Shanghai GM Chevrolet Rear Brake Disc

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Engineered as a dual-brand synchronized rear brake disc exclusively for General Motors' global platform, the Rear Brake Disc of Chevrolet (SAIC-GM) 26676795 represents a new benchmark in cross-model compatibility and performance consistency. Unlike generic universal discs that force compromises on either brand, this product undergoes separate calibration for BUICK's premium comfort-oriented braking system and CHEVROLET's sporty responsive braking logic, delivering factory-matching performance across all compatible models. It's a one-stop solution for global distributors and repair workshops-no cross-brand compatibility issues, no modification required, and installation takes less than 45 minutes per axle even for entry-level technicians.

The brake disc substrate adopts GG25 high-carbon grey cast iron. Full-spectrum metallographic inspection is implemented for incoming raw materials, and the entire production process complies with the IATF16949 control specifications for automotive components. After precision milling of the friction working surface, the surface roughness Ra is controlled within 1.9~2.3μm. The integrated casting design of ventilation slots optimizes convective heat dissipation. The product meets the calibrated parameters specified in General Motors' original brake system drawings and is applicable to the low-speed and high-frequency braking conditions of family passenger cars.

There are different corresponding codes for the Rear Brake Disc of Chevrolet (SAIC-GM) 26676795

Precision Performance Regulation of Laser Engraving
To pursue ultimate performance and quietness, laser technology has been applied to the surface treatment of brake discs. Laser surface treatment is mainly divided into scoring, quenching, coating and other methods.

Laser Surface Scoring: High-energy laser beams are used to precisely carve specific patterns (such as M-shaped grooves) on the friction surface. These micro-grooves can optimize the heat flow distribution during braking and facilitate debris discharge, thereby improving friction stability and suppressing the generation of noise (NVH) at specific frequencies from the source.

Laser Surface Quenching: The disc surface is locally heated at high speed and then rapidly cooled to achieve surface transformation hardening. This process not only increases local hardness, but crucially converts harmful residual tensile stress on the surface into beneficial residual compressive stress.

The optimization of this stress state can significantly improve the fatigue resistance life and deformation resistance of brake discs, enabling them to maintain higher stability and reliability under long-term alternating thermal loads.

Green Machining Revolution: Balancing Precision and Environmental Protection
Traditional brake disc machining relies heavily on cutting fluid for cooling and lubrication, which not only causes environmental pollution but also leaves residual oil on the disc surface that is difficult to clean. We have taken the lead in adopting a dry cutting + minimal quantity lubrication (MQL) composite process in the industry, completely changing this backward production mode.

This process uses compressed air mixed with micron-level lubricant droplets (only 5-10ml per hour) to replace traditional cutting fluid, achieving almost oil-free machining. To solve the heat dissipation problem of dry cutting, we have installed a high-efficiency cutting heat recovery system on each machine tool, which converts the heat generated during cutting into hot water for workshop heating and domestic use, increasing energy utilization rate by 35%. At the same time, we have built a fully enclosed metal chip recycling system that automatically collects, crushes and briquettes the iron chips generated during machining, and directly sends them back to the smelting plant for reuse, achieving a 100% recycling rate of metal waste.

This green machining process not only eliminates environmental pollution but also improves product quality-without cutting fluid residue, the subsequent surface treatment adhesion is increased by 22%, and the risk of corrosion caused by residual oil is completely eliminated.

Q1: Can the factory original rear brake caliper for Chevrolet Cavalier be directly fitted without modification to OE26676795 brake rotors? Are aftermarket multi-piston calipers directly compatible?
A: Factory single-piston floating calipers can be installed in original positions with zero modification. Wheel hub bolts must be torqued to 110Nm per OEM specifications during installation. Direct retrofit of oversized racing calipers is not recommended. Model 26676795 is cast per factory chassis dimensions; mismatched friction contact surfaces of modified calipers commonly lead to unilateral uneven wear and drastically amplified brake squeal. Custom aftermarket-specific rotors are required for brake performance upgrades. Replace OE13597593 brake pads alongside DOT4 brake fluid synchronously; avoid full-throttle emergency hard braking within the 500km break-in period.

Q2: Will the anti-corrosion painted flange area of 26676795 develop rust and peeling when used year-round in coastal high salt-fog regions?
A: The graphene epoxy coating passes rigorous 728-hour salt fog testing and stays intact without peeling for 3 years under regular operation in rainy, high-salinity coastal environments. Only the friction working surface has no anti-corrosion coating; thin surface rust forming after overnight parking in rain is a normal physical occurrence, removable via 3~5 gentle low-speed brake applications without damaging the base substrate of the brake rotor.

Q3: What minimum wear thickness mandates full replacement of the Rear Brake Disc of Chevrolet (SAIC-GM) 26676795? How frequently should household vehicle brake rotors receive routine inspection?
A: The legally stipulated OEM discard minimum thickness is 19.3mm; full rotor replacement is mandatory once measured thickness falls below this value. For regular urban commuting, scheduled shop inspection is required every 20,000km, shortened to 15,000km for vehicles operated frequently on short trips under humid southern climates. Core inspection benchmarks: lateral runout of rotor surface ≤0.045mm; premature replacement is advised if groove depth exceeds 0.5mm.

Intelligent Braking Goes Mainstream: Embedded Multi-Parameter Sensors Become Standard
On May 8, 2026, a leading global braking technology supplier began mass production of brake discs with fully integrated multi-sensor modules-marking the end of external add-on wear sensors . These discs feature embedded capacitive sensors that measure not just thickness, but also real-time temperature, disc thickness variation (DTV) and lateral runout, with data transmitted wirelessly to the vehicle's ECU via Bluetooth Low Energy.

The system can predict brake failure up to 5,000 kilometers in advance and automatically adjust braking force distribution to compensate for uneven wear-reducing accident risk by 37% according to independent testing. For distributors, this creates a new high-margin product category and opens doors to recurring revenue from data-driven maintenance services. We're currently developing our own sensor-integrated disc platform, with prototype testing scheduled for June 2026.

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