CNC Oil Country Lathe Spindle Bore Diameter 225mm (CNC Pipe Lathe Qk1322)
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September 08 09:38:39, 2025
The QK1322 CNC lathe is a high-performance metal-cutting machine designed for precision machining of pipes and other cylindrical workpieces. It is equipped with a FANUC 0i mate CNC control system and a full-digital AC servo system, ensuring accurate and efficient operation. This machine is ideal for both general-purpose and specialized turning applications.
**Key Features:**
- **Model No.:** QK1322
- **Process Usage:** Metal-Cutting CNC Machine Tools
- **Control Method:** Closed-Loop Control
- **Performance Classification:** High-End CNC Machine Tools
- **Condition:** New
- **Swing Over Bed:** 630mm
- **Certifications:** CE, ISO9001, RoHS
- **HS Code:** 84592900
- **Application:** Metal
- **Movement Method:** Contour Control
- **Numerical Control:** CNC/MNC
- **Spindle Bore:** 225mm
- **Trademark:** L&T
- **Origin:** Tengzhou, China
**General Description:**
The QK1322 is widely used for turning the ends of various types of pipes. It combines the functionality of a general-purpose lathe with advanced CNC technology. The machine features a robust construction made from high-strength HT-250 grey cast iron, which has undergone multiple aging treatments to ensure long-term stability and accuracy.
**Main Components:**
- **Machine Base:** Constructed from one-piece casting, the base includes the headstock frame, carriage case, cross slide, and tool post. These components are treated with natural aging for over six months to reduce internal stress and maintain precision.
- **Bed Ways:** The guide ways are processed using supersonic frequency induction quenching and precision grinding. PTFE anti-abrasion belts are applied to reduce friction and improve the longevity of the machine.
- **Headstock:** Powered by a 37 kW AC variable frequency motor, the spindle can operate in nine speed steps, ranging from 6 to 205 RPM. The motor is controlled via an AC frequency conversion system.
- **Feeding Movements:** Both X-axis (cross feeding) and Z-axis (longitudinal feeding) are driven by independent AC servo motors, enabling smooth and precise movements at variable speeds. The system uses semi-closed loop control with encoders for enhanced accuracy.
- **NC Turret:** Equipped with a 4-station NC turret, this machine offers high repeatability (0.005 mm) and reliable swivel performance.
- **Tailstock:** Designed for high rigidity and ease of use, the tailstock features an internal center and a quill diameter of 140 mm, ensuring excellent rotational accuracy.
- **Cooling System:** A dedicated coolant reservoir is located beneath the machine, providing continuous coolant flow to the cutting area for improved machining conditions.
- **Lubrication System:** A central automatic lubrication device ensures regular lubrication of the ball screw pairs and bed ways, enhancing the machine’s lifespan.
- **Hydraulic System:** The hydraulic system supports the headstock and gear shifting mechanism, with components sourced from Taiwan for reliability and easy maintenance.
- **Auxiliary Supporting:** Optional auxiliary devices are available to enhance the machine’s versatility.
**Machine Performance Accuracy:**
- Positioning Accuracy (X-Axis): 0.03 mm / 1000 mm
- Positioning Accuracy (Z-Axis): 0.04 mm / 1000 mm
- Repeatability (X-Axis): 0.012 mm
- Repeatability (Z-Axis): 0.016 mm
- Dimension Tolerance: IT7 Grade
- Surface Roughness (Finish Cylindrical Turning): Ra3.2 μm
- Roundness (Finish Cylindrical Turning): 0.02 mm
- Cylindricity (Finish Cylindrical Turning): 0.025 mm / 300 mm
- Flatness (Finish Face Turning): 0.025 mm / 300 mm
- Thread Pitch Tolerance: 0.015 mm / 60 mm
**Technical Specifications:**
| Model | QK1322 |
|-------|--------|
| Bed Width | 550 mm |
| Turning Diameter over Bed (Max.) | 630 mm |
| Max. Diameter of Pipe (Manual Chuck) | 219 mm |
| Turning Length (Max.) | 1500 mm |
| Spindle Bore | 225 mm |
| Spindle Speed Steps | 12 Steps |
| Range of Spindle Speed | 24–300 rpm |
| Tool Post | Vertical 4-Position |
| Indexing Time (s) | 3 s |
| Main Motor (kW) | 7.5 kW |
This machine is well-suited for a wide range of industrial applications, offering precision, durability, and ease of operation. Its advanced design makes it a reliable choice for manufacturers looking to enhance productivity and quality in their machining processes.
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