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