ZZ Slewing Bearing

Non gear slewing bearing for rotary table

A non-gear slewing bearing is an excellent choice for rotary tables, especially in applications where smooth rotation and flexible drive options are required. Unlike traditional slewing rings with internal or external gear teeth, gearless slewing rings offer improved motion control and reduced mechanical noise.

Slewing Bearing Packaging

At ZZ, we design and manufacture high-precision non-gear slewing bearings tailored for rotary tables used in:

  • Welding positioners
  • CNC indexing systems
  • Robotic assembly lines
  • Inspection turntables
  • Industrial automation platforms

These bearings are particularly suitable for situations where the drive mechanism is external, such as with belt, worm gear, or direct motor coupling. As a result, the overall structure becomes more compact and easier to maintain.

Moreover, gearless slewing bearings offer zero backlash, which is critical for precision positioning and repeatable movement. With no gear engagement, the rotation becomes smoother, while vibration and wear are significantly reduced.

Small Gearless Slewing Bearing

Key Benefits

  • First, their smooth and silent operation makes them ideal for sensitive environments.
  • Second, they are highly customizable, including mounting holes and sealing options.
  • Additionally, we offer different internal structures such as ball bearing, cross roller, or three-row roller depending on load requirements.
  • Furthermore, the bearings are sealed and pre-lubricated, reducing maintenance needs.

Whether you’re designing a compact rotary table for a medical device or upgrading a large industrial welding platform, ZZ can provide a slewing ring to match your specific needs.

Application Example

For instance, a client from Germany requested a 950mm non-gear slewing ring for a laser welding rotary table. We designed a cross roller structure with a customized bolt pattern, achieving 0.02mm rotational runout — well within their high-precision requirements.

How to Get a Quote

  • To receive a fast and accurate quotation, simply provide:
  • Outer and inner diameters of your rotary base
  • Load direction and speed requirements
  • Any CAD or engineering drawings (PDF/DWG)

Our engineering team will assist you throughout the process, from technical confirmation to global delivery.

 

Frequently Asked Questions

Expert Insights and Reliable Solutions to Your Most Common Questions.

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.

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.

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)

Correct installation with flat surfaces.

Proper lubrication using grease.

Avoid overloading or shock loads over capacity.

Monitor operating conditions regularly to prevent debris entry.

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.

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

Yes — ZZ Slewing Bearing offers:

Detailed installation manuals.

Online engineering support.

Guidance for lubrication, maintenance, and troubleshooting solution.

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.

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