VLA200844-N Slewing Bearings

VLA200844-N Slewing Bearings — Flanged Light Series External Gear Four-Point Contact Ball Bearing

VLA200844-N Slewing Bearings are flanged light-series, single-row four-point contact ball slewing rings with an external gear on the outer ring. The bore measures 734 mm, outside diameter 950.1 mm, and total height 56 mm, with a weight of 65.6 kg. The external gear runs module m8 with 117 teeth. Static axial load capacity C0a is 600 kN. These bearings suit low-speed rotary platforms where compact envelope and weight matter.

Full Technical Specifications

Product Design

The single-row four-point contact ball design allows one ball row to carry axial, radial, and tilting moment loads simultaneously. This keeps the assembly height to 56 mm while handling the combined load conditions typical of rotary platforms. The raceway diameter of 844 mm provides a stable moment arm without requiring a double-row configuration.

The external gear — module m8, tooth count z117 — is machined directly on the outer ring. It engages a side-mounted pinion or worm drive without an intermediate adapter, which is a common arrangement in solar tracker slewing drives and light-duty turntable installations.

The 12 mm flange with T/t 12 mm centering lands bolts flat to the mating structure. No counterbore or secondary locating ring is needed, which reduces the number of machined features on the host frame.

The Standard_VL clearance class sets radial play at 0–0.5 mm and axial tilting clearance at 0–0.7 mm. This wider tolerance band accommodates light pivots where thermal expansion and minor angular misalignment are normal operating conditions.

Materials and Sealing

Ring blanks are made from 50Mn or 42CrMo4 alloy steel, both quenched and tempered to provide core toughness. Raceways are induction-hardened to 55–62 HRC, giving a wear-resistant contact surface while the core retains ductility to absorb shock.

Rolling elements are GCr15 high-carbon chromium steel balls, selected for consistent fatigue performance across varied load cycles. Double-lip NBR seals are fitted on both sides to retain grease within the raceway channel and block particulate ingress during operation.

Application Areas

The VLA200844-N Slewing Bearings with C0a 600 kN fits low-speed, moderate-load rotary applications. Typical uses include:

· Solar Trackers and Slewing Drives — the external m8/z117 gear pairs directly with worm-drive actuators used in single-axis and dual-axis tracker systems

· Filling and Packaging Machines — rotary fillers and capping carousels benefit from the sealed raceway and Standard_VL free-running clearance

· Food and Beverage Processing — bottle-line turntables and pasteurizer carousels operate with the double-lip NBR seal arrangement

· Rotary Indexing Tables — under-table pinion drive keeps the working deck clear of drive components

· Automation and Robotic Bases — turntable pedestals mount the drive gearbox inside the bore using the internal diameter

· Agricultural Excavator — planter turntables and sprayer boom pivots running under moderate field loads

· Light Material Handling — carousel conveyors and pallet rotators within the light-series load band

VLA200844-N vs. VSA200844-N

Both bearings use an 844 mm raceway diameter and external gear m8/z117, but their load ratings and series differ significantly.

The VSA carries 2.3× the static axial load of the VLA. If your duty load stays within C0a 600 kN, the VLA200844-N offers a lighter and more compact solution. For heavier crane or industrial duty cycles, the VSA series is appropriate.

Cross-Reference

This bearing is manufactured to the INA / Schaeffler VLA 200 844-N dimensional standard. It is commonly cross-referenced to:

· SKF RKS.21 0841 (light-series external-gear equivalent)

· Kaydon RK6 series

· Rothe Erde E.950.20.00.C

· Rollix 21-0841-01

Brand names and model numbers are cited for dimensional reference only. Heng Guan manufactures to the identical mounting standard and is not affiliated with the brands listed above.

Quality and Production

Each bearing goes through coordinate measuring machine inspection and vibration testing before dispatch. Full process traceability covers raw material receipt through to finished product shipment. Production equipment includes CNC vertical lathes, CNC quenching machines, CNC gear shapers, machining centers, grinding machines, and large gear hobbing machines. Precision classes P0, P6, and P5 are available.

FAQ

Q: What does the "N" suffix mean in VLA 200 844-N?

A: The "N" suffix in the INA / Schaeffler naming convention denotes normalized gear teeth on the bearing ring: the gear teeth are produced in the normalized condition, not in a flanged-only design In this designation convention, H denotes hardened gear teeth while N denotes normalized gear teeth.

Q: What are the full dimensions of the VLA200844-N?

A: Bore 734 mm, outside diameter 950.1 mm, total height 56 mm, flange height 12 mm, weight 65.6 kg. Outer flange bolt circle is 885 mm with 18 holes; inner bolt circle is 762 mm with 18 holes.

Q: What is the gear specification?

A: The external gear is on the outer ring: module m8, tooth count z117. Standard_VL clearance is radial 0–0.5 mm and axial tilting 0–0.7 mm.

Q: What are the load ratings?

A: Dynamic axial Ca = 180 kN, static axial C0a = 600 kN, dynamic radial Cr = 163 kN, static radial C0r = 224 kN.

Q: How does VLA200844-N differ from VSA200844-N?

A: Both share the 844 mm raceway and m8/z117 external gear, but the VSA is the standard series with C0a 1,360 kN — 2.3× higher than the VLA's 600 kN. Select based on your verified duty load.

Q: Which brand bearings does this cross-reference?

A: SKF RKS.21 0841, Kaydon RK6, Rothe Erde E.950.20.00.C, and Rollix 21-0841-01. All brand references are for dimensional identification only.

Contact Us

For quotes or technical questions about VLA200844-N Slewing Bearings, email us at mia@hgbearings.com. We will respond as soon as possible.