Product Information

SFH Models Specifications

SFH (S) Types

[Specifications] SFH-□S

ModelRated torque [N・m]MisalignmentMax. rotation speed [min-1Torsional stiffness [N・m/rad]Axial stiffness[N/mm]Moment of inertia [kg・m2Mass [kg]
Angular [°]Axial [mm]
SFH-150S10001±0.45900150000024412.60×10-34.71
SFH-170S13001±0.55100284000022426.88×10-37.52
SFH-190S20001±0.54700340000024443.82×10-310.57
SFH-210S40001±0.554300468000050868.48×10-313.78
SFH-220S50001±0.640005940000448102.53×10-318.25
SFH-260S80001±0.7340010780000612233.86×10-329.66

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

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

[Dimensions] SFH-□S

Unit [mm]
Modeld1, d2DNLLFSFKM
Pilot boreMin.Max.
SFH-150S20227015210410145115946-M8×36
SFH-170S252880178118124551461086-M10×45
SFH-190S3032851901261456515101166-M12×54
SFH-210S353890210130165751581246-M16×60
SFH-220S45481002251442009020-21326-M16×60
SFH-260S505511526216622310023111506-M20×80

*Pilot bores are to be drilled into the part. See the standard hole-drilling standards for information on bore drilling.

*If you require a product with an LS dimension that exceeds those above, contact Miki Pulley with your required dimension [mm]. Please contact Miki Pulley for assistance if the LS dimension is less than those above or if LS ≧ 1000.

*The nominal diameter of the reamer bolt is equal to the quantity minus the nominal diameter of the screw threads times the nominal length.

[Specifications] SFH-□S-□K-□K

ModelRated torque [N・m]MisalignmentMax. rotation speed [min-1Torsional stiffness [N・m/rad]Axial stiffness[N/mm]Moment of inertia [kg・m2Mass [kg]
Angular [°]Axial [mm]
SFH-150S10001±0.45900150000024425.14×10-38.95
SFH-170S13001±0.55100284000022447.90×10-312.53
SFH-190S20001±0.54700340000024460.40×10-314.21
SFH-210S40001±0.554300468000050880.50×10-316.12

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

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

[Dimensions] SFH-□S-□K-□K

Unit [mm]
ModelDLd1, d2N1, N2LFSCKMM1M2
SFH-150S15215738, 40, 42, 45, 48, 5010865118946-M8×366-M8×603-M8
55, 56, 60, 65, 70128
SFH-170S17816038, 40, 42, 45, 48, 50108651481086-M10×456-M8×603-M8
55, 56, 60, 65, 70128
75, 80148
SFH-190S19017538, 40, 42, 45, 48, 501087015101166-M12×546-M10×653-M10
55, 56, 60, 65, 70128
75, 80, 85148
SFH-210S21018138, 40, 42, 45, 48, 501087315101246-M16×606-M10×653-M10
55, 56, 60, 65, 70128
75, 80, 85, 90148

*The nominal diameters of each bolt and tap are equal to the quantity minus the nominal diameter of the screw threads times the nominal length. The quantities for the pressure bolt M1 and detachment screw hole M2 are quantities for the hub on one side.

[Standard bore diameter combinations]

ModelStandard bore diameters d1, d2 [mm]
384042454850555660657075808590
SFH-150S
SFH-170S110012001250
SFH-190S18001900
SFH-210S1800190020002150230024002600265028503100335036003800

*The bore diameters marked with ● or numbers are supported as standard bore diameter.

*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 value [N·m].

[Standard Hole-drilling Standards]

