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.

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.