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Discontinued Products

Servo couplings / clamping set, key / 1 disc, 2 discs / body: aluminium / SFC / MIKI PULLEY

Promotional pricing ends 30/11/2024
Volume Discount

Uses lightweight, high-strength aluminum alloy for clamp hub. Extremely high torsional rigidity supporting high responsiveness.

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Product specification
Part Numbers
Catalog

Metal Disc Couplings SERVOFLEX SFC Series

Applications

NC lathe, machining center, chip mounter, actuator, SCARA robot, semiconductor manufacturing equipment

Max. rated torque	[N·m]	250
Bore ranges	[mm]	Φ 3~45

High Stiffness and Ultra-low Inertia

Small- and medium-capacity model, which is made of a high-strength aluminum alloy and whose outer hub diameter is linked to the shaft diameter to achieve a ultra-low inertia ideal for high-speed rotation. Three different shapes are available depending on the combination of bore diameters you use.

Simple and Reliable Connection

A single clamping method is used for connection to the shaft. The clamping hub is shock and vibration proof, enabling reliable connection and helping to substantially reduce mounting time. A special jig is used for centering to achieve an extremely high concentricity.

Wide Variety of Options

A wide variety of options such as a tapered shaft, length-specified special order, and keyway milling application are available. You can combine options to meet your desired specifications.

＊1 For surface processing of the clamping bolts , black coating is applied only for #002.
＊2 The collar material in the marked area is S45C in sizes #080 to #100, and the surface ﬁnishing is trivalent chrome treatment.
＊3 The bolt surface ﬁnishing in the marked area is anti-rust coating in sizes #080 to #100.

SERVOFLEX SFC (SA2) Single Element Type

Specifications

Model	Shape type	Rated torque [N･m]	Misalignment			Max. rotation speed [min^－1]	Torsional stiffness [N･m/rad]	Axial stiffness [N/mm]	Moment of inertia [kg･m²]	Mass [kg]
Model	Shape type	Rated torque [N･m]	Parallel [mm]	Angular [°]	Axial [mm]	Max. rotation speed [min^－1]	Torsional stiffness [N･m/rad]	Axial stiffness [N/mm]	Moment of inertia [kg･m²]	Mass [kg]
SFC-002SA2	C	0.25	0.01	0.5	±0.04	10000	190	34	0.06×10^－6	0.003
SFC-005SA2	C	0.6	0.02	0.5	±0.05	10000	500	140	0.26×10^－6	0.007
SFC-010SA2	C	1	0.02	1	±0.1	10000	1400	140	0.58×10^－6	0.011
SFC-020SA2	C	2	0.02	1	±0.15	10000	3700	64	2.39×10^－6	0.025
SFC-025SA2	C	4	0.02	1	±0.19	10000	5600	60	3.67×10^－6	0.029
SFC-030SA2	A	5	0.02	1	±0.2	10000	8000	64	4.07×10^－6	0.034
	B	5	0.02	1	±0.2	10000	8000	64	6.09×10^－6	0.041
	C	5	0.02	1	±0.2	10000	8000	64	8.20×10^－6	0.049
SFC-035SA2	C	10	0.02	1	±0.25	10000	18000	112	18.44×10^－6	0.082
SFC-040SA2	A	12	0.02	1	±0.3	10000	20000	80	16.71×10^－6	0.077
	B	12	0.02	1	±0.3	10000	20000	80	22.55×10^－6	0.085
	C	12	0.02	1	±0.3	10000	20000	80	29.25×10^－6	0.100
SFC-050SA2	A	25	0.02	1	±0.4	10000	32000	48	55.71×10^－6	0.159
	B	25	0.02	1	±0.4	10000	32000	48	76.26×10-^－6	0.177
	C	25	0.02	1	±0.4	10000	32000	48	99.03×10^－6	0.206
SFC-055SA2	C	40	0.02	1	±0.42	10000	50000	43	188.0×10^－6	0.314
SFC-060SA2	A	60	0.02	1	±0.45	10000	70000	76.4	145.9×10^－6	0.283
	B	60	0.02	1	±0.45	10000	70000	76.4	205.0×10^－6	0.326
	C	60	0.02	1	±0.45	10000	70000	76.4	268.6×10^－6	0.385
SFC-080SA2	C	100	0.02	1	±0.55	10000	140000	128	710.6×10^－6	0.708
SFC-090SA2	C	180	0.02	1	±0.65	10000	100000	108	1236×10^－6	0.946
SFC-100SA2	C	250	0.02	1	±0.74	10000	120000	111	1891×10^－6	1.202

* Types A / B / C are automatically speciﬁed by Miki Pulley according to the combination of bore diameters you select, and cannot be speciﬁed by the customer. * Check the Standard Bore Diameter list as rated torque may be restricted by the holding power of the shaft connection component. * Max. rotation speed does not take into account dynamic balance. * Torsional stiﬀness values given are measured values for the element alone. * The moment of inertia and mass are measured for the maximum bore diameter.

