JIS type bow shackle

JIS Type Bow Shackle is a bow-shaped shackle manufactured in accordance with Japanese industrial standards. The main body has a unique bow-shaped ring structure, which consists of an integrally forged bow ring, a pin shaft and an anti-slip device. The materials used are mostly carbon steel (usually hot-dip galvanized), 304 stainless steel and 316 stainless steel. The carbon steel model is suitable for general dry industrial environments; the 304 stainless steel model can cope with outdoor humid environments; and the 316 stainless steel model is for highly corrosive environments, such as marine operation scenes. Its specifications are divided according to the rated working load, ranging from 0.5 tons to 30 tons, and the safety factor is not less than 4.0. The bow-shaped structure design enables it to withstand loads within a certain angle range. It is widely used in lifting, shipbuilding, construction and other industries in Japan and surrounding areas to connect wire ropes, chains and various types of slings.

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Product Data

Stock no.	D (mm)	A (mm)	B (mm)	C (mm)	D1 (mm)	F (mm)
HS4010501	4	14	8	8	4	14
HS4010502	5	17.5	10	10	5	17.5
HS4010503	6	21	12	12	6	21
HS4010504	8	28	16	16	8	28
HS4010505	9	31.5	18	18	10	31.5
HS4010506	10	35	20	20	10	35
HS4010507	12	42	24	24	12	42
HS4010508	14	49	28	28	14	49
HS4010509	16	56	32	32	16	56
HS4010510	18	63	36	36	18	63
HS4010511	19	66.5	38	38	20	66.5
HS4010512	20	70	40	40	20	70
HS4010513	22	77	44	44	22	77
HS4010514	25	87.5	50	50	24	87.5
HS4010515	28	98	56	56	27	98
HS4010516	30	105	60	60	30	105
HS4010517	32	112	64	64	33	112
HS4010518	38	133	76	76	36	133

Product Details

JIS Type Bow Shackle Features

Bow-shaped structure, flexible force bearing: The carefully designed bow ring can bear lateral loads within the range of ±30° (the load-bearing capacity is the rated value when vertically stressed, and 80% of the rated value at 30°). Compared with the D-type shackle that can only bear vertical force, it is more suitable for connection scenarios with complex angles, such as the lifting of irregular objects.
One-piece forging, durable and fatigue-resistant: The bow ring and the pin shaft adopt an integrated forging process, with dense internal structure, no welding gaps, no defects such as pores and sand holes. After fatigue testing, it can withstand more than 80,000 cyclic loads (±1.1 times the rated load), and the service life is more than 3 times longer than that of the welded shackle, which is suitable for frequent use in working environments.
Stable anti-slip, easy to operate: The pin shaft is equipped with an anti-slip combination of "nut + cotter pin". Under conditions of frequent vibration (such as ship sailing), the probability of the pin shaft loosening is less than 0.5%. The pin end is designed with a hexagonal head for easy operation. It can be quickly loaded and unloaded using a standard wrench. A single operator can complete the installation within 1 minute, greatly improving work efficiency.
Details are meticulous and well protected: The inner side of the bow ring and the surface of the pin are finely polished (roughness Ra≤2.0μm), and the wear rate when in contact with the wire rope is 25% lower than that of ordinary shackles. The gap between the pin and the ring body is controlled at ≤0.3mm, and it is stable and shake-free after connection, effectively avoiding component wear caused by high-frequency vibration.

JIS Type Bow Shackle Applications

Construction field: On construction sites, it is used for tower cranes to lift construction materials, such as lifting steel bars and steel pipes. The 10-15 ton Japanese bow shackle is suitable for the inclined pulling operation of the lifting belt. Its multi-angle force characteristics can prevent the lifting equipment from twisting during the lifting process and ensure the safety of lifting. At the same time, when building scaffolding, it can be used to connect the scaffolding components with the lifting equipment. The quick loading and unloading function of the pin shaft facilitates the construction and dismantling of the scaffolding.
Shipping and water transportation industry: When loading and unloading cargoes on inland cargo ships, 5-10 ton shackles are used to connect the lifting equipment and cargoes. The bow ring allows the lifting belt to be inclined within a certain angle (≤30°) to meet the lifting needs of different cargoes. When short-distance container transshipment at the dock, it is used with the chain to fix the container. The convenient operation of the pin shaft can improve the cargo turnover efficiency and speed up the loading and unloading of ships.
Machinery manufacturing and maintenance scenarios: In machinery manufacturing factories, when transporting large machinery parts, Japanese bow shackles are used to connect the crane and the lifting lugs of the parts. Its reliable load-bearing capacity and flexible force angle can ensure the smooth and safe handling of parts. At the equipment maintenance site, for mechanical parts that need to be temporarily lifted, the quick installation and removal characteristics of the shackle can save maintenance time and improve maintenance efficiency.
Agriculture and fishery production: In agricultural production, large agricultural machinery such as combine harvesters are hoisted (for example, the replacement of the harvesting platform). The 5-ton JIS bow shackle can connect the lifting chain and the equipment lug plate, which is convenient and suitable for temporary maintenance operations in the field and other environments. In the fishing industry, when fishing boats are lifting nets or lifting catches, shackles can be used to connect lifting ropes and fishing nets or fishing boxes. Its corrosion-resistant material (such as stainless steel) can adapt to the humid and high-salt operating environment at sea.

FAQ

Q1: What is the difference between JIS type bow shackle and American type bow shackle?

A: JIS type bow shackle follows Japanese industrial standards and is relatively compact in size. For example, for the same 10-ton shackle, the overall volume of JIS type may be 10% - 15% smaller than that of American type. In terms of load-bearing capacity, the breaking load of American type shackle is usually 6 times the working load, while that of JIS type is 5 times. In addition, the surface treatment process of JIS type focuses more on adapting to the humid climate environment in Japan in terms of rust resistance, while American type focuses more on versatility. In terms of price, JIS type may be 15% - 20% lower than American type products of the same specification due to production standards and process characteristics.
Q3: Can JIS type bow shackle be used at an angle exceeding 30°?

A: Not recommended. When the use angle exceeds 30°, the actual load-bearing capacity of the shackle will be significantly reduced (only 60% of the rated value at 45°), which may cause the ring body to deform or the pin shaft to break. If it is really necessary to connect at a large angle, a special large-angle rotating shackle should be selected, or an adapter ring should be added to adjust the force direction. At the same time, the safety factor of the entire connection system should be ensured to be not less than 3.5.
Q3: What should I do if the pin nut is rusted and difficult to remove?

A: First, kerosene or a special rust remover can be used to soak the rusted part for 2-3 hours to soften the rust layer. Then, use a wrench and a hammer to gently tap the nut (pay attention to the tapping force to avoid deformation and damage to the ring body) to loosen the thread with the help of vibration. If the above method still cannot be removed, consider using gas cutting to remove the nut, but measures must be taken to protect the ring body during the operation to prevent it from being affected by high temperature. Finally, replace the pin shaft and nut with a new specification and material.
Q3: After use, the bow ring is found to be slightly deformed. Do I need to replace it?

A: If the deformation does not exceed 1.5% of the ring diameter (for example, if the ring diameter is 10mm, the deformation does not exceed 0.15mm), and no cracks appear, downgrading can be considered (reducing the load by 20%). However, if the deformation exceeds 1.5%, or there are local bulges or depressions, it indicates that the internal metal has undergone plastic deformation and the load-bearing capacity has dropped by more than 40%. At this time, it must be scrapped immediately and is strictly prohibited from continued use.

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Qingdao Haosail Machinery Co., Ltd.

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