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Akebono recognizes every caliper must be harmonized with its brake pad materials to optimize performance. Our unique product development approach ensures the caliper design is in tune with each vehicle application. This careful attention to detail guarantees the caliper is integrated with other brake system components to optimize pedal feel and NVH performance, as well as maximize caliper performance over the life of the vehicle.
For example, we carefully match the piston seal rollback and caliper stiffness to the friction material’s characteristics. We also design the brake pad shape specifically to reduce noise, and match the pad area and volume with power absorption to meet or exceed lining life requirements.
Other Akebono caliper technology innovations include our fully sealed caliper slide mechanism and corrosion-protected pad slides. We design the caliper’s sealed two-piece pins for minimal taper wear and reduced drag. This improves lining life and helps reduce judder and noise. The pins are greased and sealed for life. During relining, a pin’s pinch bolts can be removed without contaminating the slide mechanism. The clearance pin’s large bushing prevents housing rattle and our pin design that overhangs the rotor eliminates the need for outboard housing support.
Cut Away Drawing of Akebono Caliper Guidance Pin
Akebono’s caliper slide mechanism uses a close-fit, metal-to-metal guide system that is spring loaded between the pads and anchor bracket to prevent pad rattle. No spring load exists on the caliper body. The brake pad slides in female guide slots which provide consistent contact points for reaction loads. Stainless steel pad springs line the abutment contact area and maintain low pad slide load in a corrosive environment.
Akebono Caliper Pad Slide Loads
Our caliper pad retraction springs are v-springs that separate the pads and keep them in contact with caliper fingers and pistons. This design reduces residual drag and can be applied to sliding or opposed piston calipers.
Akebono Caliper Pad Retraction Springs
During design and development, Akebono tests calipers for leakage, fluid displacement, deflection, noise, strength and endurance. We are the only company in the industry that tests 100 percent of all our calipers in production for residual drag. To the customer, this means minimal brake pulsation and optimized pedal feel.