SERVOFLEX SFC

SERVOFLEX SFC
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SERVOFLEX SFC

Product catalog summary
Overview: The SERVOFLEX SFC is a high-performance metal disc coupling designed for precise control and accurate shaft rotation without backlash, suitable for high-speed, high-precision positioning and ultra-precise control of servomotors.
Specifications: The coupling features high torsional stiffness, high torque, low inertia, and high response speed. It is flexible in parallel misalignment, angular, and axial directions. Materials include SUS304 for the metal disc and collar, and high-strength aluminum alloy for the spacer and clamp hub.
Options: Available options include tapered shaft support, length-specified special orders, and keyway milling applications. Compatible with shaft tolerances j6/k6 and suitable for clean room environments (ISO class 6).
Types and Models: Models such as SFC-002SA2, SFC-005SA2, and SFC-010SA2 are listed with specifications including dimensions, rated torque, misalignment capabilities, and maximum rotation speed.
Performance: Designed to reduce thermal conduction from the servo motor to the driven shaft, minimizing accuracy variations due to thermal expansion. High torsional rigidity while maintaining flexibility in other directions.
Applications: Ideal for applications requiring high precision and control, such as in servomotors and other high-speed machinery.
Ordering Information: Specify model, size, type (DA2 or SA2), and bore diameters (d1 for small, d2 for large). For DA2, specify length in 1 mm increments if a special length is required. Types B, J, and K are assigned based on bore diameter selection.
Dimensions and Tolerances: Standard bore diameters range from 3 mm to 90 mm, with specific torque ratings depending on the diameter. Shaft tolerances are primarily h7, with options for h6, g6, j6, and k6.
Performance Parameters: Rated torque varies by model and bore diameter, with restrictions based on the holding power of the shaft connection component. Maximum rotation speed is specified, but does not account for dynamic balance. Torsional and axial stiffness values are provided for the elements alone.
Standards and Recommendations: Operating temperature range is -30℃ to 100℃. Avoid excessive water and oil exposure to prevent deterioration. Guidelines for handling and mounting ensure accurate concentricity and prevent damage.
Key Data from Tables and Charts: Tables list standard bore diameters and restricted rated torque for different grease types. Charts illustrate spring characteristics and axial load versus displacement for various models. An easy selection chart helps select coupling sizes based on servo motor specifications.
Critical Information: Ensure proper alignment to prevent misalignment issues, use specified torque for tightening bolts, and understand the natural frequency of feed screw systems to avoid resonance and oscillation. Options for keyway milling and the importance of using MIKI PULLEY-specified clamp bolts are discussed.
Specifications and Power Ratings: Power ratings range from 850W to 11kW, with specific models associated with each power level. Rotational speed ranges from 1500 to 6000 min-1 and torque values in N·m.
Torque Calculation and Selection Procedure: Procedure for selecting the appropriate coupling based on torque requirements, with formulas for calculating applied torque (Ta) and corrected torque (Td). The factor K is determined by load properties, with values ranging from 1.0 for constant loads to 2.25 for large vibrations. The rated coupling torque (Tn) must exceed the corrected torque (Td).
Load Properties and Usage Factors: Load properties are categorized with corresponding K factors: constant (1.0), small vibration (1.25), medium vibration (1.75), and large vibration (2.25). For servo motor drives, the maximum torque (Ts) is multiplied by a usage factor K between 1.2 and 1.5.
Limitations and Recommendations: Rated torque may be limited by the bore diameter of the coupling. Ensure the mount shaft does not exceed the maximum bore diameter. For devices with extreme periodic vibrations, contacting MIKI PULLEY is recommended.
Company and Distribution Network: Lists various group companies, distributors, and partners worldwide, including MIKI PULLEY branches in different countries and other associated companies.
Additional Notes: Includes a reference code '23.02-**-MP-SFC2(en)-008C-J018' and mentions a worldwide network of partners and distributors.
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Catalog excerpts

SERVOFLEX SFC-1

NEW OPTION ADDED High performance metal disc coupling

 Open the catalog to page 1
SERVOFLEX SFC-2

SERV OFLEX High-stiffness and low-inertia couplings Metal disc couplings developed for high-speed, high-precision positioning, and ultra-precise control of servomotors, etc. While achieving high torsional stiffness, high torque, low inertia, and high response speed, these couplings are also flexible in the parallel misalignment direction, in the angular directions, and in the axial direction. This model has a single element type that emphasizes stiffness and a double element type that emphasizes flexibility. A wide variety of options such as a tapered shaft, length-specified special order, and keyway...

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SERVOFLEX SFC-3

Heat rejection The stainless-steel plate spring reduces thermal conduction from a servo motor to the driven shaft, which also reduces variations in accuracy caused by thermal expansion. Each portion temperature transition 80 Various options to choose from Various options are available on a single-element and double-element basis. Standard specifications Clean room compatible NEW * Clean bench ISO class 6 assembly Clamp hub Material:High-strength aluminum alloy Surface finishing:Alumite treatment Element material metal disc:SUS304 collar:SUS304 * The collar material of size 080,090,100 are S45C...

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SERVOFLEX SFC-4

Single Element Type ■ Specifications Misalignment Shape type Torsional stiffness [N・m/rad] * 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 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....

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SERVOFLEX SFC-5

■ Standard bore diameters 3 Shaft tolerance Standard (option) bore diameter, d1/d2 [mm] and restricted rated torque [N・m] Nominal bore diameter Supported bore diameter for each model * 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 . * 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...

 Open the catalog to page 5
SERVOFLEX SFC-6

Double Element Type ■ Specifications Misalignment Shape type Torsional stiffness [N・m/rad] * 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 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....

 Open the catalog to page 6
SERVOFLEX SFC-7

■ Standard bore diameters 3 Shaft tolerance Standard (option) bore diameter, d1/d2 [mm] and restricted rated torque [N・m] Nominal bore diameter Supported bore diameter for each model * 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 . * 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...

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SERVOFLEX SFC-8

Tapered shaft supported Allows coupling via a clamp hub when a taper adapter is mounted on the tapered shaft of a servo motor. Shape type Torsional stiffness [N・m/rad] * 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...

 Open the catalog to page 8
SERVOFLEX SFC-9

Shape type Torsional stiffness [N・m/rad] * 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. * For other dimensions, see dimensions for single element type SFC (DA2)....

 Open the catalog to page 9
SERVOFLEX SFC-10

For length-specified special order parts SFC (DA2) type spacer length can be changed to attain the necessary distance between shafts. Specify the length in 1 mm units. Shape type * 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...

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SERVOFLEX SFC-11

For keyway milling applications If you are using a keyed shaft, we can mill a keyway in the clamping hub to your specifications. ■ Keyway milling standard JS9 keyway width standards H9 keyway width standards Nominal bore dia. Nominal bore dia. Bore Keyway Keyway Bore Keyway Keyway Bore Keyway Keyway Bore Keyway Keyway Shaft Shaft Shaft Shaft dia. height width dia. height width dia. height width dia. height width bore bore bore bore tolerance d1・d2 W1・W2 T1・T2 tolerance d1・d2 W1・W2 T1・T2 tolerance d1・d2 W1・W2 T1・T2 tolerance d1・d2 W1・W2 T1・T2 dia. dia. dia. dia. [mm] [mm] [mm] [mm] [mm] [mm] [mm]...

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