Woodruff keys

A Woodruff key, Fig. 17.11, is a segment of a circular disc and fits into a circular recess in the shaft which is machined by a Woodruff keyway cutter. The shaft may be parallel or tapered, Figs 17.12 and 17.13 showing the method of dimensioning shafts for Woodruff keys where the depth of the recess from the outside of the shaft is given, in addition to the diameter of the recess. A Woodruff key has the advantage that it will turn itself in its circular recess to accommodate any taper in the mating hub on assembly; for this reason it cannot be used as a feather key, since it would jam. Woodruff keys are commonly used in machine tools and, for example, between the flywheel and the crankshaft of a small internal-combustion engine where the drive depends largely on the fit between the shaft and the conically bored flywheel hub. The deep recess for a

Woodruff Key Iti

Fig. 17.11 Woodruff key

Woodruff Key Engineering

Fig. 17.11 Woodruff key

Fig. 17.12 Dimensions required for a Woodruff key in a parallel shaft

Fig. 17.12 Dimensions required for a Woodruff key in a parallel shaft

Engineering Drawing Taper Keys

Fig. 17.13 Dimensions required for a Woodruff key in a tapered shaft

Round key

Hollow saddle key

Flat saddle key

Fig. 17.13 Dimensions required for a Woodruff key in a tapered shaft

Round key

Flat saddle key

Hollow saddle key

Flat Saddle Key

Fig. 17.14

Woodruff key weakens the shaft, but there is little tendency for the key to turn over when in use.

Where lighter loads are transmitted and the cost of cutting a keyway is not justified, round keys and flat or hollow saddle keys as shown in Fig. 17.14 can be used.

Saddle keys are essentially for light duty only, overloading tending to make them rock and work loose on the shaft. Both flat and hollow saddle keys may have a taper of 1 in 100 on the face in contact with the hub. The round key may either be tapered or, on assembly, the end of the shaft and hub may be tapped after drilling and a special threaded key be screwed in to secure the components.

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Responses

  • thorsten
    Where is a woodruff key used?
    9 years ago
  • Danyl Alexander
    How deep to machine a woodruff key way?
    9 years ago
  • Lalia
    How can i construct a woodruff keys for shaft?
    9 years ago
  • ensio kemppi
    How to draw Woodruff keys?
    8 years ago
  • melissa
    How to make an engineering drawing taper?
    8 years ago
  • julia
    How to draw woodruff keyway using autocad?
    8 years ago
  • patrick
    How to draw wood ruff key in isometric projection?
    3 years ago
  • ines
    How to draw an isometric shaft and keys?
    3 years ago
  • Ayden Boyle
    What is the benifit of woodroof key over parralle key?
    2 years ago
  • poppy
    How to sketch a woodruff key?
    2 years ago
  • tullia costa
    What is woodruff key with advantages and disadvantages?
    2 years ago
  • hyiab
    How to make a woodruff key?
    2 years ago
  • candace jones
    How to woodruff key drowing?
    2 years ago
  • luke
    WHAT IS WOODDRIFT KEY?
    2 years ago
  • jasmin
    What is a key in engime draawing?
    2 years ago
  • gabriel futsum
    Which keys are medium, light and heavy in engineering drawing?
    2 years ago
  • kaj
    Who makes woodruff keys?
    1 year ago
  • benigna
    How to secure a woodruff key?
    4 months ago
  • Osman
    How to make a tapered woodruff key?
    20 days ago

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