Product Parameters
| Item | Specification |
|---|---|
| Material | Cast Iron (ASTM A48 Class 35/40), Aluminum (A356-T6) |
| Manufacturing | Casting, CNC Machining |
| Piston Count | 1 – 6 pistons |
| Application | Passenger vehicles, light trucks, performance braking |
| MOQ | 10 pcs |
description
Automotive brake calipers squeeze brake pads against the rotor to slow the vehicle - the caliper housing contains the piston(s) that push the pads against the rotor, and must be rigid enough to apply even pressure across the entire pad surface. Uneven pad wear, shudder, and brake fade all trace back to caliper stiffness and piston geometry. Cast iron calipers are heavier but more resistant to fade under heavy braking - iron absorbs more heat before deforming. Aluminum calipers are lighter and dissipate heat faster, but aluminum's lower thermal deformation temperature means they are more prone to fade if pushed beyond their thermal limit.
Why Pistons Need to Apply Even Pressure
A caliper piston pushes on the back of the brake pad. If the piston face is not parallel to the pad face, one edge of the pad engages first and wears unevenly. This is why caliper piston faces are machined flat and perpendicular to the piston bore axis. In performance calipers with multiple pistons, each piston must be adjusted so all pads engage simultaneously.
FAQ
Q1: MOQ?
A1: 10 pieces for brake calipers.
Q2: Materials?
A2: Cast iron (standard for heavy-duty), aluminum (lightweight/performance).
Q3: Piston configurations?
A3: 1-piston to 6-piston depending on braking force requirements.
Q4: Manufacturing?
A4: Casting with extensive CNC machining for piston bores and mounting surfaces.
Q5: Surface finish?
A5: Machined bores, painted or powder coated exterior.
Q6: Custom configurations?
A6: Yes. Custom piston sizes, mounting bolt patterns, pad abutments.
Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.
- IATF 16949 - Automotive quality management system for safety-critical components
- PPAP / PPF - Production Part Approval Process documentation available on request
- AIAG Core Tools - APQP, FMEA, SPC, and MSA documentation on demand
- Passivation / Electropolishing - ASTM A967 procedures for corrosion resistance
- Material Traceability - Heat number tracking from raw material to finished part
From raw material to finished product, every step is controlled and documented:
- Pattern Making - Wooden or metal pattern fabrication for sand/centrifugal/investment casting
- Molding - Sand casting, shell mold, centrifugal, or lost-wax investment casting setup
- Melting & Pouring - Controlled furnace melting with chemistry and temperature monitoring
- Solidification & Shakeout - Controlled cooling with riser/removal and core shakeout
- Heat Treatment - Annealing, normalizing, or solution treatment per specification
- Machining - CNC machining, drilling, and tapping to final dimensions
- Surface Treatment - Grinding, welding, or coating as required
- Inspection & Testing - Dimensional, visual, hydrostatic, or NDT inspection
- Cleaning & Packaging - Sand removal, degreasing, rust prevention, and packaging
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