What is the difference between JWM trapezoidal elevator and JWB spiral ball screw jack?
JWM vs JWB Screw Jack – Trapezoidal vs Ball Screw
JWM and JWB are the two main types of JW series screw jacks. The difference is the screw type.
Quick Comparison
| Feature | JWM (Trapezoidal) | JWB (Ball Screw) |
| Screw type | Trapezoidal thread | Ball screw |
| Friction | Sliding | Rolling |
| Self-locking | ✅ Yes | ❌ No |
| Speed | Low | High |
| Frequency | Low | High |
| Efficiency | Lower | Higher |
| Cost | Lower | Higher |
Which One Should You Choose?
| Your Application | Choose |
|---|---|
| Heavy loads, infrequent lifting | JWM |
| Load holding without brakes | JWM |
| High-speed, frequent cycles | JWB |
| Precision positioning | JWB |
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