Screw Jack Transmission Types – Worm Gear vs Bevel Gear – Which One to Choose?
Screw Jack Transmission – Worm Gear vs Bevel Gear
Screw jacks can be classified by their internal transmission mechanism – the two main types are worm gear drive and bevel gear drive
Worm Gear Drive Screw Jack
The most common type, using a worm and worm gear to transmit power
| Feature | Description |
| Efficiency | Moderate (varies by ratio) |
| Self-locking | Yes – standard feature |
| Noise | Low |
| Speed | Suitable for low to medium speeds |
| Best For | Intermittent operation, heavy loads, load holding |
Using bevel gears instead of worm gears for power transmission
| Feature | Description |
| Efficiency | Higher than worm gear |
| Self-locking | No – requires external brake |
| Noise | Low |
| Speed | Suitable for higher speeds |
| Best For | Continuous operation, high-speed lifting |
| Feature | Worm Gear Type | Bevel Gear Type |
| Efficiency | Lower | Higher |
| Self-locking | Yes | N0 |
| Speed Ratio | Higher reduction | Flexible, easier to adjust |
| Synchronization | More complex | Easier for multiple units |
| Continuous Operation | Limited by heat | Better suited |
How to Choose
Choose worm gear type for heavy loads, load holding, infrequent operation, and when self-locking
is required
Choose bevel gear type for continuous operation, higher speeds, multi-unit synchronization, and when
higher efficiency is needed