F1 Teams Leverage Advanced Tooling Block Technology for Unmatched Performance

The pinnacle of Formula One speed hinges on precision engineering. In the relentless push for lighter, faster cars, teams rely on carbon‑fiber components to dramatically reduce weight while maintaining structural integrity.

Trelleborg is the primary supplier of epoxy tooling blocks that form the foundation of these carbon‑fiber parts. As Chris Mellings, Manager of AEM Sales Group, explains, the process is a three‑step workflow: first, the epoxy board is bonded with a specially formulated industrial adhesive; next, a five‑axis CNC machine profiles the block into the exact shape of the component; finally, the resulting piece is sealed to create a master mold.

From this master mold, teams craft composite tooling by laying pre‑impregnated carbon fibers and curing them in an autoclave. The hardened laminate is an exact replica of the mold, providing a perfect template for the final component.

Trelleborg’s portfolio includes seven distinct tooling blocks, with the TB650 chosen by roughly 75 % of F1 teams. Introduced in the mid‑1970s, the TB650 remains the gold standard for quality, offering exceptional stability, low density, and superior surface finish.

“Our boards combine unmatched stability, minimal weight, and excellent machinability,” Mellings notes. “The integration of automated manufacturing processes further distinguishes us and secures our position as the long‑term supplier for Formula One.”

Looking at tooling blocks

Tooling blocks are engineered from epoxy resins, glass microballoons, and hardeners, cured in an oven to achieve a rigid, high‑quality matrix. They are cast into standard boards and assembled into larger blocks that match or exceed the dimensions of the intended component.

For large‑scale parts, weight is critical. Trelleborg offers a 400 kg/m³ variant—approximately half the weight of conventional market options—enhancing overall vehicle performance.

The coefficient of thermal expansion (CTE) is equally vital. A lower CTE reduces dimensional changes during curing, ensuring the final part matches the master mold with pinpoint accuracy—a requirement for Formula One, aerospace, and other high‑precision industries.

As manufacturing moves toward high‑tech composite solutions, the demand for epoxy tooling blocks is expanding. The European market currently exceeds €11 million, with applications ranging from rail, marine, and aerospace to sporting goods and renewable energy, notably wind farm infrastructure.