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
Construction Vehicles
- DGBB Series Normal
- DGBB Series Custom
- TRB Series Metric
- TRB Serie Inch
- ACBB Series Standard
- DR-SRB Series Standard
- DR-SRB Series Custom
- Cam-Followers Series Standard
Construction Vehicles
Construction machineries are constantly subjected to increasing demands in term of:
- Performance and cost efficiency;
- Heavy loads;
- Working conditions.
Typical applications of this sector are represented by Machines for:
- Poles, micropiles and boreholes;
- Consolidation and vibration of soils;
- Excavation;
- Lifting (of things and people);
- Processing, Preparation, Transfer of aggregates to the work site;
- Casting and Vibration of conglomerates;
- Etc.
Load Types and Bearing Choice
Many types of bearing are available that are able to meet different needs: starting from DR-SRB (double row spherical roller bearings) ideal for high bidirectional radial and axial loads, up to Cam-Followers (wheels) able to withstand very high loads radial, as well as axial loads resulting from misalignment.
Easily assembly
In order to facilitate assembly and disassembly, all types of bearings are available in different executions. For example, the DR-SRBs are also available with a conical bore, in order to be used with adapter or pressure sleeves; or, as another example, the cylindrical roller idlers are equipped with a solid pin with a threaded end.
Seals resistant to the infiltration of dust and mud
Another important aspect is certainly represented by environmental exposure that it governs the useful life of these applications. Therefore, the efficiency of the sealing is a crucial aspect to prevent the intrusion of contaminants. Specific dust and mud infiltration tests allow to optimize the design of the sealing labyrinth, respectively made by the rubber seals (with one or more lips) and by the grooves on rings (different shapes and complexity of execution).
Key requirements
1. Technical Analysis & Feasibility, for passing Approval on Final Customer Application;
2. Documentation & PPAP, Automotive level;
3. Couplings and Radial Clearance designed to meet assembly specifications;
4. Super pure 100Cr6 steel to increase bearing life;
5. Cages in pressed sheet metal or in centrifuged brass to accommodate the best behavior of the rolling elements, depending on the size of the bearing;
6. Materials, Seals and Lubricants, to ensure thermal behavior in the using conditions;
7. Sealing infiltration test, with dust and mud, thtough the use of mixtures with prescribed particle size;
8. Comparative Tests with similar product, market standard or Customized solutions.
Our challenges
1. Conditions of Use
- Machine nominal data;
- Working cycle simulation;
- Achieving the “Killer test” by Final Customer;
2. Approval Requirements
- Accelerated Life test, on bench;
- Resistance to developed heat;
- Sealing efficiency (against Dust and Mud intrusions);