ISO 23776:2020 Chain Electric Hoist Specs
ISO 23776:2020, "Technical Specifications for Electric Hoists," serves as the product standard for Chain Electric Hoists. It defines the hoist classification (9 specifications covering a lifting capacity range of 0.1–5 t), technical requirements (Grade 80 Alloy Steel chain with a Safety factor ≥ 4; Conical rotor motor with self-braking and a Braking torque ≥ 1.5 times the rated torque; chain speeds of 4–20 m/min for single-chain and 2–10 m/min for double-chain configurations; Lifting Height of 3–12 m; IP54 protection with noise levels ≤ 82 dB(A)), safety devices (overload Limit Switch that halts operation at 105% load, upper and lower limit switches, and a chain guide mechanism), and test methods to ensure safe and reliable operation.
Technical Parameters
Lifting Capacity: 0.1–5 t; Lifting Height: 3–12 m (up to 30 m for special applications). Chain speed: 4–20 m/min (single chain), 2–10 m/min (double chain). Chain: Grade 80 Alloy Steel with a Safety factor ≥ 4. Motor: Conical rotor with self-braking, Braking torque ≥ 1.5 times rated. Protection rating: IP54; Noise ≤ 82 dB(A). Kelude Heavy Industry manufactures these hoists according to the standard.
Safety and Testing
Overload protection stops operation at 105% of rated capacity. Upper and lower limit switches and a chain guide are standard. Factory tests include a No-load run for 5 minutes, 3 rated-load cycles with braking distance ≤ 50 mm, and a 1.25 times overload hold for 10 minutes. Type tests include a 150-hour endurance run.
| Critical | Value |
|---|---|
| 0.1~5t | 3~12m |
| 80Grade Alloy Steel | ≥4Times |
| Conical rotor | ≥1.5Times |
| IP54 | ≤82dB(A) |
| Item | Description |
|---|---|
| Standard | ISO |
| Inspection | factory+type test |
Chain electric hoists are widely used for material handling on factory assembly lines and in warehouses thanks to their compact design and light weight. The load chain is made of Grade 80 alloy steel with a safety factor of ≥4, ensuring safe and reliable operation under rated load and impact conditions. Lifting capacities range from 0.1 to 5 t, covering light- and medium-duty hoisting applications, with lifting heights from 3 to 12 m (up to 30 m on request). Chain speeds are 4–20 m/min for single-fall configurations and 2–10 m/min for double-fall setups. The hoist is driven by a conical rotor motor with an integrated self-braking design, delivering a braking torque of at least 1.5 times the rated load moment. With IP54 protection, it is well suited to general industrial environments. Safety features include an overload limiter that automatically stops hoisting at 105% of rated load, upper and lower limit switches to prevent the hook from over-traveling or bottoming out, and a chain guide that prevents twisting and jamming during operation. Kelude manufactures chain electric hoists in accordance with ISO 23776, and every unit ships with a Certificate of Conformity and test report.
Frequently Asked Questions
Q: What are the lifting capacity range and chain safety requirements for chain electric hoists?
A: Lifting capacities range from 0.1 to 5 t across nine models (0.1/0.25/0.5/1/2/2.5/3/4/5 t). The load chain is made of Grade 80 alloy steel with a minimum breaking force of at least 4 times the rated load, giving a safety factor of ≥4. Chain width and chain size are selected according to the lifting capacity. Lifting heights range from 3 to 12 m (up to 30 m on request). Chain speeds are 4–20 m/min for single-fall and 2–10 m/min for double-fall configurations.
Q: What safety devices are fitted on chain electric hoists?
A: An overload limiter automatically stops hoisting when the load reaches 105% of rated load, preventing overload conditions. Upper and lower limit switches prevent the hook from over-traveling or bottoming out. A chain guide prevents chain twisting and jamming during lifting and lowering. The brake is a conical rotor self-braking design with braking torque of at least 1.5 times the rated load moment. Protection rating is IP54, and noise level is ≤82 dB(A).
Q: What do routine factory tests cover?
A: No-load operation for at least 5 minutes with no abnormalities. Three lifting/lowering cycles at rated load with a brake slip distance of ≤50 mm (stricter than the requirement for wire rope electric hoists). A static load test at 1.25 times rated load held for 10 minutes with no permanent deformation. Type testing includes a 150-hour endurance test. Every Kelude hoist ships with a Certificate of Conformity and test report.
Q: What manufacturing standard do Kelude chain electric hoists comply with?
A: Kelude manufactures chain electric hoists to ISO 23776:2020, with lifting capacities from 0.1 to 5 t, Grade 80 alloy steel chain, and a safety factor of ≥4. The motor features a conical rotor with self-braking and braking torque of at least 1.5 times the rated moment. Each unit undergoes three factory tests before shipment and comes with a Certificate of Conformity and test report.
