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Servoflex SFR Catalog

Servoflex SFR Catalog
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Servoflex SFR Catalog

Product catalog summary
Overview: The document provides comprehensive technical specifications and ordering information for MIKI PULLEY's SERVOFLEX high-damping couplings, designed for high-speed, high-precision servo motor operations. These couplings feature a newly developed rubber element for superior damping performance, reducing vibration and resonance issues.
Specifications: The couplings are constructed with a rubber element made from HNBR, alloy steel bolts with trivalent chrome treatment, and high-strength aluminum alloy clamp hubs with alumite treatment. The integrated structure combines hard rubber and inserts, optimized using CAE and FEM systems. Three types (A, B, C) are automatically specified based on bore diameter combinations.
Performance: The couplings offer no backlash due to frictional power transmission and low inertia for high-speed operations. They provide excellent damping performance compared to metal disc couplings, effectively reducing counterforces in axial and parallel misalignments.
Options and Variations: Available options include tapered shaft adaptors, additional keyway milling, and shaft tolerance adjustments (j6/k6). A wide range of bore diameters and configurations are supported, with specific torque ratings and shaft tolerances.
Ordering Information: The document outlines the process for selecting bore diameters (d1 and d2) and supported shaft tolerances (B, J, K). It includes a detailed table of standard bore diameters, shaft tolerances, and restricted torque ratings.
Dimensions and Specifications: Detailed dimensions and specifications are provided for each model, including rated torque, misalignment tolerances, maximum rotation speed, torsional and axial stiffness, moment of inertia, and mass. Types A, B, and C are automatically specified and cannot be chosen by the customer.
Installation Procedures: The document outlines the installation process, emphasizing the importance of ensuring no axial compression or tensile force is applied before tightening clamping bolts. It provides the recommended tightening torque ranges for different models and bolt sizes.
Standards and Tolerances: Keyway milling standards and shaft tolerances are detailed, with options for different shaft tolerances (h7, j6, k6) based on the bore diameter. The document highlights the importance of consulting Miki Pulley for special arrangements outside the standard specifications.
Recommendations: Recommendations include using a calibrated torque wrench for bolt tightening and ensuring proper alignment during installation to prevent interference with coupling elements.
Mounting Procedures: Ensure clamping bolts are loosened and remove any contaminants from shaft surfaces. Avoid excessive force when inserting couplings. Ensure couplings move smoothly along axial and rotational directions. Use round shafts for optimal performance and avoid undesirable shaft placements that could damage couplings.
Handling Precautions: Operate within a temperature range of -20℃ to 80℃ and avoid environments with water, oil, or chemicals. Do not tighten clamping bolts until the mounting shaft is inserted.
Special Considerations: Prevent parallel, angular, and axial misalignment. Tighten bolts with specified torque. Consider torsional natural frequency in design to prevent resonance and oscillation in feed screw systems.
Spring Characteristics and Load Displacement: Graphs indicate the relationship between parallel misalignment, axial load, and displacement for various models, highlighting the importance of maintaining proper alignment and load conditions.
Selection and Design Considerations: Select coupling size based on servo motor specifications. Consider natural frequency and torsional stiffness in design to avoid resonance. Use service factors based on operating conditions to determine corrected torque applied to the coupling.
Specifications and Selection Criteria: The document outlines the selection criteria for couplings based on the rated output and torque of servo motors. It emphasizes the importance of checking manufacturer specifications due to varying torque characteristics. The rated torque of a coupling may be limited by its bore diameter, necessitating the selection of a suitable coupling if the required shaft diameter exceeds the maximum bore diameter.
Feed Screw System Considerations: In systems using stepper or servo motors, resonance and oscillation can occur due to natural frequencies. The document advises skipping resonant speeds or using electrical control systems to resolve oscillation. It highlights the need to consider torsional stiffness and moment of inertia during the design stage.
Natural Frequency Calculation: The natural frequency of a feed screw system is determined using the torsional stiffness of the coupling and feed screw, and the moments of inertia of the driving and driven sides. The document provides formulas for calculating these parameters.
Service Factors: Service factors based on operating temperature, starting/braking frequency, operating time, and load properties are provided. These factors are used to calculate the corrected torque applied to the coupling.
Keyway Milling Options: Options for keyway milling are available, but care must be taken not to exceed the coupling's permitted torque. The document advises against using set screws over the keyway as it may lower clamp performance.
Global Network: The document lists various global partners and distributors associated with Miki Pulley, indicating a wide network for distribution and support.
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Catalog excerpts

Servoflex SFR Catalog-1

MIKI PULLIY Resonance damping coupling HI MIKI PULLEY FLEX series

 Open the catalog to page 1
Servoflex SFR Catalog-2

High damping couplings ewl can eed control t at can a o d re onance n a w de ran e o o erat n E cellent damping performance The SERVOFLE SFR rubber element couplings provide better damping performance than standard metal disc couplings. Metal disk coupling High-damping rubber element coupling Shaft counterforce is also reduced Assembly structure with certain gap greatly reduce the reaction force in the eccentric and axial directions. Comparison of counterforces for parallel misalignment Comparison of counterforces along the axial direction Single-layer rubber element coupling MIKI PULLEY SERVOFLEX...

