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. Design of various types of riveted joints under different static. Spigot and socket joint pipes are joined and sealed using either a rolling rubber or a sliding rubber ring respectively. This ensures tightness of the joint in operating condition and prevents loosening of the parts socket and spigot cotter joint notation used. Knuckle joint, cotter joint and turn buckle the article contains the questions and answers related to the design of joints including knuckle joint, turn buckle and cotter joint. Instructions the parts and assembly of the cotter joint is. Design of socket and spigot cotter joint linkedin slideshare. The end of the rod which goes into a socket is also called spigot. Nov 29, 20 spigot and socket cotter joint this type of joint is used for round rods. A backing ring is used inside the pipe joint when making a a butt weld b fillet weld c sleeve weld d socket weld e tube weld. Chapter 7 cotter and knuckle joints machine design. Introduction friction clutches torque transmitting capacity uniform pressure theory uniform wear theory multidisk clutches cone clutches centrifugal clutches friction materials for clutches. Sep 18, 2017 socket and spigot joint assembly and sectional views for more machine drawing videos.
The cotter passes through slots made in two coaxial parts and thus prevent the relative motion between them. The molten lead solidifies quickly and makes the joint water tight. The drawings of socket, spigot, and cotter are studied. Ppt cotter joint powerpoint presentation free to view. Cotter pulls the rod and socket tightly together clearance must be provided for adjustment. Socket and spigot cotter joint the socket and spigot cotter joint is shown in fig. Design of socket and spigot joint free download as powerpoint presentation. Sleeve and cotter joint is a type of joint used to typically connect two similar coaxial cylindrical rods. Unit v keys, cotters and knuckle joints design of keys stresses in keyscotter jointsspigot and socket, sleeve and cotter, jib and cotter jointsknuckle joints. A ball joint consists of a bearing stud and socket enclosed in a casing.
Cotter joint is used to connect two rods or components which are subjected to tension or compression. Spigot and socket cotter joint this type of joint is used for round rods. Spigot and socket jointcotter joint rods, having axial tensile or compressive forces are connected by cotter joints. Rods may be of different cross sections like circular or square. Appropriate slots are cut in the sleeve and in the cylindrical rods.
Design of gib and cotter joint for strap end of a connecting. Ppt knuckle joint powerpoint presentation free to view. The computeraided design cad files and all associated. The woodru cylindrical disc having segment key is capable of tilting in a r curvature as the disc from which. It is uniform in thickness but tapering in width, generally on one side. This is due to the fact that, the cost of cotter is less as compared to socket and spigot. Spigot and socket joint definition and meaning collins. Cotter joints can be quickly assembled as well as disassembled. Permissible shear stress for the cotter material, and.
Let p load carried by the rods, d diameter of the rods, d1 outside diameter of socket, d2 diameter of spigot or inside diameter of socket, d3 outside diameter of spigot collar, t1 thickness of spigot. Determine the thickness of a 120 mm wide uniform plate for safe continuous operation. The 3d models of socket and spigot joint parts socket, spigot, cotter are created using autocadcatia. Design a socket and spigot cotter joint to connect two steel rods of equal diameter. All the parts of the joint are made from same material with following. It includes the various applications of the joints and also the comparison of the joints. The spigot of a cotter joint has a diameter d and carries a slot for cotter. Material of two rods and cotter is steel 30 c8 s yt 400nmm2, s yc 2 s yt and s sy 0.
Nov 22, 2017 a gib of cotter joint b sleeve and cotter joint c spigot socket cotter joint d knuckle joint e universal coupling. Socket and spigot cotter joint and its design engineers gallery. It contains a sleeve and two wedge shaped tapered cotters. What are the practical application of cotter joint. Hence, if at all there is a failure, cotter should fail instead of socket and spigot. The shear plane in case of bolts should a be across threaded. The socket and spigot cotter joint is shown in fig. The assembly of socket and spigot joint was created as per the drawing specification.
Socket and spigot cotter joint for 20mm dia shaft socket and spigot cotter joint for 20mm dia. Each rod is subjected to an axial tensile force of 50 kn. Jun 03, 2017 a gib of cotter joint b sleeve and cotter joint c spigot socket cotter joint d knuckle joint e universal coupling. The lateral bearing edges of the cotter and the bearing slots are generally made semicircular instead of straight fig. One rod end carries a spigot the end to be inserted while the other rod end is finished in form of a socket. Design of gib and cotter joint for strap end of a connecting rod. Muttagi, slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. It has uniform thickness and the width dimension is given a slight taper.
Key points to remember a power screw is a device which is used to convert rotary motion into translatory motion and thereby transmitting power. Roda is provided with a socket end, while rodb is provided with a spigot end. Aug 31, 2014 a gib of cotter joint b sleeve and cotter joint c spigot socket cotter joint d knuckle joint e universal coupling. The socket and spigot cotter joint is shown in fig 2. Winner of the standing ovation award for best powerpoint templates from presentations magazine. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Design and draw a neat sketch of spigot rod for the cotter joint using the following data. Types of cotter joints following are the three commonly used cotter joints to connect two rods by a cotter. Spigot and socket joint, joints in water supply pipes. This cavity or slot is kept slightly out socket and spigot joint front view 32 3 r 50 o 24 3 o24 o30 o66 8 28 40 90 4 40 28 10 r a front view full in section left side view roda socket cotter collara collarb spigot rodb socket and spigot joint fig 4.
