K11 Series 3-Jaw Self-Centering Manual Chuck

K11 Series 3-Jaw Self-Centering Manual Chuck

Classic 3-jaw self-centering manual chuck with reversible jaws, fast automatic centering, widely used for general workpiece clamping on conventional lathes, milling machines and drilling machines.
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Description

K11 series 3-jaw self-centering manual chucks are manufactured from high-strength cast iron with overall precision machining and heat treatment, the most widely used general-purpose workholding tool for metalworking.
  1. 3-jaw synchronous self-centering design automatically centers round and hexagonal workpieces, ensuring uniform clamping force distribution and high centering accuracy ≤0.03mm.
  2. Reversible jaw design provides both internal and external clamping capabilities, covering a wide range of workpiece diameters.
  3. High-strength cast iron body delivers excellent rigidity and vibration damping performance, suitable for light to medium-duty cutting operations.
  4. Hardened jaws and guideways offer superior wear resistance and long service life.
  5. Standard A-type flange mounting dimensions compatible with A15/A16/A18/A11 series lathe spindles, easy to install and maintain.
  6. Complete set includes chuck body, three reversible jaws, chuck key and mounting bolts for immediate use.

Complete Specification Table (Unit: mm)

MODEL D D1 D2 D3 D4 D5 H1 h h1 h2 d1 z-d Price
K11-200/A15 K11-200A/A15 200 82.563 61.9 40 133 82.6 93 14.288 12 6.5 16.3 3-M10
K11-250/A15 K11-250A/A15 250 82.563 61.9 40 133 133.4 104 14.288 12 6.5 16.3 3-M10
K11-250/A16 K11-250A/A16 250 106.375 82.6 55 165 171.4 104 15.875 13 6.5 19.5 6-M12
K11-315/A16 K11-315A/A16 315 106.375 82.6 55 165 171.4 114 15.875 13 6.5 19.5 6-M12
K11-315/A18 K11-315A/A18 315 139.719 111.1 78 210 235 116 17.462 14 8 24.2 6-M16
K11-320/A16 K11-320A/A16 320 106.375 82.6 55 165 235 114 15.875 13 6.5 19.5 6-M12
K11-320/A18 K11-320A/A18 320 139.719 111.1 78 210 330.2 116 17.462 14 8 24.2 6-M16
K11-325/A18 K11-25A A18 325 139.719 111.1 78 210 463.6 116 17.462 14 8 24.2 6-M16
K11-380/A18 K11-380A/A18 380 139.719 111.1 78 210 330.2 128 17.462 14 8 24.2 6-M16
K11-400/A18 K11-400A/A18 400 139.719 111.1 78 210 463.6 128 17.462 14 8 24.2 6-M16
K11-500/A11 K11-500A/A11 500 196.869 165.1 125 280 235 145 19.050 16 10 29.4 6-M20
K11-500/A15 K11-500A/A115 500 285.775 247.6 200 380 330.2 145 20.638 17 10 35.7 6-M24

Parameter Explanation

  • D : Overall outer diameter of the chuck body
  • D1/D2/D3/D4/D5/H1/h/h1/h2/d1 : Overall and mounting dimensions (unit: mm), corresponding to the engineering drawing
  • z-d : Number and specification of mounting bolts
  • Model Naming :
    • K11: Standard 3-jaw self-centering manual chuck series
    • The number after K11 indicates the chuck diameter (e.g., K11-200 = 200mm diameter chuck)
    • A: A-type flange mounting standard
    • The last number indicates the matching spindle size
    • A suffix: Short body version

Applications

CNC Machining

Ideal for CNC lathe, milling and machining center operations, ensuring high-precision dimensional control and reliable tool holding for mass production.

Quality Control Labs

Suitable for quality inspection departments and calibration labs, providing accurate measurement data to verify product compliance with ISO and industry standards.

Mold & Die Making

Perfect for mold and die workshops, where micron-level precision tools and gauges are essential for complex cavity machining and final inspection.

OEM/ODM Projects

Customizable solutions for OEM and ODM manufacturing partners, offering tailored measuring tools and CNC accessories to meet unique production requirements.

Automotive Manufacturing

Designed for automotive component production lines, ensuring consistent precision and durability in engine parts, transmission components and assembly processes.

Aerospace & Precision Engineering

Ideal for aerospace and defense manufacturing, where ultra-high precision instruments and reliable tool holders meet strict quality and safety requirements.

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