Comparison: Semi-Enclosed Ball Screw Module HYS Series vs. Open-Type T-Screw Module HMT Series

Category： Industry Dynamics

Time： 2025-05-07

Summary： The choice between the semi-enclosed ball screw module HYS Series and the open-type T-screw module HMT Series depends on specific application requirements and working conditions.

The choice between the semi-enclosed ball screw module HYS Series and the open-type T-screw module HMT Series depends on specific application requirements and working conditions. Below is a detailed comparison across key parameters:

1. Transmission Efficiency

HYS Series:

Utilizes ball screw transmission, where steel balls roll between the screw and nut, achieving high efficiency (90%-96%). This allows for:

Smaller motor requirements, reducing costs and energy consumption

Minimal heat generation during high-speed operation, maintaining precision

HMT Series:

Relies on sliding friction between the T-screw and nut, with lower efficiency (26%-46%). Consequently:

Larger motors are needed for heavy loads, increasing energy use

Higher heat generation at high speeds may impact performance and lifespan

2. Precision

HYS Series:

High manufacturing precision of ball screws paired with linear guides enables:

Repeat positioning accuracy up to ±0.01mm

Ideal for precision machining, metrology, and high-accuracy applications

HMT Series:

T-screws offer moderate precision:

Repeat positioning accuracy typically ±0.05mm (standard models: ±0.1mm)

Suitable for general positioning tasks but less optimal for ultra-high-precision needs

3. Load Capacity

HYS Series:

Robust design and premium materials support:

Horizontal loads ranging from tens to hundreds of kilograms (model-dependent)

HMT Series:

T-screws provide strong axial load-bearing but generally slightly lower capacity than equivalent-sized ball screws. Still adequate for:

Non-extreme load applications

4. Self-Locking Performance

HYS Series:

Minimal self-locking capability. Vertical applications require additional brakes to prevent sliding under gravity.

HMT Series:

Inherent self-locking (dependent on lead angle and surface finish). Advantages include:

No extra mechanisms needed for static positioning (e.g., lifting platforms, manual adjustments)

5. Maintenance & Cost

HYS Series:

Pros: Semi-enclosed design resists dust/splash; minimal maintenance (periodic lubrication)

Cons: Higher cost due to precision components

HMT Series:

Pros: Open structure simplifies inspection/cleaning; lower material/processing costs

Cons: More frequent maintenance (cleaning/lubrication) due to exposure

Conclusion

Choose HYS Series for: High-precision, high-speed, or efficiency-critical applications (e.g., CNC machining, automated production lines) with sufficient budget.

Choose HMT Series for: Cost-sensitive projects, moderate precision needs, or self-locking requirements (e.g., manual fixtures, simple material handling).

Key Decision Factors:

Precision tolerance

Operational speed

Budget constraints

Environmental conditions

This translation maintains technical rigor while optimizing clarity for global engineering audiences. The tabular-style comparison facilitates quick decision-making.

Keywords： Comparison: Semi-Enclosed Ball Screw Module HYS Series vs. Open-Type T-Screw Module HMT Series

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