Aluminum Screw Machine Parts

Aluminum Screw Machine Parts – Precision CNC Turned and Auto-Screw Machined Aluminum Components

Aluminum screw machine parts are high-precision, rotationally or prismatically machined components produced on CNC Swiss screw machines, multi-spindle automatic screw machines, and CNC turning centers from aluminum bar stock. Brass and Copper Parts manufactures aluminum screw machine parts in free-machining alloys including 6061-T6, 6082-T6, 2011-T3, 2024-T4, 7075-T6, and 1350 series for applications in electrical connectors, fasteners, standoffs, bushings, spacers, fittings, and precision instrumentation components. Supplying USA buyers, electrical OEMs, EPC contractors, and industrial distributors requiring tight-tolerance, high-volume aluminum turned parts with full traceability.

Product Overview

Aluminum screw machine parts (auto-turned parts / CNC turned components) are produced from aluminum rod or bar on automatic turning machines achieving dimensional tolerances of ±0.01mm to ±0.05mm, surface finishes of Ra 0.8–1.6 µm, and production rates of 100–10,000 parts per shift depending on part complexity and machine type. Swiss-type CNC screw machines are used for long, slender parts (L/D ratio > 3:1) requiring simultaneous multi-axis operations. Multi-spindle screw machines produce high volumes of simpler turned parts at lowest unit cost. Brass and Copper Parts offers single to multi-spindle capability, with full secondary operations including anodizing, hard anodizing, chromate conversion, and precision thread rolling.

Product Types and Variants

By Component Type

• Aluminum Standoffs and Spacers – Hex, round, and square standoffs; male-female, male-male, female-female; for PCB, panel, and structural assembly
• Aluminum Bushings and Sleeves – Plain, flanged, and stepped bushings; pivot bushings, shaft sleeves, bearing liners
• Aluminum Threaded Inserts and Nuts – Precision machined threaded inserts for plastic, composite, and aluminum assemblies
• Aluminum Connector Bodies and Pins – Electrical connector shells, contact pins, backshell bodies, gland bodies
• Aluminum Fittings and Adapters – Hydraulic and pneumatic fittings, hose barbs, compression fittings, push-to-connect adapter bodies
• Aluminum Shoulder Screws and Fasteners – Precision shoulder screws, thumb screws, captive screws, knurled thumb nuts
• Aluminum Valve and Instrument Components – Valve spools, nozzle bodies, orifice fittings, sensor housings, instrument adapters
• Aluminum Custom Turned Parts – Any rotationally symmetric or near-symmetric component to customer drawing

By Machining Process

• CNC Swiss Screw Machine Parts – Long slender parts with L/D > 3:1; ±0.01mm tolerance; simultaneous OD, ID, and thread operations
• Multi-Spindle Screw Machine Parts – High-volume simple turned parts; 4–8 spindles; lowest unit cost for 50,000+ pieces/year
• CNC Turning Center Parts (Single Spindle) – Complex geometry, milled features, cross-drilled holes; for low-to-medium volumes
• CNC Turn-Mill Parts – Combined turning and milling in one setup; for parts requiring off-axis features, flats, cross holes, and slots

By Alloy Grade

• 2011-T3 (Free-Cutting Aluminum) – Best machinability; for high-speed screw machine production; good strength
• 6061-T6 – Most versatile; excellent corrosion resistance, weldability, anodizability; for structural and electrical parts
• 6082-T6 – European equivalent of 6061; superior strength; for structural machined components
• 2024-T4 – High strength-to-weight; for aerospace and high-load structural components
• 7075-T6 – Highest strength aluminum; for critical structural and precision aerospace parts
• 1350-H14 (Electrical Grade) – 99.5% minimum Al; 61% IACS conductivity; for electrical conductor components and grounding hardware

Key Features

• Dimensional tolerances: ±0.01mm (Swiss CNC); ±0.025mm (multi-spindle); ±0.05mm (CNC turning center)
• Surface finish: Ra 0.8–1.6 µm as-machined; Ra 0.4 µm after grinding or superfinishing
• High-volume production capability: 100,000+ pieces per month
• Complete thread forms: UNC, UNF, Metric, BSPP, BSPT, NPT, NPTF
• Knurling (straight, diamond, cross), milling, slotting, and drilling in single setup
• Full anodizing capability: Type I (chromic), Type II (sulphuric), Type III (hard anodize)
• Electrical grade aluminum (AA1350) machined parts with 61% IACS conductivity
• RoHS 2 and REACH compliant; DFARS-compliant domestic aluminum available

Technical Specifications

Aluminum Alloy Grades and International Equivalents

Applications in Industry

• Electrical OEMs: Aluminum connector shells, gland bodies, terminal block spacers, cable gland lock nuts, ground studs, panel standoffs, PCB mount hardware
• EPC Contractors and Industrial: Instrument fitting adapters, manifold nipples, hydraulic coupling bodies, pneumatic valve spools, sensor housings for field instrumentation
• Power Utilities: Aluminum grounding hardware (AA1350), earthing rod couplers, earthing grid connection components, substation structural inserts
• Aerospace and Defense: Precision 7075-T6 and 2024-T4 structural inserts, aircraft-grade standoffs, avionics housing bushings, MIL-SPEC connector components
• Automotive and EV: CNC turned bracket inserts, EV battery busbar spacers, motor encoder bodies, transmission sensor housings, threaded inserts for composite parts
• Medical and Scientific: Anodized instrument housings, optical bench components, precision spacers and adapters for laboratory and diagnostic equipment

