SFF [SS] Type | Miki Pulley

Based on the specifications and dimensions of servo motors used for feed shafts—including permissible torque and compatible shaft diameters—we configure our products to provide the best match for the latest servo motors from various manufacturers. Our lineup includes models featuring a clamp-type design for easy assembly and a wedge-type design for high reliability. The permissible torque significantly exceeds that of conventional products. This is a high-rigidity single-element type.

[Specifications] Clamp-type fastening

Model	Rated torque [N·m]	Tolerance			Maximum rotational speed [min^⁻¹]	Torsional spring constant [N·m/rad]	Axial spring constant [N/mm]	Moment of inertia [kg·m²]	Mass [kg]	Price [JPY]
Model	Rated torque [N·m]	Eccentricity [mm]	Angular offset [°]	Axial [mm]	Maximum rotational speed [min^⁻¹]	Torsional spring constant [N·m/rad]	Axial spring constant [N/mm]	Moment of inertia [kg·m²]	Mass [kg]	Price [JPY]
SFF-040SS-□B-□B-8N	8	0.02	1	±0.2	18,000	15,000	174	0.03×10⁻³	0.17	13,980
SFF-040SS-□B-□B-12N	12	0.02	1	±0.2	18,000	15,000	174	0.03×10⁻³	0.17	13,980
SFF-050SS-□B-□B-25N	25	0.02	1	±0.3	18,000	32,000	145	0.10×10⁻³	0.36	16,520
SFF-060SS-□B-□B-60N	60	0.02	1	±0.3	18,000	104,000	399	0.22×10⁻³	0.52	19,060
SFF-060SS-□B-□B-80N	80	0.02	1	±0.3	18,000	104,000	399	0.23×10⁻³	0.49	19,060
SFF-070SS-□B-□B-90N	90	0.02	1	±0.5	18,000	240,000	484	0.40×10⁻³	0.72	22,500
SFF-070SS-□B-□B-100N	100	0.02	1	±0.5	18,000	240,000	484	0.42×10⁻³	0.67	22,500
SFF-080SS-□B-□B-150N	150	0.02	1	±0.5	17,000	120,000	96	0.79×10⁻³	1.04	25,040
SFF-080SS-□B-□B-200N	200	0.02	1	±0.5	17,000	310,000	546	1.25×10⁻³	1.40	28,080
SFF-090SS-□B-□B-250N	250	0.02	1	±0.6	15,000	520,000	321	1.54×10⁻³	1.62	31,250
SFF-090SS-□B-□B-300N	300	0.02	1	±0.6	15,000	520,000	321	1.58×10⁻³	1.53	31,250
SFF-100SS-□B-□B-450N	450	0.02	1	±0.65	13,000	740,000	540	3.27×10⁻³	2.53	35,070
SFF-120SS-□B-□B-600N	600	0.02	1	±0.8	11000	970,000	360	6.90×10⁻³	3.78	39,390

The maximum rotational speed does not take dynamic balance into account.
The torsional spring constant value refers to the value for a single element.
The moment of inertia and mass are given for the maximum bore diameter.

