A Chuck is a specialised type of clamp used to hold rotating tools or materials. A clamp is a device to hold or secure an object, to prevent it from moving. ...

Collet

A collet is a sleeve with a (normally) cylindrical inside and a conical outside. The collet has kerf cuts along its length to allow it to expand and contract. A threaded section at the rear of the collet is used to pull it into a matching conical socket. As the collet is pulled into the socket, the collet will contract - gripping the contents of the inner cylinder. Collets are most commonly found on milling machines, lathes, wood routers, and precision grinders. There are many different systems, common examples being the ER and R8 systems. Collets can also be obtained to fit Morse or Brown and Sharpe taper sockets. A collet is a holding device that forms a collar around the object to be held and exerts a strong clamping force on the object when it is tightened. ... A right circular cylinder In mathematics, a cylinder is a quadric, i. ... In common usage and elementary geometry, a cone (Greek: κώνος) is a solid object obtained by rotating a right triangle around one of its two short sides, the cones axis. ... Kerf is the name given to the cut that a saw makes. ... Screw thread, used to convert torque into the linear force in the flood gate. ... Cutters for a milling machine. ... Conventional metalworking lathe See also: Lathe (tool) A metal lathe is a rigid machine tool designed to remove material from a workpiece, through the action of a cutting tool. ... A D-handle fixed-base router A router is a woodworking tool used to rout out (hollow out) an area in the face of a piece of wood. ... Rotating abrasive wheel on a bench grinder. ... In the design of machine tools there is a need for users to be able to quickly and easily install or remove particular cutting bits or other accessories from the powered rotating spindle of the machine tool. ...

Typically collets offer far higher levels of precision and accuracy than self-centering chucks, and have a far shorter setting up time than independent-jaw chucks. The penalty is that most collets can only accommodate a single size of workpiece. An exception are ER collets which typically have a working range of 1 mm (about 0.04 inches).

Collets usually are made to hold cylindrical work, but are available to hold square, hexagonal or octagonal workpieces.

Drill

Keyless and keyed drill chucks

A drill chuck is a specialised three-jaw chuck used to hold drill bits or related tools. Download high resolution version (1701x1182, 273 KB) Wikipedia does not have an article with this exact name. ... Download high resolution version (1701x1182, 273 KB) Wikipedia does not have an article with this exact name. ... Drill bits are cutting tools used to create cylindrical holes. ...

The image at right shows an assembled keyless chuck at the top. The tightening action of this chuck style is performed by twisting the body using firm hand pressure only.

The lower images show the traditional keyed style of drill chuck with its key. The arbor is shown separately to the right. These chucks require a key to provide the necessary torque to tighten and loosen the jaws. The rotary action of the key turns the outer body which acts on an internal screw; this in turn moves the threaded jaws in or out along a tapered surface. The taper allows the jaws to encompass various sizes of drill shanks. The end view shows the three small jaws that slide within the body. In physics, torque can be thought of informally as rotational force. The SI units for Torque are newton meters although centinewton meters (cN·m), foot-pounds force (ft·lbf), inch pounds (lbf·in) and inch ounces (ozf·in) are also frequently used expressions of torque. ...

Some high precision chucks use ball thrust bearings to reduce friction in the closing mechanism and maximizing drilling torque. These chucks are sometimes referred to as "super chucks".

Special Direct System (SDS)

Developed by Bosch in 1975 for hammer drills, the SDS uses a cylindrical shank on the tool, with indents to be held by the chuck. A tool is inserted into the chuck by pressing in, and is locked in place until a separate lock release is used – no tightening required. The rotary force is supplied through wedges that fit into two or three open grooves. The hammer action actually moves the bit up and down within the chuck since the bit is free to move a short distance. Two sprung balls fit into closed grooves, allowing movement whilst retaining the bit. SDS relies on a tool having the same shank diameter as the chuck - there are three standard sizes: The Robert Bosch GmbH is a German company which was started in 1886 by Robert Bosch. ... The rotary hammer drill (also known as roto hammer drill or masonry drill) is an electric drill type dedicated to drilling holes in masonry. ...

• SDS-Plus – a 10 mm shank with two open grooves held by the driving wedges and two closed grooves held by locking balls. This is the most common size and takes a hammer up to 4 kg. The wedges grip an area of 75 mm² and the shank is inserted 40 mm into the chuck.^[1]
• SDS-top a 14 mm shank similar to SDS-plus, designed for hammers from 2 to 5 kg. The grip area is increased to 212 mm² and the shank is inserted 70 mm. This size is not common.^[2]
• SDS-max – an 18 mm shank with three open grooves and locking segments rather than balls. It is designed for hammers over 5 kg. The wedges grip an area of 389 mm² and the shank is inserted 90 mm.^[3]

Many SDS drills have a "rotation off" setting, which allows the drill to be used for chiselling. The name SDS comes from the German "Steck – Dreh – Sitz" (Insert – Twist – Stay). German-speaking countries may use "Spannen durch System" (Clamping System), though Bosch uses "Special Direct System" for international purposes.^[4]

Three-jaw

A three-jaw chuck is a rotating clamp which uses three interconnected dogs or 'jaws' to hold on a tool or work piece. Three-jaw chucks are usually self-centering and are best suited to grip circular cross sections, though independent versions can be obtained. Image File history File links Download high resolution version (1653x1242, 285 KB) Summary Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Chuck (engineering) User:Graibeard/gallery ...

The image shows a three-jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws which moves the three jaws in unison, to tighten or release the workpiece.

The Griptru™ style of self-centering chuck from Pratt Burnerd Intl., Ltd. has further adjustment screws which can be used to further improve the accuracy of the chuck at any chosen diameter of workpiece.

