INDUSTRY COMPONENT

Armature Plate

Armature plate is the rotating component in electromagnetic clutch-brake units that engages/disengages torque transmission via magnetic attraction.

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Component Specifications

Definition
The armature plate is a critical rotating component in industrial electromagnetic clutch-brake systems, typically mounted on the output shaft. It functions as the movable element that engages with the stationary electromagnetic coil assembly when energized, creating magnetic attraction that transmits torque through friction surfaces. During disengagement (de-energized state), spring mechanisms or air gaps separate the armature from the coil, interrupting torque transmission. Precision machining ensures flatness and parallel alignment to maintain consistent air gaps and engagement characteristics.
Working Principle
Operates on electromagnetic induction principles: when the stationary coil is energized, it generates a magnetic field that attracts the rotating armature plate, creating friction contact between the armature's friction surface and the coil's mating surface. This magnetic attraction transmits torque from the input to output side. De-energizing the coil eliminates magnetic attraction, allowing separation springs or centrifugal force to disengage the armature, interrupting torque transmission with minimal residual drag.
Materials
Low-carbon steel (AISI 1010/1018) with hardened friction surfaces, alternative materials include silicon steel laminations for reduced eddy currents, or aluminum alloys with steel inserts for weight reduction in high-speed applications. Surface treatments: phosphate coating for corrosion resistance, grinding to Ra 0.8-1.6μm surface finish.
Technical Parameters
  • Air gap 0.2-0.5 mm
  • Diameter 50-300 mm
  • Thickness 3-10 mm
  • Parallelism ≤0.01 mm
  • Torque capacity 5-500 Nm
  • Flatness tolerance ≤0.02 mm
  • Maximum rotational speed 3000-8000 rpm
  • Friction surface hardness 45-55 HRC
Standards
ISO 16030, DIN 15435, JIS B 1452

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Armature Plate.

electromagnetic clutch armature brake plate rotating disc torque transmission component industrial clutch parts magnetic engagement plate Armature Plate Armature Plate in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Industrial Electromagnetic Clutch-Brake Unit

Standalone machine for precise torque transmission and stopping in electrical equipment assembly

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Base Unit / Drive Unit

The foundational component of a vibratory bowl feeder that houses the electromagnetic drive mechanism and provides structural support.

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Electromagnetic Brake Assembly

A braking device that uses electromagnetic force to engage and disengage, providing controlled stopping or holding torque.

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Engineering Analysis

Risks & Mitigation
  • Magnetic adhesion failure
  • Thermal warping from overheating
  • Fatigue cracking at mounting holes
  • Corrosion in humid environments
  • Imbalance causing vibration
FMEA Triads
Trigger: Excessive heat generation during prolonged slip engagement
Failure: Thermal distortion changes air gap, reducing torque capacity
Mitigation: Incorporate cooling fins, use high-temperature materials, implement slip time monitoring
Trigger: Improper mounting causing misalignment
Failure: Uneven wear patterns and vibration transmission
Mitigation: Precision machining of mounting surfaces, use alignment fixtures during installation
Trigger: Material fatigue from cyclic loading
Failure: Crack propagation from mounting holes leading to catastrophic failure
Mitigation: Fillet radii on stress concentration points, regular non-destructive testing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Flatness: ±0.02mm, Thickness: ±0.05mm, Diameter: ±0.1mm, Hardness: ±3 HRC
Test Method
Magnetic pull force testing per ISO 16030, surface flatness via optical comparator, dynamic balance testing at 1.5x operational speed

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What causes armature plate wear in clutch-brake units?

Primary wear factors include friction surface degradation from cyclic engagement, thermal stress from slip-generated heat, contamination from worn friction material particles, and misalignment causing uneven contact pressure.

How often should armature plates be inspected?

Visual inspection every 500 operating hours, dimensional checks every 2000 hours or 6 months. Replace when friction surface wear exceeds 20% of original thickness or flatness exceeds 0.05mm tolerance.

Can armature plates be resurfaced?

Limited regrinding is possible if minimum thickness specifications are maintained, but replacement is recommended when wear exceeds 30% as heat treatment integrity diminishes with material removal.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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Arm Structure/Links Armature Shaft