In this presentation design and concept thinking of turnbuckle is described in effective manner.

1. GANDHINAGAR INSTITUTE OF
TECHNOLOGY
ACTIVE LEARNING ASIGNMENT
TOPIC- Turn Buckle
SUBJECT - Machine Design And Industrial Drafting (2141907)
BATCH- C-2 Mechanical
ENROLLMENT NO. - 150120119158
GUIDED BY-Prof. Vrajesh
Makwana

2. DEFINATION OF TURNBUCKLE
 Two round tie rods subjected to tensile
loading
 These rods are connected by coupling
 This is known as Turnbuckle

3. INSTRUCTIONS FOR USE
 Straight or in-line pulling only.
 It should be paid to prevent overloading.
1. Tensioning : the forces on the turnbuckle must not be such tha
any deformation occurs.
2. Deformation : The tension should be decreased immediately
and deformed parts should be replaced.
 The products are regularly inspected.
 Inspection should take place in accordance with the safety
standards given in the country of use like wear, misuse,
overloading etc. with a consequence of deformation and
alteration of the steel structure

4. DESIGN OF TURNBUCKLE

5. THEORY
 A turnbuckle, stretching screw or bottle screw is a device for
adjusting the tension or length of ropes, cables, tie rods, and
other tensioning systems.
 It normally consists of two threaded eye bolts,
1. With a left hand thread
2. With a right hand thread
 A metal coupling device consisting of an oblong piece internally
threaded at both ends into which the corresponding sections of
two threaded rods are screwed in order to form a unit that can
be adjusted for tension or length.

6.  Complete Turnbuckle

7. USE OF TURNBUCKLES
 This is used for Connecting Tie Rods Of stuctures
 This is used for Connecting links
 This is used for Connecting wire
 This is used for Connecting tension support of vertical
pole

8.  Diameter of roads:-
Tearing resistence of the threads of the
rod,
EQUATIONS:-
2
4 tcd 


• Length of the couple nut:-
   
2 2
4
d c cP d d n l 
     
 

9.  2 2
4
tP D d 

 
Outside diameter of couple nut:-
Outside diameter of the coupler:-
   
2 1
2 1
4
tP D D 
   
 

10. Thank You
