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三木プーリのサーボフレックスラバー SFR-SA1タイプゴム・樹脂カップリング製品画像（防振・衝撃吸収・サーボモータ用軸継手）

This is a high-damping rubber coupling designed for servo and stepper motors. Our newly developed rubber element delivers high damping and low reaction force. It absorbs vibrations more quickly than flexible couplings that use metal in their elastic components. This helps suppress resonance phenomena that are a concern with stepper motors and similar applications.

[Specifications]

Model	Shape: TYPE	Torque	Tolerance			Maximum Rotational Speed [min⁻¹]	Torsional Spring Constant [N·m/rad]	Moment of Inertia [kg·m²]	Mass [kg]	Price [JPY]
Model	Shape: TYPE	Rated load [N·m]	Eccentricity [mm]	Angular Deviation [°]	Axial [mm]	Maximum Rotational Speed [min⁻¹]	Torsional Spring Constant [N·m/rad]	Moment of Inertia [kg·m²]	Mass [kg]	Price [JPY]
SFR-005SA1	C	0.6	0.15	1.5	±0.2	10,000	30	0.32×10⁻⁶	0.009	7,230
SFR-010SA1		1					47	0.73×10⁻⁶	0.014	6,120
SFR-020SA1		2					178	3.11×10⁻⁶	0.032	7,080
SFR-025SA1		4	0.2		±0.3		254	4.88×10⁻⁶	0.038	7,600
SFR-030SA1	A	5					396	6.62×10⁻⁶	0.048	8,050
	B	5					396	8.65×10⁻⁶	0.054	8,050
	C	5					396	10.76×10^⁻⁶	0.063	8,050
SFR-035SA1	C	10					607	26.98×10⁻⁶	0.105	9,330
SFR-040SA1	A	12					1128	25.37×10⁻⁶	0.103	11,250
	B	12					1128	31.96×10⁻⁶	0.114	11,250
	C	12					1128	38.64×10⁻⁶	0.128	11,250
SFR-050SA1	A	25					2775	85.36×10⁻⁶	0.216	13,660
	B	25					2775	105.75×10⁻^⁶	0.234	13,660
	C	25					2775	128.36×10⁻⁶	0.263	13,660

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 the analytical results for the element section at 20°C.
The moment of inertia and mass are based on the maximum bore diameter.

[Dimensions]

三木プーリのサーボフレックスラバー SFR-SA1タイプゴム・樹脂カップリング寸法図（防振・衝撃吸収・サーボモータ用軸継手）

Model	Shape TYPE	d1 [mm]		d2 [mm]		D[mm]	N[mm]	L[mm]	LF[mm]	LP[mm]	S[mm]	A1[mm]	A2[mm]	C[mm]	d3 [mm]	M Quantity - Nominal	Tightening torque [N·m]
Model	Shape TYPE	Minimum	Max	Min	Max	D[mm]	N[mm]	L[mm]	LF[mm]	LP[mm]	S[mm]	A1[mm]	A2[mm]	C[mm]	d3 [mm]	M Quantity - Nominal	Tightening torque [N·m]
SFR-005SA1	C	3	5	3	6	16	-	22.7	7.85	6.4	0.3	-	4.8	2.5	5.5	1-M2	0.4–0.5
SFR-010SA1		3	7	3	8	19		25.4	9.15	6.6	0.25		5.8(6)	3.15	7.5	1–M2.5 (M2)	1.0–1.1 (0.4–0.5)
SFR-020SA1		4	10	4	11	26		31.8	10.75	8.9	0.7		9.5	3.3	10.5	1–M2.5	1.0–1.1
SFR-025SA1		5	13	5	14	29		32.3	10.75	9.4	0.7		11	3.3	13.5	1–M2.5	1.0–1.1
SFR-030SA1	A		10	5	10	34	21.6	37.8	12.4	11	1	8	-	3.75	15.5	1-M3	1.5–1.9
	B		10	Over 10	16	34	21.6	37.8	12.4	11	1	8	12.5	3.75	15.5	1-M3	1.5–1.9
	C	Over 10	15	Over 10	16	34	-	37.8	12.4	11	1	-	12.5	3.75	15.5	1-M3	1.5–1.9
SFR-035SA1	C	6	18	6	19	39	-	48	15.5	15	1	-	14	4.5	18.5	1-M4	3.4–4.1
SFR-040SA1	A	8	15	8	15	44	29.6					11	-		23.5
	B	8	15	Over 15	24	44	29.6					11	17		23.5
	C	Exceeding 15	22	Over 15	24	44	-					-	17		23.5
SFR-050SA1	A	8	19	8	19	56	38	59.8	20.5	17.4	0.7	14.5	-	6	29.5	1-M5	7.0–8.5
	B	8	19	Over 19	30	56	38	59.8	20.5	17.4	0.7	14.5	22	6	29.5	1-M5	7.0–8.5
	C	Over 19	28	Over 19	30	56	-	59.8	20.5	17.4	0.7	-	22	6	29.5	1-M5	7.0–8.5

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 d3 dimension is the inner diameter of the element. If the d2 dimension exceeds this value, the shaft can only be inserted into the hub on the d2 side up to the LF dimension.
The designation for Clamp Bolt M 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]

Standard (optional) hole diameters d1 and d2 [mm] and the maximum torque [N·m]
Nominal Bore Diameter			3	4	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
Shaft tolerance	h7 (h6·g6)	B	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●
	j6 (optional)	J																			〇		〇	✓		✓
	k6 (optional)	K							〇	〇						〇		✓			〇		〇	〇
Compatible Hole Diameters by Model	SFR-005SA1	d1	●	●	●
	SFR-005SA1	d2	●	●	●	●
	SFR-010SA1	d1	●	●	●	●	●	●
	SFR-010SA1	d2	●	●	●	●	●	●	●
	SFR-020SA1	d1		●	●	●	●	●	●	●	●	●
	SFR-020SA1	d2		●	●	●	●	●	●	●	●	●	●
	SFR-025SA1	d1			2.1	●	●	●	●	●	●	●	●	●	●
	SFR-025SA1	d2			2.1	●	●	●	●	●	●	●	●	●	●	●
	SFR-030SA1	d1			2.8	3.4	●	●	●	●	●	●	●	●	●	●	●
	SFR-030SA1	d2			2.8	3.4	●	●	●	●	●	●	●	●	●	●	●	●
	SFR-035SA1	d1				5	5	6.6	●	●	●	●	●	●	●	●	●	●	●	●
	SFR-035SA1	d2				5	5	6.6	●	●	●	●	●	●	●	●	●	●	●	●	●
	SFR-040SA1	d1							9	●	●	●	●	●	●	●	●	●	●	●	●	●	●
	SFR-040SA1	d2							9	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●
	SFR-050SA1	d1							18	20	22	22	●	●	●	●	●	●	●	●	●	●	●	●	●	●
	SFR-050SA1	d2							18	20	22	22	●	●	●	●	●	●	●	●	●	●	●	●	●	●	●

The standard bore diameter for shaft tolerance h7 (h6, g6) is nominal B.
For shaft tolerances j6 and k6: Nominal sizes J and K are available as options; only the hole diameters marked with a circle are supported.
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].

三木プーリのサーボフレックスラバー SFRモデル SA1タイプゴム・樹脂カップリングご注文時の型式構成説明図