Knee joint with friction brake, monocentric, with lock
We have developed a knee joint especially for your therapy after the amputation, supporting initial walking and standing exercises in the course of your interim prosthetic fitting. Until you receive your final prosthetic fitting, the 3R93 provides valuable support while you get accustomed to your leg prosthesis.
We have developed a knee joint especially for your therapy after the amputation, supporting initial walking and standing exercises in the course of your interim prosthetic fitting. Until you receive your final prosthetic fitting, the 3R93 provides valuable support while you get accustomed to your leg prosthesis.
The knee joint features straightforward adjustment and functionality that can be adapted to your individual need for safety. You activate the knee flexion required for sitting down yourself by using a pull cable. Approved for a body weight up to 125 kilograms, the joint is suitable for prosthesis wearers with low to moderate mobility.
The visually attractive design of the knee joint was recognised with the product design award in 2012.
| Product type | Mechanic Monocentric |
| Mobility grade | 1, 2 |
| Max. body weight | 125 kg |
Adjustable braking effect and optimal stance-swing ratio
When the locking function is permanently deactivated, knee stability is achieved through the brake mechanism that blocks the joint in the flexion direction under load. The brake activates when a load is applied to the heel and stabilises the prosthesis during the entire stance phase. The brake also offers the desired safety when stepping down with a slightly flexed knee joint. Adjustment of the braking effect is straightforward and reproducible (Fig. 1).
To initiate the swing phase, the user relieves the load on the prosthesis, which deactivates the brake. The integrated extension assist spring, which can be optimally adjusted from the outside (Fig. 2), controls the pendulum motion of the prosthetic lower leg.
Product information
| Product type | Mechanic Monocentric |
| Mobility grade | 1, 2 |
| Max. body weight | 125 kg |
| Amputation level | Transfemoral amputation, Hip disarticulation, Knee disarticulation, Hemipelvectomy |
| User group | adults, elderly |
| Activities | Other, Rehab |
| Material | Aluminium |
Product Data
| Article number | 3R93 |
| Max. body weight | 125 kg |
| Mobility grade | 1, 2 |
| Weight | 760 g |
| Proximal connection | Pyramid |
| Distal connection | Tube clamp, 34 mm Ø |
| Knee flexion angle | 130 ° |
| System height | 82 mm |
| Proximal system height to alignment reference point | 8 mm |
| Distal system height to alignment reference point | 74 mm |
| Build height | 141 mm |
| Proximal build height to alignment reference point | 26 mm |
| Distal build height to alignment reference point | 115 mm |
| Material | Aluminium |