# 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.

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.

Fig. 14.20

Fig. 14.19

+2 -3

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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
• fethawit rezene
How to draw a tapering in machine 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?
3 years ago
• Carita
How to represent taper in drawing?
3 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?
2 years ago
• zufan
What is a taper in drafting?
2 years 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?
1 year ago
• Kevin
How to show a taper on a plan view drawing?
1 year ago
• Helmi
When to use flat tapers?
1 year ago
• cian
How to draw a 20 degree taper?
1 year ago
• habaccuc
How to find a taper on an engineering drawing?
11 months ago
• Brhane
How to annotate a TAPERED EDGE on a technical drawing?
11 months ago
How to call out conical taper on shaft ansi 14.5 drawing?
11 months ago
• dawit idris
How to properly show a tapered ID in a drawing?
9 months ago
• Alexa
How to technical draw a tapered hole?
9 months ago
• Otis
How to call out taper on engineering drawing?
8 months ago
• asmeret
How to designate taper on drawing?
8 months ago
• eduardo
Is the taper symbol used in machine drawings?
8 months ago
• ZULA NASIH
How to call out a taper for the ID of a cylinder on a drawing?
6 months ago
• Alice
How to call out a tapered hole in a drawing?
4 months ago
• Geneva
How to specify on a drawing a diametrial taper?
3 months ago