[Dimensions] Clamp-type

三木プーリのサーボフレックスシリーズSFFモデルSSタイプ（クランプ締結仕様）金属板ばねカップリング寸法図取付寸法および軸径寸法を示す寸法図

Model	d1 [mm]	d2 [mm]	D [mm]	L [mm]	N1・N2 [mm]	LF [mm]	S [mm]	K [mm]	M1・M2 Quantity - Nominal	M1・M2 Tightening Torque [N·m]
Model	d1 [mm]	d2 [mm]	D [mm]	L [mm]	N1・N2 [mm]	LF [mm]	S [mm]	K [mm]	M1・M2 Quantity - Nominal	M1・M2 Tightening Torque [N·m]
SFF-040SS-□B-□B-8N	8, 9, 9.525	8, 9, 9.5, 25, 10, 11, 12, 14, 15, 16	38	38.9	33	17.5	3.9	17	2-M4	3.4
SFF-040SS-□B-□B-12N	10, 11, 12, 14, 15, 16	10, 11, 12, 14, 15, 16	38	38.9	33	17.5	3.9	17	2-M4	3.4
SFF-050SS-□B-□B-25N	10, 11, 12, 14, 15, 16, 17, 18, 19	10, 11, 12, 14, 15, 16, 17, 18, 19	48	48.4	42	21.5	5.4	20	2-M5	7
SFF-060SS-□B-□B-60N	12, 14, 15, 16, 17, 18, 19	12, 14, 15, 16, 17, 18, 19, 20, 22	58	53.4	44	24	5.4	32	2-M6	14
	-	24, 25, 28	58	53.4	48	24	5.4	32	2-M5	7
	-	30	58	53.4	52	24	5.4	32	2-M5	7
SFF-060SS-□B-□B-80N	20･22	20/22	58	53.4	44	24	5.4	32	2-M6	14
	24, 25, 28	24, 25, 28	58	53.4	48	24	5.4	32	2-M5	7
	30	30	58	53.4	52	24	5.4	32	2-M5	7
SFF-070SS-□B-□B-90N	18･19	18, 19, 20, 22, 24, 25	68	55.9	47	25	5.9	38	2-M6	14
SFF-070SS-□B-□B-90N	-	28, 30, 32, 35	68	55.9	56	25	5.9	38	2-M6	14
SFF-070SS-□B-□B-100N	20, 22, 24, 25	20, 22, 24, 25	68	55.9	47	25	5.9	38	2-M6	14
SFF-070SS-□B-□B-100N	28, 30, 32, 35	28, 30, 32, 35	68	55.9	56	25	5.9	38	2-M6	14
SFF-080SS-□B-□B-150N	22, 24, 25	22, 24, 25	78	68.3	53	30	8.3	37	2-M8	34
SFF-080SS-□B-□B-150N	28, 30, 32, 35	28, 30, 32, 35	78	68.3	56	30	8.3	37	2-M6	14
SFF-080SS-□B-□B-200N	22, 24, 25	22, 24, 25	78	67.7	53	30	7.7	42	2-M8	34
	28, 30, 32, 35	28, 30, 32, 35	78	67.7	70	30	7.7	42	2-M8	34
	38	38	78	67.7	74	30	7.7	42	2-M8	34
SFF-090SS-□B-□B-250N	25･28	25, 28, 30, 32	88	68.3	66	30	8.3	50	2-M8	34
SFF-090SS-□B-□B-250N	-	35, 38, 40, 42	88	68.3	74	30	8.3	50	2-M8	34
SFF-090SS-□B-□B-300N	30･32	30･32	88	68.3	66	30	8.3	50	2-M8	34
SFF-090SS-□B-□B-300N	35, 38, 40, 42	35, 38, 40, 42	88	68.3	74	30	8.3	50	2-M8	34
SFF-100SS-□B-□B-450N	32, 35, 38, 40, 42, 45, 48	32, 35, 38, 40, 42, 45, 48	98	90.2	84	40	10.2	56	2-M10	68
SFF-120SS-□B-□B-600N	32, 35, 38, 40, 42, 45	32, 35, 38, 40, 42, 45	118	90.2	84	40	10.2	68	2-M10	68
SFF-120SS-□B-□B-600N	48, 50, 55	48, 50, 55	118	90.2	100	40	10.2	68	2-M10	68

The designation for M1 and M2 clamp bolts consists of the quantity followed by the thread size; the quantity refers to the number of bolts on one side of the hub.

