Brake Master Cylinder Metal Cups

Tight Tolerance Control
Consistent geometry is essential for effortless cylinder assembly. Our deep drawing capability ensures:
Precision Fit: Outer/inner diameter and height controlled down to 0.01mm.
Uniform Wall Thickness: Prevents material thinning or micro-cracks under hydraulic strain.
Burr-Free Edges: Precision trimming prevents damage to adjacent rubber seals during automated insertion.

Full Material Traceability & Performance
Raw materials are selected for deep-draw formability and operational durability:
Options: SPCC/DD13 for optimal forming; SUS304/316 for superior corrosion resistance.
Traceability: Every batch includes original Mill Test Certificates (MTR) for 100% raw material integrity.

Optimized Surface Finish
Operating against flexible rubber seals under high pressure requires a flawless contact interface:
Seal Protection: Ultra-smooth surfaces prevent rubber friction, fluid leakage, and pressure loss.
Corrosion Resistance: Plating and E-coating options withstand up to 720 hours of salt spray testing.

Stringent Quality Assurance & PPAP Support
Engineered for zero-defect automotive production lines:
In-Process SPC: Real-time statistical process control during deep drawing operations.
100% Optical Sorting: Automated high-speed cameras screen for surface defects and dimensional outliers.
Full Documentation: PPAP Level 3 packages provided for seamless customer audit and approval. 

Material Testing & Slitting: Raw coils are verified for thickness, hardness, and chemical composition.
Multi-Stage Deep Drawing: Progressive dies form flat metal sheets into deep cups with uniform wall thickness.
Trimming & Piercing: Secondary operations establish exact height specifications and clean edges.
Surface Treatment: Ultrasonic cleaning followed by anti-rust oiling, zinc plating, or E-coating.
Final Inspection & Packaging: 100% optical sorting and CMM checks before sealing in VCI anti-rust bags and export pallets. 

Engineering Support: Production strictly matching customer 2D/3D CAD drawings and custom specifications.
Sample Lead Time: 7 – 15 days for prototypes and trial samples.
Mass Production Lead Time: 20 – 30 days depending on order volume.
Packaging: VCI Anti-Rust Bags + Export Cartons + Heavy-Duty Wooden Pallets.