The Pull-down shoulder press is a two in one machine that helps in making your chest muscles, shoulders, and arms stronger. Pull down helps to develop upper back and chest, while shoulder press helps to develop shoulders and arms. This machine is very common in the gym, and the manufacturing process of this assembly is divided into different parts. For this semester project we have developed this machine by different manufacturing processes in the mechanical workshop. The processes that were used in the process of manufacturing are:  Machining  Drilling  Cutting  Bending  Arc welding  Hammering In the following report we are going to discuss the drafts, Engineering drawings, 3D modeling and manufacturing processes in making components and in the end whole machine in detail. One of our main decisions was to start the development of equipment from scratch by making, assembling individual pieces and parts, and eventually compiling into the respected machine. When starting from scratch and assembling individual parts, we have decided to design our own model. It gave us a complete control of what our gym equipment looks like. This type of machine building is typically done by purchasing a bulk parts kit package. As we have built our own equipment from scratch using the metal and workshop materials and manufacturing methods. In some cases, this is the most economical path to designing your own equipment from scratch. Regardless of the design path we pursued, the manufacturing of our equipment is of our choosing—as we used processes mentioned above. Main part of any equipment and machine is the type of material used. We have used the iron and steel mainly.

1. COMSATS UNIVERSITY ISLAMABAD WAH CAMPUS
PROJECT REPORT:
SUBJECT: MANUFACTURING PROCESS
CLASS:6A-BME
GROUP MEMBERS:
FA19-BME-039-------------ALISHBA JAVED
FA19-BME-031--------SULEIMAN RABBANI
FA19-BME-022-------------HAMAYUN MALIK
FA19-BME-052------------ASHAN AKHTAR
FA19-BME-067-------MUHAMMAD SAAD
SUBMITTED TO:
SIR SHAH NAWAZ
PROJECT:
“Pull down gym shoulder press”

2. Contents
1. Introduction 2
2. Usability 3
3. Components and Material selection 4
3.1 Market Survey 4
3.2 Materials 4
3.3 Tools 5
4. Designing 5
5. Engineering Drafts 5
6. 3D Model 5
7. Components manufacturing 7
8. Assembly 9
9. Exercise Technique 9
10. Applications: 11
11. Community Service: 11
12. Precautions: 11
13. Conclusion: 11

3. 1.Introduction
The Pull-down shoulder press is a two in one machine that helps in making your chest
muscles, shoulders, and arms stronger. Pull down helps to develop upper back and chest,
while shoulder press helps to develop shoulders and arms.
This machine is very common in the gym, and the manufacturing process of this assembly
is divided into different parts. For this semester project we have developed this machine by
different manufacturing processes in the mechanical workshop. The processes that were
used in the process of manufacturing are:
 Machining
 Drilling
 Cutting
 Bending
 Arc welding
 Hammering
In the following report we are going to discuss the drafts, Engineering drawings, 3D
modeling and manufacturing processes in making components and in the end whole
machine in detail.

4. One of our main decisions was to start the development of equipment from scratch by
making, assembling individual pieces and parts, and eventually compiling into the respected
machine. When starting from scratch and assembling individual parts, we have decided to
design our own model. It gave us a complete control of what our gym equipment looks like.
This type of machine building is typically done by purchasing a bulk parts kit package. As
we have built our own equipment from scratch using the metal and workshop materials and
manufacturing methods. In some cases, this is the most economical path to designing your
own equipment from scratch. Regardless of the design path we pursued, the manufacturing
of our equipment is of our choosing—as we used processes mentioned above. Main part of
any equipment and machine is the type of material used. We have used the iron and steel
mainly.
2.Usability
If we talk about the usability of this gym equipment, we can see that the machine shoulder
press is a variation of the seated barbell shoulder press used to strengthen the muscles of
the shoulders. One would use this machine shoulder press as away to perform the pressing
movement with the focus on isolating the shoulders.
This equipment is a good exercise to pack on lean muscle tissues onto the shoulders,
especially the front and sides of the shoulders. It also works great on chest and back
muscles. The demonstration of the muscle development from this equipment can be seen
in below figure.
Some people do not like machines because the trajectory is completely guided; however,
this rigidity prevents numerous injuries and trauma that you could experience while using

5. bars and dumbbells.
3.Components and Material selection
In this project we have used the raw materials and used them to develop our desired
machine. Some of the basic steps in material selection and components are described
below.
3.1 Market Survey
At first when we were assigned this project our two members surveyed the market from
which we have gained the crucial information on the type of material used in the making of
the gym equipment and machines. From the data we received we analyzed our options and
selected the materials for working. We have seen that the main frames of most equipment
should be solid and strong, that is to make our base frame strong we have used Iron frame.
3.2 Materials
The materials used in the manufacturing of this equipment are follows:
 Iron rods
 Steel bars
 Metal sheets
 Bearings
 Plastic seat
 Fittings
 Metal pipes
 Bolts, Screws
 Iron Pipe
 Nuts
3.3 Tools
The tools used in the manufacturing of this project gym equipment are as follows;

