The document presents a student project on designing a portable belt grinder for hand crafts. It includes sections on the introduction, objectives, model design, uses and safety considerations of belt grinders, abrasive belt information, photos of the project model, advantages and limitations, and applications. The project aims to provide a versatile grinding machine for hand crafts and small industries through the design and fabrication of an abrasive belt grinder.

1. || Jai Sri Gurudev||
Sri Adichunchanagiri Shikshana Trust®
SJB INSTITUTE OF TECHNOLOGY
(Affiliated to Visvesvaraya Technological University, Belagavi & Approved by AICTE, New Delhi.)
Accredited with NAAC ‘A’ grade
No. 67, BGS Health & Education City, Dr. Vishnuvardhan Road Kengeri, Bengaluru – 560 060
Department of Mechanical Engineering
Semester : 6TH SEMESTER
Academic Year : 2022-23
Batch No: 06
Mini Project work Review
Presentation on
“PORTABLE BELT GRINDER FOR
HAND CRAFTS”
By
Mr. MOHITH N 1JB21ME405
Mr. PAVAN KUMAR C N 1JB21ME408
Under The Guidance Of
Mr. SHANAKARA D R
Asst. Professor, Dept of Mechanical Engineering

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Department of Mechanical Engineering, SJBIT
CONTENTS
INTRODUCTION
OBJECTIVES
MODEL
USES & SAFETY
ABRASIVE BELT INFORMATION
PHOTOS
ADVANTAGES & LIMITATIONS
APPLICAIONS

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Department of Mechanical Engineering, SJBIT
INTRODUCTION
The mini belt grinder is a compact power tool designed for grinding, polishing, and
shaping tasks in metal working and wood working applications. It provides users with
a versatile and efficient solution for achieving precise and professional results in a
small-scale format. Mini belt grinders have gained popularity due to their portability,
ease of use, and ability to handle various materials with different grit belts.

4. PURPOSE
The purpose of this project is to provide a comprehensive
understanding of mini belt grinders, including their working
principle, components, applications, advantages, limitations,
safety considerations, and market trends. By examining these
aspects, readers will gain insights into the capabilities and
potential uses of mini belt grinders in different industries.
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Department of Mechanical Engineering,SJBIT
1. "The Complete Guide to DIY Belt Grinders" by Eamon Walsh - This comprehensive
guide covers various types of belt grinders, including mini belt grinders, and provides
detailed instructions and tips for building your own.
2. "Making a Mini Belt Sander and Grinder" by Matthias Wandel - This YouTube video by a
popular wood working enthusiast showcases the construction of a mini belt sander using
readily available materials.
3. "Belt Grinder from Plans Homemade belt grinder constructed from plans" - This online
forum thread on Practical Machinist features a discussion and shared plans for building a
mini belt grinder.
4. "Mini Belt Grinder" by Chris | Outdoors - This YouTube video demonstrates the usage
and capabilities of a commercial mini belt grinder and provides insights into its features.
5. "Mini Belt Grinder" by Dirty Smith - This YouTube channel specializes in blacksmithing
and metalworking projects and showcases the construction and operation of a homemade
mini belt grinder.
LITERATURE REVIEW

6. OBJECTIVE
1. This report focuses on mini belt grinders and does not cover
larger industrial belt grinders or other types of power tools.
2. The report primarily targets professionals, hobbyists, and
individuals interested in metal working and wood working
activities.
3. The main objective of this project is to design and fabricate an
abrasive belt grinding which can be used as versatile grinding
machine; the work area can be rotated from 0 degree to 180
degree.
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METHODOLOGY
COMPARATIVE ANALYSIS OF POPULAR MODELS
ModelA
Specifications:
 Power: 500 Watts
 Belt Speed: 3,000-5,000 RPM
 Dimensions: 12 x 6 x 8 inches
Features:
1. Compact Design: ModelA is designed to be compact and lightweight,
making it easy to transportand store.
2. Variable Speed Control: The belt speed can be adjusted between
3,000 and 5,000 RPM, allowingfor versatility in grinding and
polishing applications.

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Department of Mechanical Engineering,SJBIT
Model B
Specifications:
 Power: 775 Watts
 Belt Speed: 2,500-6,000 RPM
Features:
1. Compact Design: Model B is equipped with a 775-watt motor,
providing increased power fordemanding grinding tasks.
2. Longer Belt Size: With a 2-inch wide and 36-inch-long belt, it
provides a larger grinding surfacearea and increased efficiency.

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Department of Mechanical Engineering,SJBIT
Model C
Specifications:
 Power: 1000 Watts
 Belt Speed: 2,000-8,000 RPM
 Dimensions: 16 x 10 x 12 inches
Features:
1. Compact Design: Model C is equipped with a robust 1000-watt
motor, providing exceptionalpower for heavy-duty grinding and
polishing tasks.
2. Induction Motor: Model C utilizes an induction motor, known for its
high torque and durability,making it suitable for continuous and
demanding grinding operations.

