NSK Cartridge Spindle For Machining Centers

Types and Features

•  High-rigidity G series (G-40V、 G-45V, G-50V)

High radial rigidity is achieved with a double-row cylindrical roller bearing incorporated in the fixed side. The application of a high-speed angular contact ball bearing with a contact angle of 30° for thrust load provides axial rigidity with high-speed operation. The double-row cylindrical roller bearing integrated in the free side provides a large load capacity and ensures smooth axial movement against shaft elongation caused by rising temperatures.

•  High-speed H series (H-30V, H-40V)

A high-speed angular contact ball bearing with a contact angle of 15° is integrated in the fixed side. Although mainly used for high-speed operation, these bearings are also applicable to normal cutting at medium or low speeds since their quadruple configuration maintains rigidity. The free side incorporates a double-row cylindrical roller bearing, as in the high-rigidity series.


High-Rigidity G Series

											National taper	Max. rot. speed (min−1)		Runout accuracy (μm) max.			Average power consumption (kW)	Pulley groove	Rigidity (N/μm) (reference)		Allowable static axial load (N)	Spindle weight (approx.) (kg)	Tool clamp force (N)	Tool unclamp force (N)	Tool clamp type
												Rev. speed	dm n max	Taper	Base of test	End of 300 test bar			Axial	Radial (point A)
G-40V (H)											40	8000	62x104	2	3	8	5.5	5MS-7	275	245	25500	40	6870	8830	Ball chuck
G-50V (H)											50	4000	58x104				11	7MS-6	520	500	80400	140	14700	26500	Collet chuck

	Shaft dia. d	NT Large d1	d2	d3	d4	d5	C1	C2	C3	P	PA	D	D1	D2	D3	M	M1	M2	M3	M4	M5	l	l1	I2	l3	l4	l5	l6	l7	l8	l9	l10	l11
G-40V (H)	65	44.5	76	60	55	90	44	40	35.4	76	10.5	140	140	162	185	50	M50 × 1.5	11	17.5	15.9	14	480	124	24	184	138	27	57	31	23	19	11	8
G-50V (H)	110	69.85	130	98	100	137	48	43	34	130	12.5	220	220	250	280	95	M95 × 2.0	16	23	25.4	26	700	152	35	270	225	33	75	87	30	18	15.2	12.5

High-Speed H Series

											National taper	Max. rot. speed (min−1)		Runout accuracy (μm) max.			Average power consumption (kW)	Pulley groove	Rigidity (N/μm) (reference)		Allowable static axial load (N)	Spindle weight (approx.) (kg)	Tool clamp force (N)	Tool unclamp force (N)	Tool clamp type
												Rev. speed	dm n max	Taper	Base of test	End of 300 test bar			Axial	Radial (point A)
H-30V (H)											30	12000	78x104	2	3	8	3.75	5MS-4	128	98	9800	28	3920	5100	Ball chuck
H-40V (H)											40	10000	82x104				5.5	5MS-7	167	137	12700	40	6870	8830	Ball chuck

 

	Shaft dia. d	NT Large d1	d2	d3	d4	d5	C1	C2	C3	P	PA	D	D1	D2	D3	M	M1	M2	M3	M4	M5	l	l1	I2	l3	l4	l5	l6	l7	l8	l9	l10	l11
H-30V (H)	50	31.75	57	44	45	74	34.5	32.5	27.5	64	11.5	120	120	140	160	43	M42 × 1.5	9	14	15.9	11	390	111	20	146	106	25	41	22	18	7	8.6	8
H-40V (H)	65	44.45	76	60	55	90	44	40	35.4	76	10.5	140	140	162	185	50	M50 × 1.5	11	17.5	15.9	14	480	124	24	184	138	27	57	31	23	10	11	8