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Servoflex SFR Catalog-3

ariations and options a ailable Low inertia by suitable hub shape depends on bore size. You can also select various options. Low inertia contribute high speed operation. Three kind of option available. Tapered shaft adaptor Shaft tolerance j /k acceptable Additional keyway milling * 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. Integrated element structure of hard rubber and insert Clamp hub and element is assembled by friction force of tightening bolts. Optimal design with the help...

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Servoflex SFR Catalog-4

* 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 d3 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 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 SFR-010 are the values when d2 is 08 mm. 004 MIKI PULLEY SERVOFLEX

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Servoflex SFR Catalog-5

Standard (option) bore diameter, d1/d2 [mm] and restricted rated torque [N-m] * The shaft tolerance for standard bore diameter is h7 (h6 or g6): designation B. * Shaft tolerances j6/k6: designations J/K are optional, and are only supported for bore diameters marked with O . * 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...

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Servoflex SFR Catalog-6

Option Tapered shaft supported Allows coupling via a clamp hub when a taper adapter is mounted on the tapered shaft of a servo motor. * 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...

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Servoflex SFR Catalog-7

If you are using a keyed shaft, we can mill a keyway in the clamping hub to your specifications. H9 keyway width standards JS9 keyway width standards * We can also handle standards not listed above. Consult MIKI PULLEY. (Small diameter) Affixing method - t Affixing method KJ: k6 shaft + JS9 keyway — Bore diameter d2 (Large diameter) For nominal bore diameter, select d1 (small diameter) -d2 (large diameter) in that order. If d1=d2 (same diameters), select B, J, and K in that order. B-J-K-BH-BJ-JH-JJ-KH-KJ Standard (option) bore diameter, d1/d2 [mm] and restricted rated torque [N-m] * The shaft...

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Servoflex SFR Catalog-8

■ Axial load and amount of displacement ■ Parallel misalignment direction load and 008 MIKI PULLEY SERVOFLEX

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Servoflex SFR Catalog-9

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. (5) Insert and mount each shaft far enough in that the paired mounting shaft touches the shaft along the entire length of the clamping hub of the coupling (LF dimension), as shown in the diagram below, and does not interfere with the elements or the other shaft. (1) Couplings are designed for use within an operating temperature from -20‘C to 80‘C. Avoid using it under the environment where water, oil, acid, alkali, ozone,...

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Servoflex SFR Catalog-10

BC Tapered shaft supported Option d2 10 ■ Options for keyway milling Options for keyway milling are available on request. However, because they are designed such that torque is tranferred to the friction coupling by the clamp mechanism, care should be taken not to exceed the coupling's permitted torque during use. Note also the following issues: (1) Only ever use keys that are no wider than the keyway. Using keys that are a tight fit could results in damage during mounting or operation. (2) The positional accuracy of keyway milling is visual. If positional accuracy relative to keyway hubs is...

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Servoflex SFR Catalog-11

■ Service factor based on load property: K1 (1) Find the torque, Ta, applied to the coupling using the output capacity, P, of the driver and the usage rotation speed, n. ■ Service factor based on operating time: K2 (2) Determine the service factor K from the usage and operating conditions, and find the corrected torque, Td, applied to the coupling. ■ Service factor based on starting/braking frequency: K3 * Please consult MIKI PULLEY for assistance with items marked with [*]. ■ Service factor based on operating temperature: K4 Td [N-m] = Ta [N-m] x K1 x K2 x K3 x K4 (3) The rated torque of the...

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Servoflex SFR Catalog-12

World Wide Network ■ PARTNERS ■ CENTA ANTRIEBE KIRSCHEY GmbH ■ KENDRION INTORQ GmbH & Co. KG ■ MASCHINENFABRIK MOENNINGHOFF GmbH & CO KG ■ CENTA TRANSMISSIONS FAR EAST PTE., LTD. ■ HELICAL PRODUCTS COMPANY, INC. ■ GROUP COMPANIES ■ MIKI PULLEY (TIANJIN) CO., LTD. ■ MIKI PULLEY (TIANJIN) CO., LTD. SHANGHAI BRANCH ■ VERBINDUNGS-, MESS- UND ANTRIEBSTECHNIK GmbH ■ MIKI PULLEY (HONG KONG) CO., LTD. ■ MIKI PULLEY (INDIA) PVT. LTD. ■ MIKI PULLEY (KOREA) CO., LTD. ■ MIKI PULLEY (EUROPE) AG ■ MIKI PULLEY (TAIWAN) CO., LTD. ■ MIKI PULLEY (THAI) CO., LTD. ■ DISTRIBUTORS ■ NAISMITH ENGINEERING & MANUFACTURING...

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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.
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