VLU200944 Slewing Bearings
Dimensions: 834 mm bore × 1048 mm OD × 56 mm height; weight approx. 54.1 kg.
Design: Gearless, flanged outer ring with direct bolt mounting and no counterbore required.
Load Capacity: C0a up to 670 kN, suitable for light-load and low-speed rotary applications.
VLU vs. VSU: VLU 944 is the Light Series, with about 2.3× lower C0a than VSU 944 (1541 kN).
Key Application: Collaborative robots and automation equipment, with the 834 × 1048 × 56 mm size suited to large rotary mechanisms.
Other Applications: Filling & packaging, food processing, indexing tables, medical equipment, solar trackers, and wastewater clarifiers.
Performance: Double-lip NBR seals, 50Mn/42CrMo4 rings, GCr15 balls, and radial clearance of 0–0.5 mm.
Interchangeability: Direct replacement for Schaeffler VLU 944, with cross-reference options for SKF light-series equivalents.
Supply & Customization: MOQ 1 pc; stock ships in 2–3 days, with customization for bolt patterns, materials, seals, surface treatment, precision, and clearance.
- Product Description
VLU200944 Slewing Bearings — Flanged Light Series Four-Point Contact Ball Bearing for Precision Rotation
VLU200944 Slewing Bearings belong to the INA-compatible flanged light series 20, combining a 944 mm raceway diameter with a single-row four-point contact ball design that handles axial, radial, and tilting loads in one compact unit. Weighing 54.1 kg against an outside diameter of 1048 mm, the gearless flanged ring bolts directly onto a structural frame without additional locating hardware. Luoyang Heng Guan Bearing Technology Co., Ltd. manufactures this series under ISO 9001 certification and RoHS compliance.
Product Specifications
All dimensions follow INA VLU light series 20 standards and are interchangeable with Schaeffler VLU 944 references.
Parameter | Value |
Raceway Diameter | 944 mm |
Inner Ring Bore (d) | 834 mm (32.83 in) |
Outside Diameter (D) | 1048 mm (41.26 in) |
Total Height (H) | 56 mm (2.21 in) |
Flange Height (hf) | 12 mm |
Centering Diameter (hA) | 20 mm |
Centering Lands (T/t) | 12/12 mm |
Fixing Bore (dB) | 18 mm (through holes, no thread) |
Outer Flange Bolt Circle (La) | 1020 mm / 16 holes (18 mm through) |
Inner Bolt Circle (Li) | 862 mm / 20 holes (18 mm through) |
Max. Radial Load on Fixing Screws (Fr zul) | 124.8 kN |
Dynamic Axial Load (Ca) | 188 kN |
Static Axial Load (C0a) | 670 kN |
Dynamic Radial Load (Cr) | 170 kN |
Static Radial Load (C0r) | 250 kN |
Radial Clearance (Standard_VL) | 0–0.5 mm |
Axial Tilting Clearance | 0–0.7 mm |
Operating Temperature | -25 to +80 °C |
Structure / Row | Four-point contact ball / Single row |
Precision Class | P0 / P6 / P5 |
Ring Material | 50Mn / 42CrMo4 |
Ball Material | GCr15 |
Seal | Double-lip NBR |
Weight | 54.1 kg |
Key Design Advantages of the Light Series 20 Flanged Slewing Ring
The four-point contact ball design lets a single ball row engage four raceway contact points simultaneously. One row therefore carries axial loads, radial loads, and tilting moments together without requiring multiple rows, which reduces overall ring height and weight.
The gearless flanged outer ring carries no integrated gear teeth. Drive options include an external pinion, chain or belt drive, friction wheel, or motor-gearbox combination depending on machine layout. Removing the gear from the ring also simplifies replacement when the ring reaches end of service life.
The 12 mm flange height and T/t 12 mm centering lands allow direct bolting to a structural frame. No counterbore or separate locating ring is needed, which reduces assembly steps.
At 54.1 kg, the VLU light series is approximately 19% lighter than the standard-series VSU 944 (67 kg) at the same 944 mm raceway diameter. For applications running at low to moderate combined loads, the lighter ring reduces the structural load on the supporting frame.
The Standard_VL clearance band — radial 0–0.5 mm, axial tilting 0–0.7 mm — is wider than the standard series. This suits free-running pivots where smooth rotation at low loads matters more than high stiffness.
Typical Application Areas
Solar Trackers & Slewing Drives — The 944 mm raceway provides a stable pivot point for tracker structures. The flanged ring installs directly onto the frame without a counterbore, which simplifies field assembly.
