W21 21i nch slewing drive solar tracker s series single worm
slewing drive slewing drive sun tracker suppliers
The slewing drive is a gearbox that can safely hold radial and
axial loads, as well as transmit a torque for rotating. The
rotation can be in a single axis, or in multiple axes together.
Slewing drives are made by manufacturing gearing, bearings, seals,
housing, motor and other auxiliary components and assembling them
into a finished gearbox.
The slewing drive is a modernized take on the worm drive mechanism
that dates back many centuries and was widely used during the
Renaissance Era. Pappus of Alexandria (3rd century AD), a Greek
mathematician is credited for an early version of the endless
screw, which would later evolve into the worm drive. This mechanism
was also used by Leonardo da Vinci as a component in many of his
designs for machines. It can also be found in the notebooks of
Francesco di Giorgio of Siena.
Many slewing drive concepts found prominence with the emergence of
larger scale construction and engineering in the height of the
Greek and Roman Empires.
Slewing drives function with standard worm technology, in which the
worm on the horizontal shaft acts as the driver for the gear. The
rotation of the horizontal screw turns a gear about an axis
perpendicular to the screw axis. This combination reduces the speed
of the driven member and also multiplies its torque; increasing it
proportionally as the speed decreases. The speed ratio of shafts
depends upon the relation of the number of threads on the worm to
the number of teeth in the worm wheel or gear.
As technology has improved, more slewing drives are using hourglass
worm technology, in which the worm is shaped to engage more teeth
in the gear.This increased tooth engagement results in greater
strength, efficiency and durability.
Because of their multiple uses, slewing drives come in a variety of
model sizes, performance ranges and mounting characteristics. The
drives are well suited for applications that require both load
holding and rotational torque from the same gear box. They can also
be made with dual axes of rotation, (turning axes at the same time)
or with dual drives on the same axis, (two worm threads driving the
same ring gear in one axis).
The specifications for drives and gears varies depending on the
material the gear is composed of. However, a majority of the drives
and gears commonly used are composed of steel and phosphor bronze.
According to an extensive series of tests by the Hamilton Gear
& Machine Co., chill-cast nickel-phosphor bronze ranked first
in resistance to wear and deformation.
SE-2 Series slewing drives, slew drives are combined by housing,
slewing ring, two hourglass worm and some matching parts,it
achieved 2 times of tooth contacting. In the same volume and
installation spave, it improved nearly double output torque,
greatly improving the product's performance.
1. Different motors (AC,DC,Hydraulic) can be designed according to
2. Shaft opposite to motor can choose to be hex head or not hex
WEA series slewing drive,slew drive is a new series of slewing
product, also named as slewing reducer. It is commonly composed of
worm,slewing bearing, housing, motor adapter, end cap and other
components. By adopting slewing bearing as its core component,
slewing drive can bear axial force, radial force and tilting moment
simultaneously. Comparing with SE series slewing drive, WEA series
have the advantages
of better protective performance, great transmission torque, better
impact resistance and long working life.
WEA series slewing drive is widely applied in the relatively rotary
parts of machinery and solar energy field. Solar tracking system
of aerial working machinery Truck crane Rock drill, drilling
machine Grasping wood machine, code molding machine.
Open Housing Slewing Drive Dual Worm
Opening house dual worm slewing drive's structure make it run more
smoothly, mainly apply to the application with high output torque but limited mounting space. It can be use for not
high working condition requirement for dust proof, rain-proof and anti-corrosion occasion. Precision grade IP65.
Special Slewing Drive Vertical Type
VE means vertical installation slewing drive, mainly apply to the
high working condition requirement for dust proof, rain-proof and
anti-corrosion occasion. Precision grade IP65.
The Slewing Drive can be used for any occasion where the need for
full-cycle rotation and variable speed requirements. When the need
for larger torque power transmission, the higher accuracy of the
motion transmission or the compact structure of the body requires a
higher mechanism selection, the rotary drive Is the best solution.Enclosed dual axis slewing drive can realize the movement in two
different direction,vertically and horizontally. Usually apply to the dual axis solar tracking systems or some
machinery equipment with similar working condition.
