Custom bearings?
The Technical Assistance Service of Silvio Colombo S.p.A. is able to develop customized products and services both in co-design with the customer's technical department and in complete autonomy based on the customer's requests.
Bearings for
Truck & Bus
- DGBB Normal Series
- DGBB Custom Series
- TRB Metric Series
- TRB Inches Series
- ABB thrust bearing for clutch
- Tone Wheel and Encoders
- Wheel hub unit, DRTRB Normal Series
- Wheel hub unit, DRTRB Custom Series
Truck & Bus’ s Sector
Within the Automotive Macro area, Truck and Bus‘s Sector requires specific needs, such as the presence of:
- Over pressures;
- High temperature;
- Water and mud contamination;
- Corrosive phenomena and exposure to rust.
Materials thermal resistance
For each application there are thermal peaks (positive and negative). Then, bearing materials are selected for the thermal resistance, in order to offer a wide range of solutions in line with the expected needs, to avoiding waste, oversizing and undersizing.
Lubricants for extreme conditions
Environmental exposure also affects applications in terms of washout and contamination (due to the presence of water, as well oxidation and salt exposures) capable to income states of corrosion and rust. Last but not least, the mechanical exigence to withstand high temperatures and pressures is also important. For all these reasons, the use of accredited premium lubricants, with guaranteed performances, is necessary.
Seals Resistance ahead the infiltration of dust and mud
As mentioned, environmental exposure governs the effective life of these applications. Therefore, the sealing system efficiency is a crucial topic in preventing the intrusion of contaminants.
Specific dust test and mud infiltration tests allow to optimize the design of the sealing labyrinth, respectively obtained matching rubber seals (with one or more lips) and ring grooves (different shapes and execution).
Key features
1. Analysis & Technical Feasibility, in order to pass the Homologation Test on Final Customer Appliance;
2. Documentations & PPAP, Automotive level;
3. Coupling tollerances and Clearances, designed to meet mounting exigences;
4. Super pure 100Cr6 steels to increase the bearing life;
5. Plastic or Steel Cages, to Gabbie in Plastica to support the best behavior of the rolling elements;
6. Seals and Lubricant Materials, to ensure the thermal behavior with applicance conditions;
7. Life Test, on bench, monitoring temperatures and vibrations;
8. Sealing infiltration test, with dust and mud, through the use of mixtures with prescribed particle size;
9. Comparative tests with similar product, market standard or customized solutions.
Our Challenges
1. Operative conditions
- Vechicle nominal data;
- Simulating the Duty Cycle;
- Achieving the“Killer test” by Final Customer;
2. Homologation needs
- Accelerated Life test, on bench;
- Resistance to developed heat;
- Sealing efficiency (ahead intrusions by Dust and Mud).