VLA200544-N Slewing Bearings

VLA200544-N Slewing Bearings — Flanged Light Series External Gear Slewing Ring, INA/Schaeffler VLA Compatible

VLA200544-N Slewing Bearings are a flanged Light Series 20 four-point contact ball slewing ring with an external gear on the outer ring. Built to INA/Schaeffler VLA series dimensional specifications, this bearing carries a 544 mm raceway diameter, 640.3 mm outside diameter, 434 mm bore, 56 mm height, and a weight of 41.7 kg. The static axial load rating is C0a 385 kN, and the external gear is m6/z105. Heng Guan Bearing manufactures and exports this series from Luoyang, China.

What Is the VLA200544-N Slewing Ring?

The products belong to the INA VLA Light Series 20 — a flanged external-gear four-point contact ball slewing ring family. The four-point contact ball design allows a single row of GCr15 balls to carry axial, radial, and tilting moment loads simultaneously, which simplifies bearing arrangement in compact rotary drive systems.

The external gear (m6/z105) is machined on the outer ring, enabling direct engagement with a side-mounted pinion or worm drive. The flanged mounting interface with centering lands allows direct bolting to a structural frame without a separate locating ring.

Full Technical Specifications

Product Features

Four-Point Contact Ball Design

A single row of GCr15 balls contacts four points on the raceway, enabling combined axial, radial, and tilting moment load handling in one compact unit. This reduces the number of bearing rows required in a rotary assembly.

External Gear m6/z105 on Outer Ring

The module 6, 105-tooth external gear allows direct engagement with a pinion or worm drive mounted alongside the ring. The bore can house the pivot Shaft or platform hub, keeping the drive arrangement within a small radial envelope.

Flanged Light-Series Mounting Interface

The 12 mm flange with T/t 12/12 mm centering lands bolts directly to a structural frame. The outer flange bolt circle at 585 mm carries 14 × M12 threaded holes (thread depth 20 mm); the inner bolt circle at 462 mm carries 14 × 18 mm through holes.

Light-Series Load and Weight Profile

At 41.7 kg with a static axial rating of C0a 385 kN, this bearing is sized for light-duty rotary platforms. For reference, the VSA 200 544-N standard series carries a C0a of 870 kN at a higher weight. The VLA series is the appropriate choice for light-load applications where mass and envelope are constrained.

Standard_VL Clearance

Radial clearance of 0–0.5 mm and axial tilting clearance of 0–0.7 mm are defined under the Standard_VL specification, which is intended for free-running pivots in light-load continuous rotation applications.

Ring and Ball Materials

Rings are manufactured from 50Mn or 42CrMo4 alloy steel. GCr15 bearing steel balls are used throughout. Double-lip NBR seals are fitted as standard on both sides.

Typical Application Areas

Solar Trackers and Slewing Drives

The -25 to +80 °C operating range is compatible with outdoor PV farm environments. The external gear engages a pinion mounted inside the support column, which keeps the drive mechanism protected from weather exposure.

Filling and Packaging Machines

Rotary fillers and capping carousels are a primary application for this light series. The Standard_VL clearance supports smooth continuous rotation, and the double-lip NBR seals provide protection in washdown environments.

Rotary Indexing Tables and Light Turntables

Assembly turntables and indexing tables can use the external gear ring with a centrally located pinion drive mounted below the table surface, creating a clean under-table drive configuration.

Collaborative Robots and Automation Equipment

Robotic base turntables use this flanged ring type when the drive gearbox is housed inside the pedestal. The flange interface mounts directly to the robot base structure.

Medical and Laboratory Equipment

Imaging gantries and laboratory turntables require smooth, low-load rotation in a compact footprint. The sealed construction and flanged mounting suit this class of equipment.

Materials and Quality Control

Ring blanks in 50Mn or 42CrMo4 are verified for chemical composition before machining. CNC gear-shaping and gear-hobbing equipment produce the m6/z105 external teeth to consistent tooth profile accuracy.

Each bearing is tested using coordinate measuring machines, vibration testers, and life testing equipment. Batch traceability is maintained from raw material through to finished product. Products are manufactured to DIN, ISO, and GB standards and are RoHS compliant. The factory holds ISO 9001 certification.

Production equipment includes CNC vertical lathes, CNC quenching machines, machining centers, and grinding machines.

Interchangeability and Cross-Reference

VLA200544-N Slewing Bearings manufactured by Heng Guan are dimensionally compatible with the original Schaeffler/INA VLA 200 544-N specification. Cross-reference equivalents include:

· SKF RKS.21 0541 (light-series external-gear equivalent)

· Kaydon RK6-22E1Z

· Rothe Erde 231.20.0500 / E.650.20.00.C

· Rollix 21-0541-01

All brand names are referenced for compatibility identification only. Heng Guan Bearing is an independent manufacturer and is not affiliated with the brands listed above.

Supply and Customization Options

MOQ is 1 pc. Stock items ship within 5–7 days. For non-standard requirements, the following configurations are supported:

· Custom bolt patterns and flange configurations

· Alternative ring materials: 50Mn or 42CrMo4

· Seal compound alternatives to standard NBR

· Surface treatment options

· Precision grades: P0, P6, or P5

· Custom clearance specifications

Technical consultation, installation guidance, legacy product cross-referencing, and non-standard part customization are available. Engineering response is provided within 24 hours of inquiry.

FAQ

Q: What are the key dimensions of the VLA 200 544-N?

A: Raceway diameter 544 mm, bore 434 mm, outside diameter 640.3 mm, total height 56 mm, weight 41.7 kg. External gear is m6/z105 on the outer ring.

Q: What is the load capacity?

A: Dynamic axial Ca = 152 kN, static axial C0a = 385 kN; dynamic radial Cr = 138 kN, static radial C0r = 144 kN.

Q: What is the difference between the VLA 544 and VSA 544?

A: Both are external-gear four-point contact rings on a 544 mm raceway. The VLA 200 544-N is the flanged light series (434 mm bore, 640.3 mm OD, 41.7 kg, C0a 385 kN). The VSA 200 544-N is the standard series with C0a 870 kN. Selection depends on actual load requirements.

Q: What gear specifications does the VLA 544 use?

A: External gear on the outer ring: module m6, tooth count z105. Standard_VL radial clearance is 0–0.5 mm; axial tilting clearance is 0–0.7 mm. Double-lip NBR seals are standard.

Q: Which brands does the VLA 544 cross-reference?

A: SKF RKS.21 0541, Kaydon RK6-22E1Z, and Rothe Erde 231.20.0500 / E.650.20.00.C. Heng Guan manufactures to the INA VLA dimensional standard.

Contact Us

For a quote or technical inquiry on VLA200544-N Slewing Bearings, email us at mia@hgbearings.com. We respond within 24 hours.