YAMA SEIKI GT-300 is a high-performance CNC turning center designed for precision machining of medium-sized components in demanding production environments. It features a rigid slant-bed cast iron construction that provides excellent vibration damping and thermal stability, ensuring consistent machining accuracy during high-speed and heavy-duty turning operations. The GT-300 is suitable for machining a wide range of materials, including steel, stainless steel, cast iron, and aluminum, and is commonly used in automotive, heavy equipment, oil and gas, and general manufacturing applications.
The GT-300 is typically equipped with a high-torque spindle and a fast-indexing servo-driven turret system that reduces tool change times and improves cycle efficiency. Advanced CNC control systems provide high-speed data processing, smooth contouring, and intuitive programming capabilities, supporting complex turning operations with high repeatability. Optional configurations such as live tooling, Y-axis, sub-spindle, and tailstock enable drilling, tapping, and milling operations in a single setup, minimizing part handling and improving productivity. Precision linear guideways and high-performance servo drives further enhance positioning accuracy and surface finish quality.
Yama Seiki engineered the GT-300 for durability and long-term industrial use, with robust mechanical components, optimized chip evacuation, and automation-ready features for integration into production lines. Its combination of rigidity, power, and flexibility makes it a reliable solution for manufacturers seeking stable and productive turning performance in continuous production environments.
YAMA SEIKI GT-300SPECIFICATIONS
TRAVEL & CAPACITY
Swing Over Bed: ~600 mm (~23.6″)
Swing Over Carriage / Saddle: ~450 mm (~17.7″)
Max Turning Diameter: ~360–440 mm (~14.2–17.3″)
Max Turning Length: ~700–1,262 mm (~27.6–49.7″)
Distance Between Centers: ~891–1,441 mm (~35.1–56.7″)
X-Axis Travel: ~245–275 mm (~9.65–10.8″)
Z-Axis Travel: ~700–1,292 mm (~27.6–50.9″)
SPINDLE
Max Spindle Speed: ~3,500 rpm
Spindle Nose: A2-8
Spindle Motor: ~15–25 HP (~11–18.5 kW)
Front Bearing Diameter: ~130–160 mm
Hole Through Spindle: ~88–105 mm
Good torque for medium-duty turning and finishing
TOOL TURRET
Turret Type: Servo/hydraulic indexed turret
Tool Station Capacity: Typical 10–12 tools
Tool Holder Shank Size: ~25–32 mm
Standard tooling supports turning, grooving, drilling
FEEDRATES
Rapid Traverse (X/Z): ~787–945 IPM (~20–24 m/min)
Cutting Feedrate: Application dependent
CONTROL SYSTEM
CNC Control: FANUC (common industrial platform)
Programming: Standard G-code
Interface: Operator panel with jog & override
Diagnostics and system monitoring
COOLANT & CHIP HANDLING
Coolant System: Flood coolant standard
Chip Handling: Chip tray, conveyor (optional)
Thru-spindle coolant: Optional (model dependent)
POWER & AIR REQUIREMENTS
Power Supply: 3-phase industrial
Approx. Power Draw: ~20–30 kVA
Air Pressure Required: ~0.5–0.7 MPa
Pneumatic supply for chuck / turret actuation
YAMA SEIKI GT-300 — GENERAL INFORMATION
Model: YAMA SEIKI GT-300
Machine Type: CNC Horizontal Turning Center (Lathe)
Series: GT Series (medium-capacity two-axis turning)
Manufacturer: Yama Seiki
Designed for precision turning of small to medium parts
Rigid cast-iron slanted bed / boxway construction
Typical CNC Control: FANUC series (industry standard)
2-axis X/Z control with turret tooling
YAMA SEIKI GT-300 — KEY CAPABILITIES
Precision turning with good surface finish
Reliable FANUC CNC control for consistent performance
Strong construction with rigidity for stability
High torque spindle for versatile material cutting
Multi-tool turret supports flexible tooling
Tailstock support (optional) available
INDUSTRIES THAT USE YAMA SEIKI GT-300
Automotive component machining
General engineering parts production
Precision mechanical workshop operations
Small to medium batch CNC machining
Maintenance & repair machining environments
TYPICAL PARTS YAMA SEIKI GT-300 CAN PRODUCE
Shafts, pins, and studs
Flanges and collars
Threaded components
Bushings and spacers
Medium-sized turned prototypes
Fixtures and machined housings
WHY CHOOSE THE YAMA SEIKI GT-300
Well-balanced performance for small / mid-range parts
FANUC control — familiar CNC interface
Rigid build for vibration damping and accuracy
Turret tooling flexibility
Available tailstock for longer parts
Good used value and support
Summary Table
PARAMETER
VALUE
Max Turning Diameter
~360–440 mm
Max Turning Length
~700–1,292 mm
Swing Over Bed
~600 mm
Spindle Speed
~3,500 rpm
Spindle Power
~15–25 HP
Tool Capacity
~10–12
X-Axis Travel
~245–275 mm
Z-Axis Travel
~700–1,292 mm
Control
FANUC CNC
How much does used YAMA SEIKI GT-300 cost? Used Machine Price Range (Approximate)
CONFIGURATION
ESTIMATED PRICE (USD)
Base Model (standard GT-300)
$25,000 – $40,000
Mid Spec (coolant, tailstock)
$40,000 – $55,000
High Spec (probe, tooling options)
$55,000+
Prices vary depending on build year, spindle hours, tool count, and installed options.
WHY BUY USED YAMA SEIKI GT-300
Buying a used Yama Seiki GT-300 can provide substantial cost savings while still delivering advanced CNC turning capabilities. Pre-owned machines are ideal for job shops and production facilities looking to expand turning capacity or upgrade older equipment without the high capital investment of new machinery. With proper inspection, refurbishment, and maintenance, a used GT-300 can deliver reliable long-term performance, making it a practical and cost-effective investment for manufacturers focused on maximizing productivity and return on capital.
