SFC [SA2] CC/CF: Low-Particle Design

三木プーリのサーボフレックスSFCモデル SFC-SA2-CCタイプ／SFC-SA2-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・サーボモータ用高精度軸継手）
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This is a simplified cleanroom-compatible solution that includes cleanroom cleaning, assembly, and cleanroom packaging for single-element types. The basic design is the same as the standard model, with modifications to the main unit’s surface treatment 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]

SFC-SA2 Specifications
Model Type
 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]
Eccentricity
[mm]		 Angular offset
[°]		 Axial
[mm]
SFC-020SA2 C 2 0.02 1 ±0.15 10,000 3,700 64 2.39×10−6 0.025 －
SFC-025SA2 C 4 0.02 1 ±0.19 10,000 5,600 60 3.67×10−6 0.029 －
SFC-030SA2 A 5 0.02 1 ±0.2 10,000 8,000 64 4.09×10−6 0.034 －
B 6.11×10−6 0.040 －
C 8.23×10^(−6) 0.048 －
SFC-035SA2 C 10 0.02 1 ±0.25 10,000 18,000 112 18.50×10−6 0.083 －
SFC-040SA2 A 12 0.02 1 ±0.3 10,000 20,000 80 16.71×10−6 0.077 －
B 22.59×10^(−6) 0.085 －
C 29.28×10^(−6) 0.100 －
SFC-050SA2 A 25 0.02 1 ±0.4 10,000 32,000 48 56.26×10−6 0.160 －
B 76.71×10^(−6) 0.178 －
C 99.38×10^(−6) 0.207 －
SFC-055SA2 C 40 0.02 1 ±0.42 10,000 50,000 43 188.7×10−6 0.315 －
SFC-060SA2 A 60 0.02 1 ±0.45 10,000 70,000 76.4 147.0×10−6 0.285 －
B 206.3×10^(−6) 0.328 －
C 270.0×10^(−6) 0.387 －
SFC-080SA2 C 100 0.02 1 ±0.55 10,000 140,000 128 716.3×10−6 0.720 －
  • 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]

三木プーリのサーボフレックスSFCモデル SFC-SA2-CCタイプ／SFC-SA2-CFタイプ 金属板ばねカップリング寸法図（クリーン仕様・サーボモータ用高精度軸継手）
SFC-SA2 Dimensions Table
Model Shape TYPE d1 d2 D N L LF S A1 A2 C K M Tightening torque [N·m]
Minimum Max Min Max CC Low-dust CF Fluorine
SFC-020SA2 C 5 10 5 11 26 － 23.15 10.75 1.65 － 9.5 3.3 10.6 1-M2.5 0.5 0.9
SFC-025SA2 C 5 14 5 14 29 － 23.4 10.75 1.9 － 11 3.3 14.5 1-M2.5 0.5 0.9
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 3.2
B Over 10 16
C Over 10 14
SFC-035SA2 C 6 16 6 19 39 － 34 15.5 3 － 14 4.5 17 1-M4 4 7.7
SFC-040SA2 A 8 15 8 15 44 29.6 34 15.5 3 11 － 4.5 19.5 1-M4 4 7.7
B Exceeding 15 24
C Over 15 19
SFC-050SA2 A 8 19 8 19 56 38 43.4 20.5 2.4 14.5 － 6 26 1-M5 7 12
B Over 19 30
C Over 19 25
SFC-055SA2 C 10 30 10 30 63 － 50.6 24 2.6 － 23 7.75 31 1-M6 13 22.5
SFC-060SA2 A 11 24 11 24 68 46 53.6 25.2 3.2 17.5 － 7.75 31 1-M6 13 22.5
B Over 24 35
C Over 24 30
SFC-080SA2 C 18 35 18 40 82 － 68 30 8 － 28 9 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 cannot be inserted into the hub on the d2 side up to dimension LF.
  • The designation for Clamp Bolt M consists of the quantity followed by the thread size, where the quantity refers to the number of hubs on one side.
  • 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)