6.  Hammer
 Drilling Machine with drill bit
 Grinder
 Cutter
 Welding Machine
 Measuring tape
 T-scale
 Metal Scrapper
 Clamps
4. Designing
For the designing of this equipment, first we have made a rough draft of how our equipment
should look and similarly work accordingly, next we have set the dimensions of different
materials. The basic steps in designing equipment are as follows:
 Engineering drafts
 3D-Modeling
 Manufacturing and fabrication
5. Engineering Drafts
The engineering drafts of the pull down shoulder press equipment was designed and
developed by our team member before we developed a 3D model and followed up to the
manufacturing of this machine.

7. 6. 3D Modeling
The 3D model of the designed machine is projected on the software SOLIDWORKS.
The model fabricated in the software by our group member has following steps;
1. First, I downloaded Solid works crack from google and after a great struggle, I
installed it on my laptop.
2. After that, I watched some lectures or tutorials on YouTube and started to draw our
model design.
3. Firstly, I select the front plane and draw two straight lines one is the centerline and
the other one is a simple line by using Revolved Boss/base feature I make a round
pipe (the main structure of our model).

8. Reference of point 3
4. Then I make two squares on the pipe at the downside and extrude them. Also, make
them hollow at the required value for the use of bolts or nuts.
Reference of point 4
5. From the above side of the pipe, I make a square and extrude it at the required value
and again make a square at the end with extruding and bend it down at the angle of
45 degrees. [ this extrude is used as a joint]

9. Reference of point 5
6. By using extrude cut feature I cut the 45 degrees bend extrude from the center by
leaving some end sides. And from the left and right sides of the extrude I make a
circular extrude. [used as a bolt to join another part]
Reference from point 6
7. Then I make a square extrude from a 45-degree bend joint to the two square plates
at the down of the pipe or pole and make a type of joint in this square rod. And also
make the handles by using connecting rods for up or down lifting the chair
connecting rod.
Reference from point 7
8. From the mid of the square plates I make a circle extrude used as a connecting rod
and connect it with the main square rod and also make a sitting chair on it.

10. 9. Complete the Diagram of the model.
The front, side and isometric views of the 3D-model are as follows:

11. Front View
Side view

12. Isometric views
7. Components manufacturing
After the designing process, we came to the stage of fabrication in which we have
manufactured the parts before assembling them into a machine. At first, we made the
skeleton/frame of our equipment with iron pipe and fittings with the help of manufacturing
processes like arc welding. In the below image we have done the arc welding for joints on
the frame with which the shoulder press will be attached.
After this we have fabricated other parts according to design in which we have used the
processes of cutting, drilling, hammering etc.
The steps according to which the fabrication of parts was done are as follows;
1. First of all we take a circular iron pipe as a base of our project on which further parts
will be attached.
2. After that we cut two circular pipe of smaller length and bend it.
3. These two pipes were attached to a circular base with the help of welding.
4. We cut two metal plates and make holes in the plates with the help of drill bit.

13. 5. These two metal plates were attached with two circular bending pipes.
6. We cut a rectangle shape pipe. At one end we weld a circular pipe of very small
length. A bearing was connected to another rectangular sized pipe and both

14. rectangular pipes were welded.
7. We cut a metal sheet plate and bend it and then make holes on both ends. This
metal plate is welded to another rectangular sized pipe.
8. After that we take a circular pipe. And then again take a thick metal sheet and make
holes on both ends and welded to a circular pipe and the other end of pipe was
connected to another circular pipe.

15. 9. Rectangular sized pipe was connected to another metal sheet plate.

16. The following parts were manufactured as a result of above operations.
8. Assembly
The equipment which we manufactured according to the manufacturing proceseses in
workshop:
 Machining
 Drilling
 Cutting
 Bending
 Arc welding
 Hammering
The equipment pull down shoulder press is as follows

17. The dimensions of this equipment are as follows;
 The upper rod is 1ft 2 inch and the lower rod is 1ft.
 The metal plate is 6.5 inch.

18.  8.5 inch.
 Handle is 3 ft.

19.  The rod is 7ft 9 inch and 1.5 ft. in ground.

20.  3ft 9 inch.

