Socket and spigot cotter joint the socket and spigot cotter joint is shown in fig. It is required to design a cotter joint to connect two steel rods of equal diameter. Mar 06, 2020 a cotter joint, also known as a socket and spigot joint, is a method of temporarily joining two coaxial rods. Chapter 7 cotter and knuckle joints machine design. The assembly and dismantling of parts of the cotter joint is quick and simple. To understand the design steps let take a question and solve it step by step. Keys, cotter and unit 5 key, cotter and knuckle knuckle.
Keys, cotter and unit 5 key, cotter and knuckle knuckle joints joints structure 5. Design of cotter joint free download as powerpoint presentation. Design of socket and spigot cotter joint bending strength of. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Sleeve and cotter joint, socket and spigot joint and. State the different applications of the knuckle joint. The cotter joint acts as a steam engine connecting rod strap end. 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. 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. Ther are two reasons for assuming a lower fos for the cotter. Socket and spigot cotter joint autodesk inventor part. This type of joint is mainly used for cast iron pipes of all sizes and concrete pipes below 60 cm in diameter. 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. This video explains design procedure of socket and spigot type of the cotter joint.
Pdf machine elementsi lecture notes meen322 handout to. Figure shows the details of the parts of an socket and spigot. Cotter joint the cotter joint offers the following advantages. A cotter joint is temporary joint and used to connect two coaxial rods or bars which are subjected to axial tensile and or compressive forces. Design of cotter joint bending strength of materials. Tierod and pipe joint i turnbuckle ii flange pipe joint 4. The spigot is inserted into the socket such that the rectangular slots of both spigot and socket can meet with each other and then the cotter. Socket and spigot cotter joint 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. Failure of cotter joint may causes accident, so it is necessary to design cotter joint to. Sleeve cotter joint pdf the working of the cotter andsleeve and cotter and gib are shown below. Spigot fits inside the socket and the cotter is passed through.
It is used to connect two coaxial rods which are subjected to either axial tensile or axial compressive load. Knuckle joint is yet another to join rods to carry axial force. Spigot is formed on one of the rods and socket is formed on the other. The material selected for the joint has the following design stresses 80 mpa in tension, 60 mpa in shear and 150 mpa in compression. Allowable tensile stress 90 mpa allowable crushing stress 120 mpa allowable shear stress 60 mpa. Design of keys, stresses in keys cotter joints spigot and socket, sleeve and cotter, jib and cotter joints knuckle joints. A spigot and socket joint for connecting two pipes, comprising a socket end assigned to one pipe and into which a spigot end of the other pipe, which has a support strip, can be inserted and which has a radially inwardprotruding edge with at least one ring segmentshaped recess, and a locking device for locking the spigot end in the socket end. New delhi 110025 design of socket and spigot cotter joint mohammad afazal, university polytechnic, jmi, new delhi 110025 mohammad afazal, university polytechnic, jmi, new delhi 110025 p load carried by the rod d diameter. Each rod is subjected to an axial tensile force of 50 kn. Design of joint s k mondals chapter 1 shear stress 3 load 60 10 50nmm2 2 area 2 50 12. The dimensions for a socket and spigot cotter joint may be obtained by considering the. Material of two rods and cotter is steel 30 c8 s yt 400nmm2, s yc 2 s yt and s sy 0.
One of the rods has a socket end into which the other rod is inserted and the cotter is. Design a socket and spigot joint to resist a tensile load of 28 kn. The compressive load is taken up by the collar on the spigot. The permissible crushing stress is x times the permissible tensile stress for the material of spigot where x 1. Design a cotter joint subjected to a tensile load of 35 kn and a. The cotter joint is used between the railway bogies. Design a socket and spigot type cotter joint to sustain an axial load of 100 kn. One rod is fitted with a spigot, which fits inside a socket at the end of the other rod. For example two rods may be joined coaxially and when they are pulled apart they should not. See all design to learn to design and assemble the part. Can the cotter joint be used to connect slide spindle and fork of valve mechanism. This bending stress induced in the cotter should be less than the allowable bending stress of the cotter. The permissible stresses for the rods, spigot end and socket end are. Following are the three commonly used cotter joints to connect two rods by a cotter.
