Electromagnetic Chuck

Working principle

● Electric suction cup: Powered by a built-in battery or an external power source, it generates a magnetic field to adsorb metallic materials through direct current. The typical voltage is 24V or 48V, and the suction force range is usually 5 to 20 tons.

● Hydraulic suction cup: Driven by the hydraulic system of the excavator, hydraulic oil drives the electromagnetic coil to generate electricity. It has stronger suction force and is adjustable. It generally supports loads of 10 to 50 tons and is suitable for heavy industrial applications such as waste material transportation in steel mills. 2. Performance Comparison

Performance Comparison

● Energy Consumption: The electric suction cup has low power consumption (approximately 2-5 kW/h) but requires frequent charging for continuous operation. The hydraulic suction cup relies on the main unit for power supply, resulting in higher fuel consumption but strong operational stability.

● Response speed: The electric suction cup starts and stops more quickly (within 0.5 seconds), while the hydraulic suction cup has a 1-2 second delay due to the oil circuit transmission.

Application Scenarios for Electric Suction Cups

● Short-term, scattered operations (such as steel bar recycling at construction sites).

● Noise-sensitive environments (electric operation noise ≤ 65 decibels, while hydraulic type ≥ 75 decibels).

Advantages of Hydraulic Suction Cups

● Long periods of continuous operation (such as the dismantling of port containers).

● Extremely temperature-sensitive environment (hydraulic oil temperature range -30°C to 80°C, performance of the electric battery drops by 30% when the temperature is below -10°C).

Key Points for Maintenance of Electric Suction Cups

● Regularly check the battery life (lead-acid batteries should be replaced every 2 years, while lithium batteries can last up to 5 years).

● Avoid allowing the coil to get damp, which could cause a short circuit.

Safety Precautions for Hydraulic Suction Cups

● The host hydraulic flow needs to be matched (recommendation: ≥ 30L/min), otherwise the suction force will be unstable.

● Replace the hydraulic oil filter every 500 hours.