JN Series 3-Jaw Hollow Through-Hole Hydraulic Power Chuck

High-precision 3-jaw hollow hydraulic chuck with large through-hole, high clamping force and speed, ideal for CNC lathe bar feeding and turning operations.

High Precision

ISO/CE Certified

Industrial Durability

OEM/ODM Support

Fast Global Delivery

Professional After-Sales

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Lathe chuck

Products

Description

JN series 3-jaw hollow hydraulic power chucks are manufactured from high-strength alloy steel with overall quenching and precision grinding, designed for high-efficiency turning operations on CNC lathes.

Large hollow through-hole structure allows long bar stock to pass through, perfect for continuous bar feeding machining.
Optimized wedge mechanism provides stable and powerful clamping force, ensuring reliable holding during heavy-duty cutting.
High runout accuracy ≤0.01mm, delivering excellent machining precision and surface finish.
Hardened jaws and guideways for long service life and wear resistance.
Compatible with standard hydraulic cylinders, easy to install and maintain.

Complete Specification Table (Unit: mm)

Mounting Dimensions

Model	Spindle Nose	A	B	C (H6)	D	E	F	G	H	J	K	L	M
03K05	A2-4	135	72	110	63.513	15	4	96	82.55	33	3-M10	13	14
03K06	A2-5	169	91	140	82.563	15	5	116	104.8	45	6-M10	16	20
03K08	A2-6	210	103	170	106.375	17	5	150	133.4	52	6-M12	18	25
03K10A06	A2-6	254	120	220	106.375	25	5	171.4	133.4	75	6-M16	18.5	30
03K10A08	A2-8	254	113	220	139.718	18	5	190	171.4	75	6-M16	24	30
03K12A06	A2-6	304	129	220	106.375	25	6	171.4	133.4	91	6-M16	18.5	30
03K12A08	A2-8	304	122	220	139.719	18	6	190	171.4	91	6-M16	25	30

Thread & Additional Dimensions

Model	N (max)	N (min)	O (max)	O (min)	P (max)	P (min)	Q	R	S	T	U (max)	V	W	X
03K05	26.5	23.8	19.75	7.75	17	7	25	10	20	2	M40×1.5P	3×M6	31.5	62
03K06	32	29.25	22.75	9.25	26	14	31	12	19	2	M55×2	3×M6	37.5	73
03K08	38.7	35	29.75	14.75	31.5	15.5	35	14	20.5	2	M60×2	6×M6	39	95
03K10A06	51	46.6	33.75	14.25	33.5	14.5	40	16	25	2	M85×2	6×M12	43	110
03K10A08	51	46.6	33.75	14.25	26.5	7.5	40	16	25	2	M85×2	6×M8	43	110
03K12A06	61.3	56	45.75	15.75	33	10	49	21	28	2	M100×2	6×M12	50.5	129
03K12A08	61.3	56	45.75	15.75	26	3	49	21	28	2	M100×2	6×M8	50.5	129

Performance Parameters

Model	Grip Dia (max/min)	Jaw Stroke	Plunger Stroke	Max.pull Force	Max.gripping force	Max.speed	Weight	Matching Cylinder	Max.hydraulic pressure	Operating Jaw
	mm	mm	mm	kgf (KN)	kgf (KN)	r.p.m(min⁻¹)	kg		kg/cm² (Mpa)
03K05	135 /	12	5.4	10	1784 (17.5)	3671 (36)	7000	6.7	TK536	28 (2.9)	HJ-05
03K06	169 /	15	5.5	12	2243 (22)	5812 (57)	6000	13.7	TK646	2.8 (28.6)	HJ-06
03K08	210 /	20	7.4	16	3549 (34.8)	8769 (86)	5000	23.6	TK852	2.65 (27)	HJ-08
03K10A06	254 /	31	8.8	19	4385	11319 (111)	4200	41.5	TK1075	2.7 (27.5)	HJ-10
03K10A08	254 /	34	8.8	19	4385	11319 (111)	4200	40.0	TK1075	2.7 (27.5)	HJ-10
03K12A06	304 /	42	10.6	23	5608	14684 (144)	3300	67.0	TK1291	2.7 (27.5)	HJ-12K
03K12A08	304 /	50	10.6	23	5608	14684 (144)	3300	64.0	TK1291	2.7 (27.5)	HJ-12K

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.