TONE Electric Nutrunner (GST Series)
The TONE GST Series Electric Nutrunner delivers automatic torque shut-off with a built-in controller — no external control box required. Available in torque ranges from 1,000 N·m to 10,000 N·m, these double-insulated, pistol-grip tools are built for structural, civil, and industrial bolting where precision and consistency are non-negotiable. Supplied with reaction bar and metal case. Available in 100V and 200V from HTC.
More Information
The TONE GST Series delivers precise, automatic torque control for heavy structural, civil, and industrial bolting — with the controller built directly into the tool. No external box. No trailing leads. Just plug in and work.
Why the GST Series
Most electric nutrunners at this torque level require a separate controller unit connected by cable. The GST Series eliminates that entirely — the torque controller is housed inside the tool body, keeping the setup clean and the worksite safer. Set your target torque on the large dial, connect to power, and the tool stops automatically when it hits the mark. Every time, regardless of operator experience.
Key Features
- Integrated torque controller — no external control box required; cleaner setup, fewer trip hazards on site
- Automatic shut-off — stops precisely at the preset torque value, delivering consistent results regardless of operator
- Bidirectional operation — full torque control in both tightening and loosening directions
- ±5% repeat tightening accuracy — under consistent conditions across all models in the range
- Double-insulated construction — operator safety prioritised across the full series
- Low noise, no percussion — rotary mechanism only; significantly quieter and lower vibration than impact wrenches
- Compact and lightweight — substantially smaller and lighter than the previous-generation PXSA series it replaces
Typical Applications
The GST Series is suited to any application where torque-regulated fastening of hexagonal bolts and nuts is required, including:
- Structural steelwork and high-tension bolt installation
- Bridge and civil infrastructure construction
- Road construction and barrier systems
- Rail and railway infrastructure
- Industrial plant maintenance and assembly
- Heavy equipment installation
Range Overview
Four torque tiers cover the full spectrum from mid-range structural bolting through to the heaviest industrial applications:
| Tier | Models | Torque Range | Drive |
|---|---|---|---|
| Mid-range | GST211T / GST212T | 1,000 – 2,100 N·m | 1″ square drive |
| Heavy | GST401 / GST402 | 1,600 – 4,000 N·m | 1½” square drive |
| High-load | GST601 / GST602 | 2,400 – 6,000 N·m | Spline socket SPS60 |
| Ultra-heavy | GST-1001 / GST-1002 | 4,000 – 10,000 N·m | Spline socket SPS100 |
All models available in 100V and 200V single-phase. Each unit supplied with L-shaped reaction bar and metal carrying case.
📊 Specifications — TONE GST Series Electric Nutrunner
| Model | Torque Range (N·m) | Drive Type | Drive Size | No-Load Speed (rpm) | Voltage (V) | Max Current (A) | Max Power (W) | Weight (kg) | Dimensions W×D×H (mm) |
|---|---|---|---|---|---|---|---|---|---|
| GST211T | 1,000 – 2,100 | Square drive | 25.4 mm (1″) | 5 | 100V | 13.5 | 1,350 | 8.6 | 365 × 455 × 130 |
| GST212T | 1,000 – 2,100 | Square drive | 25.4 mm (1″) | 5 | 200V | 6.5 | 1,350 | 8.6 | 365 × 455 × 130 |
| GST401 | 1,600 – 4,000 | Square drive | 38.1 mm (1½”) | 4 | 100V | 21 | 1,900 | 9.0 | 365 × 455 × 130 |
| GST402 | 1,600 – 4,000 | Square drive | 38.1 mm (1½”) | 4 | 200V | 10.5 | 1,900 | 9.0 | 365 × 455 × 130 |
| GST-601 | 2,400 – 6,000 | Spline socket | SPS60 | 2.5 | 100V | 20 | 1,800 | 11.4 | 373 × 338 × 100 |
| GST-602 | 2,400 – 6,000 | Spline socket | SPS60 | 2.5 | 200V | 10 | 1,800 | 11.4 | 373 × 338 × 100 |
| GST-1001 | 4,000 – 10,000 | Spline socket | SPS100 | 1.5 | 100V | 20 | 1,800 | 16.3 | 452 × 346 × 110 |
| GST-1002 | 4,000 – 10,000 | Spline socket | SPS100 | 1.5 | 200V | 10 | 1,800 | 16.3 | 452 × 346 × 110 |
Note: GST-601, GST-602, GST-1001, and GST-1002 are made-to-order. Please contact HTC to confirm lead times before ordering. Custom spline sockets available for these models on request.
All models: Repeat tightening accuracy ±5% · Bidirectional (tighten/loosen) · Double-insulated · Pistol-type body · Wired power supply · Supplied with L-shaped reaction bar and metal case
