3N

Non-Thru-Hole

Inclined Master Jaws Power Chuck

Non-Thru-Hole | 3-JAW

The AUTOGRIP 3N Series features specialized inclined master jaw guideways that generate an axial pull-back force during clamping. This design eliminates workpiece lifting, ensuring superior clamping accuracy, perpendicularity, and squareness. Engineered specifically for external clamping applications, it accommodates standard soft jaws to reduce operational costs and fixture investment.

Key Features:

Axial Pull-Back Action: Inclined guideways pull the workpiece tight against the reference face, eliminating workpiece lifting during clamping.
Standard Soft Jaw Compatible: Works seamlessly with standard soft jaws—no expensive custom jaws required.
External Clamping Specialized: Engineered strictly for OD clamping with optimized structural rigidity.
Airtight pressure detect (Optional): Optional air detection mechanism ensures full seating contact, perfect for automated production lines.

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Specifications

Model	Plunger stroke (mm)	Jaw stroke (Dia.) (mm)	Chucking Dia. Max. (mm)	Chucking Dia. Min. (mm)	Max. D.B. pull kN (kgf)	Max. clamping force kN (kgf)	Max. speed min^-1 (r.p.m.)	I kg‧m ²	Weight (kg)	Matching cyl.	Max. pressure MPa (kgf/cm²)
3N-06	20	8.1(Axial0.9)	165	14	18 (1835)	61.5 (6270)	5000	0.05	11.1	RK-100(N)	2.6(26)
3N-08	23	9.4(Axial1.0)	210	17	25 (2540)	85.8 (8750)	4500	0.14	24.5	RK-125(N)	2.2(22)
3N-10	25	10.2(Axial1.1)	254	22	29 (2950)	108 (11000)	4000	0.32	34.5	RK-150(N)	1.8(18)

Dimensions

Model	A	B	C(H6)	D	E	G max.	G max.	H	J	K max.	L	L1	M	N	P	Q max.	Q min.	R max.	R min.	S	T	U
3N-06	165	72	140	104.8	5	54.5	34.5	36	34	M16x2	M10	16	41	73	20	15.25	7.75	38.3	34.25	31	12	M6
3N-08	210	85	170	133.4	5	59	36	36	38	M20x2.5	M12	20	42	95	25	22.25	11.75	46.3	41.6	35	14	M6
3N-10	254	89	220	171.4	5	63	38	36	45	M20x2.5	M16	24	47	110	30	33.75	11.25	52.1	47	40	16	M8