Centaflex 90A coupling CF-A-090-0-50 | 2019608 | 778322 Centa flex A 90 pour rouleau

Centaflex A coupling - Size 90A/90AS – Reliable Coupling for Railway Powerpacks, Industrial Drives, and Gensets| 2019608 | 778324
The Centaflex A Size 90 is a highly robust and versatile elastic coupling designed for medium-duty industrial and mobile applications. Its torsionally soft construction ensures vibration damping, precise torque transfer, and misalignment compensation—all critical features in demanding environments such as railway machinery, diesel generators, and stationary pumps.

Notably, silicone versions of CF-A-90 are widely used in powerpacks for railway maintenance and track construction vehicles, where electrical insulation and thermal performance are essential.

A Trusted Choice in Railway Powerpacks
Railway service machines require low-vibration, high-reliability couplings that can perform in compact enclosures, under fluctuating thermal loads. The Centaflex A Size 90 with silicone is a preferred solution across Europe for:

Powerpack drive systems
Hydrostatic transmissions
Compact diesel-electric auxiliary units
Battery-diesel hybrid equipment
Its high thermal resistance (up to +120 °C) and insulation properties make the silicone CF-A-90 ideal for enclosed rail-mounted applications.

⚙️ Technical Overview – Size 90
Parameter Value
Nominal Torque (TKN) 1.1 kNm
Maximum Torque (TKmax) 3.15 kNm
Continuous Vibratory Torque 0.45 kNm
Max Speed 3600 rpm
Temperature Range (NR) –45 °C to +80 °C
Temperature Range (Silicone) –45 °C to +120 °C
Available Types Type 0 and Type 0–S
Shore Options 50 and 60
ATEX Certified Yes
? Applications Beyond Rail
Diesel engine–driven pumps
Standby generators and light mobile gensets
Industrial hydraulic systems
Marine auxiliary drives
Agricultural and forestry machines
? Type 0 vs. Type 0–S – Mounting Comparison
Type Design Ideal Use
Type 0 Axial and radial bolting Standard engine-to-shaft configurations
Type 0–S Includes pins for axial movement Systems needing easier maintenance or thermal float
Shore Hardness: Why You Must Match the Original
Centaflex A couplings are not generic rubber parts. Each Shore hardness—50 or 60—has a very specific dynamic behavior, directly affecting torsional stiffness, resonance characteristics, and system lifespan.

Replacing a worn element with the wrong Shore hardness can lead to premature failure, noise, or torsional resonance.

Always match the original Shore value (usually marked on the coupling or machine documentation). These elements are often selected during OEM design together with TVA (Torsional Vibration Analysis) and machine-specific calculations.

Silicone elements are particularly recommended when elevated temperatures or electrical insulation is critical—especially in railway and hybrid systems.

? Clarification: D.B.P. – 2019608 and JAP.Pat. – 778322
If your old coupling is marked with D.B.P. – 2019608 or JAP.Pat. – 778322, please note that these are international patent numbers, not product codes. They confirm the component is a genuine CENTA original, but do not specify the exact model