SA800-SB800-SY800

SA800 / SB800 / SY800 — large 8-piston TAVRUS caliper for the front axle of large D-class SUVs. OVERVIEW SA800, SB800 and SY800 are 8-piston calipers developed in-house for large SUVs. The body is forged from aluminium alloy: forging delivers high rigidity, tensile strength, toughness and material density. Compared with cast aluminium calipers, body rigidity is about 50% higher, which reduces the risk of caliper failure in service. The built-in double oil seal (instead of ordinary external dust boots) makes the brake feel and reaction more precise. After anodizing and vacuum coating (CVD) the colour is locked in: the coating does not crack or peel and gives the caliper a metallic sheen and vivid colour. Installation improves the look of the wheel and lets the car handle varied road conditions with confidence — from daily driving to the track. HIGHLIGHTS • In-house 8-piston caliper for large SUVs. • More pistons — a linear, predictable pedal. • After multi-stage testing, performance is about 35% above the stock caliper. • With high-performance pads it confidently handles intense driving — from mountain roads to the track. CALIPER SPECIFICATIONS • Weight: 4601 g/pc • Piston area: SA800 — 63.46 cm²; SB800 — 55.98 cm²; SY800 — 63.46 cm² • Piston diameter: SA800 — 32 mm × 8; SB800 — 28 mm × 4 + 32 mm × 4 • Brake disc diameter: Ø400 mm / Ø380 mm / Ø355 mm • Brake disc thickness: max 34 mm / min 32 mm • Caliper dimensions: D155.7 × H93.81 × W337.786 mm • Oil inlet thread: M10×1 • Mounting hole centre distance: 220 mm • Mounting hole offset: 42 mm • Mounting hole diameter: 12.25 mm • Distance from mounting plane to the top of the disc: 56.45 mm BRAKE DISC • Friction surface width: Ø355 mm × 32–54.5 mm; Ø380 mm × 34–54.5 mm; Ø400 mm × 34–54.5 mm • Ventilation: Ø355 × 32 — 72 curved ducts, 7 slots, PCD 233 mm; Ø380 × 34 — 84 ducts, 8 slots, PCD 258 mm; Ø400 × 34 — 84 ducts, 8 slots, PCD 278 mm • Heat treatment: 580 °C heating / 120 °C cooling, cycled for 72 h • Mounting hole diameter: Ø8.1 mm • Centring ring: Ø355 × 32 — Ø209 mm (petal step 2.5 mm); Ø380 × 34 — Ø238 mm (petal step 1.5 mm); Ø400 × 34 — Ø258 mm (petal step 1.5 mm) • Surface treatment: iron phosphating, ground friction surface • Disc standard: GG20HC BRAKE PADS • Model: S1200 • Thickness: 18 mm • Friction surface width: 49.5 mm • Friction block area: 35.3 cm² × 4 pads per caliper • Compound: F500 (standard) / F600 (street, optional) / S750 (street & track, optional) / R900 (track, optional) / S800 (for carbon-ceramic discs, optional) QUALITY CONTROL • Forged body tensile strength: Qb ≥ 320 MPa • Body hardness: HV ≥ 400 • Low-pressure seal test: 0.4 MPa air, hold 5 s, pressure drop ≤ 100 Pa • High-pressure seal test: 12 MPa air, hold 5 s, pressure drop ≤ 0.2 MPa • Appearance: anodized surface free of damage, uniform colour and gloss • Ultra-high pressure test: sampled calipers withstand 30 MPa oil pressure without failure • Other characteristics per QC/T592.