RKS.23.1091 Slewing Bearings
• Largest light-series RKS.23 — the only model that bridges the Light family to larger Medium 060 / 060.30.1904 territory while staying in the 23-series bolt-circle system.
• INA numbering deviation note — the Schaeffler medias path for the same engineering footprint is VLU201094 (not VLU201091); the part-number tail differs by 3 mm but the dimensions match — sample-book authority wins the trust argument.
- Product Description
RKS.23.1091 Slewing Bearings — Ungeared Four Point Contact Ball Slewing Ring for Large Direct-Drive Applications
Luoyang Heng Guan Bearing Technology Co., Ltd. is your trusted source for the RKS.23.1091 Slewing Bearings — the largest model in the SKF RKS.23 light series. With a 1198 mm outside diameter, 984 mm bore, 56 mm height, and 62 kg weight, this ungeared single-row four-point contact ball slewing ring delivers a static load rating of C0 = 766 kN — the highest in the entire RKS.23 family. Backed by 30+ years of experience, ISO9001 certification, and exports to 50+ countries, Heng Guan offers factory-direct pricing, stock delivery in 3–7 days, and full customization support.
Full Technical Specifications of RKS.23 1091 Slewing Ring
Here are the complete dimensional and performance parameters you need for selection and installation:
Parameter | Value |
Model | RKS.23.1091 (also: RKS.231091 / 23.1091) |
Mean Raceway Diameter (dm) | 1091 mm |
Outside Diameter (D) | 1198 mm (47.17 in) |
Centring Diameter Outer (D1 / D2) | 1134 mm / 1092.5 mm |
Bore Diameter (d) | 984 mm (38.74 in) |
Centring Diameter Inner (d1 / d2) | 1048 mm / 1089.5 mm |
Total Height (H) | 56 mm (2.20 in), tolerance ±1 mm |
Weight | 62 kg |
Gear Type | Without gear (no M12 threads) |
Outer-Ring Bolt Circle (Je) | 1170 mm — 16 × 18 mm through holes |
Inner-Ring Bolt Circle (Ji) | 1012 mm — 20 × 18 mm through holes |
Ball Diameter | 20 mm (four-point contact) |
Dynamic Load Rating (C) | 244 kN |
Static Load Rating (C0) | 766 kN |
Ring Material | C45E / 42CrMo4 / 50Mn |
Raceway Hardness | HRC 55–62 (induction hardened) |
Seal | NBR one-piece, –40 ~ +110 °C |
Lubrication | NLGI 2 lithium EP grease; 4 × AM8 × 1 grease nipples |
Max Speed | ≤ 1.5 m/s continuous / 2 m/s short-term |
Running Accuracy | Radial ≤ 0.2 mm / Axial ≤ 0.3 mm |
Key Product Advantages You Should Know
The RKS.23.1091 Slewing Bearings is the only model in the light series that bridges the gap between the RKS.23 Light family and larger Medium-series bearings — giving you maximum capacity in a compact, lightweight package.
Its C0 of 766 kN is 15% higher than the RKS.23.0941's 664 kN. That means more margin for combined axial, radial, and tilting moment loads without stepping up to a heavier series.
Both the outer and inner rings feature 18 mm through holes — no M12 threads. This makes it a pure direct-drive design, ideal for pairing with hydraulic or servo motors.
The induction-hardened raceways (HRC 55–62) and 42CrMo4 / 50Mn ring material give you excellent wear resistance and long service life, even in demanding cycles.
Cross Reference & Interchange Guide
If you're sourcing a replacement or running a cross-reference check, these part numbers are confirmed interchangeable with the SKF RKS.23.1091:
Brand | Cross Reference Number |
SKF | RKS.23.1091 |
INA / Schaeffler | VLU201094 (note: tail 1094, not 1091) |
Kaydon | RK6-43P1Z |
Rothe Erde | NBL.20.1094.200-1PPN |
Rollix | 23-1091-01 (inferred) |
Need a geared version instead? The RKS.21.1091 (external gear) and RKS.22.1091 (internal gear) share the same bolt-circle system and dimensional footprint.
Where Is RKS.23 1091 Typically Used?
This large ungeared slewing ring is built for direct-drive rotation in heavy-duty, low-speed applications. You'll find it performing reliably in:
· Palletizing robots & logistics automation — smooth, precise rotation for high-cycle industrial arms
· Solar trackers — continuous low-speed azimuth tracking under outdoor conditions
· Large filling & packaging lines — stable turntable rotation with high positional accuracy
· Radar & antenna systems — vibration-free rotation with tight running accuracy
· Wind turbine yaw systems — sustained load-bearing rotation in variable wind conditions
· Medical precision turntables — low-noise, stick-slip-free movement for sensitive equipment
The 62 kg weight makes it ocean-freight friendly, and single-unit air freight is available on request.
Why Choose Heng Guan Bearing?
We manufacture slewing bearings from 50 mm up to 10,000 mm diameter, with precision grades P0, P6, P5, and P4. Our facility runs CNC vertical lathes, CNC gear shapers, grinding machines, and large gear hobbing machines — all under ISO9001 quality control.
Every bearing goes through coordinate measuring machines, vibration testers, and life testing before it leaves our factory. From raw material to finished product, every step is fully traceable.
We support OEM/ODM partnerships, custom flange configurations, and personalized non-standard machining. Our engineering team provides selection guidance, installation support, and after-sales service — so you're never left without help.
Packaging & Shipping
Each bearing is packed in an anti-rust film with wooden case or pallet protection, suitable for long-distance ocean and air freight. The 62 kg unit weight keeps shipping costs manageable for single-piece or bulk orders.
FAQ
Q: What is RKS.23.1091?
A: It is the largest model in the SKF RKS.23 light series — a single-row, four-point contact ball slewing bearing without gear. Key dimensions: OD 1198 mm, bore 984 mm, height 56 mm, weight 62 kg.
Q: What are the dimensions of RKS.23.1091?
A: Outside diameter 1198 mm, bore 984 mm, height 56 mm, mean raceway diameter 1091 mm. Bolt circles: 1170 mm outer (16 × 18 mm holes) and 1012 mm inner (20 × 18 mm holes).
Q: Is RKS.23.1091 equivalent to INA VLU201094?
A: Yes. INA VLU201094, Kaydon RK6-43P1Z, and Rothe Erde NBL.20.1094.200-1PPN are all confirmed interchangeable. Note the INA tail number reads 1094, not 1091 — but dimensions match.
Q: What is the load capacity of RKS.23.1091?
A: Dynamic rating C = 244 kN, static rating C0 = 766 kN — the highest in the RKS.23 family. It handles combined axial, radial, and tilting moment loads.
Q: Is RKS.23.1091 in stock?
A: Yes. Stock units ship in 3–7 days. Non-stock standard models ship in 25–30 days. MOQ is 1 pc. Contact Us for current availability and pricing.
Contact Us
Ready to order or need a datasheet with RKS.23.1091 Slewing Bearings? Email us at mia@hgb-bearing.com — our team responds within 24 hours.
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