Spanners

Spanners are hand tools used for holding, tightening, or loosening nuts and bolts. They are available in different sizes according to the standard dimensions of nuts and bolts. Spanners are generally available in Metric (mm) and Imperial/Inch sizes.

1. Conventional Spanners

Conventional spanners are used for tightening or loosening nuts and bolts. They have an open jaw that fits around the sides of the nut or bolt head. Different sizes are available according to the size of the nut or bolt.

2. Ring Spanners

Ring spanners have a closed circular or polygonal head that completely surrounds the nut or bolt head. They provide a better grip than conventional open-ended spanners and reduce the possibility of slipping while applying force.

Ring spanners are available in different sizes according to standard Metric (mm) and Imperial (inch) dimensions.

3. Combination Spanners

A combination spanner consists of an open-ended spanner on one side and a ring spanner on the other side. Both ends are generally of the same standard size.

It provides the advantages of both conventional and ring spanners. The open end can be used where quick access is required, while the ring end provides better grip during tightening or loosening.

4. Adjustable Spanners

Adjustable spanners have a movable jaw that allows the opening size to be adjusted according to the size of the nut or bolt. They are useful when different sizes of fasteners need to be handled with a single tool.

5. Socket Spanners

Socket spanners consist of a socket that fits over the nut or bolt head. They are commonly used with a handle or ratchet mechanism and provide good grip and easy operation.

6. Ratchet Spanners

Ratchet spanners use a ratchet mechanism that allows the user to tighten or loosen a fastener without removing the tool after every turn. They are particularly useful in confined spaces and maintenance work.

Ratchet Spanners

7. Hook Spanners

Hook spanners have a curved hook-shaped end and are used for tightening or loosening specially designed nuts, such as round or slotted nuts. They are commonly used in machinery and mechanical assemblies.

Uses of Spanners

Spanners are commonly used for:

• Tightening nuts and bolts
• Loosening nuts and bolts
• Machine assembly and dismantling
• Automobile maintenance
• Mechanical workshop operations
• Repair and maintenance work
• Installation of mechanical components

Conclusion

Spanners are essential hand tools used in mechanical maintenance, assembly, and repair operations. Different types of spanners are selected according to the type, size, and accessibility of the nut or bolt. Proper selection of the spanner provides better grip, prevents damage to fasteners, and makes maintenance work safer and easier.