It contains the saddle, compound slide, and apron. They usually perform the same function in all these machines. clutch) in machines. Your email address will not be published. LADLE Receptacle used for transporting molten metal. Pipe thread is used on piping and tubing. Built-Up Edge (Nicknamed BUE) is a wear mechanism caused by the welding of chips to the insert body. Receive engineering articles to your inbox montly. These elements consist of three basic types: While generally not considered to be a machine element, the shape, texture and color of covers are an important part of a machine that provide a styling and operational interface between the mechanical components of a machine and its users. Others come in shapes that resemble a shaft (worm gear) or a rod (rack and pinion). LOOSE PULLEY A pulley which turns freely on a shaft so that a belt can be shifted from the driving pulley to the loose pulley in order to stop a machine driven by an overhead belt drive. S - Superalloys PARALLEL JAW VICE Type of vice in which the gripping faces between the sliding and fixed jaws are always parallel, irrespective of the gap between them. In this post, we shall learn about machine elements and their types. Machine element or hardware refers to an elementary component of a machine. Aluminum is a popular engineering material due to its low density (2.5 times lower than steel) and high(), A common format to describe the Application Range of a given Grade. Examples of such parts are the turbine in a jet engine, blades in a fan, pistons, crankshaft, etc. computer data inventions ANVIL Heavy block on which to hammer and shape metals. TAPER TURNING ATTACHMENT Device fitted to a lathe, to cause movement of cutting tool at an angle to the axis of the lathe so as to produce the required taper on the workpiece. PIPE THREAD A 60 thread form having flattened crests and roots which are cut on a taper having 3/4 inch taper per foot. For instance, a motor can heat up considerably during operation. U-BOLT An externally threaded fastener bent in the shape of the letter U and with both ends threaded. DEAD CENTER The center fitted to the tailstock of a lathe and so named because it does not rotate. In some cases, they may be solely responsible for the transfer of torque between the two elements.
field its LEAD SCREW Master screw used for cutting a screw thread in a lathe. HEAD STOCK An assembly containing the headstock spindle and the mechanism for driving it which is fastened permanently to the left end of the lathe bed.
HALF NUT A mechanism attached to the apron of a lathe and operated by a lever. In machine design, keys are small mechanical components that connect shafts to rotating elements. It comes in various sizes and shapes such as rectangle, square, parallel sunk, woodruff, gib-head and feather. Carbon is a chemical element designated by the symbol C; moreover, carbon is a critical factor in several machining topics. SET SCREW Usually a hardened steel screw having either no head or a square head and with various designs of points or ends to lock or tighten adjustable machine parts in position on a shaft. DEMAGNETIZER Device for removing permanent magnetism from steel tools and parts. TAPER PINS Steel pins used for locating and holding machine parts in position on a shaft. Change gears on a lathe make it possible to cut threads of different pitches and obtain different feeds per revolution. The compound slide or rest used on an engine lathe is an example. H - Hardened Steel. IDLER GEARS A gear or gears placed between driver and driven gears when the distance between the driver and driven gears would require too exceptionally large gears. When the clutch is closed, the quill and shaft revolve together. Only the shaft passes through the bulkhead from the engine room to the pump room. The die head consists of a cylindrical body with a shank to enable it to be clamped in the turret. TUMBLER GEARS Two gears acting as idler gears between the spindle gear and the fixed stud gear on a lathe gear train. INDEX PLATE A thin circular plate having various circles of holes.
Parts such as fasteners (screws, nuts and bolts, rivets, etc. Learning about machine elements is the first step in creating efficient machines that solve pressing problems. Common values for machined materials range from 100 HB for very soft materials up to 650 HB for heat-treated steels. GOGGLES These are worn when tool grinding, to protect the eyes from the flying particles of grit. KEYS Metal pieces of various designs which fit into a slot in a shaft and project above the shaft to fit into a mating slot in the center hole of a gear or pulley to provide a positive drive between the shaft and the gear or pulley. SQUARE THREAD A form of screw thread in which the cross-section of the thread forms a square, making the width of the thread equal to the width of the space between the threads. Alloying element is a chemical element added to the primary substance of the material (in most cases ferrous) to tweak and enhance mechanical, metallurgical, and physical properties to suit different engineering needs. PILOT A guide at the end of a counter-bore which fits freely into the drilled hole to hold and align the body of the counter-bore while cutting takes place. THUMB SCREW A type of screw having a winged or knurled head for turning by hand when a quick and light clamping effect is desired. INDEPENDENT CHUCK A three jaw chuck, in which each of, the jaws may be moved independently of the other two. They also absorb shocks and vibration, increasing the service life of the machines in the process. programmable logic applications monitoring serial port Home Mechanical Engineering MACHINE COMPONENTS Terms and Definitions Mechanical Engineering MACHINE COMPONENTS Terms and Definitions | Terminology | Meanings. In mechanical engineering applications, different types of fasteners are used to hold together two or more machinery components. Chromium added to carbon steel in percentages greater than 11% creates Stainless Steel. FOUR JAW CHUCK A chuck that provides a more powerful grip on the work by means of four jaws which may be adjusted independently, so that irregular shapes may be gripped, and the fact that the jaws can be reversed enables the work to be gripped inside as well as from the outside. Required fields are marked *. NUT BOX MECHANISM In a lathe it is used to engage and disengage the lead screw for thread cutting. 
