Product Details

The W series open slew drive system performs well in some special environments. For scenarios that require operation in high or low temperatures or in corrosive environments, open-structure designs may more easily adapt to these extreme conditions without worrying about damage to the sealed structure.

For teaching and demonstration purposes, open slew drive systems are widely used. Its high visibility makes it an ideal tool for demonstrating mechanical principles, transmission structures and motion laws in teaching institutions and training environments. Students are able to better understand the basic concepts of mechanical engineering by observing actual operating processes.

In addition, open slew drive systems also play an important role in research and development. Researchers often need to observe and debug mechanical systems in real time, and visibility is a key factor. The open design provides them with a more intuitive means of observation, helping to quickly identify problems and optimize the design.

Specification

The open slew drive system is a mechanical system with an open structure, mainly used to rotate equipment or tools in the horizontal direction. Unlike closed designs, the internal mechanical components of open rotary drive systems are visible to the outside world, which provides some unique advantages in terms of operation, maintenance and teaching.

First, the open slew drive system offers excellent visibility. Because the internal structure is visible to operators or maintenance personnel, they can visually observe the operation of the drive system. This is very helpful during troubleshooting, daily monitoring and maintenance, improving system reliability.

Secondly, open slew drives usually adopt a lightweight design. To ensure visibility of internal mechanical components, systems tend to be more compact and overall lighter.

Model	Output Torque	Tilting Moment Torque	Holding Torque	Gear Ratio	Tracking Precision	Weight	Drawing
W7	3.5 KN.m	14.2 KN.m	20 KN.m	47:1	≤0.15°	29kg
W7	2583 lbf.ft	10.5×10³ lbf.ft	14.8×10³ lbf.ft	47:1	≤0.15°	29kg

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.