Quanzhou Yangxin Machinery Co., Ltd.
Quanzhou Yangxin Machinery Co., Ltd.
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M24 x 80mm Track Chain Assembly Bolts & Nuts Kit - Grade 10.9 High Tensile Steel - Corrosion Resistant Coating - Compatible with Common Crawler Tractor Undercarriage Systems
Innovations:
Locking Tech: Integral spiral locking threads (Deutschhold® patent)
Material: Grade 12.9 super alloy (1,200 MPa yield)
Finish: Phosphating + wax impregnation
Design: Reduced-shank diameter for elasticity
Dynamic Load Performance:
Tested under SAE J2531 vibration profile (10–2,000Hz), these bolts maintain clamp load at >85% after 5M cycles. The spiral lock threads create radial interference, resisting loosening better than nylon inserts. Phosphated surface holds lubricant film, reducing fretting wear by 60%.
Compatibility:
Mine sites with blast vibrations
Piling rigs/compactors
Rail-mounted excavators
Technical Specs:
Fatigue limit: 425 MPa (R = -1)
Operating temp: -50°C to +150°C
Magnetism: <1.05 permeability (non-interfering with sensors)
Maintenance:
Inspect every 500 service hours. Discard if thread damage exceeds 10% or corrosion penetrates >5µm.
| Thread Size | Length (mm) | Thread Pitch (mm) | Head Type | Common Applications |
| M16 | 50 | 2 | Hex | Small Dozers, Mini Excavators |
| M20 | 60 | 2.5 | Hex | Mid-Size Excavators, Loaders |
| M22 | 70 | 2.5 | Hex | Crawler Cranes, Heavy Loaders |
| M24 | 80 | 3 | Hex | Bulldozers (D6-D7 Class) |
| M27 | 90 | 3 | Hex | Large Bulldozers (D8-D9) |
| M30 | 100 | 3.5 | Hex | Mining Dozers (D10+), Drills |
| M36 | 120 | 4 | Hex | Ultra-Class Mining Equipment |
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