Tapers

In Fig. 14.18 the difference in magnitude between dimensions X and Y (whether diameters or widths) divided by the length between them defines a ratio known as a taper.

Taper Ratio Symbol

Fig. 14.17

Fig. 14.17

Included angle

Length

Fig. 14.18

For example, the conical taper in Fig. 14.19

0.25

and may be expressed as rate of taper 0.25:1 on diameter.

The ISO recommended symbol for taper is and this symbol can be shown on drawings accompanying the rate of taper, i.e. 0.25:1 The arrow indicates the direction of taper.

When a taper is required as a datum, it is enclosed in a box as follows:

3 the diameter or width at the smaller end;

4 the length of the tapered feature;

5 the diameter or width at a particular cross-section, which may lie within or outside the feature concerned;

6 the locating dimension from the datum to the cross-section referred to above.

Care must be taken to ensure that no more dimensions are quoted on the drawing than are necessary. If reference dimensions are given to improve communications, then they must be shown in brackets, e.g. (1:5 taper).

Figure 14.20 gives four examples of the methods used to specify the size, form, and position of tapered features.

Taper Symbol Drawing
Fig. 14.20

Fig. 14.19

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Responses

  • Ambessa
    What is a Conical Taper in engineering drawing?
    9 years ago
  • CRESCENZO
    How to define taper for drawings?
    9 years ago
  • saare semere
    How to calculate the taper in engineering drawing?
    3 years ago
  • AARON
    How taper is mentioned in drawing?
    3 years ago
  • marko
    What is tapering in engineering?
    3 years ago
  • taija rannikko
    What does it means when taper is mentioned on drawings?
    2 years ago
  • Carita
    How to represent taper in drawing?
    2 years ago
  • josefiina
    How the tappered holes are represented in drawing?
    2 years ago
  • Jean
    How to calculate tapre angel with drawing?
    2 years ago
  • hamza
    What is 1:20 taper means in engineering drawing?
    2 years ago
  • harry
    What is taper section in engineering drawing?
    1 year ago
  • zufan
    What is a taper in drafting?
    1 year ago
  • GUIDO TREVISANO
    How to give a taper in drawing?
    1 year ago
  • mario
    How to symbol a taper featire on a drawing?
    1 year ago
  • Arcangelo
    How to detail a taper?
    10 months ago
  • Kevin
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    10 months ago
  • Helmi
    When to use flat tapers?
    10 months ago
  • cian
    How to draw a 20 degree taper?
    9 months ago
  • habaccuc
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    8 months ago
  • Brhane
    How to annotate a TAPERED EDGE on a technical drawing?
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    How to call out conical taper on shaft ansi 14.5 drawing?
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    6 months ago
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    6 months ago
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    5 months ago
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    5 months ago
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    12 days ago

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