Name: EC55 EC60 Gear Reduction Unit High Torque Excavator Swing Gearbox
Brand: Lanzhou Fudong Guangqi Trading Co., Ltd
SKU: EC55
Availability: InStock

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EC55 EC60 Gear Reduction Unit High Torque Excavator Swing Gearbox

EC55 Gear Reduction Unit

EC60 Gear Reduction Unit

High Torque Excavator Swing Gearbox

Place of Origin:

China

Model Number:

EC55

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Product Details

Productname:

Swing Motor Gearbox

Warranty:

3 Months

Type:

Gearbox

Application:

Swing Motor In Excavator

Highlight:

EC55 Gear Reduction Unit

EC60 Gear Reduction Unit

High Torque Excavator Swing Gearbox

Payment & Shipping Terms

Minimum Order Quantity

1 Pc

Packaging Details

Carton

Delivery Time

7-35days

Payment Terms

T/T

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Product Description

Excavator Final Drive EC55 EC60 Excavator Swing Gearbox Reduction Machinery Parts

The swing reducer of an excavator, more commonly known as the swing gearbox, is a core transmission assembly that connects the slewing motor to the large slewing gear ring. Its fundamental function is speed reduction and torque multiplication, facilitating steady 360° full‑rotation movement of the upper superstructure.

Basic Structural Makeup

Sun Gear: Connected to the spline teeth of the slewing motor, it inputs high‑speed rotational power.Planet Gears: 3‑4 individual gears per stage, revolving around the sun gear while self‑rotating to transfer torque.Ring Gear: Fixed rigidly to the housing and meshes with the planet gear group.Planet Carrier: Transmits output power to drive the lower small drive pinion gear.Brake: Built‑in wet multi‑disc brake assembly, spring‑engaged and hydraulically disengaged, preventing reverse rotation of the mechanism.Housing & Bearings: High‑strength cast or forged steel housing, supported by heavy‑load‑capacity bearings, dust‑proof and leak‑proof in performance.

Low‑torque high‑speed power originating from the hydraulic motor is transmitted through the sun gear, primary planetary gear set and secondary planetary gear set to the output planet carrier. The pinion gear operates at low speed with high torque, meshing with the inner gear ring of the slewing bearing to drive upper‑structure slewing motion.

Common Defect Phenomena & Root Cause Analysis
- Abnormal noise / Jerking operational performance: Gear wear and surface pitting defects, bearing functional breakdown, insufficient or contaminated lubricating fluid, inappropriate gear meshing backlash value.
- Oil seepage and leakage occurrences: Worn oil sealing components, housing crack defects, overfilled lubricant liquid level, clogged breather ventilation hole.
- Slow‑moving or power‑short slewing performance: Worn gear and bearing assemblies, incomplete brake release function, hydraulic motor internal bypass leakage flow, mismatched speed‑reduction transmission ratio.
- Excessive thermal overheating conditions: Deficient oil level or deteriorated lubricant characteristics, overload operating conditions, persistent brake drag friction resistance, inadequate heat dissipation capability.
- Gear skipping / Tooth fracture incidents: Sudden impact load forces, foreign debris entry into internal components, fatigue‑induced degradation wear, shaft misalignment deviations during assembly processes.

Machinery Test Report	Provided	Warranty	3 months
Video outgoing-inspection	Provided	Brand Name	OEM
Place of Origin	China	Product name	Excavator Final Drive
Product Description	Swing Reduction Gearbox	Quality	OEM Standard
Condition	Brand New	Model Number	EC55 EC60
MOQ	1 Piece	Delivery Time	5-7 Days
Application	Excavator	Packing	Standar Packing