R460A

R460A — front 4-piston forged-aluminium caliper from TAVRUS for A- and B-class cars. OVERVIEW R460A is a large 4-piston front caliper developed for compact and mid-size A- and B-class vehicles. 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; this 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. Four large pistons match the car's characteristics better and improve braking performance. Fitting improves the look of the wheel and lets the car handle everything from daily driving to the track. HIGHLIGHTS • One-piece forged 4-piston caliper of in-house design for the front axle. • Lightweight design combined with an improved linear pedal feel. • After rigorous multi-stage testing, performance is about 40% above the factory caliper. • With high-performance pads it confidently handles intense driving — from mountain roads to the race track. CALIPER SPECIFICATIONS • Weight: 1840 g/pc • Piston area: 45.31 cm² • Piston diameter: 41.86 mm × 2 / 33.86 mm × 2 • Brake disc diameter: Ø332 mm – Ø380 mm • Brake disc thickness: max 32 mm / min 30 mm • Caliper dimensions: D141.2 × H69.14 × W274 mm • Oil inlet thread: M10×1 • Mounting hole centre distance: 180 mm • Mounting hole offset: 42 mm • Mounting hole diameter: 12 mm • Distance from mounting plane to the top of the disc: 57.75 mm BRAKE DISC • Friction surface width: Ø355 mm × 32–59 mm; Ø332 mm × 32–52 mm; Ø300 mm × 30–52 mm • Ventilation: Ø355 × 32 — 72 curved ducts, 7 slots, PCD 233 mm; Ø332 × 32 — 72 curved ducts, 6 slots, PCD 210 mm; Ø300 × 30 — 64 curved ducts, 6 slots, PCD 183 mm • Heat treatment: 580 °C heating / 120 °C cooling, cycled for 72 h • Mounting hole diameter: Ø9.1 mm • Centring ring: Ø209 mm (for 355×32 disc), Ø190 mm (332×32), Ø158 mm (300×30), petal step 2.5 mm • Surface treatment: iron phosphating, ground friction surface • Disc standard: GG20HC BRAKE PADS • Model: R460A • Thickness: 18 mm • Friction surface width: 46.5 mm • Friction block area: 50.35 cm² × 2 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.