K72 Series 4-Jaw Independent Manual Chuck (D-Type Flange Mounting)

High-precision 4-jaw independent manual chuck with D-type pull-stud quick-mount flange, enables ultra-fast chuck replacement, ideal for clamping irregular, square and eccentric workpieces on conventional lathes.

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Description

K72 series 4-jaw independent manual chucks with D-type flange are manufactured from high-strength cast iron with overall precision machining and heat treatment, providing efficient and reliable workholding solutions for conventional lathes, milling machines and boring machines.

D-type pull-stud quick-mount flange design enables one-person fast chuck installation and replacement, significantly reducing downtime for workpiece changeover and tooling setup.
4-jaw independent adjustment design can clamp round, square, rectangular, eccentric and various irregular-shaped workpieces, with a wide range of applications.
High-precision machining ensures chuck end runout and radial runout ≤0.02mm, guaranteeing excellent machining accuracy and surface finish.
High-strength cast iron body provides exceptional rigidity and vibration damping, capable of withstanding heavy cutting loads.
Hardened jaws and guideways offer superior wear resistance and long service life.
Standard D-type flange dimensions compatible with D4/D6/D8/D11/D15 series lathe spindles, easy to install and maintain.
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	z-d
K₇₂200/D4	63.513	82.6	56	107	75	13	10	3-M10×1
K₇₂250/D4	63.513	82.6	61	120	80	—	10	3-M10×1
K₇₂320/D4	63.513	82.6	61	138	90	—	10	3-M10×1
K₇₂250/D6	106.375	133.4	75	120	80	16	13	6-M16×1.5
K₇₂320/D6	106.375	133.4	95	138	90	16	13	6-M16×1.5
K₇₂400/D6	106.375	133.4	95	143	95	16	13	6-M16×1.5
K72500/D6	106.375	133.4	103	160	105	—	13	6-M16×1.5
K₇₂320/D8	139.719	171.4	95	138	90	18	14	6-M20×1.5
K₇₂400/D8	139.719	171.4	125	143	95	18	14	6-M20×1.5
K₇₂500/D8	139.719	171.4	136	160	105	—	14	6-M20×1.5
K₇₂400/D11	196.869	235	125	143	95	20	16	6-M22×1.5
K₇₂500/D11	196.869	235	160	160	105	20	16	6-M22×1.5
K₇₂630/D11	196.869	235	180	180	115	20	16	6-M22×1.5
K₇₂500/D15	285.775	330.2	160	160	105	21	17	6-M24×1.5
K₇₂630/D15	285.775	330.2	180	180	115	21	17	6-M24×1.5

Parameter Explanation

D1/D2/D3/H/H1/h/hi : Overall and mounting dimensions (unit: mm), corresponding to the engineering drawing
z-d : Number and specification of pull-stud mounting bolts
Model Naming :
- K72: Standard 4-jaw independent manual chuck series
- The number after K72 indicates the chuck diameter (e.g., K72200 = 200mm diameter chuck)
- D: D-type pull-stud quick-mount flange 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.