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SFC [DA2] CC/CF: Low-Particle Design

三木プーリのサーボフレックスSFCモデル SFC-DA2-CCタイプ／SFC-DA2-CFタイプ金属板ばねカップリング製品画像（クリーン仕様・高精度トルク伝達・サーボ用途軸継手）

This is a simplified cleanroom-compatible solution that includes cleanroom cleaning, assembly, and clean packaging for the double-element type. The basic design is the same as the standard model, with modifications to the surface treatment of the main body and the use of stainless steel bolts. For the clamping bolts used to secure axial force, you can choose between two types of grease: fluorinated grease and low-dust grease.

[Specifications]

Model	Type	Allowable 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	Type	Allowable 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]
SFC-020DA2	C	2	0.15	1 (per side)	±0.33	10,000	1850	32	3.43×10⁻⁶	0.035	－
SFC-025DA2	C	4	0.16	1 (per side)	±0.38	10,000	2,800	30	5.26×10⁻⁶	0.040	－
SFC-030DA2	A	5	0.18	1 (per side)	±0.4	10,000	4,000	32	7.46×10⁻⁶	0.054	－
	B								9.49×10⁻⁶	0.060	－
	C								11.60×10⁻⁶	0.069	－
SFC-035DA2	C	10	0.24	1 (per side)	±0.5	10,000	9,000	56.2	27.03×10⁻⁶	0.122	－
SFC-040DA2	A	12	0.24	1 (per side)	±0.6	10,000	10,000	40	30.03×10⁻⁶	0.124	－
	B								35.81×10⁻⁶	0.132	－
	C								42.60×10⁻⁶	0.147	－
SFC-050DA2	A	25	0.28	1 (per side)	±0.8	10,000	16,000	24	99.32×10⁻⁶	0.252	－
	B								119.8×10⁻⁶	0.270	－
	C								142.4×10⁻⁶	0.299	－
SFC-055DA2	C	40	0.31	1 (per side)	±0.84	10,000	25,000	21.5	262.3×10⁻⁶	0.436	－
SFC-060DA2	A	60	0.34	1 (per side)	±0.9	10,000	35,000	38.2	258.6×10⁻⁶	0.450	－
	B								317.8×10⁻⁶	0.493	－
	C								381.6×10⁻⁶	0.552	－
SFC-080DA2	C	100	0.52	1 (per side)	±1.10	10,000	70,000	64	1047×10⁻⁶	1.050	－

The shape type (A, B, or C) is automatically determined based on the combination of hole diameters you select, so you cannot specify it.
The allowable torque may be limited by the holding force of the shaft fastening section, so please check the "standard bore diameter."
The maximum rotational speed does not take dynamic balance into account.
The torsional spring constant values are based solely on measurements taken of the element section.
The moment of inertia and mass are based on the maximum bore diameter.

[Dimensions]

SFC-DA2 Dimensions

Model	Shape TYPE	d1		d2		D	N	L	LF	LP	S	A1	A2	C	d3	K	M	Tightening torque [N·m]
Model	Shape TYPE	Minimum	Max	Min	Max	D	N	L	LF	LP	S	A1	A2	C	d3	K	M	CC Low-dust	CF Fluorine
SFC-020DA2	C	5	10	5	11	26	－	32.3	10.75	7.5	1.65	－	9.5	3.3	10.6	10.6	1-M2.5	0.5	0.9
SFC-025DA2	C	5	14	5	14	29	－	32.8	10.75	7.5	1.9	－	11	3.3	15	14.5	1-M2.5	0.5	0.9
SFC-030DA2	A	5	10	5	10	34	21.6	37.8	12.4	8	2.5	8	－	3.75	15	14.5	1-M3	1.5	3.2
	B	Over 10		16
	C	Over 10		14
SFC-035DA2	C	6	16	6	19	39	－	48	15.5	11	3	－	14	4.5	17	17	1-M4	4	7.7
SFC-040DA2	A	8	15	8	15	44	29.6	48	15.5	11	3	11	－	4.5	20	19.5	1-M4	4	7.7
	B	Exceeding 15		24
	C	Over 15		24
SFC-050DA2	A	8	19	8	19	56	38	59.8	20.5	14	2.4	14.5	－	6	26	26	1-M5	7	12
	B	Over 19		30
	C	Over 19		25
SFC-055DA2	C	10	30	10	30	63	－	68.7	24	15.5	2.6	－	23	7.75	31	31	1-M6	13	22.5
SFC-060DA2	A	11	24	11	24	68	46	73.3	25.2	16.5	3.2	17.5	－	7.75	31	31	1-M6	13	22.5
	B	Over 24		35
	C	Over 24		30
SFC-080DA2	C	18	35	18	40	82	－	98	30	22	8	－	28	9	40	38	1-M8	27	45

The shape type (A, B, or C) is automatically determined based on the combination of hole diameters you select, so you cannot specify it.
Dimension K is the inner diameter of the element. If dimension d2 exceeds this value, the shaft can only be inserted into the hub on the d2 side up to dimension LF.
The designation for Clamp Bolt M is based on the number of threads and the thread size; the number refers to the number of threads on one side of the hub.
Please choose from two types of grease for clamping bolts used to secure axial force: low-dust grease and fluorinated grease.