Cotter joint with simulationsocket and spigot joint part. Cotter joint has mainly three components spigot, socket and cotter as shown in figure 2. The grabcad library offers millions of free cad designs, cad files, and 3d models. The design of these types of joints are discussed, in detail. Saravanakumar, ap design a cotter joint to transmit a load of 90 kn in tension or compression. It consist of 1 spigot 2 socket cotter application. Design procedurethe dimensions for a socket and spigot cotter joint may be obtained by considering the various modes of failure 1 failure of. 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. Expired lifetime application number us717035a inventor johnson percy graham morgan.
Problem 2 design a cotter joint to transmit a load of 90 kn in tension or compression. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. The socket and the spigot are provided with a narrow rectangular slot. The assembly consists of inserting the spigot end into the socket end and putting the cotter into their common slot. The fos for the rods, spigot end and socket end is assumed as 6, while for cotter, it is 4. Spigot and socket joint pipes are joined and sealed using either a rolling rubber or a sliding rubber ring respectively. Explain the design process for knuckle joint with neat sketch. Unit 5 key, cotter and knuckle joints dpg polytechnic. Types of cotter joints socket and spigot cotter joint. If the allowable stresses in tension, compression and shear for the socket, rod.
It acts as a joint between the crosshead and the piston rod of steam engine. On the basis of strength, the material of the two rods and the cotter is selected as plain carbon steel of grade 30c8 syt400mpa step 2. Couplings i unprotected flange coupling having socket and spigot arrangement. Assemble these parts correctly, and then draw the following views using scale 1. The effect of stress concentration due to the slot is neglected. Design procedure of socket and spigot cotter joint, cotter. Design procedure the dimensions for a socket and spigot cotter joint may be obtained by considering. Muttagi, slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Solidworks, exercise files, training files, mechanical. With autodesk gallery, you can view and present 3d model and file easily online.
The spigot of a cotter joint has a diameter d and carries a slot for cotter. Design of socket and spigot joint free download as powerpoint presentation. The socket and spigot cotter joint is shown in fig. Assumethe following stressesfor socket, spigot andcotter. It is usually used in connecting a position rods to the cross head of a reciprocating steam engine, strap end of connecting rod etc. Socket and spigot cotter joint and its design engineers. State the different applications of the cotter joint. Socket and spigot cotter joint solid works part design.
Socket and spigot cotter joint sleeve and cotter joint gib and cotter joint applications. Which of the following is not a part of cotter joint. Design of various types of riveted joints under different static loading conditions, eccentrically loaded. As long as axial forces act, cotter joint can be employed. Design a spigot and socket type cotter joint to transmit. Select suitable materials and design stresses for various parts of the joint. The slots in the socket and the spigot align so that a cotter can be inserted to lock the two rods together. Design of socket and spigot cotter joint the section modulus of the cotter. The design of these types of joints are discussed, in detail, in the following pages. For steeper portions of risers, nipples are used to provide belltobell contact.
The official platform from autodesk for designers and engineers to share and download 3d models, rendering pictures, cad files, cad model and other related materials. Design a socket and spigot cotter joint to connect two steel rods of equal diameter. Let, p load carried by the rods, d diameter of the rods, d 1 outside diameter. Design of socket and spigot joint bending mechanics. Design a spigot and socket type cotter joint to transmit reversible load of 50kn. Design of spigot and socket cotter letp load carried by the rods,d diameter of the rods,d1. Design of socket and spigot cotter joint free download as word doc. A rectangular hole is made in the socket and spigot. Design cotter joint free download as powerpoint presentation. When the cotter is hammered, the rods are drawn together and tightened. Figure shows the details of the parts of an socket and spigot cotter joint. A cotter joint is a temporary fastening and is used to connect rigidly to coaxial shafts which are subjected to axial tensile or compressive forces. Module 5 design of keys, cotters and knuckle joints.
Design of cotter joint a cotter is a rectangular element. 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. Select suitable material, fos and draw an informative sketch. 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. Types of cotter joint there are three types 1 socket and spigot cotter joint 2 sleeve cotter joint. Assume the following stresses for socket, spigot and cotter. The load is usually acting axially, but it changes its direction and hence the cotter joint must be designed to carry both the tensile and compressive loads. Design of socket and spigot cotter joint slideshare. Permissible shear stress for the cotter material, and. The factor of safety for rods, spigot end and socket end.
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