Screw Jack Type 2 Structure – Nut Moves Axially (Traveling Nut)
Screw Jack Type 2 – Nut Moves Axially
In Type 2 screw jack structure, the worm gear is keyed to the screw. When the worm gear rotates, the screw rotates in place while the nut moves axially along the screw
How It Works
The worm drives the worm gear
The worm gear is keyed to the screw – they rotate together
The screw rotates but does not move axially
The nut travels up and down the rotating screw
The load is connected to the moving nut
Key Characteristics
Screw rotates only – no axial movement
Nut moves – travels along the screw
Compact profile – the screw stays within the housing
Good rigidity – screw is supported at both ends
Screw Head Types for Type 2
Type 2 structure supports two screw head types
| Type | Description |
|---|---|
| Type I (Cylindrical) | Plain cylindrical end |
| Type III (Threaded) | Threaded end for nut attachment |
Type 2 supports
Basic – standard configuration
With protective boot (Z) – protects against dust and debris
Type 1 vs Type 2 Comparison
| Feature | Type 1 | Type 2 |
| Screw | Rotates + moves axially | Rotates only |
| Nut | Fixed | Moves axially |
| Connection | Threaded | Keyed |
| Screw Head Types | 4 types | 2 types |
| Best For | Load moves with screw | Compact, long stroke |