lvifloae 37mm Chain Saw Crankshaft Crank Piston 3 Piece Set 1130 030 2000 Precision Machined High Carbon Steel Chain Saw Engine Overhaul Parts Wear High Temperature Repair Kit

Produktbeschreibung

【Precision dimensions and adaptability】Bore accuracy: 37mm, adaptable to 017/MS170 and other classic Crankshaft specifications: stroke 32mm, connecting rod center distance 42±0.1mm, output shaft diameter 8mm, piston assembly: compression height 18mm, piston pin diameter 10mm 【Material Process Analysis】Crankshaft: SCM440 chrome-molybdenum steel forging, high-frequency quenching, Piston: SAE 4032 aluminum alloy low-pressure casting, graphite coating on skirt, Cylinder: double-layer chrome-plating process, cross-mesh honing 【Performance Enhancement Design】Intake Optimization: Piston Windowed Design, Crankcase Volume Matching Calculation, Cooling System: Cylinder Heat Sink Area Increased by 20%, Enhanced Cooling of Internal Piston Oil Paths 【Installation specifications】Assembly clearance: piston ring end gap: 0.2-0.3mm (first ring)/0.15-0.25mm (second ring), connecting rod side gap: 0.05-0.1mm 【Durability test data】Bench test results: 200 hours of continuous full-load testing with no anomalies, maximum endurance speed: 12,500rpm (short) Actual use indicators: conventional operating life: 900-1500 hours