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）
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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]
Eccentricity
[mm]		 Angular offset
[°]		 Axial
[mm]
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]

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SFC-DA2 Dimensions
Model Shape TYPE d1 d2 D N L LF LP S A1 A2 C d3 K M Tightening torque [N·m]
Minimum Max Min Max 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]
d1･d2 566.357899.5251011121314151617181920222425283032353840
SFC-020DA2 d1 0.5 0.6 0.6 0.6 1 1.3 1.3 ●
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 ●
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 ● ● ● ● ●
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 ● ● ● ● ● ●
d2 3.3 3.8 4.8 6.3 7.7 8.5 9.2 ● ● ● ● ● ● ● ● ●
SFC-040DA2 d1 9 9 9 9 9 ● ● ● ● ● ● ● ●
d2 9 9 9 9 9 ● ● ● ● ● ● ● ● ● ● ●
SFC-050DA2 d1 11 16 17 19 19 24 24 24 ● ● ● ● ● ● ● ● ●
d2 11 16 17 19 19 24 24 24 ● ● ● ● ● ● ● ● ● ● ●
SFC-055DA2 d1 20 24 29 33 37 ● ● ● ● ● ● ● ● ● ● ●
d2 20 24 29 33 37 ● ● ● ● ● ● ● ● ● ● ●
SFC-060DA2 d1 38 41 44 48 55 55 58 ● ● ● ● ● ● ● ●
d2 38 41 44 48 55 55 58 ● ● ● ● ● ● ● ● ● ●
SFC-080DA2 d1 54 60 65 75 85 90 ● ● ● ●
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]
d1･d2 566.357899.5251011121314151617181920222425283032353840
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].
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