RKS.22.0641 Slewing Bearings

RKS.22.0641 Slewing Bearings — Internal Gear Four Point Contact Ball Bearing for Center-Drive Applications

Luoyang Heng Guan Bearing Technology Co., Ltd. is your trusted source for the RKS.22.0641 Slewing Bearings — a light-series single-row four-point contact ball slewing ring with internal gear. With 748 mm OD, 546 mm bore, 56 mm height, and just 48 kg, this SKF RKS.22-series turntable bearing delivers C 200 kN dynamic and C0 440 kN static axial load capacity. Backed by 20+ years of experience, ISO9001 certification, and exports to 50+ countries, Heng Guan provides factory-direct pricing, MOQ 1 pc, and stock delivery in 3–7 days.

Full Technical Specifications of RKS.22 0641 Internal Gear Slewing Ring

All dimensions below are verified against the SKF RKS.22 light series catalogue.

RKS.22.0641 Cross Reference & Interchange Guide

Need a direct replacement or equivalent? Here's your quick cross-reference table.

If you're sourcing a VLI200644N equivalent or a VLI200644 replacement, our engineering team can confirm fitment before your order. Just send your drawing or part number.

Why Choose Heng Guan for Your RKS.22 0641 Internal Gear Slewing Bearing?

You get more than just a bearing — you get a complete solution backed by real engineering support.

Full Gear Parameters Published. We openly share module 6, 93 teeth, pressure angle 20°, profile shift X=0, and precision classes P0/P6/P5. No guessing. No surprises when the part arrives.

Higher Tooth Force Than External-Gear Version. The internal gear design delivers 16 kN normal / 65 kN max tooth force — stronger than the RKS.22.0641 Slewing Bearings external-gear version of the same size.

Lightweight Center-Drive Design. At only 48 kg with an outer ring flange, the L-shape internal gear layout keeps your machine compact while enabling smooth center-drive rotation.

Factory-Direct Pricing. We produce 300 pcs/month with full CNC capability — including vertical lathes, CNC gear shapers, and grinding machines. You buy direct from the source.

Stock Available. Fast Shipping. Standard models ship in 3–7 days. Non-stock standard models take 25–30 days. MOQ is just 1 pc — perfect for trial orders or urgent replacements.

Typical Application Scenarios for the 748×546×56 mm Internal Gear Turntable Bearing

This bearing was designed for demanding center-drive rotation tasks. Here's where it performs best:

Rotary Working Tables. Precision machining centers rely on this four-point contact ball slewing ring for stable, low-runout indexing. Axial accuracy ≤ 0.3 mm keeps your workpiece on-target.

Excavator Swing Mechanisms. The 42CrMo4 ring material and HRC 55–62 raceway hardness handle the shock and debris found on construction sites. Internal gear teeth mesh cleanly with the center-drive pinion.

Tower Crane Center Drives. The C0 440 kN static rating supports heavy tilting moments during crane slewing operations.

Bending Robots & Gantry Robots. Lightweight at 48 kg, this bearing keeps robot arm inertia low while maintaining precision positioning for industrial automation.

Solar Trackers & Wind Turbine Pitch Systems. The −40 to +110 °C NBR seal and NLGI 2 EP grease suit outdoor environments. The internal gear teeth enable direct low-speed drive without intermediate gearboxes.

Radar & Marine Equipment. Low running noise and ≤ 0.2 mm radial accuracy support smooth antenna rotation. The integral seal protects against moisture ingress in coastal environments.

Packaging & Delivery

Each bearing is packed in moisture-proof paper, foam padding, and a sturdy wooden case — safe for international sea or air freight. Standard stock ships in 3–7 days. Custom or non-stock standard models ship in 25–30 days. HS code: 8482109000.

FAQ

Q: What's the difference between single-row ball, double-row ball, cross roller, and triple-row roller slewing bearings?

A: ① Single-row four-point contact ball (like this RKS.22.0641): compact, cost-effective, ideal for light to medium loads. ② Double-row ball: higher load capacity than single-row, suited for heavier applications. ③ Cross roller: line contact gives 2–3× the stiffness of four-point contact — great for robots, machine tools, and radar. ④ Triple-row roller: maximum load capacity for heavy port cranes and large excavators. Always match to your actual load — don't over-spec or under-spec.

Q: When should I upgrade from a single-row ball bearing to a double-row ball bearing?

A: Upgrade when your axial force or tilting moment exceeds the economic range of the single-row design. If the selection calculation shows you'd need a single-row bearing 1.5× larger to meet your load, a double-row bearing at a slightly larger size is usually more cost-effective. Always base the decision on real load data, not guesswork.

Q: How do I know when the grease needs replacing?

A: Check the expelled grease. Dark/blackened color, gritty texture (metal particles), milky white emulsification (water ingress), or hardened paste consistency all signal that the grease has failed or is contaminated. Metal particles in the grease are a direct warning of raceway or rolling element wear — investigate further before continuing operation.

Q: What causes the slewing ring to stick or become hard to rotate?

A: Common causes: ① grease viscosity too high in cold temperatures or aged grease; ② foreign objects in the gear mesh (metal chips, weld spatter, stones); ③ mounting surface distortion causing raceway misalignment; ④ swollen aging seals; ⑤ severe raceway or rolling element damage. Start by ruling out contamination and lubrication issues, then check your mounting, then disassemble for inspection. Never force the bearing to rotate — it worsens the damage.

Q: Can you supply a matching pinion gear with this internal gear slewing bearing?

A: Yes. We can manufacture matching pinions to your drawing. The pinion must match on module, pressure angle, profile shift coefficient, tooth width, and center distance. Sourcing both from us means one point of contact for dimensional accountability — no finger-pointing between suppliers.

Q: How can I spot a refurbished or counterfeit bearing?

A: Watch for these red flags: ① shallow or blurry stamps that wipe off with solvent (genuine stamps are deep-pressed before heat treatment); ② inconsistent packaging fonts or colors; ③ no material certificate, no test report, no traceability; ④ vague answers when you ask about hardness, tolerance, or material grade; ⑤ price well below a realistic market range. Genuine parts have deep clear stamps, full documentation, and suppliers who are happy to discuss technical details.

Contact Us

Ready to order or need a technical consultation with RKS.22.0641 Slewing Bearings? Email us at mia@hgb-bearing.com — MOQ 1 pc, factory-direct price, fast response guaranteed.