Forged Car Brake Caliper

Forged Aluminum Automotive Multi-Piston Brake Caliper: Arc-Shaped Caliper Body Forging

The forged aluminum automotive multi-piston brake caliper is a caliper body forging for performance cars. Its arc-shaped body follows the outer edge of the brake disc, with several piston-bore bosses arranged along the arc and radial mounting ears at both ends. The arc shape fits large-diameter discs, and the multi-piston layout spreads clamping pressure so the pads load evenly.

With several bore bosses along a slender arc, material must fill both the body and every boss during forging. Al Forge Tech (AFT) plans multiple forging stages and die sets for the shape (a monobloc caliper typically needs three die sets), confirms fill with QForm simulation, closed-die hot forges the body and completes T6 heat treatment in-house, then machines piston bores, fluid passages and mounting holes on 4.5-axis CNC. AFT has production experience with forged calipers for two-, three- and four-wheeled vehicles.

Key Features

• Arc-shaped body fits large discs, with piston bores along the arc
• Formed progressively over multiple forging stages and die sets
• Piston bores, fluid passages and radial mounting holes on 4.5-axis CNC
• Fluorescent penetrant, CMM and hardness inspection

Forged Aluminum Automotive Multi-Piston Brake Caliper Specifications and Manufacturing Capability

Forged Aluminum Automotive Multi-Piston Brake Caliper Manufacturing Process

1. Drawing review and DFM: we confirm alloy, load direction and critical dimensions, then run QForm simulation to predict metal flow and defect risk.
2. Die design and manufacturing: the number of die sets (for example, blocker and finisher dies) is planned around part complexity, and die contours are checked with a portable 3D scanner.
3. Hot forging: closed-die forming on 600T–8,000T hot forging presses creates a continuous grain flow that follows the part contour.
4. Heat treatment: T4 solution treatment and T6 artificial aging are performed in-house, with parameters set by alloy and strength requirement.
5. CNC machining and finishing: holes, threads and mating surfaces are machined, followed by deburring, vibratory finishing, shot blasting or anodizing as required.
6. Inspection and shipment: dimensions, hardness and chemical composition are verified with CMM, hardness testers and a spectrometer, with lot traceability kept under IATF 16949.

FAQ

What makes the arc-shaped body of a multi-piston caliper difficult to forge?

The arc body is slender, with several bore bosses along its length, so material must be distributed evenly along the arc during forging. Otherwise the body ends or bosses can underfill, or laps can form at the boss roots. AFT plans billet shape and preforms with QForm simulation, forms the part progressively with blocker, intermediate and finisher dies, and checks the form on first, middle and last pieces.

Which aluminum alloys are used for forged calipers?

Caliper material must balance strength, stiffness and sealing integrity after machining. 6061-T6 offers balanced machinability and corrosion resistance and is widely used; 7xxx alloys provide higher strength for high-load racing or performance calipers but need anodizing for corrosion resistance. AFT works with 2xxx, 6xxx and 7xxx alloys, and the final choice follows the customer's performance targets and test standards.

Can you assess forging feasibility while the Forged Aluminum Automotive Multi-Piston Brake Caliper is still in design?

Yes. Al Forge Tech works mainly as an OEM supplier, and our engineers can give design-for-manufacturability (DFM) feedback at the concept or drawing stage, such as adjusting thin ribs, abrupt section changes or draft angles to avoid laps and underfill. QForm simulation predicts metal flow early, and the results are cross-checked against our die design experience.

How do you keep the Forged Aluminum Automotive Multi-Piston Brake Caliper consistent from lot to lot?

Al Forge Tech runs incoming (IQC), in-process (IPQC) and final (FQC) inspection under IATF 16949:2016, supported by 4 Zeiss CMMs, hardness testers, a spectrometer and a fluorescent penetrant inspection line. First, middle and last pieces of every lot are checked against the die; when wear causes dimensional drift, the die is reworked to keep the Forged Aluminum Automotive Multi-Piston Brake Caliper stable across lots.

Can Al Forge Tech supply the Forged Aluminum Automotive Multi-Piston Brake Caliper from forging through machining?

Yes. Forging, heat treatment, CNC machining, surface finishing and inspection are integrated in one facility: 52 CNC machining centers (40 four-axis and 12 4.5-axis), 30 lathes (14 with robotic loading), plus broaching, burnishing and centerless grinding. The Forged Aluminum Automotive Multi-Piston Brake Caliper can be delivered as a forged blank, semi-finished or fully machined part.

Request a Quote for the Forged Aluminum Automotive Multi-Piston Brake Caliper

Developing a new Forged Aluminum Automotive Multi-Piston Brake Caliper or converting an existing part to aluminum forging? Send us your 3D/2D drawings, alloy and temper, annual volume and finishing requirements. Our engineering team will reply with a feasibility review, die plan and quotation.

• Online inquiry: Contact Us
• Email: aft@aft-forge.com.tw

To compare similar parts, browse Aluminum Forging Automobile Parts and our automotive aluminum forging applications, or visit About Us for our equipment and certifications.