CHAPTER 13

Cotter and Knuckle Joints

Chapter Objectives

  1. Design a cotter joint for a given load to be transmitted, after assuming allowable stresses in cotter and rods.

  2. Design a knuckle joint for a given load to be transmitted, after assuming allowable stresses in pin and rods.

13-1 INTRODUCTION

Cotter and knuckle joints are temporary fasteners used to connect two rods transmitting axial force. A cotter is a tapered piece of flat, mild steel connecting two coaxial rods. The cotter is inserted in a transverse direction to the rods. It is tapered on one side or on both sides so that it can be driven into the rectangular slots provided in the rods. The cotter contacts the two rods through frictional contact force.

A knuckle joint, on the ...

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