Product Information

Options of SFC Models

Tapered shaft supported Allows coupling clamping hub when a taper adapter is mounted on the tapered shaft of a servo motor.

SFC (SA2)

Specifications

Model Rated torque [N·m] Misalignment Max. rotation speed [min-1] Torsional stiffness [N·m/rad] Axial stiffness [N/mm] Type Moment of inertia[kg·m2] Mass [kg]
Parallel [mm] Angular [°] Axial [mm]
SFC-040SA2-□B-11BC 12 0.02 1 ±0.3 10000 20000 80 B 26.58×10-6 0.131
C 33.28×10-6 0.146
SFC-050SA2-□B-11BC 25 0.02 1 ±0.4 10000 32000 48 B 82.91×10-6 0.240
C 103.5×10-6 0.258
SFC-050SA2-□B-14BC 25 0.02 1 ±0.4 10000 32000 48 B 88.72×10-6 0.271
C 111.5×10-6 0.301
SFC-050SA2-□B-16BC 25 0.02 1 ±0.4 10000 32000 48 B 95.44×10-6 0.309
C 118.2×10-6 0.338
SFC-055SA2-□B-14BC 40 0.02 1 ±0.42 10000 50000 43 C 201.1×10-6 0.409
SFC-055SA2-□B-16BC 40 0.02 1 ±0.42 10000 50000 43 C 207.8×10-6 0.446
SFC-060SA2-□B-16BC 60 0.02 1 ±0.45 10000 70000 76.4 B 228.7×10-6 0.475
C 287.8×10-6 0.517

* Types B / C are automatically specified by Miki Pulley according to the bore diameter you select, and cannot be specified by the customer.

* Check the "Standard Bore Diameters" 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

Unit [mm]
Model d2 W T WA LA dA DA LL D L LF C A1 A2 M
SFC-040SA2-□B-11BC 11 4 12.2 18 16 17 22 44 44 34 15.5 4.5 11 17 1-M4
SFC-050SA2-□B-11BC 11 4 12.2 18 16 17 22 48.4 56 43.4 20.5 6 14.5 22 1-M5
SFC-050SA2-□B-14BC 14 4 15.1 24 19 22 28 53.4 56 43.4 20.5 6 14.5 22 1-M5
SFC-050SA2-□B-16BC 16 5 17.3 24 29 26 30 63.4 56 43.4 20.5 6 14.5 22 1-M5
SFC-055SA2-□B-14BC 14 4 15.1 24 19 22 28 56.6 63 50.6 24 7.75 - 23 1-M6
SFC-055SA2-□B-16BC 16 5 17.3 24 29 26 30 66.6 63 50.6 24 7.75 - 23 1-M6
SFC-060SA2-□B-16BC 16 5 17.3 24 29 26 30 69.6 68 53.6 25.2 7.75 17.5 26.5 1-M6

* For other dimensions, see dimensions for single element type SFC(SA2).

SFC (DA2)

Specifications

Model Rated torque [N·m] Misalignment Max. rotation speed [min-1] Torsional stiffness [N·m/rad] Axial stiffness [N/mm] Type Moment of inertia[kg·m2] Mass [kg]
Parallel [mm] Angular [°] Axial [mm]
SFC-040DA2-□B-11BC 12 0.24 1(On one side) ±0.6 10000 10000 40 B 39.42×10-6 0.180
C 46.12×10-6 0.195
SFC-050DA2-□B-11BC 25 0.28 1 (On one side) ±0.8 10000 16000 24 B 125.5×10-6 0.331
C 146.1×10-6 0.349
SFC-050DA2-□B-14BC 25 0.28 1 (On one side) ±0.8 10000 16000 24 B 131.1×10-6 0.362
C 154.1×10-6 0.392
SFC-050DA2-□B-16BC 25 0.28 1 (On one side) ±0.8 10000 16000 24 B 138.1×10-6 0.400
C 160.8×10-6 0.430
SFC-055DA2-□B-14BC 40 0.31 1 (On one side) ±0.84 10000 25000 21.5 C 274.0×10-6 0.530
SFC-055DA2-□B-16BC 40 0.31 1 (On one side) ±0.84 10000 25000 21.5 C 280.5×10-6 0.567
SFC-060DA2-□B-16BC 60 0.34 1 (On one side) ±0.9 10000 35000 38.2 B 339.4×10-6 0.638
C 398.5×10-6 0.681

* Types B / C are automatically specified by Miki Pulley according to the bore diameter you select, and cannot be specified by the customer.

