EWA Series Slewing Drive

EWA Series Slewing Drive

Slewing drive is a gearbox that handles radial or axial loads using high rotational torque. In addition, the slewing ring bearing, at the heart of the drive, enables it to withstand high overhung or moment loads. A descendant of the “worm” screw, slewing drives are present in construction machinery, manufacturing, military equipment, and many other applications that require strength and precision.

The physics of the slew drive makes it a versatile solution for many applications. In operation, the slew drive’s axial movement, or motion around its axis, interacts to create radial torque. The action occurs by meshing the grooves of the horizontal screw with the teeth of a perpendicular gear. While turning, the worm gear’s axial movement transfers magnified torque force to the radial gear. The number of threads on the horizontal screw and the number of gears that interact will determine the speed ratio of the setup.

(1) EWA 7 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
3.5 kN.m	14.7 kN.m	20.6 kN.m	227 KN	92.7 KN	47:1	<= 0.15 °	35Kg
2583 Lbf.ft	10800 Lbf.ft	15200 Lbf.ft	51000 Lbf	20800 Lbf

(2) EWA 9 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
8 kN.m	35.6 kN.m	39.8 kN.m	580 KN	220 KN	62:1	<= 0.15 °	52Kg
5904 Lbf.ft	26300 Lbf.ft	29370 Lbf.ft	130300 Lbf	49400 Lbf

(3) EWA 12 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
9.5 kN.m	57 kN.m	44.3 kN.m	760 KN	280 KN	79:1	<= 0.15 °	67Kg
7011 Lbf.ft	41200 Lbf.ft	32700 Lbf.ft	171100 Lbf	62900 Lbf

(4) EWA 14 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
10.8 kN.m	71.2 kN.m	49.5 kN.m	960 KN	360 KN	86:1	<= 0.13 °	75Kg
7070 Lbf.ft	52500 Lbf.ft	36500 Lbf.ft	215800 Lbf	80900 Lbf

(5) EWA 14-2 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
16.2 kN.m	71.2 kN.m	74 kN.m	956 KN	363 KN	86:1	<= 0.17 °	90Kg
11956 Lbf.ft	62600 Lbf.ft	54600 Lbf.ft	216900 Lbf	81600 Lbf

(6) EWA 17 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
12.96 kN.m	142.4 kN.m	74 kN.m	1166 KN	435 KN	104:1	<= 0.1 °	97Kg
9564 Lbf.ft	105000 Lbf.ft	54600 Lbf.ft	262000 Lbf	97800 Lbf

(7) EWA 17-2 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
19.44 kN.m	142.4 kN.m	110 kN.m	1166 KN	435 KN	104:1	<= 0.15 °	115Kg
14347 Lbf.ft	105000 Lbf.ft	81200 Lbf.ft	262000 Lbf	97800 Lbf

(8) EWA 19 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
18.5 kN.m	196 kN.m	82 kN.m	1810 KN	675 KN	94:1	<= 0.1 °	120Kg
13640 Lbf.ft	144500 Lbf.ft	60500 Lbf.ft	406000 Lbf	151700 Lbf

(9) EWA 21 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
28.7 kN.m	203 kN.m	107 kN.m	1600 KN	650 KN	90:1	<= 0.1 °	170Kg
21180 Lbf.ft	150000  Lbf.ft	78900 Lbf.ft	35700 Lbf	146000 Lbf

(10) EWA 21-2 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
48 kN.m	203 kN.m	181 kN.m	1600 KN	650 KN	90:1	<= 0.13 °	200Kg
35400 Lbf.ft	150000  Lbf.ft	141000 Lbf.ft	359700 Lbf	146000 Lbf

(11) EWA 25 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
34.2 kN.m	310 kN.m	160 kN.m	2400 KN	950 KN	104:1	<= 0.1 °	200Kg
25240 Lbf.ft	229000 Lbf.ft	118000 Lbf.ft	539500 Lbf	213600 Lbf

(12) EWA 25-2 Series Slewing Drive

Front View	Top View

Performance Parameters

Output torque	Tilting moment torque	Holding torque	Axial load	Radial load	Ratio	Backlash	Weight
输出转矩	倾覆力矩	保持力矩	轴向承载力	径向承载力	速比	精度	重量
58 kN.m	310 kN.m	275 kN.m	2400 KN	950 KN	108:1	<= 0.13 °	270Kg
42800 Lbf.ft	229000 Lbf.ft	203000 Lbf.ft	539500 Lbf	213600 Lbf

Application Case

Because of the power and dependability generated by slew drive technology, the functions of this engineering technology apply to many types of equipment. One particular use, for example, involves solar technology, tracking the sun’s movements in perfect time to generate maximum energy output.

Robust, smooth, and consistent slew drives have a special place in manufacturing, construction, and many other venues. Based on a centuries-old engineering idea, slew drive-operated equipment can be simple or complex, depending upon the requirements. Any job requiring high load capacity and reliable positioning may require the implementation of slewing drive engineering.

The list of active applications for slew drives is extensive. Several industries require some form of slew drive to make their operations more efficient. Equipment for mining, construction, metalworking, and other applications that require unrelenting strength combined with faultless precision use slewing technology for safety and accuracy. Powerful devices like aerial lifts, rotating forklifts, truck-mounted cranes, cable winders, fire trucks, hydraulic machinery, and utility equipment depend on the safety and strength of slew drives.