Model NO.: MIKI PULLEY
Material: Stainless Steel
Type: Universal Coupling
Temperature Range: -40°c to +140°c
Applicable Specification Voltages: 12 V DC, 24 V DC, 45 V DC, 90 V DC 180 V DC
Trademark: CZFL
Transport Package: Export Carton
Specification: diameter 3mm-45mm
Origin: Japan
HS Code: 8483600090
It can be very difficult to fully center two shafts when connecting them together. Shaft deflection caused in operation of the machinery, thermal expansion of the shafts, warping of support plates over long periods of use, and wear of shaft bearings can also make it difficult to keep the shafts centered. The role of the coupling is to resolve these types of problems through the selection of the right coupling for the job. Miki Pulley provides a wide range of coupling products not just for general purpose motors, but for everything from servo motors, which demand ultra-precise control, to engines, which generate high vibration and large shocks.


These are disc-spring couplings that use a lightweight, high-strength aluminum alloy for the clamp hub to enable high torsional stiffness and high response. Both single-element types with high torsional stiffness and flexible double-element types that separate double elements with a spacer are available. Both lower the moment of inertia by linking the outer diameter of the hub to the shaft diameter.


SFC-SA2 Types
Model Type Rated torque
[Nm]		 Misalignment Max. rotation speed
[min-1]		 Torsional stiffness
[Nm/rad]		 Axial stiffness
[N/mm]		 Moment of inertia
[kgm2]		 Mass[kg]
Parallel[mm] Angular[] Axial[mm]
SFC-002SA2 C 0.25 0.01 0.5 ±0.04 10000 190 34 0.06×10-6 0.003
SFC-005SA2 C 0.6 0.02 0.5 ±0.05 10000 500 140 0.26×10-6 0.007
SFC-010SA2 C 1 0.02 1 ±0.1 10000 1400 140 0.58×10-6 0.011
SFC-020SA2 C 2 0.02 1 ±0.15 10000 3700 64 2.39×10-6 0.025
SFC-025SA2 C 4 0.02 1 ±0.19 10000 5600 60 3.67×10-6 0.029
SFC-030SA2 A 5 0.02 1 ±0.2 10000 8000 64 4.07×10-6 0.034
B 6.09×10-6 0.041
C 8.20×10-6 0.049
SFC-035SA2 C 10 0.02 1 ±0.25 10000 18000 112 18.44×10-6 0.082
SFC-040SA2 A 12 0.02 1 ±0.3 10000 20000 80 16.71×10-6 0.077
B 22.55×10-6 0.085
C 29.25×10-6 0.100
SFC-050SA2 A 25 0.02 1 ±0.4 10000 32000 48 55.71×10-6 0.159
B 76.26×10-6 0.177
C 99.03×10-6 0.206
SFC-055SA2 C 40 0.02 1 ±0.42 10000 50000 43 188.0×10-6 0.314
SFC-060SA2 A 60 0.02 1 ±0.45 10000 70000 76.4 145.9×10-6 0.283
B 205.0×10-6 0.326
C 268.6×10-6 0.385
SFC-080SA2 C 100 0.02 1 ±0.55 10000 140000 128 710.6×10-6 0.708
SFC-090SA2 C 180 0.02 1 ±0.65 10000 100000 108 1236×10-6 0.946
SFC-100SA2 C 250 0.02 1 ±0.74 10000 120000 111 1891×10-6 1.202


* Check the Standard Bore Diameter list 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.

Features of SFC Models
These are disc-spring couplings that use a lightweight, high-strength aluminum alloy for the clamp hub to enable high torsional stiffness and high response. Both single-element types with high torsional stiffness and flexible double-element types that separate double elements with a spacer are available. Both lower the moment of inertia by linking the outer diameter of the hub to the shaft diameter.


Ultra-low inertia
The outer diameter shape of the clamp hub is linked to the bore diameter you are using. This decreases inertia to the lowest amount necessary by reducing the outer diameter when the bore diameter is small, making these optimal for fast-accelerating operation. Three shapes are available to match the combination of bore diameters you are using.

Simple, reliable, no backlash
Since the clamp method is used to couple to the shaft, mounting can be completed by tightening one bolt each on left and right. Clamp hubs enable reliable connections that are strong against vibration and shocks, and all power is transmitted by frictional couplings, so there is no backlash. The clamp hubs on both sides of the coupling are centered using a dedicated tool, ensuring concentricity.

Blocks heat
A stainless steel disc spring is used for the element, so heat from the servo motor does not readily transfer to the driven shaft, reducing inconsistency in precision caused by thermal expansion.

For tapered shafts
Allows coupling via a clamp hub when an optional taper adapter is mounted on the tapered shaft of a servo motor.



Application
Machine tools/Semiconductor production equipment/Actuators/Chip mounters/Printing machines/Packaging machinery




Model		 Size Static friction torque Ts [Nm] Coil (at 20ºC) Heat resistance class Max. rotation speed [min-1] Rotating part moment of inertia J [kgm2] Allowable braking energy rate Ebaℓ [J] Total braking energy ET [J] Armature pull-in time ta [s] Armature release time tar [s] Mass [kg]
Voltage [V] Wattage [W] Current [A] Resistance [Ω]
BXW-01-10R 01 0.3 24 6.1 0.254 94.4 F 6000 1.36×10-7 15 3000 0.035 0.020 0.1
BXW-03-10R 03 1.3 24 7.2 0.300 80.0 F 6000 1.17×10-6 87 17000 0.050 0.020 0.3
BXW-05-10R 05 2.5 24 8.0 0.333 72.0 F 6000 3.68×10-6 200 40000 0.060 0.020 0.5

*The armature pull-in time and armature release time are taken during DC [Dimensions]
Material Ethylene propylene diene monomer (EPDM) rubber
Temperature range -40°C to +140°C
Exterior color Black
Applicable brake models L type, H type, S type BXW models
Applicable brake sizes #01, #02, #03, #04, #05
Applicable specification voltages 12 V DC, 24 V DC, 45 V DC, 90 V DC 180 V DC

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September 08, 2023