* Check the "Standard Bore Diameters" 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

Unit [mm]
Model d2 W T WA LA dA DA LL D L LF C A1 A2 M
SFC-040DA2-□B-11BC 11 4 12.2 18 16 17 22 58 44 48 15.5 4.5 11 17 1-M4
SFC-050DA2-□B-11BC 11 4 12.2 18 16 17 22 64.8 56 59.8 20.5 6 14.5 22 1-M5
SFC-050DA2-□B-14BC 14 4 15.1 24 19 22 28 69.8 56 59.8 20.5 6 14.5 22 1-M5
SFC-050DA2-□B-16BC 16 5 17.3 24 29 26 30 79.8 56 59.8 20.5 6 14.5 22 1-M5
SFC-055DA2-□B-14BC 14 4 15.1 24 19 22 28 74.4 63 68.7 24 7.75 - 23 1-M6
SFC-055DA2-□B-16BC 16 5 17.3 24 29 26 30 84.7 63 68.7 24 7.75 - 23 1-M6
SFC-060DA2-□B-16BC 16 5 17.3 24 29 26 30 89.3 68 73.3 25.2 7.75 17.5 26.5 1-M6

* For other dimensions, see dimensions for double element type SFC(DA2).

For length-specifi ed special order parts SFC (DA2) couplings can be made in specific lengths that match the distance between shafts by changing the length of the spacer. Specify the length in 1 mm units.

SFC (DA2)

Specifications

Model Rated torque [N·m] Misalignment Max. rotation speed [min-1] Type Moment of inertia[kg·m2] Mass [kg]
Parallel [mm] Min. L Parallel [mm] Max. L Angular [°] Axial [mm]
Min. L Max. L Min. L Max. L
SFC-005DA2 0.6 0.03 0.20 0.5 (On one side) ±0.1 10000 C 0.33×10-6 0.62×10-6 0.009 0.017
SFC-010DA2 1 0.08 0.44 1 (On one side) ±0.2 10000 C 0.72×10-6 1.38×10-6 0.014 0.026
SFC-020DA2 2 0.10 0.46 1 (On one side) ±0.33 10000 C 3.02×10-6 5.30×10-6 0.031 0.054
SFC-025DA2 4 0.09 0.46 1 (On one side) ±0.38 10000 C 4.55×10-6 7.95×10-6 0.036 0.061
SFC-030DA2 5 0.11 0.48 1 (On one side) ±0.4 10000 A 6.09×10-6 12.80×10-6 0.046 0.085
B 8.11×10-6 14.82×10-6 0.053 0.091
C 10.22×10-6 16.93×10-6 0.061 0.099
SFC-035DA2 10 0.15 0.54 1 (On one side) ±0.5 10000 C 23.85×10-6 35.97×10-6 0.108 0.161
SFC-040DA2 12 0.15 0.54 1 (On one side) ±0.6 10000 A 25.06×10-6 44.76×10-6 0.107 0.174
B 30.89×10-6 50.62×10-6 0.116 0.182
C 37.58×10-6 57.31×10-6 0.130 0.197
SFC-050DA2 25 0.16 0.63 1 (On one side) ±0.8 10000 A 77.42×10-6 144.3×10-6 0.205 0.347
B 97.97×10-6 164.8×10-6 0.225 0.365
C 120.8×10-6 187.6×10-6 0.252 0.394
SFC-055DA2 40 0.16 0.60 1 (On one side) ±0.84 10000 C 226.8×10-6 325.0×10-6 0.378 0.538
SFC-060DA2 60 0.19 0.63 1 (On one side) ±0.9 10000 A 210.8×10-6 340.1×10-6 0.382 0.567
B 269.9×10-6 399.2×10-6 0.424 0.609
C 333.5×10-6 462.8×10-6 0.484 0.669

* 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 Diameters" for SFC (DA2) as there may be limitations on the rated torque caused by the holding power of the coupling shaft section.

* Max. rotation speed does not take into account dynamic balance.

* The moment of inertia and mass are measured for the maximum bore diameter.

* See "Specifications" for SFC (DA2) for stiffness values.

Dimensions

Unit [mm]
Model d1*1 d2*1 D N L LF S A1 A2 C d3 K M Tightening torque [N·m] Type
Min. Max. Min. Max. Std. Min. Max.
SFC-005DA2 3 6 3 6 16 -- 23.2 21 40 7.85 1 -- 4.8 2.5 6.5 6.5 1-M2 0.4 to 0.5 C
SFC-010DA2 3 8 3 8 19 -- 25.9 24 45 9.15 1.05 -- 5.8*2 3.15 8.5 8.5 1-M2.5*3 1.0 to 1.1*3 C
SFC-020DA2 4 10 4 11 26 -- 32.3 29 50 10.75 1.65 -- 9.5 3.3 10.6 10.6 1-M2.5 1.0 to 1.1 C
SFC-025DA2 5 14 5 14 29 -- 32.8 29 50 10.75 1.9 -- 11 3.3 15 14.5 1-M2.5 1.0 to 1.1 C
SFC-030DA2 5 10 5 10 34 21.6 37.8 34 55 12.4 2.5 8 -- 3.75 15 14.5 1-M3 1.5 to 1.9 A
>10 16 12.5 B
>10 14 -- -- C
SFC-035DA2 6 16 6 19 39 -- 48 43 65 15.5 3 -- 14 4.5 17 17 1-M4 3.4 to 4.1 C
SFC-040DA2 8 15 8 15 44 29.6 48 43 65 15.5 3 11 -- 4.5 20 19.5 1-M4 3.4 to 4.1 A
>15 24 17 B
>15 19 -- -- C
SFC-050DA2 8 19 8 19 56 38 59.8 53 80 20.5 2.4 14.5 -- 6 26 26 1-M5 7.0 to 8.5 A
>19 30 22 B
>19 25 -- -- C
SFC-055DA2 10 30 10 30 63 -- 68.7 60 85 24 2.6 -- 23 7.75 31 31 1-M6 14 to 15 C
SFC-060DA2 11 24 11 24 68 46 73.3 65 90 25.2 3.2 17.5 -- 7.75 31 31 1-M6 14 to 15 A
>24 35 26.5 B
>24 30 -- -- C

