VLU200844 Slewing Bearings

VLU200844 Slewing Bearings — Flanged Light Series Four-Point Contact Ball Bearing

VLU200844 Slewing Bearings use a gearless, flanged single-row four-point contact ball design with an 844 mm raceway diameter, 734 mm bore, 948 mm outside diameter, and 56 mm height, weighing 48.0 kg. Each ball contacts four raceway points simultaneously, allowing the ring to carry axial loads, radial loads, and tilting moments in a single compact unit. This light-series configuration suits rotary applications where smooth rotation and reduced weight matter.

Technical Specifications

Product Design & Key Features

The four-point contact ball arrangement means each ball contacts four raceway points at once. This lets a single ring handle combined axial, radial, and tilting-moment loads without an additional bearing row, which reduces both axial stack height and assembly complexity.

The outer ring is flanged and gearless. The 12 mm flange with T/t 12 mm centering lands mounts directly onto the machine frame using 14 × 18 mm through-holes on a 920 mm bolt circle. No counterbore or separate locating ring is required.

At 48.0 kg, this light-series ring is approximately 20% lighter than the standard-series VSU200844 (60 kg). This weight difference is relevant for designs where rotating mass or structural load on the support frame is a consideration.

Material & Sealing

Ring material is available in 50Mn or 42CrMo4 alloy steel. Both grades undergo induction hardening on the raceways to achieve surface hardness suitable for bearing loads, while the core retains ductility to absorb shock without cracking.

GCr15 bearing steel balls provide consistent fatigue resistance across extended rotation cycles. Double-lip NBR seals on both sides retain grease and limit contaminant ingress under normal operating conditions.

The Standard_VL clearance — radial 0–0.5 mm, axial tilting 0–0.7 mm — is intentionally set wider than the standard series. This suits free-running light-duty pivots where low rotational resistance is more important than maximum rigidity.

Driving a Gearless Slewing Ring

Because the VLU200844 has no integrated gear teeth, the drive system connects via an external pinion, chain or belt, friction wheel, or a motor-gearbox unit acting on the outer structure.

This arrangement keeps the unit price lower and allows you to select the drive ratio and drive type independently from the bearing. For indexing or positioning tasks, an external motor with a side-mounted pinion is a common configuration on packaging and processing lines.

Application Areas

The VLU200844 Slewing Bearings flanged light-series slewing ring is used in applications where low-to-moderate combined loads, smooth rotation, and a compact flange mount are the primary requirements.

Filling & Packaging Machines — Rotary fillers and capping carousels use the flange mount for direct attachment to the machine frame. The Standard_VL clearance supports free-running rotation at low drive torque.

Food & Beverage Processing — Bottle-line turntables and pasteurizer carousels benefit from the sealed NBR design, which limits grease loss and contaminant entry during normal operation.

Solar Trackers & Slewing Drives — The 844 mm raceway suits mid-to-large tracker structures. The flanged ring mounts directly onto the frame without a counterbore, reducing on-site installation steps.

Rotary Indexing Tables — Assembly turntables and rotary indexers use external drive pinions alongside this ring when an under-table drive arrangement is not preferred.

Collaborative Robots & Automation — Robotic base turntables benefit from the flange design, which removes the need for a machined seat in the robot base and simplifies assembly.

Medical & Laboratory Equipment — Imaging gantries and lab turntables require smooth, low-load rotation. The single-row four-point contact design handles this with low noise and vibration.

Light Material Handling — Carousel conveyors, pallet rotators, and similar equipment operate within the load range this light-series bearing is sized for.

Why Choose Heng Guan Bearing?

Luoyang Heng Guan Bearing Technology Co., Ltd. produces slewing rings from 50 mm to 10,000 mm in diameter across P0, P6, P5, and P4 precision grades. The production floor includes CNC vertical lathes, CNC quenching machines, CNC gear shapers, machining centers, grinding machines, and large gear hobbing machines.

Every ring is inspected using coordinate measuring machines, vibration testers, and life testing machines. Full material traceability is maintained from raw steel to finished product. Products comply with DIN, ISO, and GB standards, and the company holds ISO 9001 certification with RoHS compliance.

MOQ is 1 piece. Custom options include bolt patterns, materials, seals, surface treatments, precision grades, and clearance values. OEM/ODM partnerships are supported.

Packaging & Shipping

Each VLU200844 slewing bearing is individually wrapped with anti-rust film, placed in a wooden case, and secured to prevent movement during transport. Standard export packaging is used for all international shipments.

FAQ

Q: What is the VLU200844?

A: The VLU200844 is a gearless, flanged four-point contact ball slewing ring from the light series. It has an 844 mm raceway diameter, 734 mm bore, 948 mm outside diameter, and 56 mm height, weighing 48.0 kg.

Q: What are the full dimensions of the VLU200844?

A: Bore 734 mm (28.90 in), outside diameter 948 mm (37.32 in), height 56 mm (2.21 in), weight 48.0 kg. Mounting uses 14 × 18 mm flange holes on a 920 mm bolt circle and 18 × 18 mm inner holes on a 762 mm circle, with 12 mm centering lands.

Q: What is the load capacity of the VLU200844?

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

Q: How does the VLU200844 compare to the VSU200844?

A: Both are gearless four-point contact rings on an 844 mm raceway. The VLU200844 is the flanged light series (734 mm bore, 948 mm OD, 48.0 kg, C0a 600 kN). The VSU200844 is the standard series with a higher static axial load rating of C0a 1,360 kN — approximately 2.27× higher. Selection should be based on your actual duty load requirements.

Q: How is a gearless slewing ring driven?

A: By external pinion, chain or belt drive, friction wheel, or motor via gearbox. The ring itself has no gear teeth. This reduces unit cost and allows independent selection of drive ratio and drive type.

Q: Can this bearing operate in sub-zero temperatures?

A: Yes. The rated operating temperature range is -25 to +80 °C. For applications at the lower end of this range, confirm that your grease selection is rated for the intended low-temperature conditions.

Contact Us

Do you have more questions about VLU200844 Slewing Bearings? Send your enquiry or drawing to info@hgbearings.com.