Socket and spigot cotter joint and its design engineers. Ballandsocket joint definition is a joint in which a ball moves within a socket so as to allow rotary motion in every direction within certain limits. Spigot and socket joint, joints in water supply pipes. Diameter of spigotinside diameter of socket d diameter of spigot collar d 1 outer diameter of socket d 2 diameter of socket collar cthickness of socket collar t 1 thickness of spigot collar t thickness of cotter b mean width of cotter a distance of end of slot to the end of spigot p axial tensilecompressive force. Jul, 2017 chapter 7 cotter and knuckle joints machine design, mechanical engineering mechanical engineering notes edurev notes for mechanical engineering is made by best teachers who have written some of the best books of mechanical engineering.
Mar 01, 2016 video lecture on design procedure of cotter joint, socket and spigot joint from design of cotter joint, knuckle joint,levers and offset links chapter of design of machine for mechanical. The low chamfer angle of the wedge assures tightness of the joint and provides selfbraking, which prevents the wedge from falling out. A wide variety of spigot and socket joints options are available to you, there are 394 suppliers who sells spigot and socket joints on, mainly located in asia. Clearances between the cotter and slots in the rod end and socket allows the driven cotter to draw together the two parts of the joint until the socket end comes in contact with the cotter on the. The distal bone is capable of motion around an indefinite number of axis, which have one common center. Cotter jointsnut and bolts are more traditional and they give you more control on how tight or loose a joint is. This increases the bearing area and permits drilling while making the slots.
Sleeve cotter joint pdf the working of the cotter and sleeve and cotter and gib are shown below. A cotter joint is a simple and compact connection and is easily assembled and disassembled. We know that resisting tearing 4d2 tearing strength of rods4d2 t equating this to load p, we have p 4d2. Foot step bearing, socket and spigot joint, sleeve and cotter joint, knuckle joint, claw coupling, gib and cotter joint, bench vice, machine vice, pipe vice, drill jog, milling fixture, lathe toolpost, tool head of shaping machine, tailstock, stop valve, axle bearing. Mar 27, 2012 cotter and knuckle joints hareesha n g dept. Clearances between the cotter and slots in the rod end and socket allows the driven cotter to draw together the two parts of the joint until the socket end comes in. As seen in the assembly the knuckle joint has main four parts. Instructions the parts and assembly of the cotter joint is. A cotter is driven tightly through the slots in the rods which are kept slightly mis aligned. The heel is inserted into the groove for retaining the gasket, when the spigot enters the socket, the bulb gets compressed and does the sealing. Design a cotter joint subjected to a tensile load of 35 kn and a. Spigot is formed on one of the rods and socket is formed on the other. Shearing away of socket if dw examples are change gear boxed in automobile. Sleeve and cotter joint is a type of joint used to typically connect two similar coaxial cylindrical rods.
Spigot and socket joint definition and meaning collins. It contains a sleeve and two wedge shaped tapered cotters. P load on the joint or pull acting on rods, d diameter of the rod, d1 outer diameter of socket,d2 diameter of spigot or inside diameter of socket, d3 outside diameter of spigot collar,d4 diameter of socket collar, t1 thickness of spigot collar, a distance from the end of the slot to end of spigot, c. In a socket and spigot cotter joint, one end of the rods say a is provided with a socket type of end as shown in fig.
Someone please correct me if im wrong, ive never used a plastic safety joint. Cotter joint has mainly three components spigot, socket and cotter as shown in figure 9. Socket and spigot cotter joint sleeve and cotter joint gib and cotter joint applications. A cotter is a flat wedgeshaped piece of steel which is used to connect rigidly two rods which transmit motion in the axial direction tensile or compressive forces without rotation. This document is highly rated by mechanical engineering students and has been viewed 1586 times.
