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Last Updated: Apr 25, 2025 | Study Period: 2023-2030
Steel brake pistons are susceptible to corrosion, which can lead to leaks and provide minimal protection against heat transfer from the brake pad to the braking fluid. Phenolic resin is a highly heavy-duty, solid substance that serves as an insulator, keeping heat away from the calliper body and brake fluid.
Using phenolic plastic, calliper pistons are known as phenolic pistons. Phenolic plastic is incredibly durable, making it the appropriate material for use in brake callipers since it resists heat, rust, and oxidation.
Pistons for brake callipers can be composed of steel, aluminium, or phenolic plastic. Both steel and aluminium are robust and lightweight, but aluminium may overheat the braking fluid and produce brake fade. Both metals also corrode.
The Global Automotive Phenolic brake piston market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
The Role of the Caliper Piston in Brake Roughness. Due to phenolic pistons' much better low-pressure range compliance than steel ones, which encourages reduced roughness propensity, the significance of piston material qualities in braking torque variation sensitivity and roughness was determined. A contemporary generation of direct-acting, servo-hydraulically actuated brake component compression test stands was also shown to be effective in characterising this feature.
A later section of study will examine the calliper piston's impact on the thermal roughness of a brake corner and brake torque variation sensitivity (BTV sensitivity). With and without a brake pad and a multi-layer bonded noise shim, it comprises measurements of the hydraulic stiffness of pistons in a "wet" fixture.
Inertia dynamometer experiments of BTV sensitivity against a machined 20-micron thickness variation rotor with several (prototype) phenolic piston geometries, as well as steel pistons with two distinct piston to bore clearance levels followed. Multiple phenolic piston geometries and steel pistons with tighter and looser piston to bore clearances were tested for thermal roughness at higher temperatures.
Recognising that the material composition, shape, and clearance to the bore of the calliper piston affect braking performance.