Unit [mm]
Models compliant with the old JIS standard (class 2) JIS B 1301 1959Models compliant with the new JIS standard (H9) JIS B 1301 1996Models compliant with the motor standard JIS C 4210 2001
Nominal bore diameterBore diameter (d1, d2)Keyway width (W1, W2)Keyway height (T1, T2)Set screw hole (M)Nominal bore diameterBore diameter (d1, d2)Keyway width (W1, W2)Keyway height (T1, T2)Set screw hole (M)Nominal bore diameterBore diameter (d1, d2)Keyway width (W1, W2)Keyway height (T1, T2)Set screw hole (M)
ToleranceH7ToleranceE9---- ToleranceH7ToleranceH9---- ToleranceG7, F7ToleranceH9----
2222+0.02107+0.061+0.02525.0+0.302-M622H22+0.02106+0.030024.8+0.302-M5----------
2424+0.02107+0.061+0.02527.0+0.302-M624H24+0.02108+0.036027.3+0.302-M624N24+0.028+0.0078+0.036027.3+0.302-M6
2525+0.02107+0.061+0.02528.0+0.302-M625H25+0.02108+0.036028.3+0.302-M6----------
2828+0.02107+0.061+0.02531.0+0.302-M628H28+0.02108+0.036031.3+0.302-M628N28+0.028+0.0078+0.036031.3+0.302-M6
3030+0.02107+0.061+0.02533.0+0.302-M630H30+0.02108+0.036033.3+0.302-M6----------
3232+0.025010+0.061+0.02535.5+0.302-M832H32+0.025010+0.036035.3+0.302-M8----------
3535+0.025010+0.061+0.02538.5+0.302-M835H35+0.025010+0.036038.3+0.302-M8----------
3838+0.025010+0.061+0.02541.5+0.302-M838H38+0.025010+0.036041.3+0.302-M838N38+0.050+0.025+0.03601041.3+0.302-M8
4040+0.025010+0.061+0.02543.5+0.302-M840H40+0.025012+0.043043.3+0.302-M8----------
4242+0.025012+0.061+0.02545.5+0.302-M842H42+0.025012+0.043045.3+0.302-M842N42+0.050+0.02512+0.043045.3+0.302-M8
4545+0.025012+0.061+0.02548.5+0.302-M845H45+0.025014+0.043048.8+0.302-M10----------
4848+0.025012+0.061+0.02551.5+0.302-M848H48+0.025014+0.043051.8+0.302-M1048N48+0.050+0.02514+0.043051.8+0.302-M10
5050+0.025012+0.061+0.02553.5+0.302-M850H50+0.025014+0.043053.8+0.302-M10----------
5555+0.030015+0.075+0.03260.0+0.302-M1055H55+0.030016+0.043059.3+0.302-M1055N55+0.060+0.03016+0.043059.3+0.302-M10
5656+0.030015+0.075+0.03261.0+0.302-M1056H56+0.030016+0.043060.3+0.302-M10----------
6060+0.030015+0.075+0.03265.0+0.302-M1060H60+0.030018+0.043064.4+0.302-M1060N60+0.060+0.03018+0.043064.4+0.302-M10
6565+0.030018+0.075+0.03271.0+0.302-M1065H65+0.030018+0.043069.4+0.302-M1065N65+0.060+0.03018+0.043069.4+0.302-M10
7070+0.030018+0.075+0.03276.0+0.302-M1070H70+0.030020+0.052074.9+0.502-M10----------
7575+0.030020+0.092+0.04081.0+0.502-M1075H75+0.030020+0.052079.9+0.502-M1075N75+0.060+0.03020+0.052079.9+0.502-M10
8080+0.030020+0.092+0.04086.0+0.502-M1080H80+0.030022+0.052085.4+0.502-M12----------
8585+0.035024+0.092+0.04093.0+0.502-M1285H85+0.035022+0.052090.4+0.502-M1285N85+0.071+0.03522+0.052090.4+0.502-M12
9090+0.035024+0.092+0.04098.0+0.502-M1290H90+0.035025+0.052095.4+0.502-M12----------
9595+0.035024+0.092+0.040103.0+0.502-M1295H95+0.035025+0.0520100.4+0.502-M1295N95+0.071+0.03525+0.0520100.4+0.502-M12
100100+0.035028+0.092+0.040109.0+0.502-M12100H100+0.035028+0.0520106.4+0.502-M12----------
115115+0.035032+0.112+0.050125.0+0.502-M12115H115+0.035032+0.0520122.4+0.502-M12----------

* Positions of set screws and keyways are not on the same plane.

* Set screws are included with the product.

* Positioning precision for keyway milling is determined by sight.

* Contact Miki Pulley when the keyway requires a positioning precision for a particular flange hub.

* Consult the technical documentation at the end of this volume for standard dimensions for bore drilling other than those given here.

【Set screw position】

Unit [mm]
ModelDistance from edge[mm]
SFH-15015
SFH-17020
SFH-19025
SFH-21030
SFH-22035
SFH-26040

SFH (G) Types

[Specifications] SFH-□G

ModelRated torque [N・m]MisalignmentMax. rotation speed [min-1Torsional stiffness [N・m/rad]Axial stiffness[N/mm]Moment of inertia [kg・m2Mass [kg]
Parallel [mm]Angular [°]Axial [mm]
SFH-150G10001.41 (On one side)±0.8590075000012221.87×10-38.72
SFH-170G13001.61 (On one side)±1.05100142000011251.07×10-313.94
SFH-190G20002.01 (On one side)±1.04700170000012281.58×10-319.51
SFH-210G40002.11 (On one side)±1.143002340000254125.50×10-324.26
SFH-220G50002.31 (On one side)±1.240002970000224176.91×10-330.27
SFH-260G80002.91 (On one side)±1.434005390000306433.47×10-353.11