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Department of Mechanical Engineering,SJBIT
Model D
Specifications:
 Power: 600 Watts
 Belt Speed: 2,000-4,500 RPM
 Dimensions: 10 x 6 x 8 inches
Features:
1. Compact and Lightweight Design: Model D is designed to be compact
and lightweight, makingit portable and easy to manoeuvre in small
spaces.
2. Universal Motor: Model D utilizes a universal motor, providing
sufficient power for light tomedium-duty grinding operations.

11. Features:
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Department of Mechanical Engineering,SJBIT
1. Powerful Motor: The model is equipped with a 775-watt motor,
providing increased power for demanding grinding tasks.
2. Wide Speed Range: It offers a wide range of belt speeds, adjustable
between 2,500 and 6,000 RPM, allowing for precise control and
versatility in various applications.
3. Longer Belt Size: With a 2-inch wide and 36-inch-long belt, it provides
a larger grinding surface area and increased efficiency.
4. Brushless Motor Technology: The brushless motor in the model
offers higher efficiency, lower maintenance, and longer lifespan
compared to brushed motors.
5. Sturdy Construction: It features a robust and durable construction,
ensuring stability and longevity even during heavy-duty use.
6. Belt Tracking System: The model incorporates a reliable belt tracking
system that keeps the belt in alignment during operation, minimizing
belt wear and enhancing performance.

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Department of Mechanical Engineering,SJBIT
Design of 3D model
3D Modeling of Belt Grinding Machine

13. USES & SAFETY
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Department of Mechanical Engineering, SJBIT
How do I use a mini belt grinder?
• Choose the right belt for the job. Different belts are designed for different
materials and applications.
• Adjust the tracking of the belt to ensure it is running straight and true.
• Turn on the machine and let it come up to speed.
• Hold the work piece firmly against the belt and move it back and forth to grind
or sand it down.
• Use light pressure at first and gradually increase it as needed.
• Keep your fingers and other body parts away from the moving belt.
• Turn off the machine when you are finished.
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14. Safety Precautions when using a mini belt grinder
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 Wear proper Personal Protective Equipment (PPE), including eye and hearing
protection, leather gloves, natural fiber clothing, an apron, and respiratory
protection as needed.
 Do not wear loose-fitting clothing or have hanging strings.
 Maintain good footing, balance, and work position. Do not carry the grinder
with your finger on the switch.
 Check the condition of the machine before use. Look for broken parts or signs
of wear.
 Lock the safety hood in place and give it a tug to check its placement.
 Remove all combustible materials near the work area to avoid the risk of fire.

15. ABRASIVE BELT INFORMATION
Abrasive belts consist of abrasive grains applied to a backing made of
cloth, film, foam and sponge, paper, or other material. Abrasive belts are mounted on
rotating wheels or pulleys and are used in applications such as surface finishing,
sanding, and grinding. There are three categories of abrasive belts: Narrow belts for
bench sanders or back stand grinders, portable or file belts for use on small hand
held power tools, and wide belts for sanding or finishing large flat surfaces and for
abrasive planning or lumber dimensioning.

16. SPECIFICATION OF SAND PAPER BELT
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PHOTOS

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Department of Mechanical Engineering, SJBIT
ADVANTAGES & LIMITATIONS
OF MINI BELT GRINDER
1. Versatility and Flexibility
2. Compact Size
3. Efficiency and Speed
4. Ease of Use
5. Cost-Effectiveness
6. Noise and Vibration
7. Safety Precautions
8. Size and Stability
9. Accessibility for Maintenance
10.User Training and Experience

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APPLICATIONS
1. Dry Grinding / Sanding
2. Wet Grinding / Waterproof
3. Material Removal / Roughing (Coarse Grits)
4. Blending & Intermediate (Medium Grits)
5. Finishing / Deburring (Fine Grits)

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PHOTOS

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REFERENCES
1.H. Huanga, Z.M. Gonga, X.Q. Chena, L. Zhoub, “Robotic grinding and
polishing ”, Journal of Materials Processing Technology .
2. Yun Huang, Yun Zhao , and Xindong Zhang, Chongqing University,
Chongqing, P.R. China, “Experiment research on the abrasive belt grinding
titanium alloy blade of aviation engine”.
3. Huang Yun, Huang Zhi. Modern belt grinding technology and engineering
applications [M]. Chongqing: Chongqing university press.
4. Maintenance and Servicing Guidelines for Belt Grinders. (2022).
5. Patel, R., & Williams, T. (2017). Design and Development of a Compact Belt
Grinder for Precision Grinding Applications. Proceedings of the International
Conference on Mechanical Engineering.

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CONCLUSION
Belt grinders are used for grinding and shaping metal and wood parts. They have
a wide variety of applications, like knife making and wood working. Belt grinders
can be used for both coarse and fine grinding, and they can also be used for deburring
and polishing.
The project carried out by us made an impressing task in the field of hand crafts,
small scale industries and automobile maintenance shops. It is very useful for the
workers work in the lathe and small scale industries. The project has made in less cost
so that it can be available for everyone. Project has been designed to perform the
entire requirement task at the shortest time available. This machine has been mainly
developed for grinding the specimen to get a good surface finish and edge cuttings. In
this machine we have using the motor source of DC current operated device. This
equipment have good efficiency compared to other, so that good finishing is obtained.

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THANK YOU