Luffing Jib Crane
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This page explains how Slewing Ring is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A large-diameter bearing that enables rotational movement between the crane's upper structure (slewing platform) and the fixed base or undercarriage.
Technical details and manufacturing context for Slewing Ring
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Dynamic Load | 100–500 kN | Based on L10 life calculationISO 281 |
| Rated Static Load | 200–1000 kN | Maximum load without permanent deformationISO 76 |
| Tilting Moment Capacity | 50–300 kN·m | Critical for crane stability |
| Rotational Speed | 0.5–5 r/min | Maximum continuous speed |
| Axial Runout | 0.05–0.15 mm | Measured at reference diameterISO 1101 |
| Radial Runout | 0.05–0.2 mm | Measured at racewayISO 1101 |
| Operating Temperature | -40–85 °C | Lubricant limits apply |
| Degree of Protection | IP54–IP65 | Higher IP for dusty environmentsIEC 60529 |
| Gear Hardness | 55–62 HRC | For gear teeth if applicableISO 6336 |
| Raceway Hardness | 58–62 HRC | Ensures wear resistanceISO 6336 |
| Weight | 100–5000 kg | Depends on size and type |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Slewing Ring.
This component is essential for the following industrial systems and equipment:
| pressure: | Dynamic load capacity: 50 kN to 50,000 kN, Static load capacity: 100 kN to 100,000 kN |
| other spec: | Rotational speed: 0.1 to 10 RPM (typical), Sealing: IP65/IP67 standard, Lubrication: Grease or oil bath |
| temperature: | -40°C to +80°C (standard), -60°C to +120°C (specialized) |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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Slewing rings are typically made from alloy steel such as 42CrMo or 50Mn, or case-hardened steel. These materials provide the necessary strength and wear resistance for heavy-duty applications.
Rated dynamic load ranges from 100 to 500 kN (based on L10 life per ISO 281), and rated static load from 200 to 1000 kN (per ISO 76). Tilting moment capacity is 50–300 kN·m. These values are reference ranges and must be confirmed for the specific model.
The slewing ring is driven by hydraulic or electric motors that engage with a gear ring (internal or external) on the ring. This applies torque to rotate the outer ring and attached superstructure relative to the fixed inner ring.
Regular inspection of raceways, seals, and gear teeth is necessary. Watch for increased noise, vibration, or play, which may indicate wear or lubrication issues. Follow manufacturer guidelines for lubrication and replacement intervals.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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