[Standard Bore Diameter] (Low-dust grease specification)

SFC-DA2 Standard Bore Diameter and Torque Capacity Table

Model	Standard (Optional) Bore Diameter d1･d2 [mm] and Maximum Torque [N･m]
Model	d1･d2	5	6	6.35	7	8	9	9.525	10	11	12	13	14	15	16	17	18	19	20	22	24	25	28	30	32	35	38	40
SFC-020DA2	d1	0.5	0.6	0.6	0.6	1	1.3	1.3	●
SFC-020DA2	d2	0.5	0.6	0.6	0.6	1	1.3	1.3	●	●
SFC-025DA2	d1	0.5	0.5	0.5	0.5	0.8	0.8	0.8	1.8	1.8	2.3	2.3	●
SFC-025DA2	d2	0.5	0.5	0.5	0.5	0.8	0.8	0.8	1.8	1.8	2.3	2.3	●
SFC-030DA2	d1	0.8	1.6	2	2.6	3.4	4.4	4.9	●	●	●	●	●
SFC-030DA2	d2	0.8	1.6	2	2.6	3.4	4.4	4.9	●	●	●	●	●	●	●
SFC-035DA2	d1		3.3	3.8	4.8	6.3	7.7	8.5	9.2	●	●	●	●	●	●
SFC-035DA2	d2		3.3	3.8	4.8	6.3	7.7	8.5	9.2	●	●	●	●	●	●	●	●	●
SFC-040DA2	d1					9	9	9	9	9	●	●	●	●	●	●	●	●
SFC-040DA2	d2					9	9	9	9	9	●	●	●	●	●	●	●	●	●	●	●
SFC-050DA2	d1					11	16	17	19	19	24	24	24	●	●	●	●	●	●	●	●	●
SFC-050DA2	d2					11	16	17	19	19	24	24	24	●	●	●	●	●	●	●	●	●	●	●
SFC-055DA2	d1								20	24	29	33	37	●	●	●	●	●	●	●	●	●	●	●
SFC-055DA2	d2								20	24	29	33	37	●	●	●	●	●	●	●	●	●	●	●
SFC-060DA2	d1									38	41	44	48	55	55	58	●	●	●	●	●	●	●	●
SFC-060DA2	d2									38	41	44	48	55	55	58	●	●	●	●	●	●	●	●	●	●
SFC-080DA2	d1																54	60	65	75	85	90	●	●	●	●
SFC-080DA2	d2																54	60	65	75	85	90	●	●	●	●	●	●

The standard bore diameter for shaft tolerance h7 (h6/g6) is nominal B. However, for a bore diameter of φ35, the shaft tolerance is -0.025 to +0.010.
The hole diameters indicated by the ● symbol and numerical values in the corresponding columns are standard sizes. For hole diameters not listed in the table above, we may be able to accommodate your request; please contact us for details.
Because the hole diameter in the column containing the numerical values is small, the allowable torque is limited by the holding force at the shaft fastening point. The numerical values indicate the allowable torque [N·m].

[Standard Bore Diameter] (Fluorinated Grease Specification)

Standard Bore Diameter and Allowable Torque Table

Model	Standard (Optional) Bore Diameter d1･d2 [mm] and Maximum Torque [N･m]
Model	d1･d2	5	6	6.35	7	8	9	9.525	10	11	12	13	14	15	16	17	18	19	20	22	24	25	28	30	32	35	38	40
SFC-020DA2	d1	0.7	0.7	0.7	0.8	●	●	●	●	●
SFC-020DA2	d2	0.7	0.7	0.7	0.8	●	●	●	●	●	●
SFC-025DA2	d1	0.5	0.5	0.5	1.1	1.6	1.6	1.6	3.2	3.2	●	●	●
SFC-025DA2	d2	0.5	0.5	0.5	1.1	1.6	1.6	1.6	3.2	3.2	●	●	●
SFC-030DA2	d1	0.8	0.8	2	2.4	3.1	4.3	●	●	●	●	●	●	●
SFC-030DA2	d2	0.8	0.8	2	2.4	3.1	4.3	●	●	●	●	●	●	●	●
SFC-035DA2	d1		3.6	5.2	6.4	8.2	●	●	●	●	●	●	●	●	●	●
SFC-035DA2	d2		3.6	5.2	6.4	8.2	●	●	●	●	●	●	●	●	●	●	●	●
SFC-040DA2	d1					●	●	●	●	●	●	●	●	●	●	●	●	●
SFC-040DA2	d2					●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●
SFC-050DA2	d1					11	17	19	20	22	●	●	●	●	●	●	●	●	●	●	●	●
SFC-050DA2	d2					11	17	19	20	22	●	●	●	●	●	●	●	●	●	●	●	●	●	●
SFC-055DA2	d1								28	37	●	●	●	●	●	●	●	●	●	●	●	●	●	●
SFC-055DA2	d2								28	37	●	●	●	●	●	●	●	●	●	●	●	●	●	●
SFC-060DA2	d1									40	44	49	53	●	●	●	●	●	●	●	●	●	●	●
SFC-060DA2	d2									40	44	49	53	●	●	●	●	●	●	●	●	●	●	●	●	●
SFC-080DA2	d1																60	66	71	81	90	95	●	●	●	●
SFC-080DA2	d2																60	66	71	81	90	95	●	●	●	●	●	●

The standard bore diameter for shaft tolerance h7 (h6/g6) is designation B. However, for a bore diameter of φ35, the shaft tolerance is -0.025 to +0.010.
The hole diameters indicated by the ● symbol and numerical values in the corresponding columns are standard sizes. For hole diameters not listed in the table above, we may be able to accommodate your request; please contact us for details.
Because the hole diameter in the column containing the numerical values is small, the allowable torque is limited by the holding force at the shaft fastening point. The numerical values indicate the allowable torque [N·m].