VLU200544 Slewing Bearings

VLU200544 Slewing Bearings — Flanged Light Series Four-Point Contact Ball Bearing

VLU200544 Slewing Bearings are gearless, flanged four-point contact ball slewing rings from the INA VLU light series 20. Built on a 544 mm raceway diameter, this bearing measures 434 mm bore, 648 mm OD, and 56 mm in height, weighing 31.4 kg. The flanged outer ring bolts directly onto the machine structure, eliminating counterbores and locating rings. With a static axial load capacity of 385 kN, it suits light-duty rotary systems where weight and compact installation matter.

What Is the VLU200544 Slewing Ring?

The VLU200544 belongs to the flanged light series 20 of the INA/Schaeffler VLU range. It carries axial, radial, and tilting moment loads through a single row of four-point contact balls, keeping the overall envelope compact without stacking multiple bearing rows.

The flanged outer ring design means the ring sits flat against the mounting face and is secured by through-bolts on a 620 mm bolt circle — no counterbore machining required. The 12 mm flange height and 12/12 mm centering lands (T/t) provide consistent alignment reference during assembly. This configuration makes the VLU200544 a widely used replacement for Schaeffler VLU 544 and equivalent light-series models.

Because the ring carries no gear teeth, the drive arrangement is left to the system designer: external pinion, chain, belt, friction wheel, or motor via gearbox all work. This flexibility keeps unit cost lower than geared variants and gives engineers more layout options.

Technical Specifications

Key Design Features

Four-point contact ball construction allows one ball row to carry axial, radial, and tilting moment loads simultaneously. This removes the need for a matched bearing pair or stacked arrangement, reducing both axial stack height and assembly complexity.

The flanged outer ring sits flush on the machine face and locates through the 12 mm centering lands. Mounting requires only through-bolts — no counterbore, no retaining ring, no additional locating hardware. This is practical for structures where machining depth is limited or where fast field replacement matters.

At 31.4 kg, the VLU200544 is lighter than standard-series alternatives on the same 544 mm raceway. For rotating equipment where overall frame mass is a design constraint, this difference can influence motor sizing, counterweight requirements, and structural loading.

Standard_VL clearance — radial 0–0.5 mm, axial tilting 0–0.7 mm — is intentionally wider than heavy-duty preloaded rings. This clearance band suits free-running pivots and low-speed continuous rotation where tight preload would increase drag without improving accuracy.

Rings are manufactured from 50Mn or 42CrMo4 alloy steel with induction-hardened raceways at 55–62 HRC for wear resistance. The ductile unhardened core resists shock loading. Double-lip NBR seals retain grease and limit external contamination entry under normal operating conditions.

Typical Application Areas

The products are sized for light-duty, low-speed rotary systems. Typical installations include:

· Solar trackers: The 544 mm raceway fits mid-size single-axis tracker frames; the flanged ring drops onto the structure without a counterbore.

· Filling and packaging machines: Rotary fillers and capping carousels use a side-mounted pinion; Standard_VL clearance keeps rotation smooth and free-running.

· Rotary indexing tables: Assembly turntables and light indexers with external pinion drives mount cleanly on the flanged outer ring.

· Collaborative robots: The flange removes the need for a machined seat in the robot base, reducing assembly steps.

· Medical and laboratory equipment: Imaging gantries and lab turntables that require quiet, low-load rotation.

· Light material handling: Carousel conveyors and pallet rotators operating within the light-series load band.

Material and Quality Control

VLU200544 rings are produced from 50Mn or 42CrMo4 alloy steel. Rolling elements use GCr15 bearing steel. Raceway surfaces are induction-hardened to 55–62 HRC. Every unit is inspected on coordinate measuring machines and vibration testers, with full traceability maintained from raw material to finished product. Products comply with DIN, ISO, and GB standards and are RoHS compliant.

Supply and Customization

VLU200544 Slewing Bearings are available from a minimum of 1 piece. Standard stock is held for prompt shipment, with volume order support available.

Customization options include:

· Bolt pattern configuration

· Ring material grade (50Mn or 42CrMo4)

· Seal type

· Surface treatment

· Precision class (P0, P6, or P5)

· Clearance specification

OEM and ODM partnerships are supported. Heng Guan also handles old product mapping and non-standard machined components including large gears, Shafts, and ring gears. Engineering confirmation is available within 24 hours of inquiry.

Packaging

Units are packed in anti-rust film with wooden pallet crating for export. Each package is labeled with model number, dimensions, and batch number for traceability during shipping.

FAQ

Q: What is the difference between VLU200544 and VSU200544?

A: Both are gearless four-point contact rings on a 544 mm raceway. The VLU200544 is the flanged light series: 434 mm bore, 648 mm OD, 31.4 kg, C0a 385 kN. The VSU200544 is the standard (non-flanged) series with different dimensions and a higher static axial load rating. Select based on mounting configuration and actual duty cycle requirements.

Q: How is a gearless slewing ring driven?

A: The ring carries no gear teeth. Drive options include external pinion, chain or belt drive, friction wheel, or motor via gearbox. The choice of drive method is determined by the system layout and torque requirements.

Q: What bolt pattern does the VLU200544 use?

A: The outer flange uses 10 × 18 mm through-holes on a 620 mm bolt circle. The inner ring uses 14 × 18 mm through-holes on a 462 mm bolt circle. Centering lands are 12 mm on both sides.

Q: What precision classes are available?

A: P0, P6, and P5 are available. The appropriate class depends on the rotational accuracy and runout requirements of the application.

Contact Us

For quotes or technical questions about VLU200544 Slewing Bearings, email us at sales@hgbearings.com.