Industry-Verified Manufacturing Data (2026)

Flywheel

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Flywheel 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 Flywheel is characterized by the integration of Flywheel hub and Flywheel rim. In industrial production environments, manufacturers listed on CNFX commonly emphasize Cast iron construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A rotating mechanical device that stores rotational energy to maintain consistent motion and momentum in machinery.

Product Specifications

Technical details and manufacturing context for Flywheel

Definition
In a jaw crusher, the flywheel is a heavy wheel attached to the eccentric shaft that stores kinetic energy during the non-crushing phase and releases it during the crushing stroke, ensuring smooth operation, reducing power fluctuations, and maintaining consistent crushing force.
Working Principle
The flywheel rotates with the eccentric shaft driven by the motor. During the return stroke of the jaw (when material is not being crushed), the motor accelerates the flywheel, storing kinetic energy. During the crushing stroke, the flywheel releases this stored energy to assist the motor in overcoming the high resistance of crushing hard materials, ensuring continuous and efficient operation.
Common Materials
Cast iron, Cast steel, Forged steel
Technical Parameters
  • Diameter of the flywheel (mm) Per Request
Components / BOM
  • Flywheel hub
    Central mounting component that connects the flywheel to the eccentric shaft
    Material: steel
  • Flywheel rim
    Outer heavy section that provides the majority of the mass for energy storage
    Material: cast iron or steel
  • Keyway
    Slot for the key that prevents rotational slippage between flywheel and shaft
    Material: steel
  • Bolt holes
    Holes for securing the flywheel to the hub or shaft flange
    Material: steel
Engineering Reasoning
1000-15000 RPM
Tensile stress exceeding 800 MPa at 16000 RPM
Design Rationale: Centrifugal stress exceeding material yield strength due to rotational inertia
Risk Mitigation (FMEA)
Trigger Bearing lubrication degradation below 0.1 mm oil film thickness
Mode: Rotational imbalance exceeding 0.05 mm displacement
Strategy: Hydrodynamic bearing design with 0.15 mm minimum oil film thickness
Trigger Material fatigue crack propagation at 10^7 stress cycles
Mode: Flywheel fracture at 12000 RPM
Strategy: Forged steel construction with 1000 MPa ultimate tensile strength

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Flywheel.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar (typical for sealed housings, vacuum possible for high-speed variants)
other spec: Max rotational speed: 10,000-100,000 RPM (depends on material and design), Energy storage capacity: 0.1-100 kWh (application dependent)
temperature: -40°C to 150°C (operating range, varies by bearing type and lubrication)
Media Compatibility
✓ Industrial air/gas systems ✓ Clean lubricating oils ✓ Dry inert atmospheres (e.g., nitrogen)
Unsuitable: Abrasive slurry or particulate-laden environments (causes bearing wear and imbalance)
Sizing Data Required
  • Required energy storage (kWh or MJ)
  • Maximum rotational speed (RPM)
  • Peak power output (kW)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic stress from rotational forces exceeding material endurance limit, often due to overspeed events, improper balancing, or manufacturing defects like inclusions in the material.
Bearing seizure or wear
Cause: Lubrication failure (contamination, degradation, or insufficient quantity), misalignment, excessive loading, or improper bearing fit leading to increased friction and heat generation.
Maintenance Indicators
  • Excessive vibration or unusual audible harmonics during operation, indicating imbalance, bearing issues, or cracks.
  • Visible cracks, surface pitting, or discoloration (blueing from overheating) on the flywheel surface or hub area.
Engineering Tips
  • Implement regular dynamic balancing and alignment checks during scheduled maintenance to prevent imbalance-induced stresses and ensure smooth operation.
  • Establish a rigorous lubrication management program with clean, appropriate lubricants, and monitor bearing temperatures and vibration trends to detect early degradation.

Compliance & Manufacturing Standards

Reference Standards
ISO 1940-1:2003 - Mechanical vibration - Balance quality requirements for rotors in a constant (rigid) state ANSI/AGMA 2000-A88 - Gear Classification and Inspection Handbook (for flywheels with gear teeth) DIN 740-1:2016 - Flywheels for internal combustion engines - Dimensions
Manufacturing Precision
  • Bore diameter: +/-0.025 mm
  • Radial runout: 0.05 mm maximum
Quality Inspection
  • Dynamic balancing test (per ISO 1940-1)
  • Ultrasonic testing for internal defects

Factories Producing Flywheel

Verified manufacturers with capability to produce this product in China

✓ 98% Supplier Capability Match Found

S Sourcing Manager from Singapore Feb 09, 2026
★★★★★
"Testing the Flywheel now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Procurement Specialist from Germany Feb 06, 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 Brazil Feb 03, 2026
★★★★★
"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Flywheel 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.”

16 sourcing managers are analyzing this specification now. Last inquiry for Flywheel from Poland (31m ago).

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Frequently Asked Questions

What are the main differences between cast iron, cast steel, and forged steel flywheels?

Cast iron flywheels offer good vibration damping and cost-effectiveness for standard applications. Cast steel provides higher strength and impact resistance. Forged steel delivers superior durability, fatigue resistance, and performance for high-stress, heavy-duty machinery.

How does a flywheel maintain consistent motion in machinery?

A flywheel stores rotational kinetic energy during periods of excess power and releases it during power dips, smoothing out speed fluctuations. This inertia helps maintain consistent momentum, reduce vibrations, and improve efficiency in engines, presses, and other rotating equipment.

What should I consider when specifying bolt holes and keyway dimensions on a flywheel?

Bolt hole patterns must match your shaft coupling specifications for secure mounting, considering torque loads and safety factors. Keyway dimensions (width, depth, length) must correspond precisely to the shaft key to prevent slippage and ensure reliable power transmission. Always consult engineering standards.

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.

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