Retractable Ratchet Strap for Cargo and Motorcycle Tying – 1 to 5 Tons

Detailed Guide on WSTDA Tubular Worm Gears

The 1 to 5 ton retractable ratchet strap is the solution for securing loads and motorcycles. Available in 3 meters, 9 meters, and with hooks, our ratchet straps for trucks and winches combine strength and ease of use.

The tubular cover design ensures the perfect encapsulation of the round sling, providing additional protection to the polyester core against damage caused by cuts, abrasion, and UV degradation. In the United States hqlifting, we offer a complete line of endless round slings that meet ASME, ANSI B30.9, and WSTDA standards with a standard safety factor of 7:1. Safety factors of 6:1 or 5:1 are available upon request. (Note: Slings with a 5:1 safety factor, commonly called disposable lifting slings, are used for unloading loads. These slings are designed for single use and must be destroyed after use.)

The endless round slings are color-coded to indicate the safe working load limit, as specified in the product specifications.

Manufacturing Process of Endless Polyester Round Slings

As one of the leading manufacturers of round lingas in China, the hqlifting focuses on endless round slings designed for heavy-duty applications. These slings are made with high-tenacity polyester yarns that are continuously braided to provide maximum strength with minimal weight. It is important to note that the core of polyester yarns is not woven into a tape and then inserted into a woven tube.

Our round sling protectors are also made of high-tenacity polyester yarns and produced using weaving machines from Kyang Hye and Swiss Jakob Müller AG. The dyeing machines ensure two crucial processes – heating and cooling – to increase the durability and color coding of the endless polyester round slings according to safe working load limits. The final production step is sewing, which is essential to ensure the strength and durability of the sling.

Main Equipment:

• Quality raw materials (polyester, nylon, etc.)
• Urdideira
• Tear
• Sewing machine
• Dyeing machine
• Máquina de costura de etiquetas de segurança
• Load resistance testing machine
• Film packaging machine

Production Process of Round Polyester Slings

1. Matéria-prima: High tenacity polyester
2. Wire Selection
3. Raw material weaving
4. Weaving
5. Dyeing
6. Measurement and Cutting
7. Seam stitching and edge finishing (for accessory application)
8. Security information stitching on synthetic fiber yarn
9. Teste e inspeção
10. Film packaging
11. Warehouse
12. Transporte

Synthetic fiber slings can be configured as webbing slings with eyes, but synthetic round slings are mainly supplied in endless loop form. They are color-coded to distinguish different load capacities. EN 1492-2 and AS 4497 are among the most widely used endless webbing sling standards.

Inspection Process

We adopt strict quality control measures, including:

• Teste de matéria-prima
• Teste de limite de carga de trabalho e resistência à ruptura
• Inspeção de superfície
• Final inspection

Aplicações de Lingas Redondas

As lingas redondas são versáteis e oferecem métodos de amarração ilimitados, uma forte aderência à carga e facilidade de manuseio e armazenamento. Seus benefícios incluem:

• Aperto mais firme com liberação mais fácil da carga
• Risco reduzido de lesões nas costas e nas mãos
• Redução do peso total da amarração, resultando em economia de custos
• Design mais forte, durável e flexível, ideal para cargas mais leves
• Ideal para elevações aéreas e cargas delicadas

Round slings offer advantages over flat webbing slings, as the protectors can shield them from potential damage caused by cuts, tears, abrasion, heat, and UV degradation. Regular inspection is essential to maintain the safety and integrity of the sling. Here are some important guidelines to follow:

Diretrizes de Segurança:

1. Never exceed the rated capacity.
2. Avoid dragging the sling on the ground or on abrasive surfaces.
3. Do not twist, shorten, lengthen, or tie knots in the sling.
4. Do not remove the sling from under a load that is resting on it.
5. Never try to repair a damaged strap.
6. Store the lingas in a safe and chemically inactive area, away from ultraviolet light and heat.
7. Always protect the slings from sharp edges, corners, or abrasive surfaces.
8. Inspect the slings completely before each use.

Sling Use and Specifications Guide

1. Inspection: Make sure the selected sling is suitable for the current load.
2. Load Balance: Ensure the load is properly balanced before lifting or transporting.
3. Temperature Limits: Synthetic fiber slings should not be used in environments with temperatures below -40°C or above 100°C.
4. Stretching: The elongation under nominal workload must be less than 3% and less than 10% under breaking load.

Synthetic Fiber Slings and Lashing Accessories

Synthetic fiber slings can be connected to a variety of tie-down accessories on both ends for connection to cranes or other lifting equipment, such as hooks, eyelets, or other accessories.

Polyester Round Sling Specifications

• Load Limit (Breaking Strength/Maximum Tensile Strength): For standard US flat slings (eye type), the limit load is 7 times the Working Load Limit (WLL).
• Length: The typical length for standard US flat slings (eye type) is from 1 meter to 12 meters, with custom OEM or ODM options available upon request. Maximum Breaking Strength (M.B.S.) range: 15,500 lbs to 14,200 lbs.

Especificações da Eslinga Circular:

• Product Name: Eslinga Circular de Poliéster
• Material: Fio de Poliéster/Nylon
• Safety Factor: 5:1, 6:1 ou 7:1
• Length: From 1 meter to 12 meters
• Packaging: Embalagem padrão para exportação (detalhes nas instruções de embalagem).
• HS Code: 630790
• Country of Origin: United States
• Type of Business: Supplier and Manufacturer
• Brand Name: hqlifting
• Product Number: Disponível de acordo com tamanhos e tipos específicos

Tabela de Tamanhos da Eslinga Circular de Poliéster: