J76-400LU Gang Type CNC Lathe Machine for Large Bar Turning
The J76-400LU gang type CNC lathe machine is designed for manufacturers that need stronger spindle capacity, stable turning performance, and reliable rough and fine machining for metal parts. With a maximum swing diameter of Ø400 mm, maximum turning diameter of Ø300 mm, maximum turning length of 380 mm, Ø86 mm spindle bore, and Ø72 mm maximum bar material diameter, this machine is suitable for stainless steel, titanium alloy, carbon steel, mold steel, and other industrial materials.
For B2B buyers, spindle bore capacity, machine rigidity, and long-term stability are critical when processing larger bar materials. In real machining environments, weak machine structures may cause vibration, unstable surface finish, machining deviation, and shorter tool life. The J76-400LU solves this problem with a one-piece casting base, slant bed structure, aging treatment process, Taiwan SYNTEC controller, reinforced guide structure, and stable servo feeding system.
As a slant bed CNC lathe, the J76-400LU is suitable for factories that need efficient turning, facing, boring, threading, grooving, and precision metal machining in one machine. It is especially practical for precision parts manufacturers, hydraulic component suppliers, automotive parts suppliers, hardware processing factories, mold component workshops, and CNC turning service providers.
Key Features of the J76-400LU
Ø86 mm Spindle Bore for Large Bar Material
The J76-400LU features a Ø86 mm spindle bore and supports a maximum bar material diameter of Ø72 mm. Compared with smaller spindle bore models, this configuration gives manufacturers greater flexibility when processing larger bar materials, shaft parts, sleeve parts, hydraulic components, and medium-to-large turned components.
The machine uses an A2-8 spindle nose and supports a maximum spindle speed of 2000 r/min, making it suitable for stable turning of larger workpieces.
One-Piece Casting Base and Slant Bed Structure
The machine adopts a one-piece casting base and slant bed design to maintain stable machine performance during long-term production. The integral casting undergoes annealing, vibration aging, and other aging processes to improve long-term stability and extend the machine tool lifespan.
This rigid structure helps reduce vibration, improve cutting stability, and support reliable machining accuracy during both rough and fine machining.
Taiwan SYNTEC CNC Controller
The J76-400LU is equipped with a Taiwan SYNTEC controller, providing stable control response, convenient operation, and reliable programming support for CNC turning production.
The SYNTEC CNC system is suitable for daily industrial machining and helps operators manage turning processes efficiently.
15 kW Spindle Motor with Higher Torque Option
The standard spindle motor power is 15 kW with 143 Nm torque. An optional 15 kW / 192 Nm configuration is available for buyers who need stronger torque output for demanding machining conditions.
This makes the machine practical for machining stainless steel, titanium alloy, carbon steel, mold steel, and other materials that require stable cutting force.
Servo Turret for Multi-Process Turning
The machine supports an 80-12T or 8T servo turret configuration. This helps improve tool changing efficiency and supports multiple machining processes in one setup.
For factories producing different part types, the servo turret improves production flexibility and reduces manual intervention.
Stable Feeding Axis and Linear Guide Structure
The J76-400LU offers a maximum fast travel speed of 24 m/min. The X/Z axis uses C3-grade ball screws and roller linear guides to support stable movement and accurate positioning.
The X-axis maximum travel is 230 mm, and the Z-axis maximum travel is 400 mm, making the machine suitable for medium-to-large turned parts.
Four Locking Functions for Machining Accuracy
The machine is equipped with four locking functions to prevent wobbling and tilting during ejection. This helps improve workpiece stability and ensures machining accuracy during production.
Benefits for B2B Manufacturing Buyers
Larger Bar Processing Capacity
With a Ø86 mm spindle bore and Ø72 mm maximum bar material diameter, the J76-400LU is suitable for buyers who need to process larger bar materials than J46 or J52 series models.
This makes it practical for large shaft parts, sleeves, connectors, hydraulic parts, automotive components, hardware parts, and mechanical components.
Stable Machining for Difficult Materials
The machine is suitable for rough and fine machining of stainless steel, titanium alloy, carbon steel, mold steel, and other metal materials. Its rigid structure, stable spindle system, and slant bed design help support consistent machining performance.
