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12 Types of Spanners and Their Uses [with Pictures] PDF

Spanners and It’s Types

Types of Spanners are used more than any other tool for tightening or loosening different jobs. These are generally made of drop forge steel or carbon steel. These are made in different shapes and sizes, according to requirements.

Apart from that, screwdrivers are also used to tightening and loosening to any given job or screw. In the workshops, usually, the following types of spanners are used.

Also, you can check out our guide on different types of hammers used in the workshop.

Types of Spanners

Following are the different types of spanners:

  1. Open-end or single-end spanner
  2. Double-ended spanner
  3. Ring spanner
  4. Socket spanner
  5. Box spanner
  6. Combination spanner
  7. Hook spanner
  8. Adjustable spanner
  9. “T” Socket spanner
  10. Magneto spanner
  11. Allen key
  12. Pin face adjustable spanner

Read Also: 13 Different Types of Threads [Complete Guide] with Images

1. Open End Spanner

Types of Spanners - Open End Spanner
Open End Spanner

In these types of spanners, only one end is open, in which the nut or bolt head is gripped to loose or tight. It is also known as a single end spanner. Their size is taken from the distance between their jaws. Thus the selection of a spanner is made according to the distance between the opposite sides of the nut or bolt.

2. Double End Spanner

Double end spanner

In these types of spanners, open ends are made at both ends to hold nuts or bolts heads in them. These two ends are made at angles of 15 to 30 degrees from the in-between body. These types of spanners are most widely used.

3. Ring Spanner

In these types of spanners, one or both ends are made of round rings to drip nuts and bolts, in order to tight or loose them. These rings are bent down in the opposite direction from each other.

Inside these rings, projected teeth are built with which six-sided nut bolts can be easily gripped. As it grips all the sides it does not slip. There are some ring spanners whose ends are not bent.

4. Socket Spanner

These types of spanners are in the form of a round socket. On one end of this spanner, a square hole is made. On the other end, grooves are cut outside in nut-bolt size, as in a ring spanner.

In the square hole, the Tommy bar is fixed whose shape is also square. These spanners are used where because of the paucity of space e ring spanners cannot be used. Besides this, socket spanners are also used where nut bolts are to be tightened by measuring them with a torque wrench.

These are available in small and big sizes in the form of sets. Tommy bar, Universal Tommy and Ratchet Tommy along with these spanners. With their help nut bolts of slanting, straight or congested space can be made tight or loose.

5. Box Spanner

Types of Spanners - Box Spanner
Box Spanner

These are made of thick or thin pipes. On one end or both, the ends of this spanner’s six sides are made, in which nut bolts with six phases are easily gripped. Holes are made across the rod on one or both ends in which a rod can be put and used as a handle. It is used in deeper spaces.

6. Combination Spanner

Types of Spanners - Double Ended Spanner

On one end of this spanner, an open-end spanner, and on the other end ring spanner is made. At both these ends, the spanners are of equal size.

7. Hook Spanner

Hook Spanner
Hook Spanner

These spanners are made for those nuts which do not have holes on their periphery. There are no faces on these nuts. Thus the pin of this spanner gets fixed in the hole and performs the function of revolving it for opening or tightening it.

8. Adjustable Spanner

Adjustable Spanner
Adjustable Spanner

These are special types of spanners, It is also known as screw wrench. Its jaws can be expanded or narrowed down to tight or loose the nut bolts. They are used for those nuts where no other spanner fits well.

9. “T “ Socket Spanner

“T “ Socket Spanner
“T “ Socket Spanner

These types of spanners are almost similar to the box spanner but it has a fixed hand on the top and in the bottom, a socket is built. These sockets are of different sizes. They are used in deep spaces.

10. Magneto Spanner

Magneto Spanner
Magneto Spanner

It is a bunch of small-sized single-end spanners. Spanners of different sizes are tied together for tightening or opening small nut bolts.

11. Allen Key

Allen Key
Allen Key

These are thin steel rods with six faces that are bent at 90° angles from one end.

They have a hole of six faces on the upper side. Such bolts perform the function of tightening while keeping the surface of the job equal. These are available in numbers and sets of different sizes.

12. Pin Face Adjustable Spanner

This type of spanner is made by joining two legs a rivet. At the end of its legs pin is fitted on each leg. It is used on round nuts having holes in the periphery to receive the spanner pin. The distance between its leg can be enlarged or narrowed down to use it on all types of nuts.

Size of the Spanner

All kinds of spanners are used to dismantle or tight nut or bolts of a specific size. All spanners are in units of mm and inches. Millimeter spanners are available in variation 7mm similarly inch spanners are available in 1/16 and double-ended and ring spanners are mostly in sets of 6, 8, 12, and 36. In a set of 6 spanners in inch spanners, the double-ended and ring spanners are available in the following sizes.

1 X 15/16 inch, 7/16 X 13/16 inch, 3/4 X 11/6 inch, 5/8 X 19/32 inch, 1/2 X 9/16 inch and 3/8 X 7/16 inch.

Similarly, millimeter spanners are in numbers. In double-ended and ring spanners on the one side one number is written and on the other one number is more than that is written. Socket spanners are available in different sizes.

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As you know Spanner is a tool used to provide mechanical grip and advantage in applying torque to turn nuts and bolts. So now, we hope that we have clear all your doubts about Spanner. If you have still any doubts about the “Types of Spanners” you can contact us or ask in the comments.

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About Saif M

Saif M. is a Mechanical Engineer by profession. He completed his engineering studies in 2014 and is currently working in a large firm as Mechanical Engineer. He is also an author and editor at www.theengineerspost.com

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