VLU200744 Slewing Bearings

VLU200744 Slewing Bearings — Flanged Light Series Gearless Four-Point Contact Ball Bearing

The VLU200744 Slewing Bearings belong to the INA VLU flanged light series — a gearless, single-row, four-point contact ball design with a 744 mm raceway diameter, 634 mm bore, 848 mm outside diameter, and 56 mm total height. Weighing 41.8 kg, the ring carries a static axial load of 530 kN and uses a double-lip NBR seal. It is manufactured by Luoyang Heng Guan Bearing Technology Co., Ltd. and is compatible with INA/Schaeffler VLU series interchangeability requirements.

What Is the VLU200744 Slewing Ring?

The VLU200744 is a gearless flanged outer-ring slewing ring from the INA Light Series 20. It is designed for applications where a compact, direct-bolt mounting solution is needed without a counterbore or locating ring.

The four-point contact ball geometry allows a single row of balls to carry axial, radial, and tilting moment loads simultaneously. This reduces component count compared to multi-row configurations in space-constrained assemblies.

The VLU200744 is a direct replacement for the Schaeffler VLU 744. Procurement engineers should verify cross-reference compatibility with other brands against their own manufacturer documentation before substitution.

Full Technical Specifications

Design Features

Gearless flanged outer ring. The bearing has no integrated gear teeth. Drive is applied via an external pinion, chain, belt, friction wheel, or motor through a gearbox. This keeps unit cost lower and sourcing simpler compared to geared slewing rings.

Flanged direct mounting. The 12 mm flange with T/t 12 mm centering lands bolts directly onto the mating structure. No counterbore or locating ring is required, which reduces machining on the host frame.

Light-series weight. At 41.8 kg, this ring is lighter than the standard-series VSU 744 (52.0 kg). In applications where total system weight is a design constraint — such as robotic arms or medical imaging gantries — this difference is worth accounting for in structural calculations.

Standard_VL clearance. Radial clearance of 0–0.5 mm and axial tilting clearance of 0–0.7 mm. This wider clearance is intended for free-running light pivots and reduces the risk of binding where minor structural misalignment exists.

Ring and ball materials. Rings are manufactured from 50Mn or 42CrMo4 (quenched and tempered); balls are GCr15. Raceways are induction-hardened to 55–62 HRC, maintaining surface wear resistance while keeping the core ductile for shock load absorption.

Typical Applications

The VLU200744 slewing bearings is suited for low-speed, light-load rotary systems across several industries:

· Solar trackers — the flanged ring mounts onto the tracker frame without a counterbore; the 744 mm raceway handles tilt-moment loads on mid-to-large tracker structures

· Filling and packaging machines — the flange mount suits washdown machine frames; Standard_VL clearance supports free-running rotation at low drive torque

· Food and beverage processing — bottle-line turntables and pasteurizer carousels benefit from the sealed NBR design and compatibility with food-grade grease

· Rotary indexing tables — assembly turntables and indexers using a side-mounted external drive when an under-table drive arrangement is not preferred

· Collaborative robots and automation — the flanged mount removes the need for a precision-machined seat in the robot base, reducing structural complexity

· Medical and laboratory equipment — imaging gantries and lab turntables requiring smooth, low-load rotation where a small external pinion fits tight enclosures

· Light material handling — carousel conveyors and pallet rotators operating at light loads and low speeds within the light-series load range

Quality Control

Each VLU200744 bearing produced at Heng Guan goes through an inspection process before shipment.

Testing equipment includes coordinate measuring machines, vibration testers, and life testing machines. Each batch is traceable from raw material through heat treatment, raceway grinding, assembly, and final inspection.

Ring steel chemistry and hardness are verified by material certificates. Raceway surface hardness is measured to confirm the induction-hardened zone meets the 55–62 HRC specification. Seal lip condition and grease fill are checked before packaging.

Products are manufactured in compliance with DIN, ISO, and GB standards. The facility holds ISO 9001 certification, and products are RoHS compliant for export to European and North American markets.

Ordering and Customization

· MOQ: 1 piece, suitable for replacement orders or prototype builds

· Lead time: Standard stock typically ships within 2–3 business days; custom order lead times are confirmed by the engineering team upon inquiry

· Precision options: P0, P6, or P5 available

· Custom scope: bolt patterns, ring material grade, seal type, surface treatment, clearance class, and non-standard dimensions

· OEM/ODM: available for machine builders and system integrators

· Support services: technical consultation, product selection, and installation guidance

Packaging and Shipping

Each bearing is individually wrapped with anti-rust paper and packed in a wooden case suitable for sea freight and air freight. Standard marks include model number, dimensions, batch number, and country of origin. Bulk orders are palletized and secured for container loading.

FAQ

Q: What is the VLU200744?

A: VLU200744 is a gearless flanged four-point contact ball slewing ring from the INA VLU Light Series 20. It has a 744 mm raceway diameter, 634 mm bore, 848 mm outside diameter, 56 mm height, and weighs 41.8 kg.

Q: What are the mounting dimensions of the VLU 744?

A: Bore 634 mm, outside diameter 848 mm, height 56 mm. The outer flange uses 12 × 18 mm through-holes on an 820 mm bolt circle; the inner ring uses 16 × 18 mm through-holes on a 662 mm bolt circle. Centering lands are 12 mm (T/t 12/12 mm).

Q: What is the load capacity of the VLU 744?

A: Dynamic axial Ca = 171 kN, static axial C0a = 530 kN; dynamic radial Cr = 155 kN, static radial C0r = 197 kN. The maximum radial load on the fixing screws is 93.6 kN.

Q: Is VLU200744 the same as VSU200744?

A: No. Both are gearless four-point contact rings on a 744 mm raceway, but they are different series. The VLU200744 is the flanged light series (C0a 530 kN, 41.8 kg), while the VSU200744 is the standard series with C0a 1,200 kN — approximately 2.26 times higher. Selection should be based on calculated duty loads for your application.

Q: How is a gearless slewing ring driven?

A: Through an external pinion, chain or belt drive, friction wheel, or motor via gearbox. The ring has no integral gear teeth. This external drive arrangement allows the ring itself to remain interchangeable and cost-effective.

Q: Can the VLU 744 operate in cold environments?

A: Yes. The standard operating range is −25 to +80 °C. For environments near the lower limit, confirm that the lubrication grease selected is rated for low-temperature operation to maintain adequate film thickness.

Contact Us

For quotes or technical inquiries about VLU200744 slewing bearings, email us at mia@hgbearings.com. Our engineering team responds within one business day.