[Standard Hole Diameter]

Model	Standard hole diameter d1, d2 [mm]
Model	Nominal	8	9	9.525	10	11	12	14	15	16	17	18	19	20	22	24	25	28	30	32	35	38	40	42	45	48	50	55
SFF-040SS-□B-□B-8N	d1	●	●	●
SFF-040SS-□B-□B-8N	d2	●	●	●	●	●	●	●	●	●
SFF-040SS-□B-□B-12N	d1				●	●	●	●	●	●
SFF-040SS-□B-□B-12N	d2				●	●	●	●	●	●
SFF-050SS-□B-□B-25N	d1				●	●	●	●	●	●	●	●	●
SFF-050SS-□B-□B-25N	d2				●	●	●	●	●	●	●	●	●
SFF-060SS-□B-□B-60N	d1						●	●	●	●	●	●	●
SFF-060SS-□B-□B-60N	d2						●	●	●	●	●	●	●	●	●	●	●	●	●
SFF-060SS-□B-□B-80N	d1													●	●	●	●	●	●
SFF-060SS-□B-□B-80N	d2													●	●	●	●	●	●
SFF-070SS-□B-□B-90N	d1											●	●
SFF-070SS-□B-□B-90N	d2											●	●	●	●	●	●	●	●	●	●
SFF-070SS-□B-□B-100N	d1													●	●	●	●	●	●	●	●
SFF-070SS-□B-□B-100N	d2													●	●	●	●	●	●	●	●
SFF-080SS-□B-□B-150N	d1														●	●	●	●	●	●	●
SFF-080SS-□B-□B-150N	d2														●	●	●	●	●	●	●
SFF-080SS-□B-□B-200N	d1														●	●	●	●	●	●	●	●
SFF-080SS-□B-□B-200N	d2														●	●	●	●	●	●	●	●
SFF-090SS-□B-□B-250N	d1																●	●
SFF-090SS-□B-□B-250N	d2																●	●	●	●	●	●	●	●
SFF-090SS-□B-□B-300N	d1																		●	●	●	●	●	●
SFF-090SS-□B-□B-300N	d2																		●	●	●	●	●	●
SFF-100SS-□B-□B-450N	d1																			●	●	●	●	●	●	●
SFF-100SS-□B-□B-450N	d2																			●	●	●	●	●	●	●
SFF-120SS-□B-□B-600N	d1																			●	●	●	●	●	●	●	●	●
SFF-120SS-□B-□B-600N	d2																			●	●	●	●	●	●	●	●	●

The hole diameters in the fields marked with a ● are supported as standard hole diameters.

三木プーリのサーボフレックスシリーズSFFモデル SSタイプ（クランプ締結仕様）金属板ばねカップリングご注文時の型式構成説明図

[Specifications] Wedge-type fastening

Model	Rated torque [N·m]	Tolerance			Maximum rotational speed [min^⁻¹]	Torsional spring constant [N·m/rad]	Axial spring constant [N/mm]	Moment of inertia [kg·m²]	Mass [kg]	Price [JPY]
Model	Rated torque [N·m]	Eccentricity [mm]	Angular offset [°]	Axial [mm]	Maximum rotational speed [min^⁻¹]	Torsional spring constant [N·m/rad]	Axial spring constant [N/mm]	Moment of inertia [kg·m²]	Mass [kg]	Price [JPY]
SFF-070SS-□K-□K-100N	100	0.02	1	±0.5	18,000	240,000	484	0.66×10⁻³	0.92	28,230
SFF-080SS-□K-□K-150N	150	0.02	1	±0.5	17,000	120,000	96	1.21×10⁻³	1.03	31,310
SFF-080SS-□K-□K-200N	200	0.02	1	±0.5	17,000	310,000	546	1.11×10⁻³	1.26	33,260
SFF-090SS-□K-□K-300N	300	0.02	1	±0.6	15,000	520,000	321	1.75×10⁻³	1.48	35,220
SFF-100SS-□K-□K-450N	450	0.02	1	±0.65	13,000	740,000	540	2.56×10⁻³	1.87	39,130
SFF-120SS-□K-□K-600N	600	0.02	1	±0.8	11000	970,000	360	5.33×10⁻³	2.50	51,710
SFF-140SS-□K-□K-800N	800	0.02	1	±1.0	10,000	1,400,000	360	10.28×10⁻³	4.66	65,690
SFF-140SS-□K-□K-1000N	1000	0.02	1	±1.0	10000	1,400,000	360	14.70×10⁻³	5.01	65,690

The maximum rotational speed does not take dynamic balance into account.
The torsional spring constant value refers to the value for a single element.
The moment of inertia and mass are given for the maximum bore diameter.

