• High Stiffness Servo Flex Line-up

Metal Disc Couplings

What is A Metal Disc Coupling?

A metal disc coupling is a device that connects two shafts to transmit torque and rotation, while compensating for any existing shaft misalignment. Commonly used in servo motor applications and high speed machinery, metal disc couplings are designed to be flexible to handle any shaft misalignment, while providing high torsional strength for precision under high torque and high speeds.

High Stiffness, Low Inertia Servo Motor Couplings

Miki Pulley developed the SFC line of metal disc couplings to fulfill the high performance requirements of servo motor applications. Engineered for high speed, superior precision, and exact positioning, the SFC offers unparalleled value.   The flexible metal disc elements allow for varying amounts of shaft misalignment, while providing superior torsional rigidity, low inertia, high repeatability, and high speed capability.  All models are backlash free.

Through Finite Element Analysis (FEA) in the rigorous research and development phase, Miki Pulley engineers designed an optimal size and shape of the metal disc element. Multiple disc elements are combined into a proprietary disc pack assembly for the coupling.  The couplings are available in a Single-Flex design (one disc pack) or a Double-Flex design (two disc packs separated by an intermediate member). The Single-Flex model emphasizes torsional stiffness , while the Double-Flex model provides greater flexibility to accept shaft misalignment. 

Features & Benefits of SFC Couplings

  • Zero backlash
  • Ultra-low inertia
  • Ultra-high stiffness
  • Simple yet reliable design
  • High response in demanding applications
  • Minimizes conductive heat transfer from motor to output shaft
  • Single-Flex and Double-Flex configurations available
  • Hub Mounting options: Clamp-style, Keyway / Setscrew style, or Tapered Shaft Adaptor
  • Maximum rated torque: up to 5,900 ft-lbs (8,000 Nm)
  • Bore range: ø3 ~ 115mm
  • Operating temperature range: -30° to 120° C (-22° to 248°F)

Metal Disc Coupling Applications

We offer an extensive line-up of metal disc couplings that serve a wide range of demanding applications. Uses include:
  • Servo Motors
  • Stepper Motors
  • High Speed Machine Tools
  • Semiconductor Manufacturing Equipment
  • Printing Presses
  • Linear Actuators
  • Surface Mount Technology (IC chip mounting)
  • Packaging Machines

The Metal Disc Couplings You Need

Miki Pulley’s SFC couplings are the perfect solution for high speed, high torque applications. Contact us to collaborate on your machine design today!