INDUSTRY COMPONENT

Cup Body

High-precision cup body component for percussion primer systems requiring exact dimensional tolerances and material consistency.

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Component Specifications

Definition
The Cup Body is a critical structural component in precision percussion primer systems, designed to contain and direct the explosive force during primer ignition. It functions as the primary housing that maintains primer alignment, withstands high-pressure combustion, and ensures consistent firing performance. This component requires exacting dimensional tolerances (±0.005mm), uniform wall thickness, and specific material properties to prevent deformation under repeated percussion forces.
Working Principle
The Cup Body operates by containing the percussion primer compound and transferring the impact force from the firing pin through its structure to initiate the primer. Its geometry directs the resulting flame front toward the main propellant charge while maintaining structural integrity under pressures up to 50,000 psi. The component's design ensures consistent primer seating depth and prevents gas leakage during ignition.
Materials
High-strength brass alloy (C26000) with 70% copper, 30% zinc, trace elements ≤0.15%. Hardness: Rockwell B 80-85. Grain structure: ASTM E112 grain size 8 or finer. Surface finish: Ra 0.4μm maximum.
Technical Parameters
  • height 3.81mm ±0.004mm
  • weight 0.85g ±0.02g
  • inner_diameter 4.75mm ±0.003mm
  • outer_diameter 5.56mm ±0.005mm
  • wall_thickness 0.405mm ±0.002mm
  • pressure_rating 50,000 psi burst strength
  • volume_capacity 0.12cm³
  • operating_temperature -40°C to +200°C
Standards
ISO 9001:2015, ISO/IEC 17025, SAE AS9100, MIL-STD-1913

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cup Body.

percussion primer cup ammunition component precision cup body primer housing brass primer cup detonation component precision manufacturing Cup Body Cup Body in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Precision Percussion Primer Cup

Small metallic cup containing explosive compound for initiating ammunition propellant.

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Engineering Analysis

Risks & Mitigation
  • Material inconsistency affecting pressure tolerance
  • Dimensional variation causing primer misfires
  • Micro-cracks from manufacturing stress
  • Corrosion in humid environments
  • Work hardening during production
FMEA Triads
Trigger: Material alloy inconsistency
Failure: Premature cracking under pressure
Mitigation: Implement batch material certification with spectrographic analysis and hardness testing for every production lot
Trigger: Dimensional tolerance drift
Failure: Primer seating depth variation causing misfires
Mitigation: Automated optical measurement systems with SPC monitoring and tool wear compensation algorithms
Trigger: Surface contamination
Failure: Inconsistent ignition timing
Mitigation: Ultrasonic cleaning with deionized water followed by nitrogen drying in controlled environment

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Geometric dimensioning and tolerancing per ASME Y14.5-2018, Position tolerance: 0.010mm, Circularity: 0.005mm
Test Method
Coordinate measuring machine (CMM) verification, pressure testing to 150% rated capacity, metallurgical analysis for grain structure and hardness, leak testing with helium mass spectrometry

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 tolerance standards must the Cup Body maintain?

The Cup Body requires dimensional tolerances of ±0.005mm for critical dimensions, with wall thickness consistency within ±0.002mm to ensure uniform pressure distribution during primer ignition.

Why is brass alloy C26000 specified for this component?

C26000 brass provides optimal combination of strength, corrosion resistance, and machinability while maintaining consistent material properties across production batches. Its specific composition prevents work hardening during forming operations.

How does the Cup Body prevent gas leakage during ignition?

Precision machining creates an interference fit with the primer anvil, while the uniform wall thickness and specific material properties prevent deformation under high pressure, maintaining seal integrity throughout the ignition sequence.

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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