In machining, the approach (or entry) angle is when the cutting edge is engaged with the material in the feed's direction. QUICK RETURN MECHANISM A mechanism on various machine tools to give a table, ram or other movable part a rapid movement during the return or non-cutting stroke. NUT A metal fastener of square, hexagon or other shape having an internal thread which screws onto a bolt, stud, or arbor. Bearings find use in a range of different motions, such as linear (conveyors), rotational (crankshafts), hinge (doors, windows) and spherical (ball and socket joint). Elementary components used in the structure, controls, or mechanisms of a machine, https://en.wikipedia.org/w/index.php?title=Machine_element&oldid=1085745547, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 2 May 2022, at 06:17. PIN VICE Small vice with self centering jaws useful for gripping small rods, wires, drills and files. Due to such a function, keys must endure high compressive and shearing stresses. COMPOUND SLIDE A principal part of a lathe, frequently called a COMPOUND REST, consisting of an upper and lower part dovetailed together. A vertical attachment makes it possible to do vertical milling on a horizontal machine. The entire assembly rotates at the same speed. The screw body is slightly longer than the thickness of the piece pivoted on the screw so as to allow the piece to move freely when the screw is set up tightly against the bottom of the shoulder. 
Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced . [2] Most are standardized to common sizes, but customs are also common for specialized applications.[3]. SWIVEL SLIDE Device to enable the toolpost slide of a lathe to be set at an angle for taper turning or cutting V threads. 
EXPANDING MANDREL It is used to hold work on an internal diameter. TOOL HEAD The part of machine tool that carries the cutting tool and is adjustable for moving and setting the cutting tool into the workpiece being machined. This reduction in Chip Load is called Chip Thinning. The effects described below are valid for both milling and turning. In machine design, it is important to be as specific as possible about the design or selection of fasteners in applications. the test is done with a 10 mm steel ball pressed with 3000 Kgf (6,614 Lbf). The complete assembly is known as a keyed joint. Both general and special purpose machine elements are elementary mechanical components that function together to make a machine work. RACK A straight metal strip having teeth that mesh with those of a gear to convert rotary motion into reciprocating motion or just the opposite. LATHE CENTERS Solid steel pieces which have a tapered shank and 60 pointed end. The primary purpose of bearings is to prevent direct metal-to-metal contact of the two parts and enable smooth relative motion between them. STEP BLOCK A block of steel or cast iron having a series of steps and used for supporting the ends of machine clamps when clamping work to the table. The abundance of available bearing designs enables designers to select the most suitable bearing for different applications, ensuring maximum reliability, efficiency, performance and durability. The feather is usually fastened to the sliding piece. SLIDE REST A tool holding slide used on machine tools. For example, hex bolts can be manufactured as per 18 different standards, the most popular being DIN 931 and DIN 933. FEATHER A sliding key sometimes called a spline, used to prevent a pulley, gear, or other part from turning on a shaft, but allows it to move lengthwise. ROLLER STEADY Type of steady fitted with roller points to support long or slender work in a lathe. Due to the high nickel content, It has excellent corrosion resistance. TURRET Rotatable device for holding several cutting tools set in position to operate in turn. TAILSTOCK The principal part of the engine lathe, used for supporting one end of a workpiece by means of a center point held in the spindle. APRON The function of a lathe apron is to carry the mechanism for sliding and surfacing motions and screw cutting. Some examples of fasteners are screws, nuts/bolts, split pins, rivets and circlips. SLIDING TABLE (compound) Device to enable holes to be drilled or bored very accurately with respect to each other. FIXTURE Device by which a component to be machined is correctly located and held during a machining operation. HAND VICE Small vice used for holding light articles such as pins, screws etc., especially during heat treatment. These machine elements work in unison to run the car as intended by the machine design. SPRING COLLETS A type of draw in collet made of hardened steel and having three slots or saw cuts which permit the collet to be closed tightly against a tapered sleeve by the draw bar. words brody michael elegant towards books beauty SCREW JACK Device used for lifting a heavy load by means of a screw. The teeth on two gears mesh with each other and transfer power from the driving shaft to the driven shaft. Such a coupling is known as Overload Safety Mechanical Coupling and is normally used for the protection of motors and drive systems in power transmissions. WAYS The flat or V shaped bearing surfaces on machine tools over which other movable parts slide. CENTRE SQUARE Device to enable the rapid location of the centre of the flat end of a cylindrical workpiece. Sometimes called a center rest or STEADY. CHUCK Appliance for gripping tools, such as drills, or for holding work in a lathe. One end is tapered outside to fit the drilling machine spindle hole while the opposite end has a larger taper hole to receive the cutting tool shank. PULLEY A wheel having a plain or V groove rim over which a belt runs for the transmission of power from one shaft to another. A clapper block is hinged into the clapper box to permit the cutting tool to swing upward on the return stroke.
