RR-C-271 Chains And Attachments, Carbon And Alloy SteelThis specification covers carbon and alloy steel chain of commercial quality together with the attachments most commonly used with this chain.

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RR-C-271F

FIGURE 13. Type II, class 10, weldless register chain.

3.3.2.11 Class 11, mechanical communication chain. The mechanical communication chain shall be similar to figure 14 and shall be in accordance with the requirements as shown in table V.

FIGURE 14. Type II, class 11, weldless mechanical communication chain. TABLE V. Type II, class 11, weldless mechanical communication chain.

Nominal thickness outside links (inch)

Nominal thickness inside links (inch)

Width (max) (inch)

Pitch (center-to-center) of pins

(approx)

Number of links per foot (approx)

Breaking load (min) (pounds)

1/16

1/8

0.25

0.375

800

3.3.2.11.1 End links. Each end of the completed chain shall be fitted with a large brass link for the attachment of transmission wires.

3.3.2.11.2 Length. The total length of the finished chain shall be approximately 30 inches.

3.4 Detail requirements - attachments.

3.4.1 Type II, connecting links. Connecting links shall be forged from carbon steel as specified in 3.1.1.2.3, shall be similar to figure 15, and shall be in accordance with the dimensions and physical requirements as shown in table VI. The 3/16, 1/4, and 5/16-inch sizes shall have rivets only, no interlocking lugs.