Tab washers

Tab washers are thin metal washers designed with two or more tabs which project from the external diameter. On assembly, a tab is bent against the component or

Lockwasher with external teeth (a) Flat form (b) Dished type

Lockwasher with external teeth (a) Flat form (b) Dished type

Dished-type washer with toothed periphery

Lockwasher with internal teeth

Lockwasher with internal teeth

Fig. 16.25 Types of locking washer

Single-coil washer

Fig. 16.25 Types of locking washer

Engineering Sketch Nut

Fig. 16.26

sometimes into a hole in the component. Other tabs are then bent up against the correctly tightened nut. Another pattern has a tab projecting from the inside diameter and this is intended to fit into a slot machined in the bolt, whilst the external tabs are again bent against the flat sides of the nut. The deformation of the tab washer is such that it is intended to be used only once.

Three different types of tab washer are shown in Fig. 16.27 together with, a typical assembly.

Engineering Drawing NutEngineering Sketch Nut

Fig. 16.27

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Responses

  • alcide
    How to draw a washer in engineering drawing?
    8 years ago
  • ulrich
    How to assemble a tab washer?
    8 years ago

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