Electric and planetary gearboxes of Special Slewing Drive Dual Axis
can be designed according to customer requirements. Rotary drives have the advantage of saving equipment space, maximum
load capacity, compact design, extensive servicelife and reduced maintenance costs.
1) Tilt Torque: The load is multiplied by the distance between the
load position and the center of the rotary support. If the torque
generated by the load and distance is greater than the rated
tilting moment torque, the rotary drive will be reversed.
2) Axial load: parallel to the slewing bearing
3) Radial load: perpendicular to the slewing bearing
4) self-locking: only when the load, the rotary drive can not
reverse rotation, so called self-locking.
5) Hold torque: Reverse torque. When the drive is rotated
backwards, the parts are not damaged
6) The maximum torque achieved is called the holding torque.
Slew Drive Gear Reducers
• Tilting Moment Torque:
Torque is the load multiplied by the distance between the position
of load and the center of slewing ring. If the torque generated by
load and distance is greater than the rated Tilting Moment Torque,
slewing drive will be overturned
• Holding Torque:
It is the reverse torque. When the drive is rotating reversely, and
parts are not damaged, the maximum torque archived is called
• Axial Load: Load parallel to the axis of slewing ring.
• Radial Load: Load vertical to the axis of slewing ring.
• Self Locking: When loaded, the slewing drive can not reverse
rotation and thus called self-locking Slewing Bearings
Applications for the slewing bearings include:
Slewing Bearings for Excavators
Slewing Bearings for Mobile Cranes
Slewing Bearings for Concrete Pumps
Slewing Bearings for Access Platforms
Slewing Bearings for Truck Cranes
Slewing Bearings for Tower Cranes
Slewing Bearings for Robots
Slewing Bearings for Wind Mills
Slewing Bearings for Off-Shore
Slewing Bearings for Bottling and Filling machines
Slewing Bearings for Packaging Machines
Slewing Bearings for Water and Treatment Plants
Slewing Bearings for Perforation Machines
Slewing Bearings for Plastic Molding Machines
Slewing Bearings for Demolition Devices
Slewing Bearings and Slewing Rings are available with external or
Slewing Drive for solar tracking system
Slewing Drive for PV Application
Slewing Drive for Construction Machinery Application
Aerial working platform
Telescopic boom skylifts
Articulating boom skylifts
Truck mounted crane
woods log grapple
single axis solar tracker
dual axis solar tracker
solar tracking system
Q:Are you trading company or manufacturer?
A: Both of them are attached to UIPI, the manufacturer of slewing
bearings in CHINA and have 11 years experience in bearing industry.
Q: Do you provide OEM service?
A:Yes. About 90% customers are OEM customers. A variety of products
size, quality and quantity can be customized according to your
Q: How long is your delivery time?
A: Production time: 45-60 days generally speaking.
Shipping time: for small order quantity 1-2 pieces and needed
urgently, we suggest transport by air about 7 days; for large order
quantity, we suggest transport by sea about 30 days from Shanghai
Q: How do you guarantee the delivery time?
We have strict production schedule to assure the delivery time,
kindly check the production schedule as below:
A. Forging purchase period: 15-20 days
B. Production process:
1. Rough turning: 2-3 days
2. Raceway heat treatment: 2 days
3. Fine turning: 2 days
4. Gear cutting: 4-5 days
5. Drilling: 2-3 days
6. Final turning: 2 days
7. Assembling and Inspection: 2 days
C. Packing and delivery to Port: 3-5 days
slewing drive sun tracker suppliers
|Model||WORM DRIVE W21|
|Worm Drive Performance Parameters|
|Output Torque||28.7 kN.m|
|Tilting MomentTorque||203 kN.m|
|Holding Torque||105.8 kN.m|
|Static Axial Rating||1598 kN|
|Static Radial Rating||596 kN|
|Dynamic Axial Rating||340 kN|
|Dynamic Radial Rating||270 kN|
|Gear Ratio||90: 1|
|Tracking Precision||≤ 0.1°|
|Input||Ø12 Ø14 Ø16 Ø20 Ø25|