In milling, the depth of cut is two-dimensional. The carriage carries the cutting tool and moves along the ways of the lathe. STEPPED CONE PULLEY A cone pulley having several diameters or steps for obtaining different speeds on machine tools. Some of these mechanical parts are elementary mechanical elements, whereas some others are in an assembly with other parts and perform a specific function in the car. RIGHT HAND THREAD A screw thread which advances into the mating part when turned clockwise or to the right. In most of these standards, they are available in sizes from M3 to M48. CLAMP Device for holding work during marking out, measuring, machining, fitting or grinding. At this percentage and greater (When combined with Nickel), the corrosion resistance of steel vastly increases, and oxidation of the iron is prevented.
The five main types of keys are round, saddle, spline, sunk and tangent. It(). The Axial depth of cut (AP or ADOC), is the depth of material that the tool removes in its axis direction when it moves perpendicular to it. CARRIER Tool for driving work which is held between centers, as in a lathe. Where simplicity of chucking is the first consideration, magnetic chucks are used. Machine elements are basic mechanical parts and features used as the building blocks of most machines.
The lever consists of a rigid arm or bar pivoted or bearing on a point called the fulcrum and has a weight arm and a power arm. LATHE CARRIER It is clamped on a bar and engaged with a projecting dog on the catch plate fitted to the lathe head stock. REVOLVING LATHE CENTRE It is fitted in the tailstock instead of the fixed type of loose head centre, in some cases, so that the high speeds of work revolutions become possible. It is usually defined as steel made of Iron (Fe) with small Carbon (C) addition but without any other alloying elements. DIE SCREW Tool used when threading cylindrical pieces beyond the capacity of a die plate. The helix may be single or multiple. BELT SHIFTER A flat hardwood strip of suitable length having shifter fingers attached at one end and used to shift a belt from one pulley to another or to replace a belt which has run off a pulley on an overhead drive shaft. All of the simple machines may be described as machine elements, and many machine elements incorporate concepts of one or more simple machines. OVERARMS Adjustable supports for the end of a milling cutter arbor farthest from a milling machine spindle. Most gears are cylindrical in shape with teeth along the circumference. WOODRUFF KEY A flat semicircular piece of metal used as a key in a special circular key seat slot cut in a shaft to drive a gear, pulley or other part.
One end is screwed into a machine or workpiece after which a second part is placed over the stud and held in place by a nut. One of the most common units used for listing the hardness of steel materials. A set of three or more index plates may be furnished for an index head. These elements are the basic building blocks in many types of machines. CATCH PLATE Plate screwed to the nose of the lathe spindle for the purpose of driving work held between centers, through the medium of a carrier or driving dog. HOLDING BLOCK Fixture designed to hold small or thin gauge parts which cannot readily be held in a vice. MAGNETIC CHUCK Magnetic device for holding work during machining and grinding. These are mechanical elements that find specific use in machine design. The lower part or base is graduated in degrees and can be swivelled to any angle for turning short tapers and angles. Carbon steel is the most simple and cheapest form of steel. For each type of engine, the size of every component is redesigned. The capability to work efficiently in any orientation means they also come in a variety of shapes. BOX ANGLE PLATE An angle plate made of cast iron, usually with slots cast in it and accurately machined on the outside. INTERMEDIATE GEAR An idler or loose gear on a stud for transmitting power between a driver and a driven gear. On milling machines they are used to obtain different leads when milling spirals and helices. TWO JAW CHUCK Chuck furnished with two jaws, diametrically opposite. Also called CIRCULAR MILLING ATTACHMENT. The bottom of the keyway where the key rests in the shaft is known as the keyseat. VICE A mechanical device of many designs and sizes in which work-pieces are clamped for hand and machine operations.