Ball and socket joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint. Design of socket and spigot cotter joint part number name of part 1 shaft or rod 2 socket 3 spigot 4 cotter 5 socket collar 6 spigot collar mr. Write design procedure for design of a socket and spigot joint, which may be subjected to an axial load. Autocad mechanical practice drawings pdf free download. Cotter joints are used to connect two rods, subjected to tensile or compressive forces along their. Video lecture on design procedure of cotter joint, socket and spigot joint from design of cotter joint, knuckle joint,levers and offset links chapter of design of machine for mechanical. Spigot fits inside the socket and the cotter is passed through. What are the applications of sleeve and cotter joint answers. Cotter joint article about cotter joint by the free dictionary. It is most highly developed in the large shoulder and hip joints of mammals, including humans. The end of the bar has a hole in it and it is called a lug. Shearing away of socket if dw cotter and unit 5 key, cotter and knuckle knuckle joints joints structure 5. A socket is formed by expanding the end of one rod in which the spigot end of the other rod is inserted. So you can deliberatley make a bear with loose joints, so the arms swing around, or you can joint tight.
Cotter joint these types of joints are used to connect the end of a rod or bar to a shaft. The ball and socket joint or spheroid joint is a type of synovial joint in which the ballshaped surface of one rounded bone fits into the cuplike depression of another bone. Spigot and socket joint pipes are joined and sealed using either a rolling rubber or a sliding rubber ring respectively. What are the practical application of cotter joint. Double shearing of cotter pin cotter joint modes of failure. Cotter joints, socket and spigot joint, sleeve and cotter joint gib and cotter joint, knuckle joint. A socket is formed by expanding the end of one rod in which the spigotend of the other rod is inserted. Design procedure the dimensions for a socket and spigot cotter joint may be obtained by considering the various modes of failure 1 failure of the rod in tension the rod may fail in tension due to the tensile load p.
Dec 21, 2017 design of socket and spigot cotter joint part number name of part 1 shaft or rod 2 socket 3 spigot 4 cotter 5 socket collar 6 spigot collar mr. Muttagi, slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Nov 07, 2009 design procedure for the spigot and cotter joint to understand the design steps let take a question and solve it step by step. Maharashtra state board of technical education autonomous. Machine drawing1 pages 101 150 text version fliphtml5. The end of the rod which goes into a socket is also called spigot. Cotter joint a detachable joint that is fastened or adjusted by a wedge. Sleeve cotter joint pdf the working of the cotterandsleeve and cotterand gib are shown below. The sliding rubber ring is installed using a soft soap lubricant. A metal is either hot or cold, is plastically deform into desire shape. The molten lead solidifies quickly and makes the joint water tight. Design and draw a neat sketch of spigot rod for the cotter joint using the following data.
P load on the joint or pull acting on rods, d diameter of the rod, d1 outer diameter of socket,d2 diameter of spigot or inside diameter of socket, d3 outside diameter of spigot collar,d4 diameter of socket collar, t1 thickness of spigot collar, a distance from the end of the slot to end of spigot, c thickness. Cotter joints may be used in areas subject to corrosion during operation, resulting in difficulty in turning rusty bolts and nuts of threaded connections. Design of socket and spigot cotter joint linkedin slideshare. Cotter joint article about cotter joint by the free. Exploded view of cotter joint mainly cotter joint is manufacture by using deformation process. Following are the three commonly used cotter joints to connect two rods by a cotter.
Chapter 7 cotter and knuckle joints machine design. Design procedure of cotter joint, socket and spigot joint. It enables the bone to move in many places nearly all directions. Spigot joint article about spigot joint by the free dictionary. The socket and the spigot are provided with a narrow rectangular slot. A connection between two sections of pipe, the straight spigot end of one section is inserted in the flaredout end of the adjoining section. A typical push fit rubber gasket has a hard heel and a soft bulb. Spigot joint article about spigot joint by the free. Apr 29, 2020 chapter 7 cotter and knuckle joints machine design, mechanical engineering mechanical engineering notes edurev is made by best teachers of mechanical engineering. Cotter joints use a transverse wedge with cylindrical or conical surfaces, and a longitudinal wedge.
Appropriate slots are cut in the sleeve and in the cylindrical rods. Before going into detailed steps to design the dimensions of the knuckle joint, it is essential to get oriented with all its components and their functions. The cotter is locked in position by means of a screw as shown in fig. The joint is made by caulking in spun yarn jute and then filling the remainder of the joint space by molten lead and then thoroughly caulking the lead. Tyton type socket spigot push fit joints socket and spigot joints tyton are assembled with a rubber gasket as shown in the above detail. Restrained socket joints 9 restrained socket joints 9. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users.
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