SSY004929650 Bushing 180×160×105 Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY004929650 Bushing 180×160×105 Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY004929650 is a bushing with a unique part number from Sany, measuring 180×160×105 (outer diameter 180mm, inner diameter 160mm, length 105mm). Specifically designed for the SY1250H 125-ton mining excavator, it integrates a high-strength wear-resistant base material, precision-formed structure, self-lubricating protection, and a corrosion-resistant and wear-resistant surface. It is a key component connecting the shaft system of core assemblies such as the SY1250C2C3KH slewing device and travel gearbox. Primarily used in large open-pit coal mines and metal mines for excavation and topsoil stripping operations, its precise dimensional fit and excellent wear resistance support smooth shaft operation, reduce friction and wear between the shaft and housing, absorb impact vibrations from heavy-duty operations, prevent shaft scratches and housing wear, and prevent transmission jamming, abnormal noises, and other malfunctions. Suitable for mining conditions characterized by high temperature, high dust, strong vibration, and large temperature differences, it is a crucial original equipment manufacturer (OEM) part for reducing maintenance costs and ensuring operational continuity in mines.

Core technical parameters

Model: SSY004929650, a bushing specifically designed for the Sany SY1250H 125-ton mining excavator, with specifications of 180×160×105 (outer diameter 180mm, inner diameter 160mm, length 105mm).
Main material: GCr15 high-carbon chromium bearing steel (corresponding to national standard grade, suitable for heavy-duty wear-resistant requirements in mining), quenched and tempered (oil quenching at 830-850℃ + tempering at 500-600℃) to obtain tempered sorbite structure, hardness reaching HRC58-61, tensile strength ≥1800MPa, excellent fatigue resistance, wear resistance, and impact resistance, sulfur and phosphorus content ≤0.025%, non-metallic inclusion grade ≤2, ultrasonic testing shows no internal cracks.
Operating temperature: -30℃ to 150℃; no brittleness or deformation at low temperatures; maintains good mechanical and lubrication properties at high temperatures.
Core working parameters: The specifications are precisely 180×160×105mm (outer diameter 180mm±0.02mm, inner diameter 160mm±0.01mm, length 105mm±0.02mm), the dimensional accuracy reaches IT7 level, the surface roughness Ra≤0.4μm, and it is suitable for the precision assembly of shaft system and housing; it adopts a self-lubricating structure design, with built-in graphite solid lubricant, the porosity is controlled within a reasonable range, and it can store lubricating oil, eliminating the need for frequent grease filling, solving the problem of shaft burning and seizing caused by untimely lubrication, with excellent self-lubricating performance and a friction coefficient ≤0.15; the bearing pressure can reach 50-80MPa, which can effectively support the heavy load of shaft system, absorb impact vibration, avoid direct contact wear between shaft and housing, and have a service life ≥5000 working hours, which is 2-5 times higher than traditional bushings[1][4][6].
Structural Design: It adopts a cylindrical hollow structure with chamfered ends (3×45°) to avoid scratching the shaft and housing during assembly; the inner wall is precision honed and rolled to form a 0.5-1mm cold-worked hardened layer, which increases the surface hardness by 15%-20%, the residual compressive stress is ≥300MPa, the fatigue resistance is improved by more than 30%, and the friction loss is reduced; the outer wall is smooth and flat; and it has built-in self-lubricating graphite holes.
Shape and size: The overall shape is a hollow cylindrical structure with a regular shape, no burrs or cracks, and the dimensions are precisely 180×160×105mm (outer diameter 180mm, inner diameter 160mm, length 105mm). The chamfer is 3×45°, the inner wall is smooth, the outer wall is flat, and the dimensional tolerance is strictly controlled. The mounting holes are precisely matched with the shaft system and housing holes of the SY1250C2C3KH rotary device and travel gearbox, with a coaxiality of ≤0.03mm.

Core functions and roles

As the “core of shaft protection” for the Sany SY1250H 125-ton mining excavator, its core function is to support the smooth operation of the shaft system, reduce friction and wear between the shaft and the housing, absorb the impact vibration generated by heavy-duty operations, compensate for assembly errors between the shaft and the housing, protect the shaft and housing from damage, and ensure the smoothness and stability of the transmission system. In scenarios such as large open-pit mines and water conservancy projects, it not only avoids transmission jamming and abnormal noise caused by shaft scratches and housing wear, but also reduces the frequency of lubrication maintenance and lowers operating costs through its self-lubricating design.

Applicable Scenarios

Widely used in the SY1250C2C3KH slewing device shaft system, travel gearbox shaft end, and working device hinge joint of the SANY SY1250H 125-ton mining excavator, this wear-resistant component is essential for shaft support and wear protection. It is also compatible with corresponding shaft systems of other large mining excavators of the same specifications from SANY. It is particularly suitable for 24-hour continuous heavy-duty operation in harsh conditions (high dust, strong impact, large temperature difference between day and night, high humidity) in open-pit mines and large-scale earthmoving projects. It is an essential wear-resistant part for equipment manufacturing, overhaul, old machine upgrades, and fault repair. It is also suitable for commercial scenarios such as after-sales maintenance and bulk parts procurement. Its original factory precision compatibility and high reliability can significantly reduce modification costs and downtime, avoid damage to transmission components due to bushing failure, and improve the return on investment of projects. It is an indispensable core component in the field of heavy-duty transmission in construction machinery.

Get a personalized quote now

3. Power System
4. Pipeline
7. Air conditioning system
12 SSY004929649 Bushing 180×160×76
13 SSY004929650 Bushing 180×160×105
14 A820606030364 Sealing Gasket
15 A820101117871 Cover
16 A210491000121 Washer
17 A210111000101 Bolt

*For other spare parts procurement needs, please contact us!