VSU200744 Slewing Bearings
Gear: Gearless (no gear teeth), driven by external pinion / chain / friction / motor
Dimensions: bore 672 mm × OD 816 mm × height 56 mm, weight 52.02 kg (Schaeffler medias official)
Load capacity: dynamic axial Ca = 171 kN, static axial C0a = 1,200 kN, dynamic radial Cr = 155 kN, static radial C0r = 550 kN
Max. radial load on fixing screws Fr zul = 165.2 kN (friction-locking mount)
Clearance spec: Standard_SL: 0–0.3 mm; precision class P0 / P6 / P5 available
Material: 50Mn / 42CrMo4 rings, GCr15 balls, double-lip NBR seals, -25 to +80 °C operating range
Standard series envelope — mounting-compatible with the whole VSU Standard 20 family across the 414 → 1094 (or 755 → 1055) raceway range
Primary application: Solar Trackers (utility-scale PV farm single/dual-axis tracker)
- Product Description
VSU200744 Slewing Bearings — INA VSU Standard 20 Series Four-Point Contact Ball Slewing Ring
VSU200744 Slewing Bearings belong to the INA VSU Standard 20 series. The series is a gearless, single-row, four-point contact ball slewing ring with a raceway diameter of 744 mm and a section height of 56 mm. The single-row bearing is capable of handling axial loads, radial loads and tilting moments, making it a suitable alternative for solar tracker pivots, mid-to-heavy cranes and excavator swing frames where installation space is limited but load needs are significant.
What Is the VSU200744?
The VSU200744 Slewing Bearings is a single row four point contact ball slewing ring from the INA VSU Standard 20 series. Its gearless outer profile does not have any gear teeth cut into the ring. Rotation is carried externally via a pinion on a separate gear ring, a chain drive, a friction wheel or a motor attached directly to the turntable construction.
The four point contact ball architecture enables one row of balls to take axial loads, radial loads and tilting moments simultaneously. This maintains a compact envelope compared to multi-row roller designs, while giving a static axial load capacity of C0a = 1,200 kN — greater than the smaller VSU200644 (C0a = 1,040 kN) within the same 56 mm section height.
The ring is scaled on the VSU 20 series to the VSU200744 catalogue values for 414-1,094 mm raceway diameters. When replacing an original INA VSU200744 or obtaining an equivalent, the mounting dimensions match perfectly the Schaeffler catalogue.
Full Specifications
Parameter | Value |
Model | VSU200744 |
Raceway Diameter (DL) | 744 mm |
Inner Ring Bore (di) | 672 mm |
Outside Diameter (Da) | 816 mm |
Total Height (H) | 56 mm |
Weight | 52.02 kg |
Dynamic Axial Load (Ca) | 171 kN |
Static Axial Load (C0a) | 1,200 kN |
Dynamic Radial Load (Cr) | 155 kN |
Static Radial Load (C0r) | 550 kN |
Max. Radial Load on Fixing Screws (Fr zul) | 165,200 N |
Outer Bolt Circle (La) / Qty | 790 mm / 40 holes |
Inner Bolt Circle (Li) / Qty | 698 mm / 40 holes |
Radial Clearance | Standard_SL: 0–0.3 mm |
Operating Temperature | −25 °C to +80 °C |
Ring Material | 50Mn / 42CrMo4 |
Ball Material | GCr15 |
Seal | Double-lip NBR |
Precision Class | P0 / P6 / P5 |
Structure | Four-point contact ball / single row |
Source: Schaeffler medias official catalogue.
Materials
The rings are made from 50Mn or 42CrMo4 alloy steel. Both grades combine core toughness with surface wear resistance after induction hardening. Balls are GCr15 bearing steel, a high-carbon chromium grade used broadly in slewing ring applications for consistent fatigue performance. The double-lip NBR seals retain grease and limit contaminant ingress. The −25 °C to +80 °C operating range suits most outdoor PV farm and construction site conditions.
