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Miki Pulley Europe AG
SFS Model datasheets

SFS Model datasheets

Product catalog summary

Specifications
The SERVOFLEX SFS S series metal disc couplings are engineered for high-performance applications. They feature a rated torque range of 20 to 800 N·m, maximum rotational speeds from 9,500 to 25,000 min-1, and torsional stiffness values between 16,000 and 780,000 N·m/rad. These couplings can handle angular misalignments of 1° and axial misalignments from ±0.6 mm to ±1.8 mm. The largest model has a moment of inertia of 9.90 × 10-3 kg·m2 and a mass of 4.90 kg.

Dimensions
Detailed dimensions are provided for each model, including pilot bore sizes, outer diameters, and lengths. For instance, the SFS-05S model has a pilot bore range of 7-8 mm, an outer diameter of 56 mm, and a length of 45 mm, ensuring compatibility with various shaft sizes.

Standard Bore Diameter
The SFS series supports standard bore diameters from 8 mm to 60 mm, offering flexibility in design and installation.

Ordering Information
Orders require specification of the model, bore specifications, and any surface finishing needs. Bore specifications adhere to JIS standards such as H9, JS9, and P9 for precision and compatibility.

Standard Hole-Drillings
Standard hole-drilling dimensions include keyway widths and heights, set screw hole sizes, and tolerances, ensuring precise alignment and secure attachment.

Set Screw Position
Set screw positions vary by model, ranging from 7 mm to 15 mm, ensuring secure fastening during installation.

Notes
Higher rotational speeds are achievable with balancing. Moment of inertia and mass are specified for the maximum bore diameter. For technical documents, contact Miki Pulley.

Performance Parameters
Each model's rated torque, misalignment, maximum rotation speed, torsional stiffness, axial stiffness, moment of inertia, and mass are specified. Higher RPMs are possible with balancing.

Spacer Length and Bore Specifications
Standard spacers are used unless otherwise specified. Bore specifications comply with JIS standards: E9, H9, JS9, P9, and motor standards. Surface finishing includes electroless nickel plating, with materials like S45C heat-treated or equivalent.

Additional Notes
Contact Miki Pulley for further inquiries and technical support. Special arrangements for bore diameters and technical documents for standard dimensions are available upon request.

Catalog excerpts

METAL DISC COUPLINGS SINGLE ELEMENT TYPE / Key/Set Screw Type ■ Specifications Misalignment Torsional stiffness [N·m/rad] • Higher rpm possible with balancing. • The moment of inertia and mass are specified for the maximum bore diameter. Pilot bore ■ Standard Bore Diameter Model Standard bore diameter d1 • d2 [mm] 8 SFS-10S-25H-30H Bore diameter: d1 (Small diameter) ‒ d2 (Large diameter) Blank: Pilot bore Bore specifications Blank: Compliant with the old JIS standards (class 2) E9 Type: S H: Compliant with JIS standards H9 Single element J: Compliant with JIS standards JS9

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Unit [mm] Models compliant with the old JIS standard (class 2) JIS B 1301 1959 Models compliant with the new JIS standard (H9) JIS B 1301 1996 Models compliant with the new JIS standard (JS9) JIS B 1301 1996 Models compliant with the new JIS standard (P9) JIS B 1301 1996 Set screw hole [M] Keyway Keyway Bore height Nominal diameter width [d1 • d2] [W1 • W2] [T1 • T2] bore diameter Tolerance Tolerance — H7, H8 E9 Keyway Keyway Bore width height Nominal diameter [d1 • d2] [W1 • W2] [T1 • T2] bore diameter Tolerance Tolerance H9 — H7, H8 Keyway Bore width Nominal diameter [d1 • d2] [W1 • W2] bore...