[Dimensions] Wedge-type fastening

三木プーリのサーボフレックスシリーズSFFモデルSSタイプ（くさび締結仕様）金属板ばねカップリング寸法図取付寸法および軸径寸法を示す寸法図

Model	d1 [mm]	d2 [mm]	D [mm]	L [mm]	N1 and N2 [mm]	LF[mm]	S[mm]	C[mm]	K [mm]	H [mm]	M1 Quantity - Nominal	M1 Tightening Torque [N·m]	M2 Quantity - Nominal
Model	d1 [mm]	d2 [mm]	D [mm]	L [mm]	N1 and N2 [mm]	LF[mm]	S[mm]	C[mm]	K [mm]	H [mm]	M1 Quantity - Nominal	M1 Tightening Torque [N·m]	M2 Quantity - Nominal
SFF-070SS-□K-□K-100N	18･19	18/19	68	62.9	53	23.5	5.9	5	38	3-5.1	6-M6	10	3-M6
	20, 22, 24, 25	20, 22, 24, 25	68	62.9	58	23.5	5.9	5	38	3-5.1	6-M6	10	3-M6
	28 and 30	28 and 30	68	62.9	63	23.5	5.9	5	38	3-5.1	6-M6	10	3-M6
	32･35	32·35	68	62.9	68	23.5	5.9	5	38	3-5.1	6-M6	10	3-M6
SFF-080SS-□K-□K-150N	22, 24, 25	22, 24, 25	78	69.3	58	25.5	8.3	5	37	4–5.1	4-M6	10	2-M6
	28 and 30	28 and 30	78	69.3	63	25.5	8.3	5	37	4–5.1	4-M6	10	2-M6
	32 and 35	32, 35	78	69.3	68	25.5	8.3	5	37	4–5.1	4-M6	10	2-M6
	-	38	78	69.3	73	25.5	8.3	5	37	4–5.1	4-M6	10	2-M6
SFF-080SS-□K-□K-200N	22, 24, 25	22, 24, 25	78	68.7	58	25.5	7.7	5	42	3-5.1	6-M6	10	3-M6
	28 and 30	28 and 30	78	68.7	63	25.5	7.7	5	42	3-5.1	6-M6	10	3-M6
	32･35	32 and 35	78	68.7	68	25.5	7.7	5	42	3-5.1	6-M6	10	3-M6
	38	38	78	68.7	73	25.5	7.7	5	42	3-5.1	6-M6	10	3-M6
SFF-090SS-□K-□K-300N	28･30	28･30	88	69.3	63	25.5	8.3	5	50	3–6.8	6–M6	10	3-M6
	32･35	32·35	88	69.3	68	25.5	8.3	5	50	3–6.8	6–M6	10	3-M6
	38, 40, 42	38, 40, 42	88	69.3	73	25.5	8.3	5	50	3–6.8	6–M6	10	3-M6
	45	45	88	69.3	78	25.5	8.3	5	50	3–6.8	6–M6	10	3-M6
	48	48	88	69.3	83	25.5	8.3	5	50	3–6.8	6–M6	10	3-M6
SFF-100SS-□K-□K-450N	32･35	32･35	98	75.2	68	27.5	10.2	5	56	3–6.8	6-M6	10	3-M6
	38, 40, 42	38, 40, 42	98	75.2	73	27.5	10.2	5	56	3–6.8	6-M6	10	3-M6
	45	45	98	75.2	78	27.5	10.2	5	56	3–6.8	6-M6	10	3-M6
	48/50	48/50	98	75.2	83	27.5	10.2	5	56	3–6.8	6-M6	10	3-M6
SFF-120SS-□K-□K-600N	35	35	118	75.2	68	27.5	10.2	5	68	3–6.8	6-M6	10	3-M6
	38, 40, 42	38, 40, 42	118	75.2	73	27.5	10.2	5	68	3–6.8	6-M6	10	3-M6
	45	45	118	75.2	78	27.5	10.2	5	68	3–6.8	6-M6	10	3-M6
	48, 50, 52	48, 50, 52	118	75.2	83	27.5	10.2	5	68	3–6.8	6-M6	10	3-M6
	55	55	118	75.2	88	27.5	10.2	5	68	3–6.8	6-M6	10	3-M6
	60, 62, 65	60, 62, 65	118	75.2	98	27.5	10.2	5	68	3–6.8	6-M6	10	3-M6
	-	70	118	75.2	108	27.5	10.2	5	68	3–6.8	6-M6	10	3-M6
SFF-140SS-□K-□K-800N	35･38	35･38	138	94.6	83	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	40, 42, 45	40, 42, 45	138	94.6	88	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	-	48, 50, 52	138	94.6	98	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	-	55/60	138	94.6	108	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	-	62, 65, 70	138	94.6	118	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	-	75/80	138	94.6	128	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
SFF-140SS-□K-□K-1000N	48, 50, 52	48, 50, 52	138	94.6	98	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	55/60	55/60	138	94.6	108	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	62, 65, 70	62, 65, 70	138	94.6	118	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8
	75	75/80	138	94.6	128	36.5	10.6	5.5	78	3–8.6	6-M8	24	3-M8

