This document introduces a presentation on solving a design problem. It provides information on the course, teachers, and presenter. It then outlines a problem involving determining the axial load and frictional work of a 4-inch shaft supported by an annular step bearing with a 4-inch outer diameter and 3/4-inch inner diameter, turning at 175 rpm with an allowable average bearing pressure of 180 psi. The document lists the given values and required values to be calculated and provides a brief overview of the solution steps to be shown.

1. Welcome To
The Presentation
On
SOLVING A DESIGN PROBLEM

2. Course Title: Sessional on Machine Design II
Course No: ME 3218
Course Teachers
Dr. Mohammad Mashud
Professor,
Dept. of Mechanical Engineering
KUET
Khulna-9203
Md. Golam Kader
Professor,
Dept. of Mechanical Engineering
KUET
Khulna-9203
Presented By
Md. Shariful Islam
Roll:1205004
Section: A

3. Problem
 A 4-in. shaft, turning at 175 rpm, is supported on a
step bearing. The bearing area is annular, with a 4-
in. outside diameter and a 3/4 –in. inside diameter.
Take the allowable average bearing pressure as
180 psi.(a) What axial load may be supported? (b)
What is the approximate work of friction?

4. Given:
Shaft diameter = 4 in
Shaft speed n= 175 rpm
Bearing is annular: Outside diameter D0 = 4 in
Inside diameter Di = ¾ in
Average bearing pressure p =180 psi
Required:
a)Axial load W = ?
b)Frictional work Uf = ?
Solution
Uf

5. Solution
We know that

6. Solution(contd)

7. CAD Design

8. CAD Design(Rendered View)