Dimensions

Model	Shape type	d1 [mm]		d2 [mm]		D [mm]	DB [mm]	N [mm]	L [mm]	LF [mm]	S [mm]	A1 [mm]	A2 [mm]	C [mm]	K [mm]	M Quantity - Nominal dia.	Tightening torque [N･m]
Model	Shape type	Min.	Max.	Min.	Max.	D [mm]	DB [mm]	N [mm]	L [mm]	LF [mm]	S [mm]	A1 [mm]	A2 [mm]	C [mm]	K [mm]	M Quantity - Nominal dia.	Tightening torque [N･m]
SFC-002SA2	C	3	5	3	5	12	12.4	-	12.35	5.9	0.55	-	3.7	1.9	5.6	1-M1.6	0.23 ～ 0.28
SFC-005SA2	C	3	6	3	6	16	-	-	16.7	7.85	1	-	4.8	2.5	6.5	1-M2	0.4 ～ 0.5
SFC-010SA2	C	3	8	3	8	19	-	-	19.35	9.15	1.05	-	5.8(6)	3.15	8.5	1-M2.5(M2)	1.0 ～ 1.1(0.4 ～ 0.5)
SFC-020SA2	C	4	10	4	11	26	-	-	23.15	10.75	1.65	-	9.5	3.3	10.6	1-M2.5	1.0 ～ 1.1
SFC-025SA2	C	5	14	5	14	29	-	-	23.4	10.75	1.9	-	11	3.3	14.5	1-M2.5	1.0 ～ 1.1
SFC-030SA2	A	5	10	5	10	34	-	21.6	27.3	12.4	2.5	8	-	3.75	14.5	1-M3	1.5 ～ 1.9
	B	5	10	Over10	16	34	-	21.6	27.3	12.4	2.5	8	12.5	3.75	14.5	1-M3	1.5 ～ 1.9
	C	Over10	14	Over10	16	34	-	-	27.3	12.4	2.5	-	12.5	3.75	14.5	1-M3	1.5 ～ 1.9
SFC-035SA2	C	6	16	6	19	39	-	-	34	15.5	3	-	14	4.5	17	1-M4	3.4 ～ 4.1
SFC-040SA2	A	8	15	8	15	44	-	29.6	34	15.5	3	11	-	4.5	19.5	1-M4	3.4 ～ 4.1
	B	8	15	Over15	24	44	-	29.6	34	15.5	3	11	17	4.5	19.5	1-M4	3.4 ～ 4.1
	C	Over15	19	Over15	24	44	-	-	34	15.5	3	-	17	4.5	19.5	1-M4	3.4 ～ 4.1
SFC-050SA2	A	8	19	8	19	56	-	38	43.4	20.5	2.4	14.5	-	6	26	1-M5	7.0 ～ 8.5
	B	8	19	Over19	30	56	-	38	43.4	20.5	2.4	14.5	22	6	26	1-M5	7.0 ～ 8.5
	C	Over19	25	Over19	30	56	-	-	43.4	20.5	2.4	-	22	6	26	1-M5	7.0 ～ 8.5
SFC-055SA2	C	10	30	10	30	63	-	-	50.6	24	2.6	-	23	7.75	31	1-M6	14 ～ 15
SFC-060SA2	A	11	24	11	24	68	-	46	53.6	25.2	3.2	17.5	-	7.75	31	1-M6	14 ～ 15
	B	11	24	Over24	35	68	-	46	53.6	25.2	3.2	17.5	26.5	7.75	31	1-M6	14 ～ 15
	C	Over24	30	Over24	35	68	-	-	53.6	25.2	3.2	-	26.5	7.75	31	1-M6	14 ～ 15
SFC-080SA2	C	18	35	18	40	82	-	-	68	30	8	-	28	9	38	1-M8	27 ～ 30
SFC-090SA2	C	25	40	25	45	94	-	-	68.3	30	8.3	-	34	9	42	1-M8	27 ～ 30
SFC-100SA2	C	32	45	32	45	104	-	-	69.8	30	9.8	-	39	9	48	1-M8	27 ～ 30

* Types A / B / C are automatically speciﬁed by Miki Pulley according to the combination of bore diameters you select, and cannot be speciﬁed by the customer. * The øDB value is measured assuming that the head of the clamping bolt is larger than the external diameter of the hub. * The K dimension is the inner diameter of the element. For d2 dimension exceeding this value, shaft can be inserted only up to LF dimension to the d2 side hub. * The nominal diameter for the clamping bolt M is equal to the quantity minus the nominal diameter of the screw threads, where the quantity is for a hub on one side. * The ﬁgures in parentheses ( ) for the SFC-010 are the values when d1 or d2 is ø8 mm.

Standard Bore Diameters

Standard (option) bore diameter, d1/d2 [mm] and restricted rated torque [N･m]

Nominal bore diameter

6.35

9.525

Shaft
tolerance

h7 (h6,g6)

•

j6 (Option)

○

k6 (Option)

○

SFC-002SA2

•

SFC-005SA2

•

SFC-010SA2

•

SFC-020SA2

•

SFC-025SA2

2.1

•

2.1

•

SFC-030SA2

2.8

3.4

•

2.8

3.4

•

SFC-035SA2

6.6

•

6.6

•

SFC-040SA2

•

SFC-050SA2

•

SFC-055SA2

•

SFC-060SA2

•

SFC-080SA2

•

SFC-090SA2

•

SFC-100SA2

226

•

226

•

* The shaft tolerance for standard bore diameter is h7 (h6 or g6): designation B. However, for a bore diameter of ø35, the shaft tolerance is +0.010 -0.025. * Shaft tolerances j6/k6: designations J/K are optional, and are only supported for bore diameters marked with ○ . * Bore diameters marked with ● or numbers are supported as the standard bore diameters. Consult Miki Pulley regarding special arrangements which may be possible for other bore diameters. * Bore diameters whose ﬁelds contain numbers are restricted in their rated torque by the holding power of the shaft connection component because the bore diameter is small. The numbers indicate the rated torque [N•m].

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