Editorial Technical Reference

Precision Machined Components

This page explains how Precision Machined Components is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Precision CNC machined components are drawing-controlled parts made by milling, turning, grinding or EDM for assemblies requiring repeatable fit and finish.

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Product Specifications

Technical details and manufacturing context for Precision Machined Components

Definition
Precision CNC machined components are drawing-controlled parts produced by milling, turning, grinding or electrical discharge machining. They are used where repeatable dimensions, geometry and surface condition affect fit, motion, sealing or assembly. Procurement should provide the revision-controlled drawing, material grade, heat treatment, dimensional and geometric tolerances, surface roughness, threads, coatings and lot quantity. Suppliers should explain process capability, in-process measurement, final CMM or gauge inspection, traceability and nonconformance control. The displayed tolerance and finish ranges are RFQ references, not blanket capability claims; critical dimensions and inspection methods must be agreed with the legal manufacturer for the actual part drawing. Typical materials include stainless steel, aluminum alloys, titanium, engineering plastics, and brass. Reference parameters include dimensional tolerance ±0.005–±0.01 mm, surface roughness 0.4–1.6 µm Ra (ISO 1302), geometric tolerance 0.01–0.02 mm (ISO 1101), material hardness 20–60 HRC (ISO 6508), material grades such as 304/316L, 6061-T6, 45# (ASTM A276; ASTM B211; GB/T 699), part weight 0.1–50 kg, surface treatments like anodizing, plating, passivation (MIL-A-8625; ASTM B117), and supplier quality systems ISO 9001 or IATF 16949 for automotive supply. These values are indicative and must be verified against the specific drawing and application. Always confirm critical dimensions, tolerances, and inspection methods with the legal manufacturer or supplier.
Working Principle
Precision machining involves removing material from a workpiece using cutting tools controlled by computer numerical control (CNC) systems. The process follows digital design specifications (CAD/CAM) to achieve exact dimensions, shapes, and surface characteristics. Material is precisely removed through controlled cutting, grinding, or erosion processes, with continuous measurement and feedback ensuring adherence to specified tolerances and quality standards.
Common Materials
Stainless Steel, Aluminum Alloys, Titanium, Engineering Plastics, Brass
Technical Parameters
ParameterTypical rangeNotes & selection driver
Dimensional ToleranceRequired±0.005–±0.01 mmDrawing-specific range; verify critical dimensions with calibrated CMM or gauges.
Surface RoughnessRequired0.4–1.6 µm RaSpecify the required surface and measurement location on the part drawing.ISO 1302
Geometric ToleranceRequired0.01–0.02 mmDrawing-specific form, orientation or location tolerance.ISO 1101
Material Hardness20–60 HRCVerify hardness after the specified heat-treatment condition.ISO 6508
Material Grade304/316L, 6061-T6, 45#Select and verify the exact grade from the part drawing.ASTM A276; ASTM B211; GB/T 699
Part Weight0.1–50 kgIndicative RFQ range; provide drawing mass and handling constraints.
Surface TreatmentAnodizing, plating, passivationSpecify coating type, thickness, masked areas and corrosion requirement.MIL-A-8625; ASTM B117
Supplier Quality SystemISO 9001; IATF 16949 for automotive supplySpecify the required supplier QMS and verify current certification.ISO 9001; IATF 16949

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

Components / BOM
  • Mounting Surface Part
    Provides flat reference plane for secure attachment to assemblies
    Material: Same as base material with precision finishing
  • Bore/Hole Features Part
    Accurate cylindrical openings for shafts, fasteners, or fluid passage
    Material: Same as base material with precision machining
  • Threaded Features Part
    Precision-cut threads for fastening or adjustment purposes
    Material: Same as base material with thread machining
  • Sealing Surface Part
    Precision-finished area for gasket or seal installation
    Material: Same as base material with specialized surface treatment

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Precision Machined Components.

Precision Machined Parts CNC Machined Components High-Precision Engineered Parts Precision Turned Components

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 1000 bar
flow rate: Dependent on component geometry and application
temperature: -50°C to 400°C
slurry concentration: Up to 40% solids by weight (material dependent)
Media Compatibility
✓ Hydraulic fluids (mineral oil, synthetic) ✓ Process gases (air, nitrogen, inert gases) ✓ Clean process liquids (water, chemicals)
Unsuitable: Highly abrasive slurries with hard particles >100 microns
Sizing Data Required
  • Required dimensional tolerances (e.g., ±0.001 mm)
  • Geometric specifications (flatness, roundness, surface finish Ra)
  • Operating pressure and temperature conditions

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Surface fatigue (pitting/spalling)
Cause: Cyclic loading leading to subsurface crack initiation and propagation, often from improper heat treatment, material impurities, or exceeding design load limits.
Geometric distortion (warping/bending)
Cause: Residual stress relief from machining, uneven thermal expansion during operation, or external overloading causing permanent deformation beyond tolerances.
Maintenance Indicators
  • Audible high-frequency vibration or rhythmic knocking during operation
  • Visual scoring/galling on mating surfaces or metallic debris in lubrication systems
Engineering Tips
  • Implement precision alignment procedures and thermal stabilization protocols before critical operations
  • Use engineered surface treatments (e.g., nitriding, DLC coatings) and monitor lubrication purity with particle counting

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 2768-1: General tolerances for linear and angular dimensions ANSI B4.1: Preferred Limits and Fits for Cylindrical Parts

Quoted from the published standard.

Manufacturing Precision
  • Bore: +/-0.02mm
  • Flatness: 0.1mm
Quality Inspection
  • Dimensional Verification using CMM (Coordinate Measuring Machine)
  • Surface Roughness Measurement per ISO 4287

Manufacturers of Precision Machined Components

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Dongguan Junyu Precision Mould Co., Ltd.
Dongguan, Guangdong, CN
Founded 2008
ISO9001 TS16949 IATF
Also makes: CNC Machined Part, Precision CNC Machining Center
Stated by the company · profile compiled by CNFX from public sources
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Shenzhen VMT Metal Product Co., Limited
Shenzhen, Guangdong, CN
Founded 2003120 People staff
ISO9001 16949 RoHS
Also makes: CNC Machined Part, Aluminum Mounting Bracket, Universal CNC Lathe
Listed on the company's own website · profile compiled by CNFX from public sources
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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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.

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Frequently Asked Questions

What materials are commonly used for precision machined components?

Common materials include stainless steel, aluminum alloys, titanium, engineering plastics, and brass. The exact grade must be specified on the part drawing and verified with the supplier.

What tolerances can be achieved?

Dimensional tolerance ranges are typically ±0.005 to ±0.01 mm, but these are drawing-specific. Critical dimensions must be verified with calibrated CMM or gauges and agreed with the manufacturer.

How is surface roughness specified?

Surface roughness is specified in µm Ra, typically 0.4–1.6, per ISO 1302. The required surface and measurement location must be indicated on the part drawing.

What quality systems should suppliers have?

Suppliers should have ISO 9001 certification, or IATF 16949 for automotive supply. Verify current certification and ensure they have process control and traceability measures.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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