Flywheel rim: Outer Diameter 300-2000 mm, Width 50-300 mm

Component Specifications

Definition

The flywheel rim is a critical rotating component in mechanical systems designed to store kinetic energy through angular momentum. It consists of a heavy circular band mounted on a central hub, with its mass concentrated at the maximum radius to maximize moment of inertia. This component smooths out torque fluctuations, reduces speed variations, and provides energy storage for applications requiring intermittent power delivery or load leveling.

Working Principle

Operates on the principle of rotational inertia, where kinetic energy (E=½Iω²) is stored in the rotating mass. The rim's concentrated mass at the outer diameter maximizes the moment of inertia (I=mr²), allowing it to absorb energy during acceleration and release it during deceleration, thereby stabilizing rotational speed and power output.

Materials

Typically manufactured from high-strength steel alloys (AISI 4140, 4340), ductile iron (ASTM A536), or composite materials. Material selection depends on required strength-to-weight ratio, rotational speed, and operating environment.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Mass	10-500 kg
Width	50-300 mm
Maximum RPM	1000-6000
Balance Grade	G6.3 per ISO 1940
Outer Diameter	300-2000 mm
Surface Finish	Ra 3.2 μm
Moment Of Inertia	0.5-50 kg·m²

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 1940-1, DIN 45665, ISO 10816, ASTM A536

Parent Products

This component is used in the following industrial products

Flywheel

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

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Engineering Analysis

Risks & Mitigation

Catastrophic failure at high RPM
Fatigue cracking from cyclic loading
Imbalance causing vibration
Bearing overload from unbalance
Material degradation at elevated temperatures

FMEA Triads

Trigger: Material fatigue from cyclic stress
Failure: Crack propagation leading to rim fracture
Mitigation: Regular non-destructive testing, proper material selection, stress relief treatments

Trigger: Dynamic imbalance during operation
Failure: Excessive vibration damaging bearings and mounts
Mitigation: Precision balancing to ISO 1940 standards, proper installation procedures

Trigger: Overspeed operation
Failure: Centrifugal force exceeding material strength
Mitigation: Speed limiting devices, overspeed sensors, proper speed calculations

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Radial runout: ±0.1 mm, Balance tolerance: G6.3 per ISO 1940, Dimensional tolerance: IT7

Test Method

Dynamic balancing per ISO 1940-1, Ultrasonic testing for defects, Dimensional verification with CMM, Hardness testing per ASTM E18

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Flywheel rim

Manufacturer profiles associated with Flywheel rim.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a flywheel rim?

The primary function is to store rotational kinetic energy and stabilize angular velocity by smoothing out torque fluctuations in mechanical systems.

How does rim material affect flywheel performance?

Material density determines energy storage capacity, while tensile strength limits maximum rotational speed. High-strength alloys allow higher RPM operation, while composites reduce weight for given inertia.

What maintenance does a flywheel rim require?

Regular inspection for cracks, balance verification, surface condition monitoring, and bolt torque checks on mounting connections.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Flywheel rim