The designation for the M1 clamping bolt and the M2 removal screw hole is based on the quantity and thread size. Additionally, the quantities listed for H, M1, and M2 refer to the number on one side of the hub.

[Standard Hole Diameter]

Model	Standard hole diameter d1, d2 [mm]
Model	Nominal	18	19	20	22	24	25	28	30	32	35	38	40	42	45	48	50	52	55	60	62	65	70	75	80
SFF-070SS-□K-□K-100N	d1	●	●	●	●	●	●	●	●	●	●
SFF-070SS-□K-□K-100N	d2	●	●	●	●	●	●	●	●	●	●
SFF-080SS-□K-□K-150N	d1				●	●	●	●	●	●	●
SFF-080SS-□K-□K-150N	d2				●	●	●	●	●	●	●	●
SFF-080SS-□K-□K-200N	d1				●	●	●	●	●	●	●	●
SFF-080SS-□K-□K-200N	d2				●	●	●	●	●	●	●	●
SFF-090SS-□K-□K-300N	d1							●	●	●	●	●	●	●	●	●
SFF-090SS-□K-□K-300N	d2							●	●	●	●	●	●	●	●	●
SFF-100SS-□K-□K-450N	d1									●	●	●	●	●	●	●	●
SFF-100SS-□K-□K-450N	d2									●	●	●	●	●	●	●	●
SFF-120SS-□K-□K-600N	d1										●	●	●	●	●	●	●	●	●	●	●	●
SFF-120SS-□K-□K-600N	d2										●	●	●	●	●	●	●	●	●	●	●	●	●
SFF-140SS-□K-□K-800N	d1										●	●	●	●	●
SFF-140SS-□K-□K-800N	d2										●	●	●	●	●	●	●	●	●	●	●	●	●	●	●
SFF-140SS-□K-□K-1000N	d1															●	●	●	●	●	●	●	●	●
SFF-140SS-□K-□K-1000N	d2															●	●	●	●	●	●	●	●	●	●

The hole diameters in the fields marked with a ● are supported as standard hole diameters.

三木プーリのサーボフレックスシリーズSFFモデル SSタイプ（くさび締結仕様）金属板ばねカップリングご注文時の型式構成説明図

テーパ軸対応 SFF-□SS-□B(N)

片側のハブをテーパフランジとすることで、サーボモータのテーパ軸に対応します。

仕様・寸法　シングルエレメント・クランプ方式

三木プーリのサーボフレックスシリーズSFFモデルSSタイプ（クランプ締結仕様）（テーパ軸対応）金属板ばねカップリング寸法図取付寸法および軸径寸法を示す寸法図

型式	許容トルク［N・m］	慣性モーメント［kg・m²］	質量［kg］
SFF-040SS-□B-11CN-8N	8	0.03×10⁻³	0.20
SFF-040SS-□B-11CN-12N	12	0.03×10⁻³	0.18
SFF-050SS-□B-14CN-25N	25	0.09×10⁻³	0.36
SFF-050SS-□B-16CN-25N	25	0.10×10⁻³	0.41
SFF-060SS-□B-16CN-60N	60	0.18×10⁻³	0.54
SFF-060SS-□B-16CN-80N	80	0.19×10⁻³	0.52