Better Long-Term Stability
The one-piece casting base undergoes annealing, vibration aging, and other aging processes. This helps reduce structural deformation and maintain stable machining accuracy over long-term production.
For batch production workshops, long-term stability helps reduce rework, improve part consistency, and maintain delivery quality.
Flexible CNC System and Automation Options
The standard configuration includes a Taiwan SYNTEC CNC system. FANUC is available as an optional control system. Buyers can also choose optional accessories such as feeding device, chip conveyor, automated robot, oil mist separator, electric spindle, and different clamping options.
This makes the J76-400LU suitable for both standard turning production and automated CNC machining lines.
Reliable Industrial Components
The main configuration includes Taiwan SYNTEC system, Japan YASKAWA or Taiwan SYNTEC servo system, Taiwan PMI or HIWIN C3-grade ball screws, PMI or HIWIN P-class linear guides, Taiwan POSA spindle or Kenturn A2-8 spindle depending on configuration, Schneider electrical components, and a customized hydraulic station.
These components help support stable operation, easier maintenance, and reliable industrial machining performance.
Technical Specifications
Product Model: J76-400LU
Machine Type: Gang Type CNC Lathe Machine
Maximum Swing Diameter Over Lathe: Ø400 mm
Maximum Turning Diameter: Ø300 mm
Maximum Turning Length: 380 mm
Spindle Hydraulic Chuck: 10 inch
Spindle Center Height from Ground: 1080 mm
Spindle Nose: A2-8
Spindle Bore Diameter: Ø86 mm
Maximum Bar Material Diameter: Ø72 mm
Maximum Spindle Speed: 2000 r/min
Spindle Motor Power / Torque: 15 kW / 143 Nm
Optional Spindle Motor Power / Torque: 15 kW / 192 Nm
Servo Turret Model: 80-12T or 8T
Maximum Fast Travel Speed: 24 m/min
X/Z/Y-Axis Motor Power / Torque: YASKAWA 1.3 kW / 8.34 N.m or SYNTEC 1.8 kW / 11.5 N.m
X/Z-Axis C3-Grade Ball Screws: 32 / 32
X/Z-Axis Roller Linear Guides: 35 / 35
X-Axis Maximum Travel: 230 mm
Z-Axis Maximum Travel: 400 mm
Tailstock Travel: 400 mm
Thimble Taper: Morse Taper #5
Machine Net Weight: 3700 kg
Total Machine Power: 18.5 kW
Machine Dimensions: 2300 × 1600 × 1700 mm
Machine Tool Accuracy
X-Axis Repeated Positioning Accuracy: ±0.003
Z-Axis Repeated Positioning Accuracy: ±0.003
Y-Axis Repeated Positioning Accuracy: ±0.004
The accuracy test is performed after a preliminary run of approximately 50 times to reduce cooling and warm-up errors.
Configuration Details
NC System: Taiwan SYNTEC 22TA system with 10.4-inch screen
X/Z-Axis Servo: Japan YASKAWA or Taiwan SYNTEC
X/Z Screws: Taiwan PMI or HIWIN C3-grade ground ball screw with double nut
X/Z Linear Guides: Taiwan PMI or HIWIN P-class ball linear guide with extended carriage
Spindle: Taiwan POSA spindle or customized Jingfusi tail-mounted direct-drive electric spindle; Model 76 typically uses original A2-8 spindle from Kenturn Taiwan
Spindle Motor: Taiwan SYNTEC or Beijing CTB
Servo Turret: Taiwan-made 12-station 80 MYKUN servo turret or customized Jingfusi servo turret
Lubrication System: Japan HERG lubricating oil pump
Electrical Components: German Schneider electrics
Hydraulic Station: Customized hydraulic station
Cast Iron One-Piece Bed: In-house development
System Feature: SYNTEC System G183 face drilling cycle
Optional Configurations
Electric Spindle: Optional
FANUC CNC System: Optional
SYNTEC Feed Axis: Optional
Push-Up Chuck: Optional
Chuck: Optional
Feeding Device: Optional
Chip Conveyor: Optional
Automated Robot: Optional
Oil Mist Separator: Optional
High-Rigidity Programmable Tailstock: Optional
The optional high-rigidity programmable tailstock includes 450 mm tailstock travel, Morse Taper #5, 45 mm linear guides, and hydraulic actuation with displacement sensor for M-code programming.
