SSY008347233 Slewing Platform Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY008347233 Slewing Platform Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

The SSY008347233 slewing platform is a heavy-duty box-type double-bearing slewing platform customized by Sany. It integrates a large, integrally welded box-type frame, slewing bearing mounting flange, upper equipment base, integrated hydraulic/electrical wiring harness channels, and anti-torsional reinforcement ribs. It is the core structural component connecting the slewing device (SY1250C2C3KH) to the working device/engine/cab. It is mainly used for heavy-duty slewing operations in mining stripping, large open-pit mining, water conservancy projects, and port infrastructure. Through high-strength structural design and precision machining, it achieves low-stress, high-rigidity, and impact-resistant performance, avoiding slewing jamming, sealing failure, or structural breakage caused by platform deformation. It is suitable for extreme working conditions such as high temperature, high dust, and large temperature differences, making it a key original equipment manufacturer (OEM) component for ensuring production capacity and reducing downtime losses in mines.

Core technical parameters

Model: SSY008347233
Main material: The main frame is made of Q690 high-strength plate + NM400 wear-resistant plate composite welding; the key flanges and support surfaces are made of 42CrMo forgings as a whole; the welds are subjected to UT+MT double non-destructive testing to eliminate welding defects; the whole stress relief annealing treatment is carried out, the residual stress is ≤80MPa, and the deformation resistance is strong.
Operating temperature: -30℃ to 55℃. It does not become brittle at low temperatures and maintains stable structural rigidity at high temperatures, making it suitable for the working environment of open-pit mines with large temperature differences between day and night.
Key operating parameters: Platform rated load ≥1250kN; box-type double-support beam structure, with a 30% increase in bending section modulus compared to traditional single beams; slewing bearing mounting flange diameter perfectly matches the SY1250C2C3KH slewing bearing (approximately 1200mm), flange flatness ≤0.05mm/1000mm, bolt hole position accuracy ±0.1mm; total platform weight approximately 18.5 tons; perpendicularity of the mounting reference surface to the slewing axis ≤0.03mm/m; capable of withstanding impact loads from a maximum digging force of 605kN.
Structural Design: The design employs a box-type double-support beam with grid-like reinforcing ribs, significantly improving torsional and bending stiffness and preventing platform warping during heavy excavation. The slewing bearing mounting surface is a machined flange without seams, ensuring installation accuracy. Standard mounting interfaces for the engine, hydraulic oil tank, cab, and valve group are provided for easy assembly. Integrated hydraulic pipeline channels and wiring harness trays prevent pipeline wear and facilitate maintenance. Multiple sets of lifting lugs are provided for convenient on-site lifting and replacement. The edges are rounded to reduce stress concentration.
Shape and Dimensions: The overall structure is a rectangular box, approximately 4800mm long, 3500mm wide, and 1200mm high. The slewing bearing mounting flange specifications are completely identical to those of the SY1250C2C3KH slewing device (upper flange φ1050×M24×16 holes); the flatness of the upper equipment mounting surface is ≤0.08mm/1000mm; the coaxiality of the lower connecting surface with the slewing device flange is ≤0.1mm.
Surface treatment: The main frame surface is protected with three layers of coating: shot blasting, epoxy zinc-rich primer, and wear-resistant topcoat. The coating thickness is ≥120μm, the adhesion reaches GB/T 9286 Grade 1, and the salt spray resistance is ≥1000 hours. The flange machined surfaces are protected with precision grinding and anti-rust oil. The weld seams are additionally reinforced with a coating.

Core functions and roles

As the “rigid backbone” of a 100-ton mining excavator, its core function is to bear and transmit the vertical load, digging impact load, and overturning moment of the entire machine. It also provides a precise installation reference for the slewing device, supports the entire weight of the engine, hydraulic system, cab, and working device, and provides a safe and reliable path for hydraulic lines and electrical wiring harnesses. In large open-pit mines and water conservancy projects, its box-type double-support structure evenly distributes stress, preventing localized platform deformation; the overall welding and forged flange design improves fatigue life; integrated pipeline channels reduce the risk of pipeline wear and collisions during operation; and precise installation references ensure coordinated operation of the slewing device and working device, achieving smooth start-up and micro-motion control. It is one of the decisive components for the overall structural strength and operational stability of the machine.

Applicable Scenarios

Widely used in ore mining and topsoil stripping operations in large open-pit coal mines and metal mines, it is also suitable for large-scale water conservancy projects, port and wharf construction, and large-scale urban demolition and backfilling projects. It is particularly suitable for 24-hour continuous heavy-duty operations and harsh working conditions (high dust, strong impact, large temperature differences between day and night), making it a core original equipment manufacturer (OEM) structural component for large-scale mining and the timely progress of large-scale projects. It is also compatible with commercial scenarios such as equipment overhauls, old machine upgrades, and parts replacement. Its precise OEM compatibility and high reliability can significantly reduce modification costs and downtime, improving the return on investment for projects.

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1 SSY008347233 Slewing Platform
2. Platform Supervisor Lu
5 SSY004911131 1250 Cab Assembly
6. Rotary Mechanism
8 SSY007450352 Counterweight Assembly
9 10275621 Adjusting shims
10 10450540 Washer
11 SSY004981300 Counterweight Bolt
18 Body panel assembly

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