What is Foundation Bolt

 What is Foundation Bolt

1- Machines are generally subjected to vibration or forces. Due to this the machines are likely to shift or move from their positions. 

2- To overcome this, the machines are fixed to the ground with the help of devices called foundation bolts. 

3- These foundation bolts do not have a specific shape or head like hexagonal or square bolts.

4- The length of the shank is according to the thickness of nut and the thickness of machine base. 

5-  This odd shaped part holds the machine firmly to the ground.


Types of foundation bolt 


1- Eye foundation bolt .

2- Lewis foundation bolt .

3- Cotter foundation bolt.

4- Rag foundation bolt.


1- Eye foundation bolt 


1- Simple forms of these bolts can be quickly forged from mild-steel. The stationary engines and machines are fixed on these bolts. These bolts are suspended in the hole and cement grout is then poured to fill the space around them.

1- Eye foundation bolt


2- Lewis foundation bolt 


1- It is a rectangular shank bolt with one side taper. 

2- A gib head key is placed on the other side of taper and concrete is put around. 

3- The foundation bolt can be easily withdrawn by removing the gib head key first and then the bolt.


3- Cotter foundation bolt 

1- It has a rectangular slot through which a double headed cotter is placed. 

2- A cast iron washer rests above the cotter. 

3- Through a hand hole, connecting the cavity in the concrete the bolt is pulled down and lifting the cotter, the cotter is placed in position.

3- Cotter foundation bolt

 

4- Rag Foundation Bolt


1- This unique foundation bolt has a tapered body which comes with grooves on all sides of its body and a square or rectangular cross-section. 

2- Similar to the bent foundation bolt, it is mandatory to first allow the rag bolts to set in lead before allowing the whole assembly to set in concrete.



4- Rag Foundation Bolt

Comments

Post a Comment

Popular posts from this blog

BEARING INTRODUCTION-TYPES-BEARING MATERIAL AND BEARING IMAGE-FITTER ONLINE NOTE.

Image
INTRODUCTION :- 1- To keep the long shaft or moving parts of the machines in proper position by the supporting devices are called bearing. 2- Bearings form part of an assembly or mechanism which supports or constrains another part in the assembly. A bearing material should have the following properties:  a)- Offer the least possible resistance to motion. b)- Have good wear resistance. c)- Be able to absorb sudden loads. d)- Be able to conduct heat away from the bearing surface . e)- Resist corrosive conditions . f)- It should consume less energy on moving at high speed. Bearing Metal:- i)- For low speed and heavy lode - Cast iron. ii)- For high speed and Heavy lode - Bronze. iii)- Shell Bearing - White metal or Babita metal. iv)- In addition to that Cadmium Steel, Chromium Steel,Copper,Aluminium and Silver and alloy steel bearing are also made. Bearings are used:- i)- support and hold the shaft in a fixed position. ii)- allow the shaft to run freely. iii)- restrain moving elements....
Read more

JIG AND FIXTURE TOOL - USE AND CONSTRUCTION KNOWLEDGE - FITTER ONLINE NOTE

Image
 Jigs  1- In metal working a jig is a type of tool used to control the location and motion of another tool. 2- A jigs primary purpose is to provide repeatability , accuracy and interchangeability in manufacturing products .  3- A jig is often confused with a fixture holds the work in a fixed location  4- A device that does both functions ( holding the work and guiding a tool ) is called a jig .  5- Jigs or templates have been known long before the industrial age .  6- There are many types of jigs and each one is custom - tailored to do a specific job .  7- Many jigs are created because there is a necessity to do so by the tradesmen .  8-  To increase productivity , to do repetitious activities and to do a job more precisely . 9- Faster rate of production . Easy to perform the operations even by unskilled workers .  10-  Layout and marking on individual parts eliminated . DRILL JIGS 1- A drill jig is a type of jig that expedites...
Read more

WHAT IS FILE ?https://anilitistudy.blogspot.com

Image
INTRODUCTION 1)- The three methods of metal cutting are abrasion,fusion and incision . i)- Abrasion:- In this method metal is cut in particles as filing,grinding etc. ii)- Fusion:- Cut any metal in middle by melting is called fusion method as welding are or gas cutting etc. iii)- Incision:- Cut any metal in thick chips convert in any shape as milling,shapes slot or work in lathe machine. 2)- Filling is a method for removing excess material from a work piece. 3)- Files are available in many shapes and sizes. 4)- Files are specified according to their length, grade, cut and shape .  Parts of a file:-   Tip or Point: -   the end opposite to tang.  Face or side: - The broad part of the file with teeth cut on its surface.  Edge:- The thin part of the file with a single row of parallel teeth. Heel:- The portion of the broad part without teeth.  Shoulder:- the curved part of the file separating.  tang: - from the body Tang The narrow and thin part of ...
Read more