirror grinding kit grind and polish telescope mirror at ...

All our Mirror Kits contain a Pilkington Float Glass mirror blank and Grinding Tool. These arefinished with fine ground edges. 180 grade first stage ginding powder. 400 grade ginding powder. 303 grade smoothing powder. Top quality Cerium Oxide Polishing powder.

Telescope Mirror Blanks / TelescopeMirrorBlanks.Com ...

Telescope Mirror Blanks Providing telescope mirror blanks and kits to telescope makers. Mirror blanks are individually tested for internal strain. Plastic protractor inserted under a 6 inch mirror blank during a stress test, to illustrate what stress would look like - if there were any present.

4 Practical and Convenient Mirror Alternatives

Related: Small Mirrors for Home | Fantastic Bathroom with Two Mirrors 1. Acrylic Mirrors. Click for price. Acrylic mirrors are actually the most well-known mirror alternative on the market. People often use these types of mirrors in the place of glass mirrors. The item being shown here is an acrylic mirror

Mirror Grinding Machine, G. W. Ritchey | National Air and ...

George Willis Ritchey built this mirror grinding machine at the Yerkes Observatory in Williams Bay, Wisconsin, in the late 1890s. Under the sponsorship of George Ellery Hale, the machine was used to grind a series of telescope mirrors starting with a 24-inch and then a 60-inch mirror for a telescope initially intended for the Yerkes Observatory.

Lens & Mirror Making Best lenses and mirrors are both made ...

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 tool edges wear down, while mirror

Stainless steel polishing, grinding and finishing tools ...

Stainless steel polishing and grinding is known as one of the most difficult projects. This is because most stainless steel polishing requires a mirror-like finish devoid of even the slightest of scratches or pinholes. The polishing process usually consists of 3 to 7 (or

Study on ductile-mode mirror grinding of SiC ceramic ...

Aug 01, 2015 · When the grain cutting depth decreases to the critical cutting depth or even less, the brittle-mode grinding is changed into ductile-mode grinding, leading to ground mirror surface of hard and brittle material. (4) Decreasing the feed rate to 10 mm/min may realize ductile-mode mirror grinding.

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