GBCTN-200 CNC 6 Axis Hobbing Machine
The GBCTN-200 CNC 6 Axis Hobbing Machine is a heavy-duty vertical hobbing centre for workpieces up to Φ200 mm and module M6. With a rigid casting frame, stable rolling hob-head spindle design, and FANUC 0i-MF Plus control, it is the preferred choice for wind-energy, marine, and industrial speed-reducer gear production.
GBCTN-200 CNC 6 Axis Hobbing Machine — Heavy-Duty Performance for Φ200 mm Gear Production
Manufacturers requiring consistent DIN 5-6 quality on larger gear blanks will find the GBCTN-200 an ideal platform. As part of the GBCTN-200/350 series, this vertical CNC 6 axis hobbing machine is configured for workpieces up to Φ200 mm and M6 module — a sweet spot for industrial speed reducers, wind-turbine accessories, and marine gearbox components. The high-rigidity heavy-machining bed casting suppresses vibration during large-module interrupted cuts, while the stable-and-adjustable rolling hob-head spindle design ensures hob runout remains under 3 um even at maximum torque. With a 35 KVA main power supply and FANUC 0i-MF Plus, the GBCTN-200 handles multi-start worm gear production and herringbone finishing passes with equal ease. See how it compares in the GBC hobbing machine family.
Heavy-Duty Bed & Hob-Head Engineering
The GBCTN-200 machine body is cast from high-grade Meehanite iron in a single-piece construction, annealed to relieve residual stresses before precision-boring and grinding. The cross-section geometry places maximum material at points of highest bending load, raising natural frequency well above the cutting-force spectrum generated by M6 module hobbing. The hob-head spindle runs in pre-loaded angular-contact bearing sets with adjustable preload. C-axis direct-drive table rotation ensures zero backlash workpiece synchronisation — critical for multi-start worm hobbing and differential helix corrections.
❖ Key Features
️ High-Rigidity Heavy-Machining Bed
Single-piece Meehanite iron, stress-relief annealed, fully ground guideways — sustains M6 module interrupted cuts without structural fatigue.
Stable Adjustable Rolling Hob Spindle
Pre-loaded angular-contact bearings with field-adjustable preload keeps hob runout <3 um across full 1000 rpm speed range.
High-Torque Large-Diameter Ultra-Precision Machining
900 Nm direct-drive table torque (1000 Nm optional) enables dry hard-hobbing of large-module ring gears in a single setup.
High-Speed Direct-Drive Rotary Table
Max.200/300 rpm with 900 Nm direct torque ensures phase accuracy for multi-start worm gear generation and differential crown correction.
Mirror Stainless Chip Trough
Continuous polished-steel inner lining allows self-draining chip evacuation — simplifying clean-up in wet and near-dry cutting scenarios.
️ FANUC 0i-MF Plus & 35 KVA Power
Higher power class suits M6 alloy steel cutting demands; nano-interpolation ensures smooth tooth-flank surface finishes at aggressive feed rates.
Target Application Sectors
️ Wind Energy
Yaw-ring accessory gears, pitch-actuator pinions, and auxiliary gearbox components for onshore and offshore wind installations.
⚙️ Industrial Speed Reducers
Parallel-shaft, bevel-helical, and worm-reduction input and intermediate stage gears for cement, mining, and bulk-handling equipment.
⚓ Marine Propulsion Gearboxes
Highly loaded helical gear pairs for diesel-engine reduction gearboxes requiring DIN 4-5 accuracy and rigorous surface-integrity inspection.
️ Oil & Gas Equipment
Mud-pump gear sets, compressor drive pinions, and rotary-table ring gears where subsurface reliability is non-negotiable.
Rail & Heavy Transport
Traction motor pinions, bogie final-drive gears, and locomotive reduction-set components requiring certified dimensional traceability.
