Shape Codes 2017-03-18T12:43:42+00:00

Shape Codes

BS 8666: 2005

00

A

11

A+(B)-0.5r-d

Neither A nor B shall be less than P in Table 2

12

A + (B) – 0.43R – 1.2d

Neither A nor B shall be less than P in Table 2 nor less than (R + 6d)

13

A + 0.57B + (C) – 1.6d

B shall not be less than 2(r + d). Neither A nor C shall be less than P in Table 2 nor less than (B/2 + 5d). See Note 3. Key: 1 – Semi-circular

14

A + (C) – 4d

Neither A nor (C) shall be less than P in Table 2. See note 1.

15

A + (C)

Neither A nor (C) shall be less than P in Table 2. See note 1.

21

A + B + (C) – r – 2d

Neither A nor (C) shall be less than P in Table 2

22

A + B + C + (D) – 1.5r – 3d

C shall not be less than 2(r + d). Neither A nor (D) shall be less than P in Table 2. Where used as a link, A shall not be less than P for links in Table 2 and (D) shall not be less than (C/2 + 5d.) Key: 1 – Semi-circular

23

A + B + (C) – r – 2d

Neither A nor (C) shall be less than P in Table 2

24

A+B+(C)

A and (C) are at 90° to one another

25

A + B + (E)

Neither A nor B shall be less than P in Table 2. If E is the critical dimension, schedule a 99 and specify A or B as the free dimension. See note 1

26

A + B + (C)

Neither A nor (C) shall be less than P in Table 2. See note 1.

27

A + B + (C) – 0.5r – d

Neither A nor (C) shall be less than P in Table 2. See note 1.

28

A + B + (C) – 0.5r – d

Neither A nor (C) shall be less than P in Table 2. See note 1.

29

A + B + (C) – r – 2d

Neither A nor (C) shall be less than P in Table 2. See note 1.

31

A + B + C + (D) – 1.5r – 3d

Neither A nor (D) shall be less than P in Table 2

32

A + B + C + (D) – 1.5r – 3d

Neither A nor (D) shall be less than P in Table 2. See note 1.

33

2A + 1.7B + 2C – 4d

A shall not be less than 12d + 30mm. B shall not be less than 2(r + d). (C) shall not be less than P in Table 2, nor less than (B/2 + 5d.) See Note 3. Key: 1 – Semi-circular

34

A + B + C + (E) – 0.5r – d

Neither A nor (E) shall be less than P in Table 2. See note 1

35

A + B + C + (E) – 0.5r – d

Neither A nor (E) shall be less than P in Table 2. See note 1

36

A + B + C + (D) – r – 2d

Neither A nor (D) shall be less than P in Table 2. See note 1

41

A + B + C + D + (E) – 2r – 4d

Neither A nor (E) shall be less than P in Table 2. May also be used for flag link

44

A + B + C + D + (E) – 2r – 4d

Neither A nor (E) shall be less than P in Table 2

46

A + 2B + C + (E)

Neither A nor (E) shall be less than P in Table 2. See note 1

47

2A + B + 2C +1.5r – 3d

(C) and (D) shall be equal and not more than A nor less than P in Table 2. Where (C) and (D) are to be minimized the following formula may be used: L = 2A + B + max (21d, 240)

51

2 (A + B + (C)) – 2.5r – 5d

(C) and (D) shall be equal and not more than A or B nor less than P for links in Table 2. Where (C) and (D) are to be minimized the following formula may be used: L = 2A + 2B + max (16d,160)

56

A + B + C + (D) + 2(E) – 2.5r – 5d

(E) & (F) shall be equal and not more than B or C, nor less than P in Table 2

63

2A + 3B + 2(C) – 3r – 6d

(C) and (D) shall be equal and not more than A or B nor less than P for links in Table 2. Where (C) and (D) are to be minimized the following formula may be used: L = 2 A + 3B + max(14d, 150)

64

A+B+C+2D+E+(F)-3r-6d

Neither A nor (F) shall be less than P in Table 2. See note 2

67

A

See Clause 10

75

p (A-d)+B

Where B is the overlap

77

Cp(A-d) + B

Cp(A-d) + B
Where B is greater than A/5 this equation no longer applies, in which case the following formula may be used:
L = C ((p(A-d))² + B²)1/2
C = Number of turns

98

A+2B+C+(D)-2r-4d

Isometric sketch.
Neither C nor (D) shall be less than P in Table 2

99

All other shapes where standard shapes cannot be used.

No other shape code number, form of designation or abbreviation shall be used in scheduling.

A dimensional sketch shall be drawn over the dimension columns A to E. Every dimension shall be specified and the dimension that is to allow for permissible deviations shall be indicated in parenthesis, otherwise the fabricator is free to choose which dimensions shall allow for tolerance.

To be calculated

See Note 2.