3D printing is any of various processes in which material is joined or solidified under computer control to create a three-dimensional object, with material being added together (such as liquid molecules or powder grains being fused together), typically layer by layer. In the '90s, 3D printing techniques were considered suitable only to the production of functional or aesthetical prototypes and, back then, a more comprehensive term for 3D printing was rapid prototyping. Today, the precision, repeatability and material range have increased to the point that 3D printing is considered as an industrial production technology, with the name of additive manufacturing. 3D printed objects can have a very complex shape or geometry and are always produced starting from a digital 3D model or a CAD file. +
3D printing filament is the thermoplastic feedstock for fused deposition modeling 3D printers. There are many types of filament available with different properties, requiring different temperatures to print. Filament is available in two standard diameters; 1.75 and 2.85 mm/3 mm. +
Un jeu d'enfant, à condition d'avoir le matériel, la méthode et un minimum de muscles. Voiture grise pneu L'idéal est de ne jamais avoir à le faire, mais force est de constater qu'il est utile de savoir changer une roue. Imaginez qu'une crevaison arrive lors de votre examen de permis de conduire ! +
Un jeu d'enfant, à condition d'avoir le matériel, la méthode et un minimum de muscles. Voiture grise pneu L'idéal est de ne jamais avoir à le faire, mais force est de constater qu'il est utile de savoir changer une roue. Imaginez qu'une crevaison arrive lors de votre examen de permis de conduire ! +
A tire (American English) or tyre (British English; see spelling differences) is a ring-shaped component that surrounds a wheel's rim to transfer a vehicle's load from the axle through the wheel to the ground and to provide traction on the surface traveled over. Most tires, such as those for automobiles and bicycles, are pneumatically inflated structures, which also provide a flexible cushion that absorbs shock as the tire rolls over rough features on the surface. Tires provide a footprint that is designed to match the weight of the vehicle with the bearing strength of the surface that it rolls over by providing a bearing pressure that will not deform the surface excessively. +
En mécanique, une cassette de pignons est un ensemble de pignons situé sur la roue arrière d'un vélo1. Ce dispositif couplé au dérailleur permet de changer le rapport de transmission ou développement. +
A chainsaw is a portable, mechanical saw which cuts with a set of teeth attached to a rotating chain that runs along a guide bar. It is used in activities such as tree felling, limbing, bucking, pruning, cutting firebreaks in wildland fire suppression and harvesting of firewood. +
Un jeu d'enfant, à condition d'avoir le matériel, la méthode et un minimum de muscles. Voiture grise pneu L'idéal est de ne jamais avoir à le faire, mais force est de constater qu'il est utile de savoir changer une roue. Imaginez qu'une crevaison arrive lors de votre examen de permis de conduire ! +
Un jeu d'enfant, à condition d'avoir le matériel, la méthode et un minimum de muscles. Voiture grise pneu L'idéal est de ne jamais avoir à le faire, mais force est de constater qu'il est utile de savoir changer une roue. Imaginez qu'une crevaison arrive lors de votre examen de permis de conduire ! +
Un jeu d'enfant, à condition d'avoir le matériel, la méthode et un minimum de muscles. Voiture grise pneu L'idéal est de ne jamais avoir à le faire, mais force est de constater qu'il est utile de savoir changer une roue. Imaginez qu'une crevaison arrive lors de votre examen de permis de conduire ! +
La clé à molette est un outil inventé en 1888 par le suédois Johan Petter Johansson, dont l'ouverture est adaptable à la tête de la vis ou de l'écrou. Elle comporte une mâchoire mobile commandée par une vis sans fin portant la molette de réglage de l'ouverture. Elle est pourvue parfois d'une graduation millimétrique. +
La protection de votre vie privée est importante. Dans ce tutoriel, vous apprendrez comment effacer le cache, les cookies et l'historique de votre iPhone en quelques étapes. +
Le fouet à chaîne sert à démonter des cassettes montées sur corps de roue libre intégré au moyeu. Il permet aussi de démonter les couronnes des roues libres de type plus ancien. +
The fusion splicer is a tool which delivers fast and reliable fibre splicing under even harsh environmental conditions. It combines portability and ease of use in a ruggedized body. +
Isopropyl alcohol is a colorless, flammable chemical compound with a strong odor. It dissolves a wide range of non-polar compounds. Thus, it is used widely as a solvent and as a cleaning fluid, especially for dissolving oils. +
A centrifuge is a piece of equipment that puts an object in rotation around a fixed axis (spins it in a circle), applying a force perpendicular to the axis of spin (outward) that can be very strong. The centrifuge works using the sedimentation principle, where the centrifugal acceleration causes denser substances and particles to move outward in the radial direction. At the same time, objects that are less dense are displaced and move to the center. In a laboratory centrifuge that uses sample tubes, the radial acceleration causes denser particles to settle to the bottom of the tube, while low-density substances rise to the top. +
Laser cutting is a technology that uses a laser to cut materials, and is typically used for industrial manufacturing applications, but is also starting to be used by schools, small businesses, and hobbyists. Laser cutting works by directing the output of a high-power laser most commonly through optics. The laser optics and CNC (computer numerical control) are used to direct the material or the laser beam generated. A typical commercial laser for cutting materials involved a motion control system to follow a CNC or G-code of the pattern to be cut onto the material. The focused laser beam is directed at the material, which then either melts, burns, vaporizes away, or is blown away by a jet of gas,[1] leaving an edge with a high-quality surface finish. Industrial laser cutters are used to cut flat-sheet material as well as structural and piping materials. +
A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power.[1] The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed. Jacks are usually rated for a maximum lifting capacity (for example, 1.5 tons or 3 tons). Industrial jacks can be rated for many tons of load. +
The photometer is an instrument that measures the strength of electromagnetic radiation in the range from ultraviolet to infrared and including the visible spectrum. +
La pince multiprise ou pince multiple, également appelée pince becro, est un outil à main. C'est une pince qui permet de saisir ou de maintenir des objets de tailles différentes. Elle est munie d'une articulation réglable qui permet d'agrandir l'écartement des mâchoires. +
Une pince à dénuder est un outil qui permet de dénuder des fils électriques. Les branches de la pince sont isolées et elle possède deux parties tranchantes de forme triangulaires opposées. +
A punching machine is a machine tool for punching and embossing flat sheet-materials to produce form-features needed as mechanical element and/or to extend static stability of a sheet section. +
Home sewing machines are designed for one person to sew individual items while using a single stitch type. In a modern sewing machine the fabric easily glides in and out of the machine without the inconvenience of needles and thimbles and other such tools used in hand sewing, automating the process of stitching and saving time. +
A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top and closed at the bottom. +
Un tournevis est un outil de poing utilisé entre autres pour l'insertion et le retrait des vis dans les matériaux. Le tournevis motorisé s'appelle une visseuse, celle-ci est le plus souvent « sans fil ». +
La vis cruciforme, vis étoile ou vis Phillips est un type de vis de fixation (en fait d'empreinte de tête de vis), largement utilisé dans l'assemblage de pièces. Son empreinte se reconnaît par sa forme de croix (comme un +). +
This optical pencil allows to send a light signal in any type of fibre in order to look for breaks and crushing by light leakage through the sheath or to locate defective welds in connection drawers. +
A washing machine (laundry machine, clothes washer, or washer) is a device used to wash laundry. The term is mostly applied to machines that use water as opposed to dry cleaning (which uses alternative cleaning fluids, and is performed by specialist businesses) or ultrasonic cleaners. The user adds laundry detergent which is sold in liquid or powder form to the wash water. +