JWM Screw Jack Self-Locking – What It Is and Why It Matters
JWM Screw Jack Self-Locking – What It Is and Why It Matters
One of the most important features of the JWM trapezoidal screw jack is its self-locking capability
What Is Self-Locking?
Self-locking means the jack holds the load in position even when power is off. You don't need an external brake to prevent the load from dropping.
Why Does JWM Have Self-Locking?
The trapezoidal screw thread creates friction between the screw and nut. This friction is strong enough to prevent the load from back-driving the mechanism.
When Does It Work?
Self-locking is reliable under normal, steady conditions:
Static loads
Smooth operation
No vibration or shock
When Does It NOT Work?
Self-locking may fail under:
●Heavy vibration or shock loads
●Impact forces
In these cases, an external brake is required.
Quick Summary
| Condition | Self-Locking Status |
|---|---|
| Normal operation | ✅ Works – no brake needed |
| Vibration or shock | ⚠️ May fail – brake required |
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