How To Choose Normally-open-and-close Guide Rail Clamps？

The selection of open-type and closed-type guide clamping element mainly depends on factors such as safety requirements of the application scenario, stability of power supply, and frequency of operation. The following is a detailed analysis:

1. Safety priority

· Normally Closed Type: Suitable for scenarios with extremely high safety requirements, such as elevators, cranes, vertical-axis lifting platforms, etc. In the event of power failure, gas interruption, or system malfunction, the normally closed clamping device relies on spring force to automatically clamp the guide rail, preventing the load from falling or the equipment from losing control, thus ensuring the safety of personnel and equipment.

· Normally Open Type: Suitable for non-critical safety scenarios, such as temporary shutdown of horizontal conveyors, auxiliary positioning, etc. When power or gas is lost, the clamping device automatically releases, allowing the shaft to rotate freely, without the need for additional power to maintain the released state.

2. Stability of power supply

· Normally Closed Type: If the power source (air pressure, hydraulic pressure, electricity) is prone to fluctuations or interruptions, and movement of the shaft is not allowed after the interruption, the normally closed type is more suitable. It can automatically lock the shaft when power is interrupted, preventing accidental movement due to power issues.

· Normally Open Type: If the power supply is stable and the clamping action only requires a brief trigger, the normally open type is more energy-efficient. It only consumes power during clamping and does not require continuous power supply when releasing.

3. Motion frequency

· Normally Open Type: If you need frequent "release - clamp" operations (such as multiple positioning per minute), the normally open type is more economical. It consumes energy when clamping but does not consume energy when releasing. Long-term use can reduce energy costs.

· Normally Closed Type: If the operation frequency is low (such as a few starts and stops per day), the energy consumption difference between the normally open type and the normally closed type can be ignored. In this case, safety requirements should be prioritized.

In summary, if the scenario involves personnel safety, equipment protection against damage, or situations where the shaft cannot move after power interruption, the normally-closed type should be chosen; if it is a non-critical safety scenario, with stable power supply and frequent operation required, the normally-open type is more suitable. When making the actual selection, factors such as the size of the guide rail, the force requirement for retention, and the installation space should also be comprehensively considered.

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