Heavy Duty Excavator Track Shoe Bolts M24x120 Compatible With CAT 320 Komatsu PC200 Grade 10.9 Alloy Steel Anti-Corrosion Coating
Track shoe bolts endure 5X higher shear loads than standard chassis bolts due to direct ground impact. Our M24x120mm bolts utilize quenched & tempered 42CrMoV4 steel (DIN EN 10269) achieving 1220MPa tensile strength.
Proprietary cold-forging creates continuous grain flow in shank transitions, increasing fatigue resistance by 40% versus hot-forged alternatives. Finite element analysis confirms uniform stress distribution under 380kN cyclic loading - critical for 50+ ton excavators operating in rock excavation.
Bolt head geometry incorporates 12-point flange design to prevent rotation during track flexing.
Standard zinc plating fails within 200 hours in abrasive soils. Our Geomet® 3210 coating combines zinc-aluminum flakes with ceramic nanoparticles in a chromate-free matrix.
Independent testing (ASTM D968) demonstrates 2,500+ hours salt spray resistance and 30% higher abrasion resistance than Dacromet. The 15-20μm coating withstands rock gouging during track articulation while maintaining 0.35μ surface roughness for consistent friction coefficients.
Color-coded violet finish enables visual wear inspection without gauges.
CNC machining maintains ±0.015mm dimensional tolerance per DIN 6921. Thread rolling after heat treatment induces compressive surface stresses, raising fatigue strength 25%.
100% automated optical inspection verifies:
- a 6g thread fit per ISO 965-1
- b Rockwell C33-39 hardness gradient
- c 0.02mm max head-to-shank concentricity
Laser-etched QR codes provide full traceability - including furnace batch, heat treatment curve, and QC technician ID.
OEM Excavator Track Bolt Kit for Sany SY215/Hitachi ZX200, Grade 10.9 Locking
Acidic mining slurry accelerates stress corrosion cracking. Our bolts pass NACE TM0177 Method A testing in H₂S-saturated environments (pH 2.5) at 90% yield load.
Hydrogen embrittlement risk is mitigated via baking at 200°C for 8 hours post-plating. Comparative testing in copper-ore slurry shows 8,000-hour service life vs. 1,200 hours for galvanized bolts.
Optional HVOF tungsten carbide coating available for seawater dredging applications.
Head markings indicate torque zones:
- • Yellow (150-180Nm)
- • Blue (180-220Nm)
- • Red (220-250Nm)
Thermochromic washer turns black at 110% over-torque to prevent yield failure.
Mobile app integration enables:
- a QR code scanning for installation parameters
- b Bluetooth torque wrench calibration
- c Digital torque-angle recording for ISO 9001 compliance
Reduces track assembly errors by 73% in field trials.
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