Manufacturing Process

Aluminum screw machine parts at Brass and Copper Parts are produced from drawn aluminum bar and rod conforming to ASTM B211 (bar/rod) and ASTM B221 (extrusions). Material is certified for alloy composition and temper before loading into automatic or CNC screw machines. Swiss CNC machines perform simultaneous front and back working with live tooling for milling and cross-drilling in a single setup. Multi-spindle machines run high-volume parts in parallel spindles at cycle times of 5–30 seconds per part. After machining, parts are deburred, cleaned, and inspected dimensionally using CMM, air gauges, and thread plug/ring gauges. Anodizing, chromate, or other surface treatments are applied before final inspection and packaging.

Quality Standards and Certifications

• ASTM B211 – Aluminum and Aluminum-Alloy Bar, Rod, and Wire
• ASTM B221 – Aluminum and Aluminum-Alloy Extruded Bars, Rods, and Shapes
• AMS 2470 / AMS 2471 – Anodic Coatings for Aluminum (Type II and III)
• MIL-A-8625 – Anodic Coatings for Aluminum and Aluminum Alloys
• AMS 2473 – Chemical Film Treatment for Aluminum Alloys (Chromate)
• RoHS 2 Directive Compliant; REACH Regulation Compliant
• ISO 9001:2015 Quality Management System
• PPAP and AS9100 documentation available for aerospace and automotive customers

Why Choose Brass and Copper Parts

• Swiss CNC, multi-spindle, and CNC turn-mill capability under one roof
• 2mm to 300mm diameter; 3mm to 1,000mm length range
• All major aluminum alloys: 2011, 6061, 6082, 2024, 7075, 1350
• Type II and Type III hard anodize in-house for corrosion and wear protection
• High-volume supply (1,000,000+ pcs/year) with JIT delivery programs
• Full CMM inspection, thread gauging, and material certification on all orders

Frequently Asked Questions

What is an aluminum screw machine part?

An aluminum screw machine part is a precision turned or machined component produced from aluminum bar or rod on automatic screw machines (Swiss CNC, multi-spindle, or CNC turning centers). These processes produce tight-tolerance, high-volume components such as standoffs, bushings, fittings, connector bodies, and fasteners.

What is the best aluminum alloy for screw machine production?

2011-T3 offers the best machinability for high-speed screw machine production. 6061-T6 is most versatile for parts requiring corrosion resistance, anodizability, and weldability. 7075-T6 is used where maximum strength is required. AA1350 is specified for electrical conductor components requiring 61% IACS conductivity.

What tolerances can CNC Swiss screw machines achieve?

CNC Swiss screw machines achieve dimensional tolerances of ±0.005mm to ±0.01mm for diameter and length, with concentricity within 0.01mm TIR. This level of precision is suitable for precision pins, shafts, and connector contacts requiring interference fits or sliding fits.

Can you produce aluminum parts with internal and cross-drilled holes?

Yes. CNC turn-mill machines and Swiss CNC machines with live tooling perform cross-drilling, milling, slotting, and hex broaching in a single setup without re-fixturing, ensuring maximum positional accuracy between turned and milled features.

What anodizing types are available?

We offer Type I (chromic acid, ≤5 µm), Type II (sulphuric acid, 12–25 µm standard), and Type III (hard anodize, 25–50 µm, for wear resistance). Clear, black, and custom colour anodizing available. Type III hard anodize achieves hardness of 400–600 HV for wear-resistant applications.

Do you supply to aerospace quality requirements?

Yes. We supply 7075-T6 and 2024-T4 aluminum screw machine parts to aerospace OEMs with AS9100 documentation, AMS material certifications, first article inspection reports (FAIR), and PPAP Level 3 documentation as required.

What thread forms can you produce?

We produce all standard thread forms: UNC, UNF, UNEF, Metric coarse and fine (M), BSPP (G), BSPT (R), NPT, NPTF, and specialty threads including Acme, STUB Acme, and custom profiles per drawing.

What is the minimum order quantity?

Minimum order is 100 pieces for standard turned parts. High-volume programs (50,000+ pieces/year) receive volume pricing. Prototype quantities (10–50 pieces) are available for new product development and qualification.

What is the lead time for aluminum screw machine parts?

Standard turned parts: 2–4 weeks. Complex Swiss CNC or turn-mill parts: 3–6 weeks. Expedited service is available. JIT kanban supply programs are set up for repeat OEM customers.

Do you provide material test certificates?

Yes. Material Test Certificates per EN 10204 2.1 or 3.1 with certified alloy composition and temper are provided. Dimensional inspection reports and surface treatment certificates are available on request.

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Request a Quote

Need precision aluminum screw machine parts for your OEM or EPC project? Brass and Copper Parts supplies CNC Swiss, multi-spindle, and turn-mill aluminum turned components in 2011, 6061, 6082, 7075, 1350, and custom alloys to electrical OEMs, aerospace, automotive, and industrial customers in the USA and globally. Contact us with drawings or samples for competitive quotation and DFM review.