Why gibs are used in cotter joints?
Gib: Gib is a counterpart of cotter provided to stop the axial movement of cotter when it is being hammered into the drive. Due to tapered edge, the cotter has the tendency to slide out because of vibrations. When the cotter is used with gib this tendency is reduced.
What is cotter joint with Gib?
Gib and cotter joints are used for square or rectangular cross-section rods. The end of one rod fits into the end of the other rod, which is designed as a strap. A gib with a cotter is used to make these joints. The Gib is potentially a cotter but has two gib heads at its ends.
When one GIB is used in a gib and cotter joint then the width of GIB should be taken as?
In the joint, as shown in Fig. 13, one gib is used, the proportions of which are Width of gib, b1 = 0.55 B and width of cotter, b = 0.45 B In case two gibs are used, then Width of each gib = 0.3 B and width of cotter = 0.4 B 3. Failure of the strap end in tension at the location of gib and cotter.
How socket and spigot joint is designed?
of the rod which goes into a socket is also called spigot. A rectangular hole is made in the socket and spigot. A cotter is then driven tightly through a hole in order to make the temporary connection between the two rods.
What is spigot and cotter joint?
A cotter joint, also known as a socket and spigot joint, is a method of temporarily joining two coaxial rods. One rod is fitted with a spigot, which fits inside a socket on one end of the other rod. Slots in the socket and the spigot align so that a cotter can be inserted to lock the two rods together.
How much clearance is provided between the slots and cotter in cotter joint?
1.5 to 3 mm
Clearance provided is generally 1.5 to 3 mm. Cotter gets locked because of the frictional force of the contacting surfaces.
How enlarged diameter of cotter foundation bolt is determined?
Diameter of enlarged end of the bolt and thickness of cotter. t = Thickness of cotter. It will be taken as d1 / 4. The diameter of the enlarged end of the bolt is 34mm, let us take this value as 36mm to be on the safe side of the design.
What is socket and spigot Cotter joint?
Why are clearances provided between cotter and spigot socket?
First the clearance allow the axial adjustment between the two rods . the second reason is that when the cotter is driven in the slots the cotter moves till the face of collar touches the collar end of the spigot and the tapered face touches socket end due to clearance.
What is a spigot used for?
A spigot is a faucet, a device to turn water on and off. If you leave a spigot open, the water will keep flowing. In the U.S., most of us call an indoor valve (in the kitchen or bathroom) a faucet, and the outdoor one a spigot.
What is a 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. 1 and the other end of the other rod (say B) is inserted into a socket. The end of the rod which goes into a socket is also called spigot. A rectangular hole is made in the socket and spigot.
How does a gib and Cotter joint work?
A gib and cotter joint is usually used in strap end (or big end) of a connecting rod as shown in Fig. 1. In such cases, when the cotter alone (i.e. without gib) is driven, the friction between its ends and the inside of the slots in the strap tends to cause the sides of the strap to spring open (or spread) outwards as shown dotted in Fig. 4 (a).
What are the three components of a cotter joint?
Cotter Joint has mainly three components – spigot, socket and cotter as shown in Figure 9.1. Spigot is formed on one of the rods and socket is formed on the other. The socket and the spigot are provided with a narrow rectangular slot. The cotter is tightly fitted in this slot.
How to use gibs and jibs?
When one gib is used, the cotter with one side tapered is provided and the gib is always on the outside as shown in Fig. 4 (b). 2. When two jibs are used, the cotter with both sides tapered is provided. 3. Sometimes to prevent loosening of cotter, a small set screw is used through the rod jamming against the cotter. 1. Cotter and Knuckle Joints 2.