Korean Type Turnbuckle with Eye & Eye is a ring-ring tension adjustment device under the Korean standard system. It consists of a left-handed threaded rod, a right-handed threaded rod, an intermediate adjustment sleeve, and an annular connector (Eye) at both ends. The threaded rod is retracted and extended by rotating the sleeve to adjust the tension of the rope or cable. The annular connector is connected to the external component through a pin and has strong adaptability. The material is mainly carbon steel (electroplated galvanized/hot-dip galvanized) and 304 stainless steel. The carbon steel model is suitable for dry industrial scenes, and the 304 stainless steel is resistant to moisture and mild corrosion and is suitable for outdoor environments. It is widely used in scenes such as construction, ships, and agricultural machinery in Korea and Southeast Asia that require stable connection and tension adjustment.
Stock no. | Size(in) | L(mm) | L1(mm) | F(mm) |
HS4020701 | 1/4 | 156 | 100 | 12 |
HS4020702 | 5/16 | 180 | 110 | 14 |
HS4020703 | 3/8 | 236 | 156 | 16 |
HS4020704 | 1/2 | 270 | 170 | 20 |
HS4020705 | 5/8 | 346 | 217 | 22 |
HS4020706 | 3/4 | 400 | 245 | 26 |
Korean standard adaptability: following Korean industrial general standards, the thread accuracy and dimensional tolerance are precisely matched with Korean local connectors (such as KS standard lifting rings and ear plates), and can be assembled without conversion. It has better compatibility than European and American models in Korean equipment import projects.
Compact structure and space saving: The sleeve length is 15%-20% shorter than the European ring-ring type (such as M16 specification is about 120mm vs European 140mm), and the thickness of the ring joint is thinned by 10% but the strength is maintained, which is suitable for installation scenarios with narrow space (such as agricultural machinery and small equipment).
Outstanding cost performance: The price of carbon steel hot-dip galvanized model is 10%-15% lower than that of the same specification Japanese ring-ring type, and 20%-30% lower than that of American type. The cost is reduced by optimizing the production process. At the same time, the corrosion resistance of 304 stainless steel model meets the needs of ordinary outdoor use for more than 5 years, taking into account both economy and practicality.
Smooth adjustment and easy operation: The sleeve surface is knurled, and the friction is 30% greater than that of the smooth sleeve. It can be easily rotated by hand or with a wrench; the clearance between the threaded rod and the sleeve thread is controlled at 0.08-0.12mm, and there is no jamming during adjustment, which is suitable for frequent fine-tuning scenarios (such as billboard support ropes).
Construction and decoration engineering: tension adjustment of light steel structures in Korean buildings, suspension system of indoor ceiling keels (connected with embedded pins through ring joints), and fine-tuning of supporting steel cables for glass partitions. 304 stainless steel models are suitable for wet bathrooms, balconies and other scenes.
Agricultural and horticultural machinery: tensioning device for Korean greenhouse frames, ring joints and greenhouse steel pipe ear plates are firmly connected, and the adjustment sleeve can quickly balance the tension in different areas; transmission system auxiliary tension adjustment for small harvesters and rice transplanters, and compact structure adapts to the limited space inside the machinery.
Ships and fishing equipment: mooring rope tension control for small offshore fishing boats in South Korea, carbon steel hot-dip galvanized models are rust-proof and durable in freshwater and light seawater environments; frame tensioning of aquaculture cages is fixed, and ring joints are resistant to seawater corrosion (short-term use) to avoid deformation of cages.
Logistics and small lifting: Cargo tie rope adjustment for Korean trucks (with ring joints and fixed lugs) to ensure that cargo does not loosen during transportation; auxiliary steel cable tension balance for small warehouse cranes, adapted to M12-M20 specifications, meeting 1-5 ton load requirements.
Outdoor facility maintenance: Adjustment of the inclined support rope for Korean street signs and street light poles, the ring joint is connected to the ground anchor pin, and the force is evenly distributed during wind load resistance; tension control of park fences and guardrails, 304 stainless steel models resist rain corrosion and reduce maintenance frequency.
Q1: What is the difference between the applicable scenarios of ring-ring type and hook-ring type Korean turnbuckle screws?
A: The ring-ring type needs to be used with a pin shaft, which is suitable for static, long-term load-bearing scenarios (such as building fixation), with high load and stability; the hook-ring type does not require a pin shaft, is faster to install, and is suitable for temporary or frequent disassembly scenarios (such as cargo bundling), but has a low load capacity and is prone to deformation and loosening due to long-term use.
Q3: When used in coastal areas, how to choose between carbon steel galvanized and 304 stainless steel?
A: The salt content in coastal areas is high, and the carbon steel galvanized type will rust in 3-6 months, requiring monthly maintenance (re-applying anti-rust paint); the 304 stainless steel type can withstand 1-2 years of salt spray corrosion. It is recommended to replace or upgrade to a 316 stainless steel customized type (special order required) for more than 3 years, and the choice should be based on maintenance frequency and cost.
Q3: What are the consequences of forced rotation if the sleeve and threaded rod are stuck during adjustment?
A: The jam is mostly caused by sand or rust in the thread. Forced rotation will cause thread slippage (threaded rod or sleeve thread damage), load capacity will drop by more than 50%, and even the welding point between the ring joint and the rod body will break. Correct treatment: Soak in kerosene for 1-2 hours, clean up the debris and apply grease, and slowly rotate forward and reverse to release the jam.
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