21. 9. Exercise Technique
Start position:
Sit facing away a pulldown machine or with a resistance band anchored around an
appropriate spot above your head to perform a pull down. Grasp the band / machine with
one hand slightly wider than your shoulders and a hold a dumbbell in the other hand with
shoulder height with palm facing outwards (i.e., in the position to begin a shoulder press)
and shoulder press machine and make sure you adjust the weights to an appropriate level.
Movement:
Simultaneously perform a pull down with one side of your body (squeezing your shoulder
blades as you move) while performing a shoulder press with the other (extending the
dumbbell towards the ceiling). Try to synchronize your movements so you reach the end

22. point on both sides of your body at the same time. Ensure your core is locked on
throughout the movement and your body does not sway or twist from side to side.
Note: This exercise should not be attempted until an individual pull down and an individual
shoulder press has been mastered.
10. Applications:
The machine shoulder press is an exercise that offers more stability and requires less
balance and coordination than shoulder presses with for example dumbbells or a barbell.
That could lead to an increased focus on the muscles worked, and also makes it easy to
learn for a beginner.
Shoulder press machines are straight up more comfortable to use. No fussing with bar
position, bench position, feet position, safety pins and more. You just sit down and get to
work. As lazy as that sounds, I think there is value in making it just a little bit easier to get
you to lift. When I say it should be hard, I mean the exercise itself, if what it takes for you to
give it your all is to have no set up.
One of the reasons shoulder press machines are so popular in gyms all over the world is
that the path the equipment travels is fixed. The manufacturer carefully designs the
equipment so that it gives the exact range of motion needed to work the target muscle and
no more. What this means in practice is that, the chance of you suffering any sort of injury
due to improper form is practically zero. Even if you tried, you literally can't move the pieces
in a way that would hurt you.

23. 11. Community Service:
For community service, the gym exercises have following benefits:
1. Helps you disconnect: Going to the gym helps you disconnect and to evade you from
the routine of the day to day. Performing exercises is a wonderful stress reliever
because it helps you have time for yourself and clear your mind. It is a natural
antidepressant, while we practice some form of sport, we focus 100% on the
exercise so we evade our problems.
2. Increase self-esteem and mood: Exercise makes us feel good, when doing any
physical activity endorphins are released, which are responsible for providing welfare.
This is very simple as long as we consider an exercise routine and focus on the
exercises leaving aside the problems and concerns.
3. Combat the presence of insomnia: After a good workout we will always end up more
tired than if we do not do any kind of sport. The advisable thing is that the physical
activity is practiced throughout the day and not at last hour of the evening-night so
that the organism is not revealed and it does not cost us much more to conciliate the
dream.
4. Meet people and create friendships: Going to a gym opens a range of possibilities to
meet new people. These new bonds become a greater motivation to go to the gym
and exercise. The gym offers many possibilities when it comes to meeting people,
such as making friends and groups with which to find more motivation to go to train
individually.
5. Practice exercise with a professional: At the gym you can practice physical exercise
following the guidelines of a professional who can help you achieve your goals. With
the help of a qualified professional by your side everything will be easier, since it will
create a table of exercises adapted to your needs, so that you achieve your goals in a
more enjoyable and effective way.
6. Healthier life habits: When an exercise routine is established, the mentality and the
body change, and healthy habits are created that consume a greater amount of
energy. This lost energy must be replaced with a good diet, eating accordingly to the
exercise done, not too much or too little, because your body needs a minimum
amount of calories to run and continue to train.

24. 12. Precautions:
To maintain the equipment and keep it operating smoothly, following precautions are as:
 Clean and Lubricate Cable Rod Ends:
Clean and Lubricate Cable Rod Ends. Check cable rod ends to make sure the
shoulder bolts are secure. If cable rod ends are noisy, lubricate them with a silicone
spray lubricant. Spray the lubricant onto the joint where the spherical portion is
enclosed in the outer housing. Wipe off any excess lubricant with a cloth.
 Clean and Lubricate Guide Rods:
Inspect the exposed areas of the guide rods for cleanliness. Using a dry cloth, wipe
any buildup of dirt or grease from the rods.
 Inspect Frames and Movement Arms:
Inspect frames and movement arms monthly for proper function and integrity. Check
for cracks, chipped paint, or rust. Touch up dings and chips in the paint as needed.
Replace any component at first signs of wear.
 Check and Lubricate Seat Adjustment:
The seat adjustment mechanism requires little maintenance. However, because seat
safety is important to the safety of a workout so, check and lubricate seat
adjustment.
 Inspect and Lubricate Bearings and Bushings:
They use high quality bearings designed for strength applications and long service

25. life. So, for proper functioning of the equipment, inspect and lubricate bearings and
bushing. If we lubricate the guide rods regularly, then the bearings will function as
designed. Otherwise, the guide rods may corrode. This can cause the bearings to
become clogged and jammed, leading to actual gouging of the guide rods. Be sure to
remove surface rust and oxidation from the guide rods as soon as you observe it.
13. Conclusion:
In conclusion to this project we have completed almost all processes of manufacturing in
mechanical engineering which were in our course, from welding to hammering to finished
product. We can conclude that from this project we have learnt a lot especially in a practical
way of industry. This semester project helped us understand the basic manufacturing
processes and later on will help students understand engineering mechanics from our
equipment. The hypothetical image of our equipment is as follows: