K72 Series 4-Jaw Independent Manual Chuck

K72 Series 4-Jaw Independent Manual Chuck

High-precision 4-jaw independent manual chuck with individual jaw adjustment, ideal for clamping irregular, square and eccentric workpieces on conventional lathes and milling machines.
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Description

K72 series 4-jaw independent manual chucks are manufactured from high-strength cast iron with overall precision machining and heat treatment, providing reliable workholding solutions for conventional lathes, milling machines and boring machines.
  1. 4-jaw independent adjustment design can clamp round, square, rectangular, eccentric and various irregular-shaped workpieces, with a wide range of applications.
  2. High-precision machining ensures chuck end runout and radial runout ≤0.02mm, guaranteeing excellent machining accuracy and surface finish.
  3. High-strength cast iron body provides exceptional rigidity and vibration damping, capable of withstanding heavy cutting loads.
  4. Hardened jaws and guideways offer superior wear resistance and long service life.
  5. Standard mounting dimensions compatible with A2-4/A2-6/A2-8/A2-11/A2-15 series lathe spindles, easy to install.
  6. Simple and reliable structure with low maintenance cost, suitable for various general machining applications.

Complete Specification Table (Unit: mm)

Mounting & Outline Dimensions

MODEL D1 D2 D3 H H1 h hi h2 d1 z-d Price
K₇₂160/A₂-4 63.513 82.6 45 93 65 13 10 6.5 14.7 4-M10
K₇₂200/A₂-4 63.513 82.6 56 107 75 13 10 6.5 14.7 4-M10
K₇₂250/A₂-4 63.513 82.6 61 120 80 13 10 6.5 14.7 4-M10
K₇₂320/A₂-4 63.513 82.6 61 138 90 - 10 6.5 14.7 4-M10
K₇₂200/A₂-6 106.375 133.4 56 107 75 16 13 6.5 19.5 4-M12
K₇₂250/A₂-6 106.375 133.4 75 120 80 16 13 6.5 19.5 4-M12
K₇₂320/A₂-6 106.375 133.4 95 138 90 16 13 6.5 19.5 4-M12
K₇₂400/A₂-6 106.375 133.4 95 143 95 16 13 6.5 19.5 4-M12
K₇₂500/A₂-8 106.375 133.4 103 160 105 - 13 6.5 19.5 4-M12
K₇₂520/A₂-8 139.719 171.4 75 120 80 18 14 8 24.2 4-M16
K₇₂320/A₂-8 139.719 171.4 95 138 90 18 14 8 24.2 4-M16
K₇₂400/A₂-8 139.719 171.4 125 143 95 18 14 8 24.2 4-M16
K₇₂500/A₂-6 139.719 171.4 136 160 105 - 14 8 24.2 4-M16
K₇₂320/A₂-11 196.869 235 95 138 90 20 16 10 29.4 4-M20
K₇₂400/A₂-11 196.869 235 125 143 95 20 16 10 29.4 4-M20
K₇₂520/A₂-11 196.869 235 160 160 105 20 16 10 29.4 4-M20
K₇₂630/A₂-11 196.869 235 180 180 115 20 16 10 29.4 4-M20
K₇₂500/A₂-15 285.775 330.2 160 160 105 21 17 10 35.7 4-M24
K₇₂630/A₂-15 285.775 330.2 180 180 115 21 17 10 35.7 4-M24

Parameter Explanation

  • D1/D2/D3/H/H1/h/hi/h2/d1 : Overall and mounting dimensions (unit: mm), corresponding to the engineering drawing
  • z-d : Number and specification of mounting bolts
  • Model Naming :
    • K72: Standard 4-jaw independent manual chuck series
    • The number after K72 indicates the chuck diameter (e.g., K72160 = 160mm diameter chuck)
    • A₂: Compatible A2 series lathe spindle standard
    • The last number indicates the matching spindle size

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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