Sleeve cotter joint pdf the working of the cotter and sleeve and cotter and gib are shown below. In a socket and spigot cotter joint, one end of the rods say a is provided with a socket. 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. Spigot and socket joint cotter joint rods, having axial tensile or compressive forces are connected by cotter joints. A cotter is a flat wedge shaped piece of rectangular cross section and its width is tapered either on one side or on both sides from one end to another for an easy adjustment socket cotter spigot. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces.
Design of socket and spigot joint bending mechanics. In a socket and spigot cotter joint, one end of the. Why the cotter in the cotter joint is kept as weakest part. 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. The end of one rod is forged in the shape of a socket and the other in the shape of a spigot refer fig 21. A cotter joint is used to connect one end of a rod is provided with a socket type of end and the other end of the rod is inserted to a socket.
Muttagi, slideshare uses cookies to improve functionality and performance, and to provide. Design of machine membersi f the usual proportions of the gib width, w d 4. They are used on virtually every automobile made and work similarly to the ball and socket design of the human hip joint. When the cotter is hammered, the rods are drawn together and tightened. Exploded view of cotter joint mainly cotter joint is manufacture by using deformation process. This document is highly rated by mechanical engineering students and has been viewed 1592 times. Unit v keys, cotters and knuckle joints design of keys stresses in keys cotter joints spigot and socket, sleeve and cotter, jib and cotter joints knuckle joints.
The permissible stress for carbon steel under static loading is generally taken as a 20003000 kgpm2 b 30004000 kgcm2 c 40004500 kgcm2. The factor of safety for rods, spigot end and socket end. A metal is either hot or cold, is plastically deform into desire shape. Determine the thickness of a 120 mm wide uniform plate for safe continuous. Unit vi shafts design of solid and hollow shafts for strength and rigidity design of shafts for combined. A key attached movement is known as feather turning moment and also permits key being a sliding fit in the key 6. A cotter joint for connecting two rods along which tension or compression act is made with ends of the rod especially made.
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. The assembly consists of inserting the spigot end into the socket end and putting the cotter into their common slot. Design of cotter joint socket and spigot joint it is used to connect two coaxial rods under the action of axial tensile or compressive loads. Socket and spigot cotter joint is used to connect circular rods. Cotter joint the cotter joint offers the following advantages. The shear plane in case of bolts should a be across. May 11, 2020 chapter 7 cotter and knuckle joints machine design, mechanical engineering mechanical engineering notes edurev is made by best teachers of mechanical engineering. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from.
One of the rods is formed into a socket by enlarging its end while the other rod, called spigot end is formed with enlarged diameter and an integral collar as shown in fig 8. It is required to design a cotter joint to connect two steel rods of equal diameter. The dimensions for a socket and spigot cotter joint may be obtained by considering the. Spigot is formed on one of the rods and socket is formed on the other. Typical applications involve screw jack,fly press, c clamp,testing machines, lead screw of lathe machine and many other machine tool applications. Socket and spigot cotter joint autodesk inventor part. Modeling and analysis of cotter joint ijert journal. Following are the three commonly used cotter joints to connect two rods by a cotter. A cotter is driven tightly through the slots in the rods which are kept slightly mis aligned. Design a cotter joint subjected to a tensile load of 35 kn and a. Joint between piston rod and crosshead of steam engine 2.
Sleeve and cotter joint, socket and spigot joint and. The dimensions for a socket and spigot cotter joint may be obtained by. The construction of a cotter joint, used to connect two rods a and b is shown in fig. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. The factor of safety for rods, spigot end and socket. Design of cotter joint cotter joint is also called as socket and spigot joint. The end of the bar has a hole in it and it is called a lug.
A cotter is a rectangular cross section of uniform thickness and varying width with one of its longer sides. Cotter joint free download as powerpoint presentation. The effect of stress concentration due to the slot is neglected. Cotter joint has mainly three components spigot, socket and cotter as shown in figure 9. The cotter has uniform thickness and the width dimension b is given a slight taper. The ends are normally made by forging and rectangular hole is also created. Design and analysis of knuckle joint by using fea the most commonly used types of cotter joints are. Cotter joint has mainly three components spigot, socket and cotter. Sleeve cotter joint pdf the working of the cotter andsleeve and cotter and gib are shown below. Socket and spigot cotter joint for 20mm dia shaft 3d cad.
Gib and cotter joint socket and spigot cotter joint. The slots in the spigot rod and in socket are made slightly larger then the cotter with one side straight and the other side tapered. Design a socket and spigot joint to resist a tensile load of 28 kn. Axial load 30 kn tensile stress 50 nmm 2 2crushing stress 90 nmm 2and shear stress 35 nmm. When cotter is inserted in slot through socket and spigot and pressed by means of hammer, it becomes tight due to wedge action. Cotter joint cotter joints with socket and spigot ends for circular bars slots are wider than the cotter. Machine design mechanical engineering multiple choice. A cotter is driven tightly through the slots in the rods which are kept. The assembly and dismantling of parts of the cotter joint is quick and simple. Sleeve and cotter joint, socket and spigot joint and knuckle joint drawn by r. A cotter joint for connecting two rods along which tension.
See all design to learn to design and assemble the parts in diff ways and methods. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Restrained socket joints 9 restrained socket joints 9. 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. 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. Keys, cotter and unit 5 key, cotter and knuckle knuckle. Design a typical cotter joint to transmit a load of 50 kn in tension or. Mechanical engineering machine design important mcq pdf all. One of the rods is formed into a socket by enlarging its end while the other rod, called spigot end is formed with enlarged diameter and an integral.
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