Standard Bore Diameter and Allowable Torque Table
Model Standard (Optional) Bore Diameter d1･d2 [mm] and Maximum Torque [N･m]
d1･d2 566.357899.5251011121314151617181920222425283032353840
SFC-020SA2 d1 0.5 0.6 0.6 0.6 1 1.3 1.3 ●
SFC-020SA2 d2 0.5 0.6 0.6 0.6 1 1.3 1.3 ● ●
SFC-025SA2 d1 0.5 0.5 0.5 0.5 0.8 0.8 0.8 1.8 1.8 2.3 2.3 ●
SFC-025SA2 d2 0.5 0.5 0.5 0.5 0.8 0.8 0.8 1.8 1.8 2.3 2.3 ●
SFC-030SA2 d1 0.8 1.6 2 2.6 3.4 4.4 4.9 ● ● ● ● ●
SFC-030SA2 d2 0.8 1.6 2 2.6 3.4 4.4 4.9 ● ● ● ● ● ● ●
SFC-035SA2 d1 3.3 3.8 4.8 6.3 7.7 8.5 9.2 ● ● ● ● ● ●
SFC-035SA2 d2 3.3 3.8 4.8 6.3 7.7 8.5 9.2 ● ● ● ● ● ● ● ● ●
SFC-040SA2 d1 9 9 9 9 9 ● ● ● ● ● ● ● ●
SFC-040SA2 d2 9 9 9 9 9 ● ● ● ● ● ● ● ● ● ● ●
SFC-050SA2 d1 11 16 17 19 19 24 24 24 ● ● ● ● ● ● ● ● ●
SFC-050SA2 d2 11 16 17 19 19 24 24 24 ● ● ● ● ● ● ● ● ● ● ●
SFC-055SA2 d1 20 24 29 33 37 ● ● ● ● ● ● ● ● ● ● ●
SFC-055SA2 d2 20 24 29 33 37 ● ● ● ● ● ● ● ● ● ● ●
SFC-060SA2 d1 38 41 44 48 55 55 58 ● ● ● ● ● ● ● ●
SFC-060SA2 d2 38 41 44 48 55 55 58 ● ● ● ● ● ● ● ● ● ●
SFC-080SA2 d1 54 60 65 75 85 90 ● ● ● ●
SFC-080SA2 d2 54 60 65 75 85 90 ● ● ● ● ● ●

[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]
d1･d2 566.357899.5251011121314151617181920222425283032353840
SFC-020SA2 d1 0.7 0.7 0.7 0.8 ● ● ● ●
SFC-020SA2 d2 0.7 0.7 0.7 0.8 ● ● ● ● ●
SFC-025SA2 d1 0.5 0.5 0.5 1.1 1.6 1.6 1.6 3.2 3.2 ● ● ●
SFC-025SA2 d2 0.5 0.5 0.5 1.1 1.6 1.6 1.6 3.2 3.2 ● ● ●
SFC-030SA2 d1 0.8 2 2.4 3.1 4.3 ● ● ● ● ● ● ●
SFC-030SA2 d2 0.8 2 2.4 3.1 4.3 ● ● ● ● ● ● ● ● ●
SFC-035SA2 d1 3.6 5.2 6.4 8.2 ● ● ● ● ● ● ● ● ●
SFC-035SA2 d2 3.6 5.2 6.4 8.2 ● ● ● ● ● ● ● ● ● ● ● ●
SFC-040SA2 d1 ● ● ● ● ● ● ● ● ● ● ● ● ●
SFC-040SA2 d2 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
SFC-050SA2 d1 11 17 19 20 22 ● ● ● ● ● ● ● ● ● ● ● ●
SFC-050SA2 d2 11 17 19 20 22 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
SFC-055SA2 d1 28 37 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
SFC-055SA2 d2 28 37 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
SFC-060SA2 d1 40 44 49 53 ● ● ● ● ● ● ● ● ● ● ●
SFC-060SA2 d2 40 44 49 53 ● ● ● ● ● ● ● ● ● ● ● ● ●
SFC-080SA2 d1 60 66 71 81 90 95 ● ● ● ●
SFC-080SA2 d2 60 66 71 81 90 95 ● ● ● ● ● ●

  • 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 fields 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シリーズSFCモデル SA2タイプ（クリーン仕様）金属板ばねカップリング ご注文時の型式構成説明図