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  Dalibor Pejicic uploaded a new part Idea No000092 @ PARTcloud.net

  

  Idea No000092

  • 34 minutes ago
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  Rosie Roza created a new knowledge: Turbojet (en)

  Turbojet (en)

  The turbojet is an airbreathing jet engine, typically used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet, a compressor, a combustion chamber, and a turbine (that drives the compressor). The compressed...  moreThe turbojet is an airbreathing jet engine, typically used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet, a compressor, a combustion chamber, and a turbine (that drives the compressor). The compressed air from the compressor is heated by the fuel in the combustion chamber and then allowed to expand through the turbine. The turbine exhaust is then expanded in the propelling nozzle where it is accelerated to high speed to provide thrust. Two engineers, Frank Whittle in the United Kingdom and Hans von Ohain in Germany, developed the concept independently into practical engines during the late 1930s.
  Turbojets have been replaced in slower aircraft by turboprops because they have better range-specific fuel consumption. At medium speeds, where the propeller is no longer efficient, turboprops have been replaced by turbofans. The turbofan is quieter and has better range-specific fuel consumption than the turbojet. Turbojets are still common in medium range cruise missiles, due to their high exhaust speed, small frontal area, and relative simplicity.
  Turbojets have poor efficiency at low vehicle speeds, which limits their usefulness in vehicles other than aircraft. Turbojet engines have been used in isolated cases to power vehicles other than aircraft, typically for attempts on land speed records. Where vehicles are 'turbine powered' this is more commonly by use of a turboshaft engine, a development of the gas turbine engine where an additional turbine is used to drive a rotating output shaft. These are common in helicopters and hovercraft....    less

  • 35 minutes ago

  • Mirta Dautovic likes this.
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  Drazen Vorih uploaded a new part Playground @ PARTcloud.net

  

  Playground

  • 36 minutes ago
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  Rosie Roza created a new knowledge: Leviton (en)

  Leviton (en)

  Leviton Manufacturing Company, Inc., is the largest privately held manufacturer of electrical wiring equipment in North America. It produces electrical light sockets, receptacles and outlets, switches, dimmers and other lighting control systems, wire, pow...  moreLeviton Manufacturing Company, Inc., is the largest privately held manufacturer of electrical wiring equipment in North America. It produces electrical light sockets, receptacles and outlets, switches, dimmers and other lighting control systems, wire, power cables, power cords, wall and ceiling occupancy sensors, wall plates, datacom, and other electrical products. Leviton is most famous for its Decora wall switch, the flat low profile form factor which replaced the standard toggle switch in many homes and offices....    less

  • 40 minutes ago

  • Mirta Dautovic likes this.
• 
  Rosie Roza created a new knowledge: Grinding (abrasive cutting) (en)

  Grinding (abrasive cutting) (en)

  Grinding is an abrasive machining process that uses a grinding wheel as the cutting tool.
  A wide variety of machines are used for grinding:
  
  Hand-cranked knife-sharpening stones (grindstones)...  moreGrinding is an abrasive machining process that uses a grinding wheel as the cutting tool.
  A wide variety of machines are used for grinding:
  
  Hand-cranked knife-sharpening stones (grindstones)
  Handheld power tools such as angle grinders and die grinders
  Various kinds of expensive industrial machine tools called grinding machines
  Bench grindersGrinding practice is a large and diverse area of manufacturing and toolmaking. It can produce very fine finishes and very accurate dimensions; yet in mass production contexts it can also rough out large volumes of metal quite rapidly. It is usually better suited to the machining of very hard materials than is "regular" machining (that is, cutting larger chips with cutting tools such as tool bits or milling cutters), and until recent decades it was the only practical way to machine such materials as hardened steels. Compared to "regular" machining, it is usually better suited to taking very shallow cuts, such as reducing a shaft’s diameter by half a thousandth of an inch or 12.7 μm.
  Grinding is a subset of cutting, as grinding is a true metal-cutting process. Each grain of abrasive functions as a microscopic single-point cutting edge (although of high negative rake angle), and shears a tiny chip that is analogous to what would conventionally be called a "cut" chip (turning, milling, drilling, tapping, etc.). However, among people who work in the machining fields, the term cutting is often understood to refer to the macroscopic cutting operations, and grinding is often mentally categorized as a "separate" process. This is why the terms are usually used separately in shop-floor practice.
  Lapping and sanding are subsets of grinding.  less

  • 57 minutes ago

  • Mirta Dautovic likes this.
• 
  Dalibor Pejicic uploaded a new part Idea No000084 @ PARTcloud.net

  

  Idea No000084

  • 1 hour ago
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  Rosie Roza created a new knowledge: Wrecking ball (en)

  Wrecking ball (en)

  A wrecking ball is a heavy steel ball, usually hung from a crane, that is used for demolishing large buildings. It was most commonly in use during the 1950s and 1960s. Several wrecking companies claim to have invented the wrecking ball. An early document...  moreA wrecking ball is a heavy steel ball, usually hung from a crane, that is used for demolishing large buildings. It was most commonly in use during the 1950s and 1960s. Several wrecking companies claim to have invented the wrecking ball. An early documented use was in the breaking up of the SS Great Eastern in 1888–1889, by Henry Bath and Co, at Rock Ferry on the River Mersey.
  In 1999, the wrecking ball was described as "one of the most common forms of large-scale coarse demolition." Although the wrecking ball is still the most efficient way to raze a concrete frame structure, its use is decreasing. With the invention of hydraulic excavators and other machinery, the wrecking ball has become less common at demolition sites as its working efficiency is less than that of high reach excavators.  less

