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Ringfeder
Ringfeder is a German manufacturer of shaft-hub connections and couplings for mechanical power transmission, with locking assemblies, shrink discs and locking elements as core product groups. These keyless connections clamp hubs to shafts by friction, so no keyway weakens the shaft and there is no backlash.
Read more about Ringfeder 
Brand profile
About Ringfeder
- Founded
- 1922
- Headquarters
- Groß-Umstadt, Germany
- Speciality
- Shaft-hub connections and couplings
- Listed with us
- 1 product
Ringfeder products by category
Ringfeder is a German manufacturer of shaft-hub connections and couplings for mechanical power transmission, with locking assemblies, shrink discs and locking elements as core product groups. These keyless connections clamp hubs to shafts by friction, so no keyway weakens the shaft and there is no backlash.
Keyless shaft-hub connections
Ringfeder publishes numbered RfN series with tech papers, for example locking assemblies in the RfN 70xx family, shrink discs in the RfN 40xx family and locking elements such as the RfN 8006. Each tech paper lists sizes, transmissible torque and axial force, screws and tolerances.
Typical uses
Ringfeder connections are used where gear wheels, sprockets, pulleys, couplings and brake discs have to be fixed on a shaft: industrial drives, conveyors, wind and mining equipment, and general machine building.
Ordering through Seven Star LLC
Seven Star LLC lists Ringfeder series from the official tech papers and quotes by shaft diameter, hub dimensions and torque. Browse the products below for specifications.
Request a Quote for Ringfeder Products
Looking for Ringfeder parts not listed here, or pricing for a project? Send us the part numbers and quantities. Seven Star LLC sources genuine Ringfeder products for customers across Oman and the GCC and replies with a formal quotation.
- Genuine OEM products
- Supply across Oman & the GCC
- Formal quotation from our sales team
Free, no-obligation quotation · takes about 1 minute
Other enquiries: [email protected] · WhatsApp
Frequently Asked Questions
What does Ringfeder make?
Ringfeder makes keyless shaft-hub connections such as locking assemblies, shrink discs and locking elements, plus couplings for power transmission.
What is a locking assembly?
A friction-based clamping element that fixes a hub on a shaft without a key; tightening the screws expands it against shaft and hub.
What does a shrink disc do?
It clamps a hub onto a shaft through an external ring pair and screws, transmitting torque by friction without keyway or spline.
Where are Ringfeder technical papers found?
On the Ringfeder website, which publishes a tech paper per RfN series with sizes, torque values and tolerances.
Is Seven Star LLC a distributor of Ringfeder?
No. Seven Star LLC is an independent supplier in Muscat that sources genuine Ringfeder products on request and does not hold any official distribution status.