LOCK NUTS (STATE STANDARD 8961-75 )

Figure 4.27 – Conventional drawings of lock nut
Table 4.13
| Nominal bore, Dy, mm | Thread G, inch | External diameter, mm | Internal diameter, mm | H, mm | D, mm | S, mm | Chamfer с, mm |
| 3/8 | 16.663 | 14.951 | 31,2 | ||||
| 1/2 | 20.956 | 18.532 | 36,9 | 1,5 | |||
| 3/4 | 26.442 | 24.119 | 41,6 | 1,5 | |||
| 33.25 | 30.292 | 53,1 | |||||
| 41.912 | 38.954 | 63,5 | |||||
| 47.805 | 44.847 | 69,3 | |||||
| 59.616 | 56.659 | 86,5 |
The example of the conventional denotation of a lock-nut with the nominal bore 20 mm: Lock-nut 20 State Standard 8961-75.
PIPE COUPLINGS (STATE STANDARD 8955-75)

Figure 4.28 – Conventional drawings of pipe coupling
Table 4.14
| Nominal bore, Dy, mm | Thread G, inch | L, mm | l , mm | D1, mm | D2, mm | B, mm | b1, mm | b2, mm | h, mm | Number of ribs | Chamfer с, mm |
| 3/8 | 3.5 | ||||||||||
| 1/2 | 1,5 | ||||||||||
| 3/4 | 10.5 | 32.5 | 2.5 | 2.5 | 1,5 | ||||||
| 39.5 | 2.5 | 2.5 | 4.5 | 2.5 | |||||||
| 2.5 | |||||||||||
| 68.5 | 3.5 | 3.5 |
Note. Sizes of external and internal diameters are resulted in table 4.12.
The example of the conventional denotation of a pipe coupling with the nominal bore 20 mm: Pipe Coupling 20 State Standard 8955-75.
REDUCERS OR REDUCING COUPLINGS (STATE STANDARD 8957-75)

Figure 4.29 – Conventional drawings of reducing coupling
Table 4.15
| Nominal bore, Dy, mm | Threads G1хG2, inch | L, mm | l , mm | l1, mm | l2, mm | D1, mm | D2, mm | D3, mm | D4, mm | b, mm | b1, mm | b2, mm | h, mm | Number of ribs |
| 20х10 | 3/4 х3/8 | 3.5 | ||||||||||||
| 20х15 | 3/4х1/2 | 3.5 | ||||||||||||
| 25х15 | 1 х 1/2 | |||||||||||||
| 32х15 | 1 х1/2 | 48.5 | 2.5 | 2.5 | ||||||||||
| 32х20 | 1 х3/4 | 48.5 | 32.5 | 2.5 | 2.5 | |||||||||
| 32х25 | 1 х 1 | 48.5 | 39.5 | 2.5 | 2.5 | |||||||||
| 40х20 | 1 х3/4 | 55.5 | 32.5 | 2.5 | 2.5 | 4.5 | 2.5 | |||||||
| 40х25 | 1 х 1 | 55.5 | 39.5 | 2.5 | 2.5 | 4.5 | 2.5 | |||||||
| 50х25 | 2х1 | 2.5 |
The example of the conventional denotation of a reducing coupling with the nominal bore 20 mm: Reducing Coupling 20 State Standard 8957-75.
Дата добавления: 2016-07-18; просмотров: 1629;