* 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 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.

* Compatible lengths L range from the minimum L dimension to the maximum L dimension shown in the above table. Specify in 1 mm units.

* When the L dimension is shorter than the standard, the left/right clamping bolt phases will be off by 45°.

* Check Standard Bore Diameters for SFC(DA2) for the standard bore diameters.

Keyway milling applications If you are using a keyed shaft, we can mill a keyway in the clamping hub to your specifications.

SFC (SA2/DA2)

Dimensions

Unit [mm]
Compatible with H9 Class standard keyway widths Compatible with JS9 Class standard keyway widths
Nominal bore diameter Bore diameter (d1, d2) Keyway width (W1, W2) Keyway height (T1, T2) Nominal bore diameter Bore diameter (d1, d2) Keyway width (W1, W2) Keyway height (T1, T2)
8BH 8 3+0.0250 9.4+0.30 8BJ 8 3±0.0125 9.4+0.30
9BH 9 3+0.0250 10.4+0.30 9BJ 9 3±0.0125 10.4+0.30
10BH 10 3+0.0250 11.4+0.30 10BJ 10 3±0.0125 11.4+0.30
11BH 11 4+0.0300 12.8+0.30 11BJ 11 4±0.0150 12.8+0.30
12BH 12 4+0.0300 13.8+0.30 12BJ 12 4±0.0150 13.8+0.30
13BH 13 5+0.0300 15.3+0.30 13BJ 13 5±0.0150 15.3+0.30
14BH 14 5+0.0300 16.3+0.30 14BJ 14 5±0.0150 16.3+0.30
15BH 15 5+0.0300 17.3+0.30 15BJ 15 5±0.0150 17.3+0.30
16BH 16 5+0.0300 18.3+0.30 16BJ 16 5±0.0150 18.3+0.30
17BH 17 5+0.0300 19.3+0.30 17BJ 17 5±0.0150 19.3+0.30
18BH 18 6+0.0300 20.8+0.30 18BJ 18 6±0.0150 20.8+0.30
19BH 19 6+0.0300 21.8+0.30 19BJ 19 6±0.0150 21.8+0.30
20BH 20 6+0.0300 22.8+0.30 20BJ 20 6±0.0150 22.8+0.30
22BH 22 6+0.0300 24.8+0.30 22BJ 22 6±0.0150 24.8+0.30
24BH 24 8+0.0360 27.3+0.30 24BJ 24 8±0.0180 27.3+0.30
25BH 25 8+0.0360 28.3+0.30 25BJ 25 8±0.0180 28.3+0.30
28BH 28 8+0.0360 31.3+0.30 28BJ 28 8±0.0180 31.3+0.30
30BH 30 8+0.0360 33.3+0.30 30BJ 30 8±0.0180 33.3+0.30
32BH 32 10+0.0360 35.3+0.30 32BJ 32 10±0.0180 35.3+0.30
35BH 35 10+0.0360 38.3+0.30 35BJ 35 10±0.0180 38.3+0.30
38BH 38 10+0.0360 41.3+0.30 38BJ 38 10±0.0180 41.3+0.30
40BH 40 12+0.0430 43.3+0.30 40BJ 40 12±0.0215 43.3+0.30
42BH 42 12+0.0430 45.3+0.30 42BJ 42 12±0.0215 45.3+0.30
45BH 45 14+0.0430 48.8+0.30 45BJ 45 14±0.0215 48.8+0.30

*We can also handle standards not listed above. Consult Miki Pulley.


Standard Bore Diameter

Model Standard bore diameter, d2 (mm)
8 9 10 11 12 13 14 15 16 17 18 19 20 22 24 25 28 30 32 35 38 40 42 45
SFC-025
SFC-030
SFC-035
SFC-040 9
SFC-050 18 20 22
SFC-055 31 34 36 38
SFC-060 50 51
SFC-080
SFC-090
SFC-100 226

* 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 -0.025 to +0.010.

* 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].

Related Product