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.