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METAL DISC COUPLINGS SERVOFLEX SFS S-C – Datasheet SINGLE ELEMENT TYPE Electroless nickel coat / Key/Set Screw Type ■ Specifications Misalignment Torsional stiffness [N·m/rad] • Higher rpm possible with balancing. • The moment of inertia and mass are specified for the maximum bore diameter. ■ Standard Bore Diameter Model Standard bore diameter d1 • d2 [mm] 8 SFS-10S-C-25H-30H Bore diameter: d1 (Small diameter) ‒ d2 (Large diameter) Surface finishing Bore specifications ‒C: Electroless nickel plating Blank: Compliant with the old JIS standards (class 2) E9 H: Compliant with JIS standards H9 Type:...

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METAL DISC COUPLINGS SERVOFLEX SFS S-M-C – Datasheet SINGLE ELEMENT TYPE Conical Clamp Hub / Tapered Shaft Supported ■ Specifications Misalignment Torsional stiffness [N·m/rad] • Higher rpm possible with balancing. • The moment of inertia and mass are specified for the maximum bore diameter. Detachment screw hole M2 Bore diameter • The machining tolerance for paired mounting shafts of the hub on the friction-coupled side is h7 (h6 or g6) class. SFS-08S-20M- 16 C Size Types 　S Single element ： Bore diameter d1 Aﬃxing method 　M: Conical clamping hub Bore diameter d2 Material: S45C heat-treated...

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METAL DISC COUPLINGS SERVOFLEX SFS S-M-M – Datasheet SINGLE ELEMENT TYPE / Conical Clamping Hub ■ Specifications Misalignment Torsional stiffness [N·m/rad] • Check the Standard Bore Diameters as there may be limitations on the rated torque caused by the holding power of the coupling shaft section. • Higher rpm possible with balancing. • The moment of inertia and mass are specified for the maximum bore diameter. Detachment screw hole M2 Detachment screw hole M2 Reamer bolt M Unit [mm] Model Bore diameter

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Standard bore diameter d2 [mm] SFS-06 Standard bore diameter d1 [mm] ● Standard bore diameter d2 [mm] 15M 16M Standard bore diameter d1 [mm] Standard bore diameter d2 [mm] 25M Standard bore diameter d1 [mm] ● Standard bore diameter d2 [mm] 25M Standard bore diameter d1 [mm] ● Standard bore diameter d2 [mm] SFS-12 Standard bore diameter d1 [mm] ● Standard bore diameter d2 [mm] SFS-14 Standard bore diameter d1 [mm] • Bore diameters marked with ● or numbers are supported as the standard bore diameters. Contact Miki Pulley regarding special arrangements which may be possible for other bore diameters....

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METAL DISC COUPLINGS DOUBLE ELEMENT TYPE / Key/Set Screw Type ■ Specifications Model Torsional stiffness [N·m/rad] • Higher rpm possible with balancing. • The moment of inertia and mass are specified for the maximum bore diameter. Pilot bore ■ Standard Bore Diameter Model Standard bore diameter d1 • d2 [mm] 8 SFS-10W-25H-30H Size Type: W Double element Material: S45C heat-treated or an equivalent Bore diameter: d1 (Small diameter) ‒ d2 (Large diameter) Blank: Pilot bore Bore specifications Blank: Compliant with the old JIS standards (cla

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METAL DISC COUPLINGS SERVOFLEX SFS W-C – Datasheet DOUBLE ELEMENT TYPE Electroless nickel coat / Key/Set Screw Type ■ Specifications Model Torsional stiffness [N·m/rad] • Higher rpm possible with balancing. • The moment of inertia and mass are specified for the maximum bore diameter. ■ Standard Bore Diameter Model Standard bore diameter d1 • d2 [mm] 8 SFS-10W-C-25H-30H Bore diameter: d1 (Small diameter) ‒ d2 (Large diameter) Surface finishing Bore specifications ‒C: Electroless nickel plating Blank: Compliant with the old JIS standards (class 2) E9 H: Compliant with JIS standards H9 Type: W J:...

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SFS Model datasheets

SFS Model datasheets

Catalog excerpts

All Miki Pulley Europe AG catalogs and technical brochures