VSU201094 Slewing Bearings

VSU201094 Slewing Bearings — INA Four-Point Contact Ball Gearless Slewing Ring

VSU201094 Slewing Bearings are gearless, single-row, four-point contact ball slewing rings from the INA VSU Standard Series 20 family. This model carries combined axial, radial, and tilting moment loads through a single ball row within a compact 56 mm section height. Manufactured by Luoyang Heng Guan Bearing Technology Co., Ltd., these rings are built to the same dimensional standards as the original Schaeffler INA reference and are available in precision classes P0, P6, and P5.

What Is the VSU201094 Slewing Ring?

The VSU201094 belongs to the INA VSU Standard Series 20, with raceway diameters ranging from 414 mm to 1,094 mm, all with the same 56 mm section height. There are no gear teeth machined into the ring because of the gearless design. Drive is provided via an external pinion on a customer gear ring, chain or belt drive, friction wheel or hydraulic or electric motor directly attached to the platform.

All the sizes in the VSU Standard 20 range have their unique bolt circles. The range is from 24 holes for the 414 mm size to 48 holes for the 1,094 mm size. The pitch circle and number of holes vary with diameter. The VSU201094 has 48 holes on a 1,140 mm outer circle and 48 holes on a 1,048 mm inner circle. A unit of the same designation bolts directly on to the current structure. Changing to another size in the series needs the mating frame to be re-checked.

Technical Specifications

Design and Material Notes

Single-row four-point contact structure. One ball row simultaneously handles axial, radial, and tilting moment loads. This keeps the section height at 56 mm while maintaining a static axial capacity of 1,770 kN.

Ring and ball materials. Rings are produced from 50Mn or 42CrMo4 steel. Raceways undergo induction hardening to 55–62 HRC. Rolling elements use GCr15 bearing steel. Double-lip NBR seals are rated for −25 °C to +80 °C continuous operation.

Mounting. Bore tolerance is +0.7/0 mm and OD tolerance is −0.7/0 mm, both held to the catalogue values. The 48-hole fixing pattern is specific to this size and is not shared with other diameters in the series, so a replacement of the same designation is direct while a change of size requires the mating structure to be re-checked.

Precision and clearance options. Standard radial clearance is 0–0.3 mm (Standard_SL). Axial tilting clearance is 0–0.53 mm. Reduced clearance and preloaded variants are available on request.

Comparison: VSU, VSI, and VSA 201094

All three variants share the Series 20 envelope: 56 mm section height and 1,094 mm raceway diameter. The difference lies in drive configuration and weight.

Select VSU201094 when no gear teeth are required on the ring and the drive system is handled externally.

Typical Application Areas

VSU201094 slewing bearings are used in applications requiring large-diameter rotation with combined load handling:

· Cranes and lifting equipment — Tower crane slewing heads and gantry pivots where tilt-moment capacity is the primary load case

· Large solar trackers — The 1,770 kN static axial rating supports heavy tracker frames; sealed NBR construction suits outdoor year-round exposure

· Wind turbine yaw systems — Gearless rings in the 1 m diameter range paired with external pinion drives

· Rotary platforms and indexing tables — Material handling turntables driven by chain or friction wheel

· Radar and antenna mounts — Large dish and radio telescope structures requiring stable large-diameter rotation

· Industrial gantries — Applications requiring smooth, low-torque rotation at large diameters

· Offshore and marine deck equipment — Winches and deck cranes in salt-spray environments

Manufacturing and Quality

Heng Guan holds ISO 9001 certification. Products meet DIN, ISO, and GB dimensional and quality standards and are RoHS compliant. Production equipment includes CNC vertical lathes, CNC quenching machines, CNC gear shapers, machining centers, and grinding machines. Inspection uses coordinate measuring machines and vibration testers.

FAQ

Q: What are the exact dimensions of VSU201094?

A: Bore 1,022 mm, outside diameter 1,166 mm, height 56 mm, weight 77 kg. Fixing pattern: 48 holes of Ø14 mm on a 1,140 mm outer bolt circle and 48 on a 1,048 mm inner bolt circle, sized for M12 bolts. Neither ring is threaded — the bolts pass through the ring and thread into the mating structure. Bore tolerance +0.7/0 mm; OD tolerance −0.7/0 mm.

Q: What is the difference between VSU201094 and VSI/VSA 201094?

A: All three share the 56 mm section height and 1,094 mm raceway. VSU201094 is gearless at 77 kg. VSI201094-N carries internal gear teeth (m8/z125) at 91 kg. VSA201094-N carries external gear teeth (m8/z148) at 91 kg. Selection depends on your drive configuration.

Q: How is the gearless VSU201094 driven?

A: Drive is delivered by an external pinion on a customer gear ring, a chain or belt system, a friction wheel, or a hydraulic or electric motor connected to the platform structure.

Q: Is VSU201094 interchangeable with the original INA reference?

A: VSU201094 is the INA reference designation for this size. Heng Guan manufactures to the same catalogue dimensions as an independent supplier; the designation is used for identification only and does not imply origin from Schaeffler.

Q: What clearance and precision options are available?

A: Standard radial clearance is 0–0.3 mm; axial tilting clearance is 0–0.53 mm. Precision classes P0, P6, and P5 are available. Reduced clearance and preloaded variants can be arranged on request.

Q: How often should VSU201094 be relubricated?

A: Relubrication intervals depend on operating conditions and are not specified in the standard product documentation. For guidance specific to your application — load cycle, rotation speed, and environment — consult your engineering team or Contact Us directly.

Contact Us

Do you have more questions about VSU201094 Slewing Bearings? For quotes or technical confirmation, contact us at mia@hgb-bearing.com. We will respond to your inquiry as promptly as possible.