D-47803 Krefeld
Girmesgath 5

Phone 02151-835-0
Fax     02151-835-200/321


Leave the Stone Age

It will change your mind

Sometimes it just happens. You come across ideas that will make your life much easier. And before you know it, you don’t even remember how you managed without it. Ringfeder’s new air operated coupling, 5050 AM/RL, is all that and much more...

Conversion of the bolt couplings 40 mm A/B and 50 mm A/B to AM/RL

Details and options for conversion of the bolt couplings 40 mm A/B to 4040 AM/RL
and 50 mm A/B to 5050 AM/RL

RINGFEDER goes YouTube

Service DVD Type 5050

As of now all service videos by the channel RINGFEDER Anhängerkupplungen are available on   Youtube now in german as well as in english language.

Via this social network you can access all service videos all over the globe and also in transit.

This service is availablefor every one e.g. drivers, workshops or trades.

By the use of multimedia institutions RINGFEDER enlarges his service section.

Currently there are 21 service videos online concerning following issues:


  • Assembly


  • Operation


  • Operational test
  • Coupling bolt: Wear test
  • Coupling bolt: Measuring the axial clearance
  • Coupling bolt: Checking the clearance in the flower guide bushing
  • Controlling the bearing clearance
  • Controlling wear oft the wear plate
  • Controlling axial play of the bearing
  • Coupling body: Controlling pivot bearing for longitude play
  • Coupling body: Control for smooth running
  • Coupling: Greasing with permanent lubricant


  • Disassembling coupling bolt and pertaining locking springs
  • Disassembling hand lever and ratchet lever
  • Disassembling coupling body and guide bush
  • Exchanging plastic bearing bushes
  • Exchanging rubber springs
  • Disassembling wear plate


  • Changing coupling head: Type 5050 A > AM
  • Sensor assembly
  • Changing handles: Type 5050 A > B

Further inputs and topics round the RINGFEDER couplings are in progress.
Suggestions about further topics are always appreciated./
We always appreciate any suggestions about further issues.