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SFC Model

SFC Model
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SFC Model

Product catalog summary
Overview: This document provides comprehensive specifications and ordering information for Miki Pulley's SERVOFLEX metal disc couplings, specifically the SFC(SA2) and SFC(DA2) types. These couplings are designed for high precision and rigidity, suitable for various industrial applications.
Specifications:
  • Model Types: Various models such as SFC-002SA2 to SFC-100SA2 are listed, each with specific rated torque, misalignment tolerances, maximum rotation speed, torsional stiffness, axial stiffness, moment of inertia, and mass.
  • Misalignment Tolerances: Specifications for parallel, angular, and axial misalignments are provided, indicating the flexibility of the couplings.
  • Material and Construction: Made from aluminum alloy hubs, with types A, B, and C automatically specified based on bore diameter combinations.
Ordering Information:
  • Bore Diameter: Customers must specify bore diameters d1 (small) and d2 (large) when ordering, with a list of standard and optional bore diameters and supported shaft tolerances (h7, j6, k6).
  • Type Selection: Types A, B, and C are determined by bore diameter combination and cannot be specified by the customer.
  • Special Orders: Options for length-specified special order parts and keyway milling applications are available.
Key Considerations:
  • Dynamic Balance: Maximum rotation speed does not account for dynamic balance, which should be considered in high-speed applications.
  • Torque Restrictions: Rated torque may be restricted by the holding power of the shaft connection component, especially for smaller bore diameters.
  • Installation: Detailed dimensions and tightening torque specifications are included for proper installation and operation.
Performance Parameters: Key performance parameters such as rated torque, misalignment tolerances, maximum rotation speed, torsional and axial stiffness, moment of inertia, and mass are listed for each model.
Options and Customization: Options for tapered shaft support and length-specified special order parts are available, with the possibility of milling a keyway in the clamping hub for keyed shafts.
Natural Frequency and Torsional Stiffness: The document discusses the importance of considering natural frequency and torsional stiffness in feed screw systems using stepper or servo motors to prevent resonance and oscillation.
Procedures: Guidelines for setting the natural frequency high or adjusting it using the servomotor’s electric tuning function are provided, along with steps for selecting the appropriate coupling size based on torque and motor specifications.
Recommendations: It is advised to skip resonant rotation speeds or use electrical control systems to resolve oscillation issues, with further assistance available from Miki Pulley.
Selection Chart and Procedures: An easy selection chart helps choose the correct coupling size based on the rated output and torque of the servo motor, with a step-by-step process for determining the correct coupling size.
Load Properties: Different load properties are categorized by vibration levels, with correction factors provided to adjust torque calculations.
See more

Catalog excerpts

SFC Model-1

Metal Disc Couplings Single Element Type Specifications 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. * 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 øDB value is measured assuming that the head of the clamping bolt is larger than the external diameter of the hub. * The K dimension is the inner diameter of the element. For d2 dimension exceeding this value, shaft can be inserted only up to LF dimension to the d2 side hub. * The nominal diamete

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SFC Model-2

Standard Bore Diameter Standard (option) bore diameter, d1/d2 [mm] and restricted rated torque [N∙m] 3 Shaft tolerance Nominal bore diameter j6(Option) k6(Option) SFC-002SA2 SFC-005SA2 SFC-010SA2 SFC-020SA2 Supported bore diameter for each model ELECTROMAGNETIC CLUTCHES & BRAKES SPEED CHANGERS & REDUCERS INVERTERS LINEAR SHAFT DRIVES TORQUE LIMITERS ROSTA SERIES Metal Disc Couplings SERVOFLEX High-rigidity Couplings Metal Couplings * 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...

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SFC Model-3

Metal Disc Couplings SFC(DA2) Types Double Element Type Specifications 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 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...

 Open the catalog to page 3
SFC Model-4

Standard Bore Diameter Standard (option) bore diameter, d1/d2 [mm] and restricted rated torque [N∙m] 3 Shaft tolerance Nominal bore diameter j6(Option) k6(Option) SFC-002DA2 SFC-005DA2 SFC-010DA2 SFC-020DA2 Supported bore diameter for each model ELECTROMAGNETIC CLUTCHES & BRAKES SPEED CHANGERS & REDUCERS INVERTERS LINEAR SHAFT DRIVES TORQUE LIMITERS ROSTA SERIES Metal Disc Couplings SERVOFLEX High-rigidity Couplings Metal Couplings * 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...

 Open the catalog to page 4
SFC Model-5

Metal Disc Couplings SFC(SA2) Types Single Element Type Options Tapered shaft supported Allows coupling via a clamping hub when a taper adapter is mounted on the tapered shaft of a servo motor. Specifications Model Torsional stiffness [Nm/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...

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SFC Model-6

SFC(DA2) Types Double Element Type Options Tapered shaft supported Allows coupling via a clamping hub when a taper adapter is mounted on the tapered shaft of a servo motor. CLUTCHES & BRAKES Torsional stiffness [N・m/rad] 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) TORQUE LIMITERS 1(On one side) 1(On one side) 1(On one side) SPEED CHANGERS & REDUCERS INVERTERS LINEAR SHAFT DRIVES * 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...

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SFC Model-7

Metal Disc Couplings SFC Models Options 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. Specifications Misalignment 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) 1(On one side) * 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....

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SFC Model-8

Options 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 CLUTCHES & BRAKES SPEED CHANGERS LINEAR SHAFT DRIVES TORQUE LIMITERS H9 keyway width standards Nominal bore dia. Bore dia. Keyway width Keyway height Shaft tolerance d1・d2 W1・W2 T1・T2 [mm] [mm] [mm] h7 j6 k6 Bore dia. Keyway width Keyway height Shaft tolerance d1・d2 W1・W2 T1・T2 [mm] [mm] [mm] h7 j6 k6 SERIES Metal Disc Couplings Metal Slit Couplings SERVOFLEX High-rigidity Couplings Metal Couplings Shaft diameter Bore dia. Keyway width...

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SFC Model-9

Metal Disc Couplings SFC Models Items Checked for Design Purposes ■ Spring Characteristics SFC(SA2) ■ Axial load and amount of displacement LoadN LoadN Displacementmm Displacementmm Displacementmm ■ Spring Characteristics SFC(DA2) ■ Axial load and amount of displacement LoadN LoadN ■ arallel misalignment direction P load and amount of displacement Displacementmm Displacementmm Displacementmm LoadN LoadN

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SFC Model-10

043 ■ Special Items to Take Note of ■ Poor Mounting Examples You should note the following to prevent any problems. (1) Always be careful of parallel, angular, and axial misalignment. (2) Always tighten bolts with the specified torque. CLUTCHES & BRAKES Couplings are assembled at high accuracy using a special mounting jig to ensure accurate concentricity of left and right internal diameters. Take extra precautions when handling couplings, should strong shocks be given on couplings, it may affect mounting accuracy and cause the parts to break during use. C (1) ouplings are designed for use within...

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All Miki Pulley Europe AG catalogs and technical brochures

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.