Filling & Packaging Machines — Rotary fillers and capping carousels mount the flange directly to the machine frame. The Standard_VL clearance supports smooth rotation at the low speeds typical of these lines.
Food & Beverage Processing — Bottle turntables and pasteurizer carousels benefit from the double-lip NBR seal, which retains grease and resists ingress of water and fine particles during washdown.
Rotary Indexing Tables & Light Turntables — Assembly turntables and indexers in production lines run at low loads and precise angular steps. The single-row four-point contact design handles combined loads at these duty levels.
Collaborative Robots & Automation Equipment — Robotic base turntables using an external side pinion keep the base structure simple; the flange centering lands handle alignment without a machined seat.
Medical & Laboratory Equipment — Imaging gantries and laboratory turntables require smooth, low-load rotation. The GCr15 rolling elements and induction-hardened raceways are consistent with the precision requirements of this category.
Light Material Handling & Conveying — Carousel conveyors and pallet rotators operate within the C0a 670 kN static axial capacity. The gearless design allows straightforward drive inspection and service access.
Materials & Sealing
The ring is available in 50Mn or 42CrMo4 steel. Both grades undergo induction hardening to reach a raceway surface hardness of 55–62 HRC while keeping the core ductile for resistance to shock loading.
The rolling elements are GCr15 chrome steel balls, a standard material for precision bearing applications where consistent fatigue life and dimensional accuracy are required.
The double-lip NBR seal retains grease and blocks dust, water, and fine particles under normal operating conditions. This is relevant for outdoor solar tracker installations and food line environments where periodic washdown occurs.
The operating temperature range is -25 to +80 °C. For sub-zero applications, contact Heng Guan's engineering team to discuss appropriate steel grades and lubricant options.
Quality Control & Traceability
Every VLU200944 Slewing Bearings unit goes through in-process inspection on the production line. Coordinate measuring machines, vibration testers, and life testing machines verify dimensions and performance before shipment.
From raw material receipt to finished product, each production stage is recorded. This traceability allows customers to request documentation for incoming inspection, which is useful for OEM projects and audited procurement processes.
Heng Guan holds ISO 9001 certification, and all products are RoHS compliant. Dimensional standards follow DIN, ISO, and GB, allowing direct use in international equipment designs.
Supply, Customization & Lead Time
MOQ is 1 piece, allowing a single unit for prototype or test builds. Stock units typically ship within 2–3 business days from the Luoyang facility.
Custom configurations are available for bolt patterns, ring materials, seal types, surface treatments, precision grades (P0 / P6 / P5 / P4), and clearance classes. Reverse-engineering support from existing hardware is available, with 2D drawings provided on request.
OEM and ODM partnerships are supported for series production. Heng Guan's engineering team can confirm technical compatibility within 24 hours of receiving an inquiry.
FAQ
Q: What is the VLU200944?
A: VLU200944 is a gearless, flanged four-point contact ball slewing ring from the INA VLU light series 20, with a 944 mm raceway diameter, 834 mm bore, 1048 mm outside diameter, 56 mm height, and a weight of 54.1 kg.
Q: What are the mounting bolt details?
A: The outer flange has 16 × 18 mm through holes on a 1020 mm bolt circle. The inner ring has 20 × 18 mm through holes on an 862 mm bolt circle. Centering lands are T/t 12 mm. Grade 10.9 or 12.9 high-strength bolts are recommended given the structural loads involved.
Q: What are the load capacities?
A: Dynamic axial Ca = 188 kN, static axial C0a = 670 kN, dynamic radial Cr = 170 kN, static radial C0r = 250 kN.
Q: How does VLU200944 differ from VSU200944?
A: Both are gearless four-point contact rings on a 944 mm raceway. VLU200944 is the flanged light series (834 mm bore, 1048 mm OD, 54.1 kg, C0a 670 kN). VSU200944 is the standard series with C0a 1,520 kN — approximately 2.27× higher static axial capacity. Selection depends on the actual duty load of the application.
Q: How is a gearless slewing ring driven?
A: By external pinion, chain or belt drive, friction wheel, or hydraulic/electric motor via gearbox. The ring carries no gear teeth, which lowers unit cost and simplifies replacement compared to integrated-gear variants.
Contact Us
Do you have more questions about VLU200944 Slewing Bearings? For a quote or technical confirmation, email mia@hgbearings.com.
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