  • 1 hour ago

  • Mirta Dautovic likes this.
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  Christian May pin onto 3D CAD MODELS @ Christian May:

  

  3D CAD MODELS- DIN 125 A (ISO 7089) - A2 - Washers, product grade A, up to hardness 250 HV, primarily for hexagon bolts and nuts, form A

  cs: DIN 125 A (ISO 7089) - A2 - Washers, product grade A, up to hardness 250 HV, primarily for hexagon bolts and nuts, form A
  de: DIN 125 A (ISO 7089) - A2 - Scheiben, Produktklasse A, bis Härte 250 HV, vorzugsweise für Sechskantschrauben und -mutter...  morecs: DIN 125 A (ISO 7089) - A2 - Washers, product grade A, up to hardness 250 HV, primarily for hexagon bolts and nuts, form A
  de: DIN 125 A (ISO 7089) - A2 - Scheiben, Produktklasse A, bis Härte 250 HV, vorzugsweise für Sechskantschrauben und -muttern, Form A
  en: DIN 125 A (ISO 7089) - A2 - Washers, product grade A, up to hardness 250 HV, primarily for hexagon bolts and nuts, form A
  it: DIN 125 A (ISO 7089) - A2 - Rondelle, classe di prodotto A, durezza fino a 250 HV, principalmente per viti testa esagonale e dadi esagonali, forma A
  fr: DIN 125 A (ISO 7089) - A2 - Rondelle,lasse A, dureté jusqu'à 250 HV, principalement pour vis et écrou hexagonal, Forme A
  es: DIN 125 A (ISO 7089) - A2 - Arandelas, categoría de productos A, hasta dureza 250 HV,con preferencia para tornillos y tuercas hexagonales, forma A  less

  • 1 hour ago
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  Christian May pin onto 3D CAD MODELS @ Christian May:

  

  3D CAD MODELS- Hexagon nut

  cs: Hexagon nut
  de: Sechskantmutter
  en: Hexagon nut
  it: Hexagon nut
  fr: Hexagon nut
  es: Hexagon nut

  • 1 hour ago
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  Rosie Roza created a new knowledge: Rocking chair (en)

  Rocking chair (en)

  A rocking chair or rocker is a type of chair with two curved bands (also known as rockers) attached to the bottom of the legs, connecting the legs on each side to each other. The rockers contact the floor at only two points, giving the occupant the abili...  moreA rocking chair or rocker is a type of chair with two curved bands (also known as rockers) attached to the bottom of the legs, connecting the legs on each side to each other. The rockers contact the floor at only two points, giving the occupant the ability to rock back and forth by shifting their weight or pushing lightly with their feet. Rocking chairs are most commonly made of wood. Some rocking chairs can fold....    

  • 1 hour ago

  • Mirta Dautovic likes this.
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  LiNa wrote a recent NEWS entry:

  

  (EN) 60 Years of CAD: These milestones shape the success story of Computer Aided Design since 1957

  Computer Aided Design over the course of time - Is your digital product catalog already fit for the CAD developments of the future?
  
  
  Over 60 years ago Dr. Patrick Hanratty, the “Father of CAD”, created the first numerical control system,...

  • #cadenas
  • #CAD
  • #eCATALOGsolutions
  • #Model
  • #Electronic Product Catalog
  • #3D

  • 2 hours ago

  • Dalibor Pejicic and Drazen Vorih like this.
• 
  LiNa wrote a recent NEWS entry:

  

  (DE) 60 Jahre CAD – Diese Meilensteine prägen die Erfolgsgeschichte des computergestützten Konstruierens seit 1957

  Computer Aided Design im Wandel der Zeit – Ist Ihr digitaler Produktkatalog bereits fit für die CAD Entwicklungen der Zukunft?
  
  
  Vor über 60 Jahren entwickelte Dr. Patrick Hanratty, der sogenannte “Vater des CAD”, das erst...

  • #cadenas
  • #CAD
  • #Modelle
  • #eCATALOGsolutions
  • #Elektronischer Produktkatalog
  • #3D

  • 2 hours ago

  • Drazen Vorih likes this.
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  xyz zyx uploaded a new part Roadster Wooden Toy @ PARTcloud.net

  

  Roadster Wooden Toy

  • 2 hours ago

  • Dalibor Pejicic, Drazen Vorih, and Rosie Roza like this.
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  xyz zyx uploaded a new part Wheel Loader @ PARTcloud.net

  

  Wheel Loader

  • 3 hours ago

  • Dalibor Pejicic, Drazen Vorih, and Rosie Roza like this.
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  Mr. David posted a new video:

  100 Kg/h Spray Dryer || Download free 3D models #100169

  Visit my Blog to download free 3D cad models + Blog: http://bit.ly/2Lj1kh5 Please Support me SUBSCRIBE: https://goo.gl/YR4pEu Follow me on: + Pinterest: http...

  • 4 hours ago

  • Drazen Vorih likes this.