A tab washer is used for:

Question

Question

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RRB ALP Mechanic Diesel 21 Jan 2019 Official Paper (Shift 1)

Answer 1

Explanation:

Washers are of two main types:

Plain washers are inserted under screw heads or nuts to provide a suitable bearing area while tightening and to protect the component from damage.
Lock washers are used to prevent loosening due to vibrations, movements, or temperature variations.

Common types of lock washers include:

Tab washers:

Tab washers can be used for locking the nuts which are located near an edge or corner.
These are thin metal washers designed with two or more tabs that project from the external diameter.
On assembly, a tab is bent against the component or sometimes into a hole in the component.
Other tabs are then bent up against the correctly tightened nut.
The deformation of the tab washer is such that it is intended to be used only once.

F1 Krupalu Madhu 07.09.20 D1 F1 Krupalu Madhu 07.09.20 D2

Spring washer:

Spring washers are available with single or double coils.
These are placed under a nut in the assembly as washers.
The stiff resistance offered by the washer against the surface of the nuts serves to prevent loosening.