Machine Drawing

Lecture 2

Dr./ Ahmed Nagib

October 11, 2015

1

Fasteners Threads

Threaded products incorporating helical surfaces are divided into two

groups:

1. Fasteners, designed for holding together the various parts of a

structure, e.g., bolts with nuts, set screws, studs, etc.

2. Various kinds of screws and worms, designed to transform rotary

motion into translational motion, e.g., lifting screws, motion screws

worms, etc.

2

Fasteners Threads

C-Clamp

3

Fasteners Threads

Vice

4

Fasteners Threads

Worm and Worm wheel

5

Fasteners Threads

Valve

6

Fasteners 1. Bolts

A bolt and nut in combination is a fastening device used to hold two

parts together.

7

Fasteners 1. Bolts

The nuts with internal threads engage with the corresponding size of the

external threads of the bolt.

8

Fasteners 1. Bolts

9

Fasteners 1. Bolts

10

Fasteners 1. Bolts

11

Fasteners 1. Bolts

In drawings, threads are not drawn true to life. It would require much

time and work to draw a thread as it really is.

Threads will be drawn as follows

12

Fasteners 1. Bolts

13

Fasteners 1. 1.Through Bolt

14

Fasteners 1. 1.Through Bolt

15

Fasteners 1. 1.Through Bolt

16

Fasteners 1. 1.Through Bolt

17

Fasteners 1. 2. Stud Bolt

18

Stuffing Box

19

Stuffing Box Parts

20

Stuffing Box Parts

21

Stuffing Box Parts

22