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Ball Spline is a precision mechanical transmission element suitable for applications requiring high precision, high rigidity, high speed and large loads, especially for round-trip and rotary movements.

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Ballsplines

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Single-outlet spline shaft model

Nominal model	Shaft diameter	Ball row	Spline bearing sleeve
	d		D	L	A	B	E	H	W	Mounting holes
	h7		D	L	A	B	E	H	W	X
SOF008	8	2	15	25	28	3.8	5.2	22	22	3.4
SOF010	10	2	19	30	36	4.1	5.9	28	28	4.5
SOF012	12	2	21	35	38	4	6	30	30	4.5
SOF015	13.6	2	23	40	40	4.5	6.5	31	32	4.5
SOF020	18.2	2	30	50	46	5.5	8.5	35	38	4.5
SOF025	22.6	2	37	60	57	6.6	10.4	43	47	5.5

Nominal model	Basic load rating		Basic rated torque		Allowable static moment		Weight
	C	C₀	C_T	C_OT	M_A1	M_A2	Spline outer cylinderv	Spline shaft
	kgf	kgf	kgf.m	kgf.m	kgf.m	kgf.m	g	kg/m
SOF008	121	136	0.56	0.63	0.34	2.24	23.5	0.39
SOF010	192	219	1.11	1.27	0.71	4.23	45	0.61
SOF012	222	274	1.51	1.87	1.08	6.02	59	0.88
SOF015	426	619	3.19	4.65	2.83	15.49	77	1.11
SOF020	673	922	6.73	9.22	4.95	29.36	150	2.02
SOF025	1142	1458	14.17	18.14	9.46	56.17	255	3.10

Nominal model	Shaft diameter	Ball row	Spline bearing sleeve				Keyway size
	d		D	L	S	L1	b	t
	h7		D	L	S	L1	H8	+0.05 0
SOT008	8	2	15	25	14.6	8.5	2.5	1.5
SOT010	10	2	19	30	18.2	11	3	1.8
SOT012	12	2	21	35	23	15	3	1.8
SOT015	13.6	2	23	40	27	20	3.5	2
SOT020	18.2	2	30	50	33	26	4	2.5
SOT025	22.6	2	37	60	39.2	29	5	3

Nominal model	Basic load rating		Basic rated torque		Allowable static moment		Weight
	C	C₀	C_T	C_OT	M_A1	M_A2	Spline outer cylinderv	Spline shaft
	kgf	kgf	kgf.m	kgf.m	kgf.m	kgf.m	g	kg/m
SOT008	121	136	0.56	0.63	0.34	2.24	15.9	0.39
SOT010	192	219	1.11	1.27	0.71	4.23	31.5	0.61
SOT012	222	274	1.51	1.87	1.08	6.02	44	0.88
SOT015	426	619	3.19	4.65	2.83	15.49	59.5	1.11
SOT020	673	922	6.73	9.22	4.95	29.36	130	2.02
SOT025	1142	1458	14.17	18.14	9.46	56.17	220	3.10

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Series Motion Industry Co., Ltd.

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SO SERIES

Single-outlet spline shaft model

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