What is cotter joint explain design of cotter joint?

What is cotter joint explain design of 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.

What are the different types of cotter joint?

There are three types of cotter joint for connecting two rods by one coater:

• Socket and spigot cotter joint.
• Sleeve and cotter joint.
• Gib and cotter joint.

Which material is used in cotter joint?

The material selected for cotter joint is plain carbon steel of Grade 30C8 which is having (Syt=400N/mm2), so that cotter joint will fail above (Syt=400N/mm2). By the calculation, we found that maximum force applied is 50KN.

What is the recommended taper of cotter in cotter joint?

i) It is simple to remove the cotter and dismantle the joint parts. ii) Taper ensures tightness of the joint in operation and it prevents slackening of the parts. Generally the value of taper on cotter is 1 in 48 to 1 in 24.

Where do you use cotter joint?

Cotter joint is used to connect two rods subjected to axial tensile or compressive loads. Cotter joint is widely used to connect the piston rod and cross head of the steam engine, so as a joint between the piston rod and the tailor pump rod, foundation bolt etc.

What is cotter joint in engineering drawing?

It is used for fastening two circular rods. In this type of joint, a socket is formed by enlarging the end of one rod. The end of spigot end of the second shaft is fitted in this socket. A cotter is driven into rectangular holes, tightly which are in alignment except an adjustment of a few millimeters.

How do you find the length of a cotter?

The length of cotter (l) is taken as 4 d. 13. The taper in cotter should not exceed 1 in 24. In case the greater taper is required, then a locking device must be provided.

What is the weakest part of a cotter joint?

From the constructional details it is clear that the manufacturing of spigot and socket is difficult than the cotter also if the cotter fails it is easy to replace with very less economical loss. Hence the cotter is kept as weakest part.

Why clearance is necessary for the cotter joint?

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.

How do you find the length of a cotter joint?

What is the main difference between key and cotter joint?

Keys are usually driven parallel to the axis of the shaft that are subjected to torsional motion. Cotters are normally driven at right angles to the axes of the connected parts.

How do you find the thickness of cotter?

Thickness Of Cotter Joint calculator uses Thickness of cotter = 0.31*Diameter of rod to calculate the Thickness of cotter, The Thickness of Cotter joint formula is used to connect two rods subjected to axial tensile or compressive loads.

What are the possible ways of failure of a cotter?

The various modes of failures in cotter joint are discuss below:

• Failure of the rods in tension.
• Failure of the spigot in tension across the weakest section.
• Failure of the rod or cotter in crushing.
• Failure of the socket in tension across the slot.
• Failure of cotter in shear.
• Failure of the socket collar in crushing.

How much clearance is provided between the slots and cotter joint?

1.5 to 3 mm
Clearance provided is generally 1.5 to 3 mm.

How do you create a cotter joint?

Cotter joint is used to connect two rods subjected to axial tensile or compressive loads. It is not suitable to connect rotating shafts which transmit torque. Axes of the rods to be joined should be collinear.

What is the length of cotter in a sleeve and cotter joint?

What is sleeve in sleeve and cotter joint?

1. Sometimes, a sleeve and cotter joint as shown in Fig. 1 and 2, is used to connect two round rods or bars. In this type of joint, a sleeve or muff is used over the two rods and then two cotters (one on each rod end) are inserted in the holes provided for them in the sleeve and rods.