The Reliable Brother C400K is a slant-bed CNC lathe with high precision and quality and good economy.
Technology Upgrade Highlights:
- 1. High-precision servo-driven tool holder
An international horizontal hydraulic servo turret tool holder (domestic preferred/imported configuration) is selected to achieve ±0.005mm positioning accuracy, tool change response time <0.8s, and structural deformation under heavy cutting conditions ≤0.01mm/m (ISO 10791-2 standard verification).
- 2. Precision linear guide assembly
Equipped with a Taiwan brand linear guide, friction coefficient <0.002, temperature rise ≤3℃ at high speed feeding (24m/min), ensuring the stability of machining accuracy (continuous 72 hours cutting test error <5μm).
- 3. Fully enclosed protection system
Integrated sheet metal protection (3mm cold-rolled steel plate), operating noise ≤ 75dB (A), three-proof (waterproof/oilproof/dustproof) grade up to IP54, safety interlocking mechanism through the CE Machinery Directive certification.
- 4. Industrial-grade sealed electronic control systemThe protection level of the electric cabinet is IP55, equipped with an independent refrigeration unit as standard (temperature control precision ±1℃), ensuring the trouble-free operation of the numerical control system under the extreme environment of 45℃/95%RH for ≥5000 hours (IEC 60068-2-30 test).
- 5. Intelligent chip removal system
Modular chain plate chip removal device (optional), chip removal efficiency ≥100kg/h, with overload automatic reversal protection, blocking material alarm function, compact design saves 20% of occupied space (compared with traditional structure).
Core technology upgrade analysis:
- High rigidity spindle system
By adopting a P4 grade double-row precision angular contact bearing set, the axial rigidity is increased by 30%, and the precision attenuation is small under heavy cutting conditions.
2.45°Integrated slant bed structure
After three artificial aging treatments (450℃×6h annealing process), the bed has excellent torsional rigidity and stable batch processing.
- Lightweight enhanced structure
Topology-optimised round cavity casting achieves a 33% increase in flexural rigidity.
- Intelligent thermal management system
Hydrodynamically optimised heat dissipation duct (ANSYS CFX simulation), spindle box temperature rise is controlled within Δ15℃ (ISO 230-3 test conditions), and the temperature drift is <8μm for 8 hours of continuous operation.
- Precision motion components
The integral drag plate adopts standard processing, and the cumulative error of assembly is <±0.005mm (detected by laser interferometer), which meets the requirement of dynamic precision.
Reliable Brother C400K Classic CNC Slant Bed Lathe Detail Showcase

The control system can be changed to other brands as needed, such as Fanuc, Siemens, Xindai, Quanta, etc.








- Reliable Brother C400K/C400KL Technical Parameters
CONFIGURATION | C400K | C400K-L | |
Machining Capacity |
Max. Swing Over Bed           mm | φ500 | φ500 |
Max.Swing Over Slide           mm | φ250 | φ320 | |
Max.Processing Length         mm | 450 | 1000 | |
Max.Turning Diameter          mm | φ320 | φ320 | |
Max.Diameter of Bar           mm | φ50 | φ74 | |
Spindle |
Spindle Type | Servo | Servo |
Spindle Head Type            GB59001 | A2-6 | A2-8 | |
Spindle Taper Hole             mm | φ62 | φ86 | |
Spindle Speed Range            r/min | 50-3000 | 50-2500 | |
Spindle Output Torque         N ·m | Rated 110, Max. 150 | Rated 110, Max. 150 | |
Spindle Power                 KW | 11 | 11 | |
ChuckType | Hydraulic Through Chuck | Hydraulic Through Chuck | |
Chuck Size                    Inch | 8″/10″ | 8″/10″ | |
Feed Rate |
Rapid Traverse Speed on X-axis m/min | 25 | 25 |
Rapid Traverse Speed on Z-axis m/min | 25 | 25 | |
Servo Motor Torque on X-axis  N ·m | 7.5 | 7.5 | |
Servo Motor TorqueonZ-axis   N ·m | 7.5 | 7.5 | |
X-axis Travel                 mm | 200 | 200 | |
Z-axis Travel                 mm | 500 | 1100 | |
Guideway Type | Roller Linear Guideway | Roller Linear Guideway | |
Turret |
Turret Type | HydraulicServo 8/12 Post | Hydraulic Servo 8/12 Post |
Number of Tool Holders      Pc(s) | 1U,2 Boring,1 Face | 1U,2 Boring,1 Face | |
Tool Size                    mm | 25×25/φ32 | 25×25/φ32 | |
Tailstock |
Tailstock Type | Hydraulic | Hydraulic |
Tailstock Sleeve Diameter     mm | ä¸88 | φ88 | |
Tailstock Travel              mm | 80 | 80 | |
Tailstock Sleeve Taper | Mt5 | MT5 | |
Power Source | Rated Total Power            kW | 18 | 18 |
Rated Total Current          A | 35 | 35 | |
Dimension | Machine Weight             kg | 3500 | 4500 |
Machine Size             LxW×H(mm) | 2620×1880×1870 | 3598×1930×2025 | |
Other | Optional | Chip conveyor | Chip conveyor |
Build-in Spindle (Optional) |
Spindle Type | Built-in Spindle | |
Spindle Head Type | A2-6 | ||
Spindle Taper Hole          mm | 62 | ||
Spindle Speed Range         r/min | 60-4000 | ||
Spindle Power               KW | 17 |