Cup Body: volume_capacity 0.12cm³, height 3.81mm ±0.004mm

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

Parameter	Typical range	Notes & selection driver
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

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 9001:2015, ISO/IEC 17025, SAE AS9100, MIL-STD-1913

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

Typical Suppliers & Equivalents

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

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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

Manufacturers of Cup Body

Manufacturer profiles associated with Cup Body.

Sourcing Cup Body from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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

Related Components

Mounting Interface

Precision mounting interface connecting punch tips to pharmaceutical tablet press machines for accurate tablet production.

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

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.

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.

Cup Body