GTH Series High Torque Ball Screw Linear Stage

The GTH Series is a ball screw driven linear module built for applications that demand high thrust output, exceptional rigidity, and micron-level positioning accuracy. Its oversized screw diameter and preloaded nut assembly deliver stable motion under heavy cutting loads, making it a preferred choice for CNC machining centers, gantry robots, and high-force assembly stations.

Core Advantages

• Achieve ±0.005 mm repeatability – holds precise positioning even under fluctuating load conditions.
• Deliver high thrust output via a larger-diameter ball screw and preloaded nut that minimizes backlash.
• Support both horizontal and vertical mounting – handles heavy payloads in any orientation with optional brake.
• Maintain rigidity under thermal drift with an optimized aluminum extrusion profile that dissipates heat evenly.
• Reduce friction and wear through precision-ground guide rails and recirculating ball bearings.
• Adapt to multiple motor interfaces – accepts servo or stepper motors with flexible coupling options.

Technical Specifications

Design & Performance Highlights

The GTH carriage is supported by a wide-base dual-rail system that resists moment loads in pitch, roll, and yaw directions – a critical requirement for single-axis cantilever or multi-axis gantry configurations.

The ball screw assembly uses a double-nut preload mechanism that actively eliminates axial backlash, ensuring that bidirectional positioning errors stay within the ±0.005 mm spec throughout the entire stroke. Thermal compensation channels integrated into the base extrusion help maintain consistent preload even after extended high-duty operation, reducing the need for frequent re-calibration.

Typical Applications

• CNC machining systems (milling, drilling, routing)
• Automated production lines with heavy payload transfer
• Laser cutting and engraving equipment
• Gantry robot systems
• Pick-and-place automation (heavy components)
• Industrial inspection and metrology stages

Motor & Configuration Options

The GTH supports both servo and stepper motor drives, with optional mounting brackets for popular motor brands (Mitsubishi, Yaskawa, Panasonic, Delta). Coupling types include rigid, bellows, or Oldham couplings depending on torque and misalignment requirements.

Customization Options

• Custom stroke lengths (outside 100–1200 mm range)
• Screw lead selection (5/10/20 mm) to optimize speed vs. thrust
• Motor mounting bracket for specific servo/stepper models
• Integrated home and limit sensors (NPN/PNP, magnetic or optical)
• Vertical orientation brake kit
• Protective bellows or metal covers for dusty environments

Why Choose the GTH?

For many CNC and robotics applications, the fundamental trade-off is between speed (belt drive) and thrust/rigidity (ball screw). The GTH Series is explicitly optimized for the latter: its oversized screw and dual-nut preload system deliver 3× to 5× higher axial thrust than a typical belt-driven stage of similar footprint, while maintaining ±0.005 mm repeatability – a level of precision that belt systems cannot sustain under varying loads.

Compared to standard ball screw modules, the GTH's wider guide rail base and thermally compensated extrusion provide superior resistance to moment loads and thermal growth, making it particularly suitable for continuous-duty CNC operations where part quality depends on stable tool positioning over multi-hour production runs. If your application prioritizes high cutting forces or heavy payload transfer over raw speed, the GTH offers the rigidity and longevity required for 24/7 industrial environments.