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

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

[Dimensions] SFH-□G

Unit [mm]
Modeld1, d2DNLLFLSSFKM
Pilot boreMin.Max.
SFH-150G20227015210418245701159412-M8×36
SFH-170G252880178118218558014610812-M10×45
SFH-190G30328519012626065100151011612-M12×54
SFH-210G3538902101302907511015812412-M16×60
SFH-220G45481002251443359011520-213212-M16×60
SFH-260G5055115262166391100145231115012-M20×80

*Pilot bores are to be drilled into the part. See the standard hole-drilling standards for information on bore drilling.

*If you require a product with an LS dimension other than that above, contact Miki Pulley with your required dimension [mm]. Please contact Miki Pulley for assistance if LS ≧ 1000.

*The nominal diameter of the reamer bolt is equal to the quantity minus the nominal diameter of the screw threads times the nominal length.

[Dimensions for Vertical Applications with Max. LS Dimensions] SFH-□G-□K-□K

Unit [mm]
ModelLS [mm]
SFH-150G1100
SFH-170G800
SFH-190G900
SFH-210G2000
SFH-220G1900
SFH-260G2500

*When considering vertical use and the LS dimension is greater than that in the above table, consult Miki Pulley.

[Specifications] SFH-□G-□K-□K

ModelRated torque [N・m]MisalignmentMax. rotation speed [min-1Torsional stiffness ([N・m]/rad)Axial stiffness[N/mm]Moment of inertia [kg・m2Mass [kg]
Parallel [mm]Angular [°]Axial [mm]
SFH-150G10001.41 (On one side)±0.8590075000012234.41×10-312.96
SFH-170G13001.61 (On one side)±1.05100142000011272.09×10-318.95
SFH-190G20002.01 (On one side)±1.04700170000012298.15×10-323.14
SFH-210G40002.11 (On one side)±1.143002340000254137.53×10-326.61

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

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

[Dimensions] SFH-□G-□K-□K

Unit [mm]
ModelDLd1, d2N1, N2LFLSSCKMM1M2
SFH-150G15223838, 40, 42, 45, 48, 5010865701189412-M8×366-M8×603-M8
55, 56, 60, 65, 70128
SFH-170G17825438, 40, 42, 45, 48, 50108658014810812-M10×456-M8×603-M8
55, 56, 60, 65, 70128
75, 80148
SFH-190G19029038, 40, 42, 45, 48, 5010870100151011612-M12×546-M10×653-M10
55, 56, 60, 65, 70128
75, 80, 85148
SFH-210G21030638, 40, 42, 45, 48, 5010873110151012412-M16×606-M10×653-M10
55, 56, 60, 65, 70128
75, 80, 85, 90148

*If you require a product with an LS dimension other than that above, contact Miki Pulley with your required dimension [mm]. Please contact Miki Pulley for assistance if LS ≧ 1000.

*The nominal diameters of each bolt and tap are equal to the quantity minus the nominal diameter of the screw threads times the nominal length. The quantities for the pressure bolt M1 and detachment screw hole M2 are quantities for the hub on one side.

[Combination of Standard Bore Diameter]

ModelStandard bore diameters d1, d2 [mm]
384042454850555660657075808590
SFH-150G
SFH-170G110012001250
SFH-190G18001900
SFH-210G1800190020002150230024002600265028503100335036003800

*The bore diameters marked with ● or numbers are supported as standard bore diameter.

*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 value [N·m].

[Dimensions for Vertical Applications with Max. LS Dimensions]

Unit [mm]
ModelLS [mm]
SFH-150G1100
SFH-170G800
SFH-190G900
SFH-210G2000

*When considering vertical use and the LS dimension is greater than that in the above table, consult Miki Pulley.

