12921534 Sheath Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

12921534 Sheath Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

The 12921534 is specifically designed for the SY1250H mining excavator, a model with heavy operating loads and where pipelines and cables are susceptible to abrasion from sand and gravel, necessitating robust protection. It integrates high-strength, wear-resistant base materials, a flexible and adaptable structure, sealed dustproof protection, and anti-aging and anti-corrosion properties, meeting national and industry standards such as GB/T 9266-2009 and EN ISO 5674:2025. It is compatible with core components such as the SSY009114936 cooling pipeline and hydraulic pipeline. Suitable for open-pit coal mines and metal mines, it prevents pipeline and cable damage due to wear and impact, making it a crucial original equipment manufacturer (OEM) component for ensuring continuous operation in mines.

Core technical parameters

Model: 12921534
Main material: Available in both nylon (PA) and thermoplastic elastomer (TPE) materials.
Operating temperature: -30℃ to 120℃, suitable for the day and night temperature difference and complex environment of open mine, can resist hydraulic oil, dust, acid and alkali corrosion, no aging and cracking, long service life; dimensional stability error ≤ ±0.5%, will not loosen after long-term use, can be used with SSY009114936 cooling pipe to achieve double protection.
Core working parameters: compatible pipe diameter φ25-φ50mm (customizable), conforming to the general specifications of engineering machinery sheaths [8]; wall thickness 1.5-3.0mm, dimensional tolerance ±0.02mm, friction coefficient ≤0.15 [2]; wear rate ≤0.05g/1000 rpm (ASTM G65 standard), tear strength ≥25MPa; adopts spiral or split design, easy to install, service life ≥5000 working hours.
Structural Design: The structure adopts spiral winding or split-type integrated molding and is processed by heat setting to fit the protected parts, increasing the contact area by 50% and dispersing local stress; the built-in buffer layer can absorb impact and prevent parts from being damaged by collision and friction; the two ends adopt a snap-lock sealing design to prevent dust and moisture from entering; the flexible structure can adapt to the bending of the parts without affecting the operation of the equipment, and the key parts are equipped with a reinforcing layer to resist vibration and prevent falling off.
Shape and size: spiral or tubular structure (customized according to the protected part), regular shape, size compatible with SY1250H hydraulic pipeline and cable, length customized according to the original factory assembly standard, inner diameter precisely fits the protected part [5][8], mounting hole position accuracy ±0.05mm, can be directly replaced by the original factory, and matches the size of the sealing gasket and bolt.
Surface treatment: It adopts an anti-aging coating, which can withstand salt spray for ≥600 hours, and is corrosion-resistant and UV-resistant; the surface is smooth and burr-free, does not damage the surface of the protected parts, is easy to clean, and can effectively resist the erosion of high dust and high humidity environments in mines, thus extending its service life.

Core functions and roles

As a “protective barrier” for the SY1250H, its core functions are to isolate wear, resist impact, seal against dust, and protect core components such as hydraulic pipelines and cables from damage and leakage caused by sand and gravel friction and impact. It can extend the service life of the protected components by 30%-50%, reduce operation and maintenance costs, and work together with cooling pipelines, hydraulic pipelines, etc. to form a complete machine protection system, which is a key protective component to ensure stable mining operations.

Applicable Scenarios

It is widely used in the protection of the SY1250H machine and is compatible with the protection of the SSY009114936 cooling pipes, hydraulic pipes, wires and cables and shaft parts [3][8]. It can also be used with large mining excavators of the same specifications. It is suitable for open-pit mines and earthwork projects with 24-hour continuous heavy load and harsh working conditions. It is an essential protective component for equipment manufacturing, overhaul, after-sales maintenance and bulk purchase, which can reduce component wear and downtime costs.

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1. Pump chamber piping
2. Return oil pipeline
3 SSY009114936 Cooling Pipeline
4. Traveling Pipeline
5 Valve body installation
6-turn pipeline
7. Boom piping
8. Boom and Bucket Piping
9 SSY008119457 Hydraulic oil tank assembly
10 12921534 Sheath
11 12921535 Sheath

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