Shrink Discs
Our RINGFEDER® Shrink Discs create completely backlash-free external force-fit clamping connections. By axially tightening the tapered pressure rings, pressure is applied externally to the hub or hollow shaft, thereby creating a secure friction-locked connection between shaft and hub. The shrink disc itself is not located in the load path; torque and bending moments as well as axial and radial loads are transmitted directly at the joining surface without any intermediate element. Keys, wedges or other form-fit connecting elements are not required, thereby avoiding notch effects and achieving outstanding fatigue strength under alternating torsional loads as well as excellent concentricity characteristics. Installation and removal are performed using standard tools, without thermal joining or fitting work. Typical applications include shaft-mounted gearboxes as well as gear wheels, sprockets, belt, brake and rope pulleys, flywheels, couplings, flanges and impellers in gearbox manufacturing, material handling, mining, and the steel and cement industries. Our standard portfolio covers shaft diameters from 6 to 800 millimeters and comprises two- and three-part series as well as corrosion-resistant stainless steel versions for different installation, environmental and performance requirements. Application-specific custom solutions complement the portfolio. When correctly designed, they provide wear- and maintenance-free connections for static, dynamic and shock loads.
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Shrink Discs
Additional Models Shrink Discs
More Half and Split Types as Well as Further Stainless Steel Versions
Safety Covers
Suited for Series RINGFEDER® RfN 4061 and RINGFEDER® RfN 4161
- High-Quality Synthetic Material
- Available up to Size 140 x 230 mm
- Inner Diameter d: 49-225 mm
- Solid Shaft Diameter dw: 26-115 mm
- Length t: 22.5-67 mm
RfN 4051
Light Series for Medium Transmission Values, Ideal for Thin-Walled Hubs and Shafts
- 3-Part Design
- Inner Diameter d: 125-500 mm
- Outer Diameter D: 185-750 mm
- Overall Length L: 58-171 mm
- Torque T: 10,550-1 Mio. Nm
RfN 4061
Universally Applicable Series for Smaller Shaft Diameters and High Torques
- 3-Part Design
- Inner Diameter d: 14-200 mm
- Outer Diameter D: 37-350 mm
- Overall Length L: 15-96 mm
- Torque T: 30-87,200 Nm
RfN 4061 SST
Corrosion-Resistant Version of RfN 4061 Made of Robust Stainless Steel
- 3-Part Design
- Inner Diameter d: 14-200 mm
- Outer Diameter D: 37-350 mm
- Overall Length L: 16-102 mm
- Torque T: 30-87.200 Nm
RfN 4071
Extended Series of RfN 4061 for Larger Shaft Diameters and Highest Transmission Values
- 3-Part Design
- Inner Diameter d: 220-370 mm
- Outer Diameter D: 370-850 mm
- Overall Length L: 114-230 mm
- Torque T: 95,000-1.5 Mio. Nm
RfN 4073
Smallest Series with Minimum Moment of Inertia, Ideal for Lower Transmission Values
- 3-Part Design
- Inner Diameter d: 14-160 mm
- Outer Diameter D: 34-204 mm
- Overall Length L: 14-36 mm
- Torque T: 9-7,260 Nm
RfN 4091
Heaviest, Highly Robust Series for Maximum Transmission Values Even at Extreme Loads
- 3-Part Design
- Inner Diameter d: 50-500 mm
- Outer Diameter D: 95-850 mm
- Overall Length L: 44.5-291 mm
- Torque T: 1,800-2 Mio. Nm
RfN 4161
Proven Standard Series with Smaller Dimensions for Transmission of High Torques
- 2-Part Design
- Inner Diameter d: 18-200 mm
- Outer Diameter D: 44-340 mm
- Overall Length L: 19-95.5 mm
- Torque T: 80-124,000 Nm
RfN 4181
Size-Extended Series of RfN 4161 for Larger Shaft Diameters and Maximum Torques
- 2-Part Design
- Inner Diameter d: 220-800 mm
- Outer Diameter D: 370-1,230 mm
- Overall Length L: 115-373 mm
- Torque T: 160,000-8 Mio. Nm