Coupling technology to replace Servo couplings.
Spring Coupling verses Twin Spring Coupling
Twin Spring Coupling features
- Speeds: Up to 7000 rpm
- Peak Torque Largest Size ft lbs (Nm) 150 ft lbs (203) 500ft lbs (678)
- Standard Coupling sizes 1/2″ to 1 3/8” (12.7-35mm)
- Temperature: -20° to +290°F , (-4° to +140°C)
- Connection: Spline, Keyway, Square/Hex
- Torsionally rigid design at angles less than 10°
- Minimal backlash
- No moving parts
These couplings have been used for a number of years, for engineers looking for a flexible shaft coupling solution for high speed minimal misalignment applications.
It isn’t able to handle angles larger than 4° and the ability to handle torque is minimal.
Traditional they use layers of smaller springs, working together but attached at the input/output shaft by welding. Welding changes the metals structure of the springs making them brittle at the weld site, making it a failure point. This failure point makes the coupling while flexible not a good long term coupling due to constant failures at the connection shafts. In addition the multiple small diameter spring wire also makes it not a good candidate for a coupling that requires high torque.
The Twin Spring coupling dual spring design allows for minimal windup, non-balanced maintenance free coupling solution with the positives of increased torque capacity and increased flexibility even at speed. In addition the use of torsion springs, one of the strongest types of springs available makes the Twin Spring Coupling both capable of high torque and high flex, something that is usually only seen in a universal joint.
This means where applications that need increased torque and misalignment while still working at high speed can now be achieved without resorting to a jaw or elastomeric coupling (which still cannot work at increased angle misalignment.
Our coupling contains no internal components that require maintenance so we offer the positives of increased torque and misalignment in one coupling without the worry of maintenance.
At low angle misalignment, Twin Spring coupling maintains its torsional rigidity and continues to do so as misalignment continues to increase due to the pivoting central ball bearing which allows torque to transfer through the coupling.
Spring couplings are limited in the tradition spring coupling of 1 spring pressed into the hub at either end, these couplings are very small with a even smaller lever of torque capacity. The only coupling that has a number of springs is the Lovejoy Uniflex coupling, but still their torque output is low.
The springs they used are small in diameter and not torsion springs like we use, which makes our spring couplings capable of being able to handle more torque.
Our couping is a one piece design with integrated input/output hubs.
The maximum amount of angular misalignment on the Lovejoy coupling Uniflex model is only 5° where the Twin Spring Coupling can flex to 15° and still be used at the same high speeds.
Helical – W, DS, MCA,MC7, A and H series
Ruland – JC jaw , MJC jaw series
Guardian Coupling – 28/38, 38/45, 42/55, 48/60 series
TB Woods – L090, L100, AL100, SS100, L110, AL110, SS110, L150, AL150, SS150, L190, L225, L276 series
Lovejoy – Uniflex U-100, U-125, U-137, U-150, RRU-100, RRU-125, RRU-137, RRU-150, UFH-100, UFH-125,UFH-137, UFH-150
Miki Pulley – MM models MM-30K, MM-35K, MF models MF-30, MF-35K
R+W America – EK series
Boston Gear – FC/SSFC FC30, FC38, FC45 seriesClick to choose your industry