How to make Double acting hacksaw using Scotch yoke mechanism Iinn this presentation i will tell you how to make double acting hacksaw machime by Images Supervisor Rajmumar Bairwa IIT Engineer

2. CONTENTS
• INTRODUCTION
• SCOTCH YOKE MECHANISM
• DESIGN OF MACHINE
• CALCULATE ROTATION OF MOTOR
• CONSTRUCTION
• STEP OF MAKING
• WORKING VIDEO
• COST PRICE
• FUTURE SCOPE

3. INTRODUCTION
Double acting power hacksaw cuts two
materials simultaneously by its scotch
yoke mechanism, so the production rate
increase twice then that of power
hacksaw.
Double acting power hacksaw works
under by the scotch yoke mechanism.
The scotch yoke mechanism converts the
rotary motion into the reciprocating
motion.

4. SCOTCH YOKE MECHANISM
The Scotch yoke (also known as slotted link mechanism) is a reciprocating
motion mechanism, converting the linear motion of a slider into rotational
motion, or vice versa. The piston or other reciprocating part is directly
coupled to a sliding yoke with a slot that engages a pin on the rotating part.

5. Design of Machine
Front View
Top View
Frame Dimension
Length =1.21m
Hight =0.91m
Breath =0.68m
Scotch Yoke Mechanism
Outer Square
Length =0.40m
Breath 0.07m
Inner Square
Length =0.35m
Breath =0.02m

6. Calculate Rotation of motor
Driven Pulley
Driver Pulley AC Motor
DATA:
Motor Speed = 1440 rpm.
Diameter of Driven Pulley = 0.348m.
Diameter of Driver Pulley = 0.03810m.
Calculate the speed of driven pulley:
Pulley Diameter ratio =1:8 (Driver pulley : driven pulley)
Driver pulley speed = motor speed * pulley D. ratio
= 1440rpm*1/8
= 180rpm

7. CONSTRUCTION
BASE FRAME
HACKSAW
SHAFT & HOLLOW
SECTION SHAFT
PULLEY
AC MOTOR
PIPE VICE
PLUMMER BLOCk
BELT
C CLAMP
Main Part Use In
Machine

8. Step of Making
1- Material Cutting 2- Base welding 3- Leg Welding 4- Our Base Ready
5- Plummer block & pulley 6- S.Y. Mechanism Setting 7- Motor fit 8- Hacksaw fit

9. 9- Vice Fit 10- C Clamp 11- Painting 12- Completed

11. COST PRICE
Sr. No. Name Specification Quantity Cost in
Rupees
1 AC Motor 1440 Rpm Single phase 0.5 HP 1 2000
2 Pulley 12 inch & 1.5 inch 2 750
3 Plummer Block 25 mm 4 1000
4 V-Belt B 82 1 250
5 Pipe Vice & C Clamp 1, 2 1000
6 Hacksaw 12 Inch 2 200
7 Frame, Shaft, Other 2000

12. FUTURE SCOPE
1- In the future we can use sensor for cooling
2- And also we can use sensor for stop motor after cute work piece
3- We can use Solar system for operate that machine
4- We can use gear for control speed that will help to cut fast work piece