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Tufnol SRBF Grade 6F/45 is a high-performance, cotton fabric-based epoxy laminate renowned for its exceptional electrical properties, dimensional stability, and outstanding machinability. Manufactured by Tufnol Composites, this material combines a specially modified epoxy resin with fine-weave cotton fabric, resulting in a laminate that offers high insulation resistance, electric strength, and exceptional resistance to surface electrical tracking.
This versatile grade is used for a broad range of applications where precision and a high-quality machined finish need to be combined with electrical or mechanical performance. It is used for rotor blades in compressors, slip ring assemblies in helicopters, windshield components on commercial aircraft, high vacuum components, slot wedges, coil supports in turbine generators, labyrinth seals, insulating gears in scientific instruments, electrical mounting plates, and large electrical terminal blocks.
Property | Typical Result | Units |
---|---|---|
Cross Breaking Strength | 170 | MPa |
Impact Strength, Notched, Charpy | 4.6 | kJ/m2 |
Compressive Strength, flatwise | 290 | MPa |
Compressive Strength, edgewise | 190 | MPa |
Shear Strength, flatwise | 100 | MPa |
Typical Result | Units | |
---|---|---|
1.6mm thk. | 30 | mg |
3mm thk. | 35 | mg |
6mm thk. | 45 | mg |
12mm thk. | 55 | mg |
Electric strength, flatwise in oil at 90°C
Typical Result | Units | |
---|---|---|
- 1.6mm thk. | 15 | MV/m |
- 3mm thk. | 12 | MV/m |
- 6mm thk. | 10 | MV/m |
Electric strength, edgewise in oil at 90°C | 80 | kV |
Insulation resistance after immersion in water | 3 x 1011 | ohms |
Loss tangent at 1 MHz | 0.040 | - |
Permittivity at 1 MHz | 4.3 | - |
Comparative tracking index | 800 | - |
Relative Density | 1.36 | - |
Maximum working temperature**
Typical Result | Units | |
---|---|---|
- Continuous | 130 | °C |
- Intermittent | 150 | °C |
Thermal Classification | Class B | - |
Thermal conductivity through laminae | 0.36 | W/(mK) |
Thermal expansion in plane of laminae | 1.8 | x 10-5/K |
Specific heat | 1.5 | kJ/(kgK) |
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Scheduled shipments give you flexibility with your deliveries. Instead of choosing just one delivery date, you can choose as many shipment quantities and dates as you like.
To use Scheduled Shipments you will need to sign up for a Credit Account. A link is available at the top of the page or just click HERE.
Alternatively call us on 01908 222211 for all the information you need regarding gaining access to Scheduled Shipments.
Shipment Order No. | Shipment Date | Shipment Quantity |
---|---|---|
#56534 | 1/1/2025 | 1000 |
#56534 | 15/2/2025 | 1000 |
#56534 | 12/3/2025 | 1000 |
In the above example the customer has ordered 3000 parts, but the customer wants 3 seperate shipments of 1000 parts. We will then ship in accordance with your required deliveries.