Three-jaw chucks can be found on lathes and indexing heads. Indexing head and tailstock set up on a milling machines table An indexing head is a specialized tool that allows a work piece to be rotated to any angle angle or circular division. ...

Four-jaw

A four-jaw chuck is similar to a three-jaw chuck, but with four jaws, each of which can be moved independently. This makes them ideal for gripping non-circular cross sections, but difficult to centre precisely. Four-jaw chucks are almost never used for tool holding. Four-jaw chucks can be found on lathes and indexing heads. Image File history File links Download high resolution version (1536x1449, 365 KB) Summary Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Chuck (engineering) User:Graibeard/gallery ...

The image shows a four-jaw chuck with the jaws independently set. The key is used to adjust each jaw separately.

Multi jaw

For special purposes, and also the holding of fragile materials, chucks are available with six or eight jaws. These are invariably of the self-centering design, and are built to very high standards of accuracy.

Self-centering four jaw

A four jaw chuck with a mechanism for centering the work piece. Sometimes used to refer to chucks where the jaws are moved in interconnected pairs.

Magnetic

Used only for holding ferro-metallic work pieces, a magnetic chuck consists of an accurately centred permanent magnet face. Electro Magnets or permanent magnets are brought into contact with fixed ferrous plates, or 'pole pieces', contained within a housing. These pole pieces are usuall flush with the housing surface. The part or 'work piece' to be held forms the closing of the magnetic loop or path, onto those fixed plates, providing a secure anchor for the work piece Iron filings in a magnetic field generated by a bar magnet A magnet is an object that has a magnetic field. ...

See also

• Faceplate and driver

Notes and references

1. ^ SDS-plus tool insertion system. Encyclopedia of technical terms (A-Z). Retrieved on 2006-04-12.
2. ^ SDS-top. Encyclopedia of technical terms (A-Z). Retrieved on 2006-04-12.
3. ^ SDS-max. Encyclopedia of technical terms (A-Z). Retrieved on 2006-04-12.
4. ^ SDS. Lexikon der Elektrowerkzeuge. Retrieved on 2006-04-12. (German language)

2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... April 12 is the 102nd day of the year in the Gregorian calendar (103rd in leap years). ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... April 12 is the 102nd day of the year in the Gregorian calendar (103rd in leap years). ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... April 12 is the 102nd day of the year in the Gregorian calendar (103rd in leap years). ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... April 12 is the 102nd day of the year in the Gregorian calendar (103rd in leap years). ...

Metalworking:
Machine tooling: Image File history File links Blacksmith-hammer-anvil-50x50. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ...	Angle plate | Chuck | Collet | Fixture | Indexing head | Lathe center | Machine taper | Magnetic base | Mandrel | Rotary table | Wiggler Adjustable angle plate Fixed angle plate An angle plate is a work holding device used as a fixture in metalworking. ... A collet is a holding device that forms a collar around the object to be held and exerts a strong clamping force on the object when it is tightened. ... Indexing head and tailstock set up on a milling machines table An indexing head is a specialized tool that allows a work piece to be rotated to any angle angle or circular division. ... A lathe center (or center) is a tool that has been ground to an included angle of 60 ° and is used to accurately position a workpiece about its axis. ... In the design of machine tools there is a need for users to be able to quickly and easily install or remove particular cutting bits or other accessories from the powered rotating spindle of the machine tool. ... Magnetic base as used in the engineering metaltrades. ... Mandrel (pronounced mandrul, and also transliterated as manderil) is a term that can refer to: an object used to shape machined work; a tool component that grips or clamps materials to be machined; or a tool component that can be used to grip other moving tool components. ... 10 inch, manual rotary table A rotary table is a precision work positioning device used in metalworking. ... Wiggler Set of wigglers A wiggler, center finder or sticky pin refers to a tool used in the rotating spindle of a machine such as mill or drill. ...
Metalworking topics:   Casting | CNC | Cutting tools | Drilling and threading | Fabrication | Finishing | Grinding | Jewellery | Lathe (tool) | Machining | Machine tooling | Measuring | Metalworking | Hand tools | Metallurgy | Milling | Occupations | Press tools | Smithing | Terminology | Welding One half of a bronze mold for casting a socketed spear head dated to the period 1400-1000 BC. This article is about the manufacturing process; for other uses, see Casting (disambiguation). ... A CNC Turning Center The abbreviation CNC stands for Computer Numerical Control, and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program written in a notation conforming to the EIA-274-D... a Cutting Tool, in the context of Metalworking is any tool that is used to remove metal from the workpiece by means of shear deformation. ... Drilling is the process of using a drill bit in a drill to produce holes. ... A typical steel fabrication shop Fabrication is an industrial term generally applied to the building of metal machines and structures. ... Metalworking finishing is the activity of making things out of metal in a skillful manner. ... Rotating abrasive wheel on a bench grinder. ... Jewellery (Jewelry in American English) is literally any piece of fine material used to adorn one’s self. ... Conventional metalworking lathe In woodturning, metalworking, metal spinning, and glassworking, a lathe is a machine tool which spins a block of material so that when abrasive, cutting, or deformation tools are applied to the block, it can be shaped to produce an object which has rotational symmetry about an axis... A lathe is a common tool used in machining. ... A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by the selective removal of metal. ... The examples and perspective in this article or section may not represent a worldwide view. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ... Metalworking hand tools are hand tools that are used in the metalworking field. ... Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. ... Cutters for a milling machine. ... It has been suggested that this article or section be merged with Smith (metalwork). ... Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... A smith or metalsmith is a person involved in the shaping of metal objects. ... This article needs to be wikified. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...