[Standard Hole-drilling Standards]

Unit [mm]
Models compliant with the old JIS standard (class 2) JIS B 1301 1959Models compliant with the new JIS standard (H9) JIS B 1301 1996Models compliant with the motor standard JIS C 4210 2001
Nominal bore diameterBore diameter (d1, d2)Keyway width (W1, W2)Keyway height (T1, T2)Set screw hole (M)Nominal bore diameterBore diameter (d1, d2)Keyway width (W1, W2)Keyway height (T1, T2)Set screw hole (M)Nominal bore diameterBore diameter (d1, d2)Keyway width (W1, W2)Keyway height (T1, T2)Set screw hole (M)
ToleranceH7ToleranceE9---- ToleranceH7ToleranceH9---- ToleranceG7, F7ToleranceH9----
2222+0.02107+0.061+0.02525.0+0.302-M622H22+0.02106+0.030024.8+0.302-M5----------
2424+0.02107+0.061+0.02527.0+0.302-M624H24+0.02108+0.036027.3+0.302-M624N24+0.028+0.0078+0.036027.3+0.302-M6
2525+0.02107+0.061+0.02528.0+0.302-M625H25+0.02108+0.036028.3+0.302-M6----------
2828+0.02107+0.061+0.02531.0+0.302-M628H28+0.02108+0.036031.3+0.302-M628N28+0.028+0.0078+0.036031.3+0.302-M6
3030+0.02107+0.061+0.02533.0+0.302-M630H30+0.02108+0.036033.3+0.302-M6----------
3232+0.025010+0.061+0.02535.5+0.302-M832H32+0.025010+0.036035.3+0.302-M8----------
3535+0.025010+0.061+0.02538.5+0.302-M835H35+0.025010+0.036038.3+0.302-M8----------
3838+0.025010+0.061+0.02541.5+0.302-M838H38+0.025010+0.036041.3+0.302-M838N38+0.050+0.025+0.03601041.3+0.302-M8
4040+0.025010+0.061+0.02543.5+0.302-M840H40+0.025012+0.043043.3+0.302-M8----------
4242+0.025012+0.061+0.02545.5+0.302-M842H42+0.025012+0.043045.3+0.302-M842N42+0.050+0.02512+0.043045.3+0.302-M8
4545+0.025012+0.061+0.02548.5+0.302-M845H45+0.025014+0.043048.8+0.302-M10----------
4848+0.025012+0.061+0.02551.5+0.302-M848H48+0.025014+0.043051.8+0.302-M1048N48+0.050+0.02514+0.043051.8+0.302-M10
5050+0.025012+0.061+0.02553.5+0.302-M850H50+0.025014+0.043053.8+0.302-M10----------
5555+0.030015+0.075+0.03260.0+0.302-M1055H55+0.030016+0.043059.3+0.302-M1055N55+0.060+0.03016+0.043059.3+0.302-M10
5656+0.030015+0.075+0.03261.0+0.302-M1056H56+0.030016+0.043060.3+0.302-M10----------
6060+0.030015+0.075+0.03265.0+0.302-M1060H60+0.030018+0.043064.4+0.302-M1060N60+0.060+0.03018+0.043064.4+0.302-M10
6565+0.030018+0.075+0.03271.0+0.302-M1065H65+0.030018+0.043069.4+0.302-M1065N65+0.060+0.03018+0.043069.4+0.302-M10
7070+0.030018+0.075+0.03276.0+0.302-M1070H70+0.030020+0.052074.9+0.502-M10----------
7575+0.030020+0.092+0.04081.0+0.502-M1075H75+0.030020+0.052079.9+0.502-M1075N75+0.060+0.03020+0.052079.9+0.502-M10
8080+0.030020+0.092+0.04086.0+0.502-M1080H80+0.030022+0.052085.4+0.502-M12----------
8585+0.035024+0.092+0.04093.0+0.502-M1285H85+0.035022+0.052090.4+0.502-M1285N85+0.071+0.03522+0.052090.4+0.502-M12
9090+0.035024+0.092+0.04098.0+0.502-M1290H90+0.035025+0.052095.4+0.502-M12----------
9595+0.035024+0.092+0.040103.0+0.502-M1295H95+0.035025+0.0520100.4+0.502-M1295N95+0.071+0.03525+0.0520100.4+0.502-M12
100100+0.035028+0.092+0.040109.0+0.502-M12100H100+0.035028+0.0520106.4+0.502-M12----------
115115+0.035032+0.112+0.050125.0+0.502-M12115H115+0.035032+0.0520122.4+0.502-M12----------

* Positions of set screws and keyways are not on the same plane.

* Set screws are included with the product.

* Positioning precision for keyway milling is determined by sight.

* Contact Miki Pulley when the keyway requires a positioning precision for a particular flange hub.

* Consult the technical documentation at the end of this volume for standard dimensions for bore drilling other than those given here.

【Set screw position】

Unit [mm]
ModelDistance from edge[mm]
SFH-15015
SFH-17020
SFH-19025
SFH-21030
SFH-22035
SFH-26040

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