Industry-Verified Manufacturing Data (2026)

Slewing Motor

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Slewing Motor used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Slewing Motor is characterized by the integration of Rotor and Stator. In industrial production environments, manufacturers listed on CNFX commonly emphasize Copper windings construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A motor that provides rotational motion for slewing mechanisms in machinery.

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Product Specifications

Technical details and manufacturing context for Slewing Motor

Definition
A slewing motor is a specialized electric or hydraulic motor designed to drive the slewing (rotational) motion of equipment such as cranes, excavators, and turntables. As part of the slewing unit, it converts electrical or hydraulic energy into controlled torque to rotate the superstructure or boom around a vertical axis.
Working Principle
The motor receives power (electrical or hydraulic) and generates rotational force through electromagnetic induction or hydraulic pressure acting on pistons/vanes. This torque is transmitted via a gearbox or directly to the slewing ring/bearing, enabling precise 360-degree rotation with controlled speed and positioning.
Common Materials
Copper windings, Steel laminations, Aluminum housing
Technical Parameters
  • Rated torque output capacity (Nm) Per Request
Components / BOM
  • Rotor
    Rotating component that generates torque through electromagnetic or hydraulic action
    Material: Electrical steel laminations
  • Stator
    Stationary component that creates magnetic field or houses hydraulic chambers
    Material: Copper windings in steel core
  • Housing
    Protects internal components and provides mounting structure
    Material: Cast aluminum or steel
Engineering Reasoning
0.5-15 N·m continuous torque at 100-3000 rpm, 24-48 VDC input, -20°C to +85°C ambient
Torque exceeding 22 N·m for >5 seconds, winding temperature >155°C, radial load >500 N at shaft end
Design Rationale: Permanent magnet demagnetization at Curie temperature of 310°C for NdFeB magnets, bearing Brinell fatigue at >1.8 GPa contact stress
Risk Mitigation (FMEA)
Trigger Brush arcing at >3.5 A/mm² current density during commutation
Mode: Commutator carbonization increasing contact resistance to >0.5 Ω
Strategy: Silver-graphite brush material with 2.5 A/mm² rating and 0.15 Ω contact resistance specification
Trigger Radial misalignment >0.05 mm between motor shaft and gearbox input
Mode: Bearing inner race fretting wear generating >15 μm clearance
Strategy: Flexible coupling with 0.02 mm parallel misalignment tolerance and 0.5° angular compensation

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Slewing Motor.

Swing Motor Rotation Motor industrial slewing motor for heavy machinery high torque rotational motion motor copper winding slewing motor components steel lamination motor for equipment manufacturing aluminum housing slewing motor specifications

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Slewing Unit
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 250 bar
flow rate: 5-100 L/min
temperature: -20°C to +80°C
slurry concentration: Up to 5% solids by weight
Media Compatibility
✓ Hydraulic oil (ISO VG 32-68) ✓ Water-glycol fluids ✓ Synthetic ester-based fluids
Unsuitable: High-concentration abrasive slurries (>5% solids)
Sizing Data Required
  • Required torque (Nm)
  • Operating speed (rpm)
  • System pressure (bar)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing fatigue and overheating
Cause: Inadequate lubrication, contamination ingress, or excessive axial/radial loads leading to premature bearing wear and thermal degradation.
Winding insulation breakdown
Cause: Thermal cycling, moisture ingress, or voltage spikes causing insulation deterioration, leading to short circuits or ground faults.
Maintenance Indicators
  • Unusual grinding or rumbling noises during operation, indicating bearing wear or misalignment.
  • Excessive vibration or irregular motor movement, suggesting mechanical imbalance or mounting issues.
Engineering Tips
  • Implement a condition-based lubrication program using high-temperature grease and monitor bearing temperatures to prevent under/over-lubrication.
  • Install vibration analysis sensors and perform regular thermographic inspections to detect early-stage mechanical and electrical faults.

Compliance & Manufacturing Standards

Reference Standards
ISO 4401:2005 (Hydraulic fluid power - Four-port directional control valves - Mounting surfaces) ANSI/B93.5M-1995 (Hydraulic Fluid Power - Cylinders - Bore and Rod Area DIN 24342 (Hydraulic fluid power - Cylinders - Dimensions and mounting dimensions)
Manufacturing Precision
  • Bore diameter: +/-0.02mm
  • Mounting surface flatness: 0.05mm
Quality Inspection
  • Pressure testing for hydraulic integrity
  • Dimensional verification with CMM (Coordinate Measuring Machine)

Factories Producing Slewing Motor

Verified manufacturers with capability to produce this product in China

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✓ 95% Supplier Capability Match Found

S Sourcing Manager from Brazil Jan 28, 2026
★★★★★
"Testing the Slewing Motor now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Procurement Specialist from Canada Jan 25, 2026
★★★★☆
"Impressive build quality. Especially the technical reliability is very stable during long-term operation. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from United States Jan 22, 2026
★★★★★
"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Slewing Motor meets all ISO standards."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

11 sourcing managers are analyzing this specification now. Last inquiry for Slewing Motor from Germany (40m ago).

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Frequently Asked Questions

What are the main applications of a slewing motor in machinery manufacturing?

Slewing motors are essential for rotational motion in cranes, excavators, turntables, and other industrial equipment requiring precise 360-degree movement.

How do copper windings and steel laminations improve motor performance?

Copper windings provide efficient electrical conductivity for optimal torque, while steel laminations reduce energy loss through eddy currents, enhancing durability and efficiency.

What maintenance is required for aluminum housing slewing motors?

Regular inspection for corrosion, cleaning of ventilation paths, and lubrication of bearings are recommended to ensure longevity in industrial environments.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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