Steel Cutting Tools

cutting 2×8 and 2×4 with demascus chopper

Author: admin

Testing heat treatment, edge geometry, toughness of this Damascus competition cutter. This is a BladeSports International legal cutter.

Mesothelioma Law Firm Video Game Rental Conference Call Service

Tags: Chopper, Cutting, demascus
January 22nd, 2012  |  Posted in Steel Cutting Tools  |  Comments Off

Lab-Created Diamonds – Simulated Diamonds And Manufactured Diamonds Review

Author: admin

There has been a great deal discussion about lab-created diamonds. Along with that talk, there is much misinformation and perplexity. The jewelry lover, who is interested in realizing the huge savings and aesthetic beauty that simulated diamonds offer, is often bewildered by the manufactured diamond industry jargon and available options. This article will categorically break it down in easy-to-understand terms so that anyone can make an intelligent decision when choosing a simulated diamond.

GEM MATERIALS: 99% of all lab-created diamonds sold worldwide are polycrystalline on a molecular level. The differences are fundamentally in the technical aspects of manufacturing, cutting, and polishing. Think of it this way–all coffeemakers are made of plastic, steel, and glass, the differences are how these materials are designed and implemented. Higher quality coffeemakers make a better tasting cup of coffee. Higher quality manufactured diamonds are in line with mined diamonds.

QUALITY VARIANCES: It seems like grade variations are made out to be a more complex lab-created diamond issue then it really is. Once boiled down, there are three primary grades of simulated diamonds–high, medium, and low. For the jewelry shopper it should be noted that the quality of setting goes hand-in-hand with the quality of the gemstone. Those that sell manufactured diamond jewelry off point-of-purchase displays in the costume jewelry sections of discount stores use low quality or scrap stones that are not gem quality, and have disco ball or murky look. Those that sell manufactured diamond jewelry on the TV shopping channels–which is generally with a sterling silver or a micro-thin layer of gold plated over silver (Vermeil [pronounced ver-may]) settings–use medium quality stones not of gem quality. Those that sell solid 14K gold or solid platinum settings, as a rule, use the highest gem-quality man made gemstones that replicate mined diamonds.

PRICING: Low grade stones are sold in bulk to costume jewelry makers and are often glued on electroplated settings. This jewelry is fine for children, where loss risk is high, and usually retails for less than $15 per item. You will find medium grade stones primarily in sterling silver jewelry that sells for under $100 per item, settings and stones. Medium grade simulated diamonds can be distinguished by the naked eye as not being mined diamonds. High grade gemstone quality lab-created diamonds, undistinguishable by the naked eye from mined diamonds, are found mounted on settings of solid 14K gold and platinum. This is considered to be fine jewelry, with the best quality gemstones selling for under $100 per carat for the gemstones alone. Manufactured diamonds that sell for over $100 a carat are not higher quality than those that sell for between $80 and $100 per carat.

RECOMMENDATIONS: If you are buying for someone that is likely to lose the jewelry, there is no reason to spend any more than you have to, and Wal-Mart will do just fine. On the clearance rack you can even pick up some jewelry for less than $5 per item. If you buy simulated diamonds set in sterling silver, expect decent stones, but they will fool few into thinking they are mined diamonds. Also, your fingers are likely to turn green or black in response to a chemical reaction, not with the silver per se, but with the nickel/copper alloys in sterling silver. With any plated settings, gemstones are low to medium grade, and the plating will eventually chip off, particularly around the edges. When that happens, the nickel/copper alloys will be exposed, the setting will look like it came out of a gum ball machine, and your finger will generally turn green or black. It is just a matter of common sense, if you want simulated diamonds with mined-diamond qualities, they must be set in 14K solid gold. Jewelers who offer lab-created diamonds are not going spend on money on gold and not mount the highest quality stones, which would defeat the purpose of creating fine diamond-like jewelry and alienate customers.

Yoda Quotes Apache Ant

Tags: Diamonds, LabCreated, Manufactured, review, Simulated
January 20th, 2012  |  Posted in Steel Cutting Tools  |  Comments Off

TOOL BIT GRINDING #3 South Bend Clausing cossack Lathe tubalcain

Author: admin

Tubalcain explains the angles of a 60 degree tool bit which will be used to cut threads on a lathe. Also covered are several different types of commercial threading tools such as ALORIS & ARMSTRONG.

Buy Shower Curtain Hooks

Tags: Clausing, cossack, Grinding, tubalcain
January 16th, 2012  |  Posted in Steel Cutting Tools  |  Comments Off

Understanding of Steel Rebar Sizes and Rebar Grades

Author: admin

Today Steel is the most admired building material across the globe and is used in a variety of residential, commercial and industrial structures; from tall skyscrapers to huge sports stadium to homes and shopping malls. Steel beams and especially steel rebars have found extensive usage to provide strength to the building structure. Concrete is basically high density material and has less strength when applied tension. To counter this problem, steel rebar sticks are used to carry the tensile loads in a composite structure. Masonry elements like bricks and blocks are made with strategically placed cavities to accommodate rebar sticks. Huge structures like bridges, dams, garages, jetties where strength under tension is of utmost importance steel rebar sticks are used almost inevitably.

Welding and Bending of steel rebar sticks into custom shapes for fixing them into the brick or block is normally performed by expert reinforcement fabricators or rebar detailers. Cutting and Bending of steel rebar is a complex procedure and requires precision to render greater stability to the structure. The expert rebar detailers uses latest software technologies like Tekla, Revit, AutoCAD and web-based tools to provide accurate rebar shop drawings as per the needs of structure or building. The accuracy of bending operations is crucial to ensure that they fit correctly at the construction site and at the same time keep necessary lap lengths and anchorage length.

Rebar size is one of the decisive factors when creating shop drawings for a structure or a building. Two conventions are being used in steel industry for rebar sizes – Imperial sizes and Metric sizes. Imperial bar method (USA convention) represents rebar diameters in fractions of 1/8 inch, such that #8 = 8/8 inch = 1 inch diameter. Metric bar method (Canadian convention) represents the rebar diameter in millimeters, rounded to the nearest 5 mm.

Standard Metric sizes for steel rebar are 10, 13, 16, 19, 22, 25, 29, 32 and 36.

Rebar is available in various grades that differ in tensile strength, absolute strength, chemical composition and elongation (in %). The grade given is equal to the minimum absolute strength of the rebar in ksi (1000 psi). For example grade 40 steel rebar has a minimum absolute strength of 40 ksi. Rebar is generally fabricated in grades of 40, 60 and 75.

Expertise in structural engineering or structural CAD drafting is not enough for rebar detailing due to the involvement of various rebar sizes, grades and specifications. It requires a perfect blend of thorough knowledge and experience in preparing detailed drawings as per industry standards.

Vacations Packages

Tags: American, discusses, Grades, highlights, International, McDowell, NAIAS, Understanding
January 10th, 2012  |  Posted in Steel Cutting Tools  |  Comments Off