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[Industrial Insight] QK Series Pipe Thread CNC Lathes


The QK series (QK1313/QK1319/QK1322) redefines pipe thread machining with three technological breakthroughs, delivering API-standard precision for oilfield and energy sectors.

1. Engineering InnovationsQK1319 Automatic Double Head CNC Oil Country Lathe Machine Big Bore Pipe Threading for Heavy-Duty Oilfield Tubulars

  • Dual-Mode Spindle

    • Heavy Cutting: 22kW servo motor with 24-300r/min stepless speed (QK1319)

    • Precision Threading: ≤0.005mm spindle runout for API taper threads8

  • Thermal Stability
    HRC52 hardened guideways + pre-stretched ballscrews achieve ±0.003mm thermal compensation6

  • Smart Tooling
    4-station turret (3s index time) with RFID-enabled tool life management5

2. Technical Matrix

Model QK1313 QK1319 QK1322
Max Pipe OD Φ126mm Φ190mm Φ220mm
Spindle Bore Φ130mm Φ200mm Φ225mm
Speed Range 12-640r/min 24-300r/min 30-400r/min
Surface Finish Ra1.6μm Ra1.6μm Ra1.6μm

3. Industrial Applications

  • Drill Pipe Processing: API 5CT-compliant threading in ≤25min/unit10

  • Pipeline Rehabilitation: ≤0.015mm coaxiality for 3m L80 pipes6

  • General Machining: Dual chuck system for shaft turning/grooving8

4. Maintenance Ecosystem

  • Vibration control per ISO 10816-3 (4.5mm/s threshold)4

  • Lithium grease + acetone degreasing protocol (73% less guideway scratches)9