Swing Gearbox （Reduction Assy）
Swing gearboxes, or slewing gearboxes, are specialized transmission systems engineered for heavy machinery and equipment that require precise and powerful rotational movement. These durable components are commonly used in excavators, cranes, and other large-scale construction and industrial machinery, enabling the upper structure of the machine to rotate 360 degrees around a stationary base.
Functions of a Swing Gearbox
A swing gearbox, also known as a swing drive device, is used in heavy machinery to transmit and regulate power for rotational or swinging actions of critical equipment parts. This type of gearbox is commonly found in large mobile or stationary machinery such as excavators, cranes, and loaders.
The primary functions of a swing gearbox include:
Torque Amplification: By utilizing multiple gears, the swing gearbox enhances the input torque to provide sufficient output torque for driving the rotating components, such as enabling the upper body of an excavator to rotate relative to the lower body.
Speed Regulation: The gearbox adjusts the gear ratio to modify the relationship between input power and output speed, meeting the specific speed and force requirements of the machinery.
Direction Conversion: It converts linear or continuous rotational motion into swinging motion within a designated angle range, facilitating precise movement and positioning of machinery components.
Product List
Swing Gearbox for Excavator
In heavy-duty construction machinery such as excavators, the Swing Gearbox is located between the upper structure of the excavator and the lower walking chassis. Specifically, it is integrated into the excavator’s slewing support system and is responsible for connecting and driving the upper turntable (including the cab, boom, forearm, and bucket) to rotate 360 degrees relative to the lower track chassis.
The swing gearbox operates as follows:
Power from the engine, either hydraulic or electrical, is transmitted to the input of the swing gearbox. Inside, planetary gear systems or multi-stage gear reduction mechanisms convert high-speed, low-torque input into low-speed, high-torque output. This amplified torque is then delivered to the slewing support, enabling smooth rotation of the upper turntable around the central axis. Equipped with control systems like limit switches, lubrication, and overload protection, the swing gearbox ensures stable and reliable operation, protecting against damage from overloading or other anomalies.
Applicable Excavator Brand
Kobelco
● SK60C ● SK200-8 ● SK60-6
● SK60-5 ● SK200-5
● SK60-8 ● SK210-8
● SK75 ● SK230-6E
● SK130-8 ● SK250-6E
● SK135 ● SK250-8
● SK140-8 ● SK260-8
● SK200-8 ● SK250-8
● SK330-8 ● SK350-8
● SK460
Sumitomo
● SH60 ● SH265
● SH70 ● SH300A3
● SH120 A1 ● SH330-3
● SH120 A2 ● SH350A5
● SH120 A3 ● SH350-3B
● SH120 A5 ● SH350-5
● SH200 ● SH460
● SH210-5 ● SH480-6
● SH240
LiuGong
● LG200 ● LG225
● LG240 ● LG906
● LG907 ● LG908
● LG915 ● LG922D
● LG924 ● LG925
● LG933E ● LG936
Yuchai
● YC35-6
● YC35-7
● YC60-7
● YC60-8
● YC85
● YC85-5
● YC85-6
● YC360
CASE
● CX55
● CX360
● CX460
● CX800
● CX130
LOVOL
FR150
Sunward
● SWE50
● SWE60
● SWE70
● SWE330
● SWE365
XCMG
● XE80 ● XE135D
● XE150 ● XE210
● XE215 ● XE265
● XE330 ● XE335
● XE370 ● XE470
● XE490D ● XE700
● XE900
Daewoo
- DH55
- DH60-7
- DH80-7
- DH150
- DH220-5
- DH220-7
- DH225-7
- DH258
- DH300-5
- DH300-7
- DH370-7
- DH370-9
- DH420
- DH500
Doosan
- DX55
- DX60
- DX75
- DX80
- DX120
- DX140LC
- DX150
- DX150-9
- DX225
- DX255
- DX260
- DX300-7
- DX340
- DX380
- DX420
- DX520
Caterpillar
● E80 ● E315DL ● E329D
● E85 ● E316E ● E330D
● E200B ● E318D ● E330D2
● E305.5 ● E320 ● E336D
● E306E ● E320C ● E345D
● E307E ● E320D ● E345D2
● E312 ● E320D2 ● E349D
● E312D ● E323D2 ● E349D2
● E313D ● E324D ● E374F
● E313GC ● E325C ●E307B
Hitachi
● EX60-5 ● ZX200
● EX75 ● ZX200LC
● EX120-5 ● ZX200-5
● EX135 ● ZX200-6
● EX200-3 ● ZX200-6
● ZX55
● ZX70 ● ZX240-3
● ZX110M ● ZX240-5
● ZX120 ● ZX250-3
● ZX120-3 ● ZX330-3
● ZX130-5 ● ZX450
● ZX200-3 ● ZX870
Kato
- HD1023
- HD1250
- HD1430
Komatsu
Hyundai
● R60-7 ● R250-7 ● R360-7
● R80-7 ● R265 ● R450
● R110-7 ● R275-7 ● R455
● R130-7 ● R305-7 ● R485
● R150-7 ● R305-9
● R150-9 ● R320-7 ● R210 ● R335-7
● R220-5 ● R335-9 ● R225-7 ● R375-7
● R245-7 ● R385-9 ● R500-7
SANY
● SY115 ● SY135
● SY135-8 ● SY215-8
● SY245 ● SY305
● SY330 ● SY335-9
● SY365 ● SY465
● SY485
Volvo
● VOL55 ● VOL60
● VOL140 ● VOL210
● VOL240 ● VOL290
● VOL300 ● VOL350
● VOL360 ● VOL380
● VOL460 ● VOL480
● VOL700 ● VOL950
● EC360 ● EC460
● EC700
English 
Spanish 
Portuguese