The SFC model is a metal disk type coupling with lightweight and high-strength aluminum alloy used for the clamp hub. It has a high torsional rigidity and responsiveness. The SFC-SA2 with single element and ultrahigh rigidity and the SFC-DA2 with double elements and flexibility are available. Each type has a green design corresponding to the RoHS.

Permissible torque	0.6Nm to 250Nm
Drilled bores	4mm to 45mm
Backlash	Zero

The SFS model are metal disk type couplings. Carbon steel is used for the body material. Very high torsional rigidity assures accurate shaft rotation and ultra precision control. A single element type with high rigidity, double-element type with flexibility (two elements are used through a spacer plate) and floating type with a flange between double elements are available. Assembly finished or partly-finished product, frictional fastening or key fastening of shaft, or taper shaft correspondence is available for each type.

Permissible torque	20Nm to 800Nm
Drill bore additional processing range	7mm to 60mm
Backlash	Zero

The SFM and SFF model are metal disk couplings with high precision and speed control developed for machine tools. The SFM model is designed for a main shaft of machine tool, and the SFF model is designed for a feed shaft of machine tool. For the SFM model, a centering mechanism is set for the pressure flange as well as flange part to respond to a high-precision mounting. To reduce a wind roar during high-speed rotation, the outer circumference of the plate spring is covered with a flange to reduce irregularities of shape. By the newly developed plate spring, both models have a class-leading torque transmission.

Permissible torque	200Nm to 800Nm/SFM , 70Nm to 300Nm/SFF
Drilled bores	28mm to 80mm/SFM , 18mm to 60mm/SFF
Backlash	Zero

The Largest Model Among SERVO FLEX : Metal Disk Couplings The maximum flange outer diameter is ø 262 mm and the permissible torque is 8000 N·m. The most rigid S type has a torsional stiffness of 10,780,000 N·m/rad at maximum. This series is available with the high-flexibility G type, where a high-rigidity single-element S type and two elements are positioned respectively and are jointed with a floating shaft at the middle part. This is also available for length setting according to customers' requests.

Permissible torque	1000Nm to 8000Nm
Drill bore additional processing range	22mm to 115mm
Backlash	Zero