When evaluating the quality issues of low clearance electric hoists, comprehensive considerations can be made from multiple dimensions such as equipment structure, performance parameters, safety devices, operating conditions, manufacturing processes and materials, and maintenance. The following is a specific analysis:

1、 Equipment structure and appearance

Shell and Material: Check if the shell material is thick, if the surface treatment is uniform and free of burrs, and if there is rust on the metal parts. Gears and chains made of alloy steel are usually more durable.

Compact and aesthetic: The design of the low clearance electric hoist is compact, and it should be checked whether it has achieved external optimization, such as whether the cable layout is reasonable, whether the counterweight design saves materials and reduces external dimensions.

2、 Performance parameters and testing

Load bearing capacity: Conduct load bearing capacity testing according to the specifications and design requirements of the equipment to ensure that the equipment can lift and transport the required load normally.

Running test: Start the device and conduct a running test to observe the working status, noise level, and vibration of the device during operation. After running continuously for a period of time, touch the motor casing to check the temperature rise. If the temperature rise is too high, there may be a defect in the heat dissipation design.

Motor performance: Test whether the motor starts smoothly and whether there is any lag when switching between different gears. Brushed motors have lower costs but faster carbon brush wear, while brushless motors have longer maintenance cycles and are more suitable for frequent operations.

3、 Safety devices and protection

Limit protection: The rising limit device must undergo actual collision testing to ensure that the power can be accurately cut off when the hook reaches the vertex. The limit device should be sensitive and reliable to prevent overloading or over discharge.

Overload protection: The overload protection device should automatically cut off power when the rated load reaches a certain proportion (such as 110%), ensuring that the equipment can stop running in a timely manner in case of overload.

Emergency stop: The emergency stop button should be prominent and easy to touch to ensure that the equipment can be quickly stopped in case of emergency.

4、 Operation status and operation

Braking performance: The brake should be flexible and reliable. Check the smoothness of the friction surface and whether the braking sliding amount meets the standards.

Operating feel: The handle switch should have anti misoperation design, and the button should rebound crisply without adhesion. Wireless remote control devices should be tested for signal stability and observed for command delays or conflicts.

Wire rope and chain: Check whether the wire rope is correctly wound in the groove of the drum rope, whether the lubrication is good, and whether there is any phenomenon of detachment from the pulley groove. The lifting chain should be equipped with a guiding device to prevent over winding and detachment from the lifting sprocket.

5、 Manufacturing process and materials

Welding quality: The welding area needs to be smooth and firm to avoid virtual welding or leakage affecting the structural strength.

Quality of components: Check whether the hook has significant rated lifting capacity markings and locking devices to prevent accidental slippage of the rigging. The drum and pulley should be checked for the reliability of the fixing device and whether the pulley itself has burrs or debris.

6、 Maintenance and Record keeping

Maintenance plan: Check if the equipment has a regular maintenance plan, including lubrication, fastener inspection, replacement of vulnerable parts, etc.

Inspection record: Check whether the product nameplate parameters are consistent with the instructions, and keep complete acceptance records, including detailed data of no-load testing, rated load testing, and static load testing.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment