CB* 3061-1987 Alloy Steel Shackle CB*3061-1987 Standard download decompression password: www.bzxz.net

National Ship Standardization Technical Committee Professional Standard CB* 3061—87
Alloy Steel Shackle
Published on February 1, 1987
Implemented on December 1, 1987
Approved by the National Ship Standardization Technical Committee Free Standard Network (www.freebz.net) No registration is required to download the National Ship Standardization Technical Committee Professional Standard Alloy Steel Shackle
The shackles specified in this standard are mainly used for ship cargo handling equipment. 1 Type and size
The type of alloy steel shackle is in accordance with Table 1.
Straight shackle
Round shackle
National Ship Standardization Technical Committee 1987-02-01 issued allowable load, kN (tf)
491225
(5~125)
49~1225
(5~125)
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Classification number: U24
Replace CB*3061-79
1987-12-01 implementation
CB*3061-87
1.2The dimensions of D-type alloy steel shackles are as shown in Figure 1 and Table 2. B
a nut; 4 a cotter pin
1 a body,
a cross pin;
D12·5
allowable load
kN(tf)
49（5）
78（8）
98（10)
123（12.5）
196（
314（32
392 (
784 (80)
980 (100)
1225 (125)
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Split pin
GB91--76
8 ×45
10×60
10×70
10×80
10×90
10×100
10×120
10×140
CB*3061-87
1.3 The dimensions of alloy steel shackles are as shown in Figure 2 and Table 3. Figure 2
1-body; 2-cross pin;
3-nut, 4-split pin
Allowable load
kN(tf)
49(5)
98 (10)
123(12.5)Www.bzxZ.net
157(16)
196(20)
245(25)
314(32)
392(40)||t t||4.90(50)
617(63)
784(80)
980(100)
1225(125)
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Split pin
GB91-76
10×60
10×70
10×80
10×90
10×100
10×120
10×120
10×140
Marking example
CB* 306187
Straight alloy steel shackle with an allowable load of 157kN (16tf): shackle D16CB*3061-87
Round alloy steel shackle with an allowable load of 157kN (16tf): shackle C16CB*3061-87
3 Technical requirements
3.1 The materials of alloy steel shackle parts are in accordance with Table 4. Part name
Body, cross pin
Split pin| |tt||Name and brand
Alloy steel 40Cr
Ordinary carbon steel A3
Ordinary carbon steel B2F
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Standard number
YB6-71
GB700---79
GB70079
Note: The materials in Table 4 can be replaced by equivalent materials. 3.2 The shackle body should be forged as a whole, the cross pin should be forged or machined from round steel, and the cross pin hole on the shackle body should be drilled on the solid, or can be hot-punched to about 2/3 of the hole diameter, and then drilled or bored to the specified hole diameter. 3.3 The surface of the shackle parts shall not have spots, cracks or interlayers. 3.4
After heat treatment, the shackle body and cross pin have a hardness stress of HB240~260. The allowable deviation of the shackle body size is in accordance with Table 5, and the allowable deviation of the cross pin diameter is in accordance with Table 6. Table 5
Body size
50~120
40~100
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Cross pin diameter D
40~100
Inspection rules and test methods
Requirements.
CB*3061--87
Continued Table 5
100~200
>120~200
>200~300
>300~400
Free Standard Network (www.freebz.net) Standard mm
The materials used to make the shackle body and cross pin must have a material certificate. The forging test grade is CB773-70. The II-level shackle should be inspected and accepted by the manufacturing and technical inspection department, and a certificate of conformity should be issued. 4.2
4.3 Each shackle should be tested for verification according to the test load listed in Table 7. The test duration should be no less than 5 minutes. After the test, the cross pin of the shackle should be able to be pulled out and inserted freely, and the parts should not have permanent deformation. 5
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Marking and custody
kN (tf)
245 (25) and below
314 (32)
392 (40)
490 (50)
617 (63)
784 (80)
980 (100)
1225 (125)
CB*3061-87
kN (t f)
2×permissible load
670(68.4)
(141.8）
(172.4）
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5.1After each shackle passes the test, the model, standard number and manufacturer's name or factory mark shall be marked at the specified mark (see Figure 3).
For example: D16
6CB*3061-87
Properly package and store to prevent rust and damage. After the shackle is tested and accepted, it shall be coated with anti-rust oil. Additional instructions:
This standard was proposed by the Marine Equipment Group and is under the jurisdiction of Jiangnan Shipyard. This standard was drafted by the 708 Institute of China State Shipbuilding Corporation. The main drafters of this standard are Dai Xingliang and Yu Weicheng. Free Standards Network (www.freebz.net) can download comprehensive
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