Spring Couplings are another form of flexible shaft coupling but usually down at the lower end of the market, as they usually have a low ability to transfer torque and to run at high speeds, so they normally aren’t considered to replace couplings like uni joints or jaw couplings.
Spring couplings have one thing in common, springs but the biggest issue they have is how they are attached to the input and output hub, that’s where the difference is.
Spring couplers are used for a number of reasons mainly to keep maintenance low, no bearings to grease and no spider inserts to replace.
Spring couplings like the Lovejoy Uniflex range are welded on to the hubs, which is not good as the welding process changes the make up of the metal in the spring, making it more likely to snap with increased torque, we know we found that out the hard way.
Other spring couplings fold the end of the spring coil into a slot on the hubs, that also has two issues, one the torque is concentrated on the bend of the spring making it more likely to snap as torque is increased. Adding to that at higher speed the spring has a tendency to jump or be forced out of the slot with increased torque as well.
So how does Twin Spring Coupling make its spring couplings so it isn’t welded and isn’t made with the spring coil slot?
We use a friction fit technique which means the springs screw onto the hubs and cant be unscrewed. This means no welds and no bent coils.
In addition to that we use torsion springs so springs that are able to take a lot more torque.
So what does this offer you?
It offers a highly flexible coupling so to be as flexible as most universal joints but also due to the torsion springs able to handle a lot more torque, torque similar to jaw couplings, universal joint couplings and elastomeric couplings, like grid flex type couplings.
This offers a number of advantages.
- No constant lubrication like that with both block and pin/friction bearing, and needle bearing universal joints, while offering the same flexibility.
- No spider or elastomeric inserts to have to maintain and replace. No UV exposure issues.
- No broken springs to have to deal with.
- Dual spring design absorbs equipment vibration.
- Bi directional.
- A maintenance free 1 piece couplings, needing only annual inspection and lubrication to the central ball bearing.
- Available in 4140 alloy or T6061 Aluminum construction.
So while its a spring coupling Twin Spring Coupling offers the same performance of both a universal joint coupling and jaw coupling combined.
Think a flexible coupling, more flexible than a Jaw coupling with no inserts to have to maintain or replace.
Better still a flexible coupling with the power of a universal joint but with no bearings (Block and Pin or Needle) to have to constantly grease and replace when worn.
So as a hybrid coupling why would you keep buying jaw couplings or universal joints, no elastomeric insert or bearing crosses to worry about.
Spring Couplings redefined
With the 3 different models available and now available in 2 material types, 4140 alloy and T6061 T6 aluminum, Twin Spring Coupling can replace most power transmission couplings available on the market today.
The TSC150 is capable of 25 degrees misalignment, 150ft lbs. of nominal torque and speeds of up to 7000 rpm.
The TSC300 is capable of 45 degrees misalignment, 300ft lbs. of nominal torque and speeds of up to 7000 rpm.
The TSC500 is capable of 25 degrees misalignment, 500ft lbs. of nominal torque and speeds of up to 7000 rpm.