慣性モーメントおよび質量は、最大穴径時の値となります。
上表以外の仕様につきましては、シングルエレメント・クランプ方式の仕様をご参照ください。

型式	d1 [mm]	d2 [mm]	W [mm]	T [mm]	D [mm]	L [mm]	N1 [mm]	Ｎ 2 [mm]	LF1 [mm]	LF2 [mm]	S [mm]	K [mm]	H [mm]	M 数量- 呼び	締め付けトルク [N･m]	DA [mm]	Ｗ A [mm]	J 呼び×ピッチ	締め付けトルク [N･m]
SFF-040SS- □ B-11CN-8N	8 ～ 9.525	11	4	12.2	38	46.4	33	22	17.5	25	3.9	17	5.1	2-M4	3.4	12	6	M6×1.0	10
SFF-040SS- □B-11CN-12N	10 ～ 16	11	4	12.2	38	46.4	33	22	17.5	25	3.9	17	5.1	2-M4	3.4	12	6	M6×1.0	10
SFF-050SS- □B-14CN-25N	10 ～ 19	14	4	15.1	48	56.9	42	27.5	21.5	30	5.4	20	5.1	2-M5	7	15	8	M8×1.0	20
SFF-050SS- □B-16CN-25N	10 ～ 19	16	5	17.3	48	67.9	42	29.5	21.5	41	5.4	20	6.8	2-M5	7	16	10	Ｍ10×1.25	30
SFF-060SS- □B-16CN-60N	12 ～ 19	16	5	17.3	58	70.4	44	29.5	24	41	5.4	32	6.8	2-M6	14	16	10	Ｍ10×1.25	30
SFF-060SS- □B-16CN-80N	20 ～ 22	16	5	17.3	58	70.4	44	29.5	24	41	5.4	32	6.8	2-M6	14	16	10	Ｍ10×1.25	30
SFF-060SS- □B-16CN-80N	24 ～ 28	16	5	17.3	58	70.4	48	29.5	24	41	5.4	32	6.8	2-M5	7	16	10	Ｍ10×1.25	30
SFF-060SS- □B-16CN-80N	30	16	5	17.3	58	70.4	52	29.5	24	41	5.4	32	6.8	2-M5	7	16	10	Ｍ10×1.25	30

【標準穴径】（テーパ軸）

型式	標準穴径　d1[mm]
型式	8	9	9.525	10	11	12	14	15	16	17	18	19	20	22	24	25	28	30
SFF-040 □ - □ B-11CN-8N	●	●	●
SFF-040 □ - □B-11CN-12N				●	●	●	●	●	●
SFF-050 □ - □B-14CN-25N				●	●	●	●	●	●	●	●	●
SFF-050 □ - □B-16CN-25N				●	●	●	●	●	●	●	●	●
SFF-060 □ - □B-16CN-60N						●	●	●	●	●	●	●
SFF-060 □ - □B-16CN-80N													●	●	●	●	●	●

●印の入っている欄の穴径は標準穴径として対応しています。

三木プーリのサーボフレックスシリーズSFFモデル（テーパ軸）金属板ばねカップリングご注文時の型式構成説明図

[Specifications] Clamp-type fastening

[Dimensions] Clamp-type

[Standard Hole Diameter]

[Specifications] Wedge-type fastening

[Dimensions] Wedge-type fastening

[Standard Hole Diameter]

テーパ軸対応 SFF-□SS-□B(N)

片側のハブをテーパフランジとすることで、サーボモータのテーパ軸に対応します。

仕様・寸法 シングルエレメント・クランプ方式

【標準穴径】（テーパ軸）

仕様・寸法　シングルエレメント・クランプ方式