Product Details

The main structure of the slew drive includes outer and inner rings, gear systems, motors, reducers, bearing systems, seals and protection components. The outer ring is usually fixed in the mechanical system, while the inner ring is connected to the mechanical equipment and rotates through the drive system. The gear system is the key transmission mechanism, which is composed of precision-made gears to achieve smooth rotation of the inner and outer rings. The motor provides rotational torque, the reducer is used to reduce the rotational speed, the bearing system is used to support and guide the rotational motion, and sealing and protective measures ensure the stable operation of the internal mechanical components.

Specification

Slew drives are widely used in the field of engineering machinery, and their main function is to realize the rotational motion of mechanical equipment. The following are some common applications of slew drives in construction machinery:

Excavators and excavation equipment: Slew drives are used to implement the rotating chassis of excavators and other excavation equipment, allowing them to rotate 360 degrees. This is important for accurate positioning and orientation during earthmoving, excavation and construction operations.

Tower Crane: Tower cranes on construction sites often need to implement slewing movements to ensure that the boom can be accurately positioned and cover the entire work area. The slew drive is used to realize the rotation function of the tower crane.

Model	Output Torque	Tilting Moment Torque	Holding Torque	Gear Ratio	Tracking Precision	Weight	Drawing
SE25	18 KN.m	271 KN.m	158.3 KN.m	150:1	0.15°	204kg
SE25	13300 lbf.ft	200×10³ lbf.ft	117×10³ lbf.ft	150:1	0.15°	204kg

Frequently Asked Questions

Expert Insights and Reliable Solutions to Your Most Common Questions.

1. What types of slewing bearings does ZZ Slewing Bearing provide?

ZZ Slewing Bearing supplies a full range of slewing bearings to meet different industrial needs:

Single row four point contact slewing bearings Application: medium loads, precise rotation.
Double row ball bearings Application: higher radial and axial loads.
Cross roller bearings –Application: high rigidity, suitable for robots and machining centers.
Three row roller bearings – Application: extreme loads in heavy equipment.
Ball combine roller bearings –Application: precise rotational adjustment applications.
Customized bearings – tailored for specific equipment requirements.

2. How do I choose the right bearing for my application?

Typical selection parameter for ZZ clients:

Load type: axial, radial, and tilting moment.

Rotation RPM: ensures long service life.

Installation space & mounting dimensions: inner/outer ring diameter, bolt circle.

Precision & rigidity requirements: critical for cranes, excavators, and robots.

ZZ engineers provide professional selection guidance according to your equipment and drawings.

3. What materials does ZZ Slewing Bearing use for slewing bearings?

ZZ Slewing Bearing selects materials for strength, wear resistance, and long-term durability:

Slewing ring: 42CrMo, 50Mn, C45N, 40CrNiMo, C48E.

Special forging spare parts: carburized/hardened steels for gear teeth (20CrMnTi, 18CrNiMo7‑6).

Corrosion resistant: SS 304, 316L, duplex stainless steel.

Surface treatments: heat treatment, quenching, carburizing, induction hardening, and surface coating(Four-Layer Packing, Strong Anti-Rust Oil, Black Oxide Treatment, Jet Black Paint Finish, Hot-Dip Galvanizing (CGL), Electro-Galvanizing (EGL), Hot-Dip Galvanizing + Paint Finish)

4. How can ZZ Slewing Bearing achieve maximum service life?

Correct installation with flat surfaces.

Proper lubrication using grease.

Avoid overloading or shock loads over capacity.

Monitor operating conditions regularly to prevent debris entry.

5. What causes abnormal noise or vibration in bearings?

Typical factors observed by ZZ engineers:

Insufficient or incorrect lubrication.
(dust, metal particles) in raceways.
Rolling element or track damage.
Uneven mounting surfaces or misalignment.
Incorrect bolt torque(below grade 8.8) or preloading.

6. What are lead times and lifetime guarantee?

In-stock: 3–7 days.

Custom: 2–6 weeks depending on size, load, and precision.

Warranty: 1 year

Lifetime Free Spare Parts: Glue, seals, steel ball

7. Does ZZ provide installation and technical support?

Yes — ZZ Slewing Bearing offers:

Detailed installation manuals.

Online engineering support.

Guidance for lubrication, maintenance, and troubleshooting solution.

8. How do ZZ Slewing Bearing differ from competitors?

Full range of materials and heat treatments for various load conditions.

High precision and strict quality inspection standards.

Engineering support before and after delivery.

Customization to exact equipment requirements.

Proven performance in cranes, excavators, robotics, wind turbines, and heavy machinery etc.

ZZ Slewing Bearing (Shanghai) Co., Ltd

Leading Slew Drive & Slewing Bearing Manufacturer in China.

ZZ products are applied globally in solar tracking systems, wind power systems, satellite communications, and numerous other globally connected industries.