Application Scenarios
Large Bar Material Turning
With a Ø86 mm spindle bore and Ø72 mm maximum bar material diameter, the J76-400LU is suitable for factories processing larger bar materials and medium-to-large turned parts.
Stainless Steel Parts Machining
The J76-400LU is suitable for stainless steel turning applications that require stable rigidity, reliable spindle torque, and consistent machining accuracy.
Titanium Alloy Component Processing
Titanium alloy machining requires stable cutting force and vibration control. The one-piece casting base, slant bed structure, and reinforced feeding axis help support smoother machining.
Carbon Steel Turning
The machine can be used for carbon steel shafts, sleeves, connectors, threaded components, hardware parts, and other mechanical components.
Mold Steel Machining
The J76-400LU supports rough and fine machining of mold steel materials, making it suitable for mold component suppliers and precision tooling workshops.
Hydraulic and Automotive Components
The larger spindle bore and strong torque make this model suitable for hydraulic parts, automotive components, mechanical connectors, and industrial fittings.
Batch Production Workshops
With stable repeated positioning accuracy, servo turret options, and CNC control, this machine supports batch production of precision turned parts.
How to Choose the J76-400LU for Your Factory
Choose It When You Need Larger Bar Capacity
If your parts require bar material up to Ø72 mm, the J76-400LU is more suitable than smaller spindle bore CNC lathe models.
Choose It When You Need Stronger Spindle Torque
The standard 15 kW / 143 Nm spindle motor and optional 15 kW / 192 Nm configuration make this model suitable for heavier cutting requirements.
Choose It When You Need Stable CNC Turning
The one-piece casting base, slant bed structure, and aging treatment process help support stable rough and fine machining.
Choose It When You Process Difficult Metal Materials
The machine is suitable for stainless steel, titanium alloy, carbon steel, mold steel, and other industrial metals.
Choose It When You Need Flexible Automation Options
If your production requires a feeding device, chip conveyor, automated robot, oil mist separator, or FANUC control system, the J76-400LU offers multiple optional configurations.
Choose It When You Need Medium-to-Large Turning Capacity
The machine supports Ø300 mm maximum turning diameter and 380 mm maximum turning length, making it suitable for medium-to-large turned parts.
FAQ
Q1: What is the J76-400LU mainly used for?
The J76-400LU is mainly used for CNC turning, rough machining, fine machining, boring, threading, grooving, and precision metal parts processing.
Q2: What materials can the J76-400LU process?
It is suitable for stainless steel, titanium alloy, carbon steel, mold steel, and other metal materials.
Q3: What is the maximum bar material diameter?
The machine supports a maximum bar material diameter of Ø72 mm.
Q4: What is the spindle bore diameter?
The spindle bore diameter is Ø86 mm.
Q5: What CNC system does the machine use?
The standard configuration uses a Taiwan SYNTEC CNC system. FANUC is available as an optional configuration.
Q6: What is the maximum spindle speed?
The maximum spindle speed is 2000 r/min.
Q7: Does the machine support automation equipment?
Yes. Optional equipment includes feeding device, chip conveyor, automated robot, oil mist separator, and other auxiliary equipment.
Q8: What is the machine accuracy?
The X-axis and Z-axis repeated positioning accuracy is ±0.003, and the Y-axis repeated positioning accuracy is ±0.004.
Q9: Can the machine be equipped with a programmable tailstock?
Yes. An optional high-rigidity programmable tailstock is available with hydraulic actuation and displacement sensor M-code programming.
Q10: What is the difference between J76-400LU and smaller J46/J52 models?
Compared with smaller J46 and J52 models, the J76-400LU provides a larger Ø86 mm spindle bore, Ø72 mm bar capacity, Ø300 mm maximum turning diameter, and stronger spindle torque for larger bar material processing.
