Special design & material
Split Bearing Cages
Plastic cage designs assembled from two halves or multiple segments to suit the bearing arrangement.
Application and design
A split design can be considered when the assembly route makes a one-piece cage difficult to install. The number of segments and their joining method are defined by the bearing and installation requirements.
Supply scope: Custom plastic cage segments. Rolling elements, bearing rings and complete split bearings are not included.
Materials & customisation
The material must be reviewed together with joint geometry, assembly deformation and operating conditions. Polymer grade and validation requirements are agreed for the project.
Choose from the nylon materials below for your cage design and operating conditions. The specific resin grade is agreed for the project.
| Material code | Material description |
|---|---|
| PA66 | Unreinforced polyamide 66 |
| PA66-GF10 | 10% glass-fibre-reinforced polyamide 66 |
| PA66-GF15 | 15% glass-fibre-reinforced polyamide 66 |
| PA66-GF25 | 25% glass-fibre-reinforced polyamide 66 |
| PA66-GF30 | 30% glass-fibre-reinforced polyamide 66 |
| PA46 | Unreinforced polyamide 46 |
| PA46-GF15 | 15% glass-fibre-reinforced polyamide 46 |
| PA46-GF25 | 25% glass-fibre-reinforced polyamide 46 |
| PA46-GF30 | 30% glass-fibre-reinforced polyamide 46 |
Typical raw-material property ranges
| Property | PA66 | PA46 |
|---|---|---|
| Densityg/cm³ | 1.13–1.36 | 1.18–1.41 |
| Tensile stress, dryMPa | 85–190 | 100–210 |
| Tensile modulus, dryGPa | 3.0–10.0 | 3.3–10.0 |
| Melting point, DSC°C | ≈260 | ≈295 |
| Heat deflection temperature°C · 1.8 MPa | 75–250 | 190–290 |
Ranges summarise the example resin grades below for initial material selection. Finished-part performance is reviewed for the selected grade and application. Tensile stress uses dry yield or break values. Continuous operating temperature is assessed separately for the grade and conditions.
Reference grades and manufacturer data
Design requirements
- Bearing and assembly route
- Describe the bearing structure, rolling elements and the reason for a split cage.
- Segment design
- Provide the number of segments, joining geometry, pocket arrangement and assembly sequence.
- Fit and operation
- Identify installation clearances, temperature, lubrication and the conditions at the segment joints.
Custom development and project enquiries
Boerjing develops molds and manufactures precision injection-molded plastic parts from customer drawings or approved samples. We support mold trials, sample approval, small-batch validation and repeat production.
Start with the component and intended use. Share available drawings or samples, material requirements and expected quantities.