Technical Specifications
| Parameter | GBCTN-200 Specification |
|---|---|
| Max. Workpiece (OD x Module) | Φ200 mm x M6 |
| Max. Helix Angle | +/-45° |
| Table (C Axis) Diameter | Φ200 mm |
| Spindle Nose Taper | BT#40 Taper |
| Max. Hob Size (OD x Length) | Φ150 mm x 220 mm |
| Max. Hob Shift Travel | 180 mm |
| Hob Spindle (B Axis) | Max. 1000 rpm | S1=35.8 Nm, S3=95.5 Nm |
| Table Rotation (C Axis) | Max. 200/300 rpm* | Direct-drive 900/1000 Nm* |
| Radial Feed (X Axis) | Max. 12000 mm/min | 250 mm (35-285 mm) |
| Tangential Feed (Y Axis) | Max. 2500 mm/min | 180 mm (0-180 mm) |
| Axial Feed (Z Axis) | Max. 10000 mm/min | 240 mm (150-390 mm) |
| Helix Angle Speed (A Axis) | Max. 720 deg/min | +/-45° |
| Hyd. Tailstock (U Axis) | Max. 6000 mm/min | 300 mm (340-640 mm) |
| Main Power | 35 KVA |
| Control System | FANUC 0i-MF Plus |
| Floor Space (L x W x H) | 3950 x 3450 x 2750 mm |
| Machine Weight | 9.5 ton |
* 300 rpm / 1000 Nm optional
Standard Configuration & Optional Accessories
Standard Configuration
- C-axis direct-drive motor with backup rotary encoder
- Servo tailstock
- Mist cutting and machine-body cleaning device
- Tool pre-setter
- Post-cut spindle protection function
- Chip-scraper system
- Internal cooling device
- Mist centrifugal collector
- Hydraulic system
- Auto-lubrication device
- Pneumatic device
- Control cabinet with air conditioner
- Three-colour indicator light
- Mirror stainless chip-trough design
Optional Accessories
- Dry-cutting function
- End-face deburring device
- Second-cut device
- Servo tailstock upgrade
- Oil-mist electrostatic collector
- Dry-cut high-efficiency collector
- Magnetic contact detection device
- Cutting fluid cooling system
- B-type new energy regenerative protection
- Fixture and chuck
- Hobbing cutters
- Rotary robot arm
- Auto loading/unloading system
- X-axis linear-guide force-clamping system
Customer Reviews & Case Studies
★★★★★
Denmark — Wind Turbine Component Manufacturer
We source GBCTN-200 machines for our pitch-drive accessory gear production. The high-torque C-axis and rigid bed handle M6 cuts in 42CrMo4 without chatter — a persistent problem with our previous machines. On-time delivery of replacement hobs and fast email support from the GBC team have made this an easy long-term relationship.
— Lead Manufacturing Engineer, wind energy components
★★★★★
South Korea — Marine Gearbox Manufacturer
Our facility produces helical reduction gears for diesel-engine marine gearboxes in the Φ150-200 mm range. The GBCTN-200 delivers DIN Class 5 finish in a single hobbing pass on quenched-and-tempered steel. Process qualification was completed in four weeks including first-article inspection reports.
— QA Manager, marine propulsion division
★★★★☆
Turkiye — Industrial Gearbox OEM
We manufacture parallel-shaft gearboxes for the cement and aggregate industries. The GBCTN-200 replaced three older machines, consolidating three operations into one. Cycle time for our Φ185 mm M5 helical gears dropped by 32%. The optional rotary robot arm significantly reduces inter-operation handling time.
— Operations Director, industrial speed-reducer production
Frequently Asked Questions
Q1: What is the maximum module achievable on the GBCTN-200?
The GBCTN-200 is rated to M6 maximum module. For coarser pitches, GBC recommends the GBCTN-350 (up to M8) or the GBCTN-500 (up to M14).
Q2: Can I automate the GBCTN-200 for unmanned overnight production?
Yes. The optional rotary robot arm and auto loading/unloading system enable lights-out operation for disc-type workpieces. The FANUC controller supports macro-based alarm notification and remote monitoring via Ethernet.
Q3: What accuracy class is achievable after hobbing on the GBCTN-200?
Under normal production conditions with fresh HSS-PM or carbide hobs, DIN 5-6 (ISO 1328 Class 5-6) is routinely achieved. Wind-turbine gear accessory customers have demonstrated DIN 5 on alloy steel without subsequent grinding.
Q4: How long does commissioning and operator training take?
Typical on-site commissioning takes 3-5 days. GBC provides a 2-day structured operator training programme covering FANUC program entry, hob-shift management, and preventive maintenance procedures.
Q5: Are spare parts readily available for the GBCTN-200?
FANUC servo drives, spindle bearings, hydraulic seals, and linear guideway carriages are all standard items held in GBC's parts inventory and available for international express shipment.
Scale Up Your Large-Module Gear Capacity
Contact GBC to discuss how the GBCTN-200 CNC 6 Axis Hobbing Machine fits your production programme. We offer process feasibility studies, sample-part machining trials, and flexible B2B procurement arrangements worldwide.
Compare all capacity classes in the GBC CNC Hobbing Machine catalogue or return to our homepage to explore the wider product range.
The GBCTN-200 CNC 6 Axis Hobbing Machine is a heavy-duty vertical hobbing centre for workpieces up to Φ200 mm and module M6. With a rigid casting frame, stable rolling hob-head spindle design, and FANUC 0i-MF Plus control, it is the preferred choice for wind-energy, marine, and industrial speed-reducer gear production.