Application Areas
Solar Trackers
Utility-scale PV farms utilising single- or dual-axis trackers require a large envelope pivot bearing capable of sufficient tilt-moment capacity. The 744 mm raceway gives structural breadth to longer tracker rows and the sealed gearless ring is used with linear actuators or external pinion drives. Operating temperature range includes desert, temperate and cold-climate settings.
Cranes & Lifting Equipment
The static margin for tower cranes and mobile cranes of the middle to heavy class is C0a=1,200 kN. The four-point contact ball construction can bear combined axial load and tilting moment in load swing.
Construction Excavator and Excavators
This raceway band is used for bearings in excavator swing frames and material handlers in the mid-heavy class . The NBR double-lip seals restrict the passage of dust, dirt and water on construction sites.
Rotary Indexing Tables & Turntables
Packaging turntables, conveyor diverters, etc. are powered by chain or friction wheel of the gearless rings. The 790 mm outer circle and 698 mm inner circle 40-hole bolt design matches conventional big turntable mounting plates.
Yaw Systems for Wind Turbines
The medium-size wind turbines are fitted with gearless yaw rings. Here an external pinion drive means that the bearing ring itself does not need to be precision gear machined.
Platforms and Antenna for Radar
Radar dishes and satellite antennas need to turn with Optimal working clearance and consistent rotation. The Standard_SL has a 0-0.3 mm clearance and P5 precision class for precise tracking.
Why Heng Guan Bearing?
Luoyang Heng Guan Bearing Technology Co., Ltd. is based in Luoyang, a recognized bearing production center in China, with more than 20 years of industry experience and a team of 50+ R&D and manufacturing professionals. The company holds ISO 9001 certification and RoHS compliance, and exports to more than 50 countries.
· Factory-direct supply from Luoyang — no intermediary
· MOQ 1 pc — suitable for OEM replacement, project sampling, and volume orders
· OEM/ODM support — precision class (P0/P6/P5), surface treatment, and non-standard dimensions available on request
· On-site equipment includes CNC vertical lathes, CNC quenching machines, CNC gear shapers, grinding machines, and large gear hobbing machines
· Technical support — installation guidance and dimensional consultation available
· Stock items ship within 5–7 days; production lead time confirmed at order
FAQ
Q: What is VSU200744?
A: The VSU200744 is a gearless, single-row, four-point contact ball slewing ring of the INA VSU Standard 20 series. It has a raceway diameter of 744 mm, a bore of 672 mm, an outside diameter of 816 mm, a height of 56 mm and weighs 52.02 kg.
Q: What are the bolt patterns?
A: 40 holes on 790mm outside bolt circle and 40 holes on 698mm inner bolt circle.
Q: What’s the weight limit on it?
A: Dynamic axial load Ca = 171 kN Static axial load C0a = 1,200 kN Dynamic radial load Cr = 155 kN Static radial load C0r = 550 kN . Maximum radial load on attaching screws 165200 N. All values are taken from the official Schaeffler medias catalogue.
Q: What is the difference between VSU200744 and VSU200644?
A: They both have the same 56 mm section height. The VSU200744 has a raceway of 744 mm, a weight of 52.02 kg and gives C0a = 1,200 kN. The VSU200644 has a 644 mm raceway and weighs 44.4 kg, providing C0a = 1,040 kN.
Q: How does a gearless slewing ring work?
A: By gear teeth to the ring, without gear teeth to the ring, by an external pinion on a separate gear ring, by a chain or belt drive, by a friction wheel, or by a motor attached to the turntable construction.
Q: Does this bearing replace the INA VSU200744 bearing exactly?
A: Yes. INA reference designation is VSU200744. The product is built to the identical mounting dimensions to be a direct dimensional replacement.
Q: Do you have it in stock?
A: Stock models ship in 5-7 days. MOQ: 1 pcs. Call us for current availability, CAD drawings and price.
Contact Us
For pricing, stock availability, or technical questions about VSU200744 Slewing Bearings, reach our team at mia@hgb-bearing.com. MOQ is 1 pc.
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