This document summarizes a student project to design and build an electric lawn mower. It includes sections on the idea, design, parts, specifications, expenses, applications, advantages and disadvantages of an electric lawn mower. The design uses a 36 volt motor powered by rechargeable batteries to drive the cutting blades. The main parts are the blades, frame, wheels, handle, and battery pack. The estimated total cost is 3,350 rupees. Electric mowers have less pollution and noise than gas mowers but higher initial costs and need recharging. The mower is intended for small residential lawns and gardens.

1. MAHAKAL INSTITUTE OF TECHNOLOGY &
MANAGEMENT, UJJAIN
A Minor Project Presentation on
FABRICATION OF LAWN MOWER
Session 2014-2015
Guided by :- Submitted by :-
Mr. Ankur Dave
Asst. Professor
Ashwani Dixit
Karan Singh Rathore
(7th sem. M.E.- I)

2. CONTENTS
• Introduction .
• Our Idea about Lawn Mower .
• Design Of Lawn Mower .
• Parts Of Lawn Mower .
• Specifications .
• Expenses .
• Applications .
• Advantage & Disadvantage .
• Conclusion .
• References .

3. Introduction
A lawn mower is a machine that
uses one or more revolving blades to cut
a lawn to an even height. The blades may be
powered either by hand pushing the mower
forward to operate the mechanical blade(s),
or may have an electric motor or an internal
combustion engine to spin their blades.
Some mowers also include other abilities,
like mulching or collecting their clippings.

4. Our Idea about Lawn Mower
An electrical Lawn Mower is more suitable & easy to use than the
lawn mower with an engine, so we are making an electrical lawn mower with
an electric motor, which is providing the high speed rotation to the blades.
Cordless electric mowers are powered by a 12-volt rechargeable batteries.
Typically, more batteries mean more run time and/or power. Batteries
can be in the interior of the lawn mower or on the outside. If on the outside,
the depleted batteries can be quickly swapped with recharged batteries.
Cordless mowers have the maneuverability of a gasoline powered mower and
the environmental friendliness of a corded electric mower.

5. Design Of Lawn Mower
The design of an electrical lawn mower contents a blades, bed knife, body
frame, wheels, push handle, bag, & motor . The power system there are many
Options, but we are using rechargeable battery powered motor, which is attached
to the cutting blades. Sizing the battery will depend on what we are powering,
specifically the motors. Like batteries, there is a range of motors to choose from.
We went with 36 volt motor with integrated gear heads.
Cutter deck housing — This houses the blade and the drive system of the
mower. It is shaped to effectively eject the grass clippings from the mower.
Blade mounting and drive system — The blade of a rotary mower is usually
mounted directly to the motor shaft.
Mower blade — A rotary mower generally has two blades that rotates
horizontally. The blade features edges that slightly curved up to generate a
continuous air flow as the blade rotates, thus creating a sucking and tearing
action.

6. Picture :-

7. Parts of Lawn Mower :-
• The main parts of a cylinder or reel mower are:-
• Blade - Consist of numerous (2 to 3) blades that are attached to a rotating shaft. The blades rotate,
creating a cutting motion.
• Bed knife - Is the stationary cutting mechanism of a mower.
• Body frame - The main structural frame of the mower onto which the other parts of the mower are
mounted.
• Wheels - These help propel the mower in action. Generally, our lawn mowers have four wheels.
• Push handle - The "power source" of a manually operated mower. This is a sturdy T-shape handle
that is connected to the frame, wheels and blade chamber.
• Motor - The power source of a lawn mower that is powered by Battery & We are using small DC
motor .
• Bag – The bag is carried catted grass clippings.

8. Specifications :-
• Voltage (volts) 12 Assembled Depth (in.) 61 in
• Assembled Height (in.) 41.5 in • Assembled Width (in.) 21.5 in
• Blade Length (In.) 13 in • Features
Bagger , push handle , Four wheels , Tool-free
adjustments
• Charge time (hours) 12 • Cordless Yes
• Cutting Options Bag, Mulch • Cutting Width 13 in
• Fuel Type Rechargeable Battery • Included Bag Kit, Batteries
• Lawn Mower Type Walk Behind • Manual Push Mower Type Electric
• Cutting height (in.) 2.5 • Mower Deck Width 20 in
• Mulching Capability Yes
• Number of adjustable handlebar
positions
2
• Product Weight (lb.) 90 lb. • Rear wheel size (in.) 9
• Run time (min.)
45 min./Fully Charged
Battery
• Size of Yard 1/4 - 1/2 Acre
• Start Type Electric • Walk Behind Mower Type Manual Push

9. Expenses :-
Cost of each Parts :-
Parts Price (Approx.) In ₹
Motor - ₹ 300
Blades - ₹ 200
Body Frame - ₹ 900
Wheels - ₹ 400
Battery - ₹ 900
Plywood - ₹ 150
Miscellaneous - ₹ 500
TOTEL -- ₹ 3350

10. Applications :-
• There are several types of mowers, each suited to a
particular scale and purpose.
• The smaller types are pushed by human user and
are suitable for small residential lawns and
gardens.
• Lawn mowers are widely used in all sports
grounds. Lawn mowers become a more efficient
alternative to the domesticated grazing animals.
• It is widely used to cut small grasses & it can also
be used for cutting small plants and also used for
trimming grass of play grounds and sports ground.

11. Advantage & Disadvantage:-
Advantages :-
• It is easy to use , because it is cordless.
• With Battery powered Lawn mowers, there is no more messy oil & smelly gasoline.
• Now we are safety with no pollutants emitted. There are also no air filters & spark plugs to bother it.
• The cost of electricity to recharge the battery is minimal compared to the high cost of gasoline, oil, air filters,
& sparkplugs.
Disadvantages :-
• It is costly. An electric mower is more expensive.
• The eventual disposal of worn-out batteries is problematic , & the motors in cordless mower tend to be less
powerful than gasoline motors of the same total weight (including batteries) .
• Recharging of lawn mower batteries can take from 8 to 16 hours with only an hour of operation. We need to
replace the batteries after so many hours of operation.
• As a result of incorrect use, fluid can leak from the rechargeable battery. Avoid contact with the fluid.

12. Conclusion :-
A lawn mower which is simply called a grass cutter machine
become very popular today and it very commonly used for furnishing
soft grasses. Now it is necessary for cleaning gardens. Since it is easily
operating machine so now it is used for various applications.

13. Reference :-
• www.wikipedia.com/electrical lawn mower .
• Kinnander, Ola (2012). "Rise of the Lawn-Cutting Machines". Bloomberg
Businessweek.
• Peoplepoweredmachines.com
THANK YOU !!!