Tobies Beteiligungsgesellschaft mbH
TL-HT Bushings
SELF-LUBRICATING PLASTIC BUSHINGS
These bushings are manufactured from plastic high temperature, polymer-based materials that are reinforced with carbon fibers, used as a replacement for metal due to low weight properties, without external lubrication requirement in applications with high mechanical.
Applications
This special material design as a replacement for metal due to weight saving properties and eliminating lubrication in applications with high mechanical requirements.
Product characteristics
The material of LT-HT is resin thermoset , polymer molding compound with chopped carbon fiber reinforcement. It has the highest strength at temperatures over 300°C and is best for lower to moderate speeds and high loads. The technical characteristics are much higher than other casting plastics and don't require any greasing.
Advantages of TL-HT Bushing
Available basic forms
Different forms are available with TL-HT Bushing technology: long tube, bushing, ,sliding plates, sheet molding.
Mating shaft
TL- HP Bushing were developed to run without lubrication. Therefore, counter shafts should be treated against corrosion. For optimum performance, a final machined mating surface finish of 0.4 to 0.8 micro-Ra is recommended.
Material data sheet
| Property | Unit | Value |
| Density | 1.52 | |
| Hardness | Shore D | 83 |
|
Water absorption: |
% |
≤0.05 |
| Elongation at break –ASTM D638 | MPa | 0.6 |
| Tensile strength | MPa | 314 |
| Tensile modulus | GPa | 45 |
| Compressive strength | MPa | 630 |
| Izod impact –ASTM D256 | J/m | 750 |
| Dry friction coefficient | - | 0.06 |
| Limit PV | MPa | 2.8 |
| Thermal expansion coefficient | mm/mm.oC | 4 ×10 -5 |
| Temperature Range | oC | 310 |
