VLI200644-N Slewing Bearings

VLI200644-N Slewing Bearings — INA/Schaeffler Compatible Flanged Light Series Internal Gear Slewing Ring

VLI200644-N Slewing Bearings belong to the INA/Schaeffler VLI Light Series 20 — a flanged, internal-gear, four-point contact ball slewing ring built for light-duty rotary applications. The ring carries a 644 mm raceway diameter, 546 mm bore, 748 mm outside diameter, 56 mm height, and weighs 45.1 kg. The internal gear (m6 / z93) is positioned inside the bore, enabling a compact under-table drive layout. Luoyang Heng Guan Bearing Technology Co., Ltd. manufactures and supplies this model in P0, P6, and P5 precision grades.

What Is the VLI200644-N Internal Gear Four-Point Contact Ball Bearing?

The VLI 200 644-N belongs to the INA/Schaeffler VLI Light Series 20 — a flanged internal-gear slewing ring designed for light-duty rotary applications. It is also written as VLI20 0644-N or VLI 20 644 N; all refer to the same model.

The internal gear (m6 / z93) sits inside the bore on the outer ring, allowing a central pinion below the table to drive the ring from underneath. This under-table drive configuration keeps the gear teeth protected from contamination, making it suitable for food-grade, washdown, and outdoor environments.

The single-row four-point contact ball design allows one row of balls to carry axial loads, radial loads, and tilting moments simultaneously. This simplifies machine structure without requiring multiple bearing rows.

Key Technical Specifications

Product Characteristics

Four-point contact ball geometry lets a single row carry combined axial, radial, and tilting moment loads, resulting in a more compact assembly compared with multi-row configurations.

Internal gear m6/z93 is positioned inside the bore. The teeth are shielded from splash and dust by the bore wall geometry, which is an advantage in food processing lines and washdown environments.

Flanged mounting with 12 mm flange height and T/t 12 mm centering lands connects directly to the supporting structure. No separate locating ring is required, which reduces mounting complexity.

Light-series weight — at 45.1 kg for a 644 mm raceway ring, this model is lighter than the standard-series VSI 200 644-N. The static axial load capacity C0a of 455 kN is intended for light-duty applications; users should verify suitability against their actual load requirements.

Standard_VL clearance (radial 0–0.5 mm / axial tilting 0–0.7 mm) supports free-running, low-torque pivoting in turntable and automation applications.

Double-lip NBR seals retain grease and help exclude contaminants under normal operating conditions.

Typical Application Areas

Filling and Packaging Machines are a primary application area. Rotary fillers, cappers, and packaging carousels operate at moderate loads with continuous slow rotation, often in washdown environments. The 644 mm raceway diameter and flanged mount are compatible with mid-capacity filling turntable frames.

Rotary Indexing Tables and Light Turntables for assembly, palletizing, and pallet rotation can use the 12-hole outer flange bolt pattern that is common in standard turntable frame designs.

Collaborative Robots and AGV Rotators operate at low loads and speeds. The flanged design reduces the need for a precision-machined seat in the base structure.

Medical and Laboratory Equipment — including imaging turntables and positioning platforms — require smooth, low-load rotation with controlled clearance. Standard_VL clearance suits free-running requirements in these applications.

Small Solar Trackers in light-duty single-axis arrays use flanged rings with linear actuators. The −25 to +80 °C operating range covers most standard PV installation climates.

Smaller Circular Clarifiers and Sludge Scraper Bridges at the 644 mm scale use light-series flanged rings for continuous slow rotation in wastewater treatment installations.

Materials and Quality

The ring body is manufactured from 50Mn or 42CrMo4 alloy steel. GCr15 bearing steel is used for the rolling elements.

Every bearing goes through dimensional inspection and functional testing before shipment. Full material and process traceability is maintained from raw steel to finished product. Products are manufactured under an ISO 9001 certified quality management system and are RoHS compliant.

Interchangeability and Cross-Reference

The VLI200644-N Slewing Bearings is designed as a dimensionally interchangeable replacement for the Schaeffler / INA VLI 200 644-N mounting standard. Cross-references include:

· SKF RKS.22 0641

· INA VLI variants: -RL0, -RL1

Cross-reference compatibility should be confirmed against your specific application drawings before ordering. Contact Us for engineering confirmation. All brand names are referenced for compatibility identification only; Heng Guan Bearing is an independent manufacturer and is not affiliated with the brands listed above.

Supply and Customization Options

Heng Guan Bearing accepts single-piece orders, which supports replacement sourcing and machine trials. Bulk shipments are supported for production line procurement.

FAQ

Q: What exactly is the VLI200644-N?

A: The VLI 200 644-N is a flanged internal-gear four-point contact ball slewing ring from the INA VLI Light Series 20. It has a 644 mm raceway diameter, 546 mm bore, 748 mm outside diameter, and 56 mm height. It weighs 45.1 kg and carries an internal gear m6/z93 inside the bore.

Q: What are the gear specifications?

A: The internal gear is on the outer ring inside the bore: module m6, tooth count z93. The bearing uses Standard_VL clearance — radial 0–0.5 mm and axial tilting 0–0.7 mm — with double-lip NBR seals to protect the gear teeth.

Q: What is the load capacity?

A: Dynamic axial load Ca = 162 kN, static axial load C0a = 455 kN. Dynamic radial Cr = 147 kN, static radial C0r = 171 kN. The static axial capacity is approximately 2.3× lower than the standard-series VSI 200 644-N (C0a 1,040 kN). Always select based on actual duty loads.

Q: Is the VLI 200 644-N the same as the VSI 200 644-N?

A: No. Both are internal-gear four-point contact rings on a 644 mm raceway, but they are different series. The VLI is the flanged light series (546 mm bore, 748 mm OD, 45.1 kg, C0a 455 kN). The VSI is the standard series with approximately 2.3× higher static axial capacity. Selection should be based on your actual duty load.

Q: How is an internal-gear slewing ring driven?

A: A central pinion below the table meshes with the internal gear teeth inside the bore — this is the under-table drive configuration. The internal teeth are less exposed to contamination than external-gear designs, which is relevant in washdown and food-grade environments.

Contact Us

For quotes or technical questions about VLI200644-N Slewing Bearings, email us at mia@hgbearings.com.