Precision Grinding Spindle

Types and Features

SA Type  Quill type spindle for various exchangeable wheel arbors. Can be used for a wide range of applications.
SC Type  Two types available - flat-belt driven spindles for medium-size grinding wheels, and V-belt driven spindles for large-size grinding wheels.
SF Type  Flat-belt driven spindle for cup-type grinding wheels. Incorporates precision bearings with high load capacity.

Runout accuracy: Less than 3 um for all types with outside cylinder diameter of less than 70 mm. Less than 5 um for all types with outside cylinder diameter of 70 mm or greater. (SA Type: Base of test bar. SC and SF Types: End of spindle shaft.)
Spindles for counterclockwise rotation can be manufactured for special orders.

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Selection Criteria

Type of grinding	Type	Suitable applications
Internal grinding	SA	Exchangeable grinding wheel arbor type. Use when grinding various types of holes.
External grinding	SC	Two types - one for use with mediumn-size grinding wheels, one for use with large-size grinding wheels.
Surface grinding	SC	Use when grinding surfaces with the outer circumference of the grinding wheel.
Surface grinding	SF	Use when grinding surfaces with the end face of a cup-type or dish-type grinding wheel.

^{Note: Please select the size suited to the mounting conditions.

Please select the spindle suited to the grinding conditions.}

precision-grinding-spindle-2

Unit: mm

Spindle reference No.	Max. rot. speed(min^-1)	A	B	C	D	E	F	G
SA600	30 000	60	220	48	28	8	11.113	3
SA700	20 000	70	250	69	42	9	17.463	3
SA800	16 000	80	280	73	56	9	20.638	3
SA900	13 500	90	320	84	63	9	23.813	4

Unit: mm

Spindle reference No.	Max. rot. speed(min^-1)	A	B	C	D	E	F	G	H	K	L	M	N
SC5500	6 400	50	180	47	56	65 - 90	9.5 - 13	15.5	41	22.23	50	M14 x 1.5	2
SC6500	5 000	60	220	63	70	75 - 115	13 - 19	17	51	31.75	70	M20 x 1.5	3
SC7500	3 800	70	250	73	90	100 - 150	16 - 25	24	70	38.1	90	M26 x 1.5	3
SC8500	3 200	80	280	83	110	125 - 180	19 - 32	24	80	63.5	115	M30 x 1.5	3

Unit: mm

Spindle reference No.	Max. rot. speed(min^-1)	A	B	C	D	E	F	G	H	K	L	M	N	P
SC5501	5 700	50	180	47	60	65 - 100	9.5 - 13	15.5	41	22.23	50	M14 x 1.5	2	10
SC6501	4 600	60	220	48	80	75 - 125	13 - 19	17	51	31.75	70	M20 x 1.5	3	10
SC7501	3 200	70	250	69	110	150 - 180	16 - 19	24	70	76.2	130	M26 x 1.5	3	10.5
SC8501	2 800	80	280	73	130	150 - 205	19 - 25	24	80	76.2	130	M30 x 1.5	3	10.5

Unit: mm

Spindle reference No.	Max. rot. speed(min^-1)	A	B	C	D	E max.	F	G	H	K	L	M	N	P
SF5500	7 600	50	180	47	48	75	38	13	32	25.4	50	-	7	12
SF6500	6 400	60	220	47	56	90	45	15	35	31.75	60	M22 x 1.5	7	12
SF7500	5 700	70	250	64	63	100	50	15	39	38.1	70	-	9	19
SF8500	5 000	80	280	64	70	115	50	15	39	38.1	80	-	9	23

Unit: mm

Spindle reference No.	A	B	C	D	d	E	F	G	H	P	Z	M ^{Recommended dimensions}
SA600	66	6	50	14	11.113	3	13	3	8	1.25	12	5, 6, 8, 10, 12
SA700	94	8	71	22	17.463	3	20	4	12	1.75	19	5, 6, 8, 10, 12, 14, 16, 18
SA800	105	9	78	25	20.638	4	23	4	14	2	21	6, 8, 10, 12, 14, 16, 18, 21
SA900	118.5	11.5	86.5	30	23.813	6	26	4.5	16	2	26	10, 12, 14, 16, 18, 21, 24

Note: The maximum length L, with respect to the exchangeable grinding wheel arbor neck with outer diameter M, can be determined using the table on the right.

Unit: mm

Neck outside diameter M	5	6	8	19	12	14	16	18	21	24
Screw thread diameter N	3	3	3	4	6	6	6	8	8	8
Maximum length L	30	35	45	50	60	68	72	81	97	108

Speed of SC and SF Type

When motor speed is 3 000 min^-1, motor pulley diameter is Ø 120 and the maximum dimension of the grinding wheel (E) is used, the
ginding speed is approximately 1 800 m/min. If operating conditions deviate from these conditions, please determine the appropriate
pulley diameter to obtain a grinding speed of 1 800 m/min with the grinding wheel diameter used.

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