A big “twist” on Ringfeder’s standard shrink disc

Given the range of applications for shrink discs, Ringfeder has always offered a wide range of sizes. But sometimes, engineers may need a larger model than they carry. In these cases, Ringfeder will customize one of its standard shrink discs to fit a customer’s needs—which is exactly what they did for an industrial gearbox company in Brazil.

The company recently consulted Ringfeder for a shrink disc that had to fit a 900-mm hollow shaft. Due to the large size, they customized one of their standard shrink discs—all while meeting the company’s requirements for high torque and fast production turnaround. The resulting shrink disc is now the largest shrink disc installed in Brazil.

Gearbox Challenges and Solutions

To fit the 900-mm hollow shaft, Ringfeder opted to specially design its RfN 4181 Series of heavy-duty shrink discs, which includes an additional guide mechanism on the inner ring for maximum torque transmission.

To ensure the shrink disc would safely stand up to the high-torque demands of the gearbox, Ringfeder focused on the quality of the raw materials. They also selected machining tools that would get the job done on a timeline and budget that fit the customer’s needs.

This shrink disc is now the largest shrink disc installed in Brazil.

Shrink Discs in a Nutshell

Shrink discs are keyless external locking devices. Compared to keyed devices, shrink discs are fast and easy to install. They also offer an even distribution of locking forces. Once you place this device over the hub and shaft, simply tighten the locking screws. This draws the disc’s outer and inner thrust rings together—compressing the hub tightly around the shaft. Ringfeder’s standard shrink discs are available with IDs between 14–500 mm.

Ringfeder
www.ringfeder.com