Brass Turned Parts – Brass Turned Components

Brass Turned Parts – Brass Turned Components

Brass turned parts — also called brass turned components, brass lathe-turned parts, brass CNC-turned components, brass precision turned parts, or brass bar-turned parts — are metal components produced by rotating brass bar stock against cutting tools to create cylindrical, conical, threaded, or profiled geometries. Electrical Accessories India manufactures brass turned parts from CW614N (CuZn39Pb3), CW617N (CuZn40Pb2), CZ121 (IS 319), and related free-cutting brass alloys using CNC turning centres, Swiss-type lathes, and multi-spindle automatic machines. Our brass turned components are supplied to electrical equipment manufacturers, EPC contractors, panel board builders, instrumentation OEMs, and industrial distributors across India and 30+ export markets.

Product Overview

Brass Turned Parts: Definition and Scope

Brass turning is the process of holding a brass workpiece in a lathe chuck or collet and rotating it against fixed cutting tools to remove material and create the desired component shape. Turned parts typically have rotational symmetry (cylindrical, hexagonal, or tapered profiles) and may incorporate multiple diameters, internal bores, external and internal threads, grooves, undercuts, knurls, and drilled cross-holes. The combination of dimensional accuracy, smooth surface finish, and the ease of machining free-cutting brass makes brass turned parts the dominant component form in electrical and mechanical hardware applications.

Alloy Grades for Brass Turned Parts

CW614N (CuZn39Pb3) is the industry standard for brass turned parts worldwide. With 57–59% copper, approximately 39% zinc, and 2.5–3.5% lead as a free-cutting additive, CW614N offers a machinability index of 100, excellent corrosion resistance, and good mechanical properties. CW617N (CuZn40Pb2) has slightly higher zinc and is used where stronger extruded or forged bar is required. CZ121 (BS designation for CuZn39Pb3) is the same alloy under the British standard. IS 319 Types 1 and 2 are the Indian equivalent grades. Electrical Accessories India maintains certified stock of all standard grades with MTRs for traceability.

Production Platforms for Brass Turned Parts

Electrical Accessories India uses three primary production platforms for brass turned parts, selected based on component complexity and batch size. CNC turning centres with live tooling handle complex multi-feature parts, small-to-medium batches, and prototypes with full programmability. Multi-spindle automatic screw machines achieve the highest output rates (4–8 parts simultaneously) for high-volume, simpler-geometry components. Swiss-type CNC lathes (Citizen, Star, Tsugami) are used for small-diameter, long-length, and high-precision parts requiring guide bushing support. Secondary operations — tapping, drilling, milling, knurling — are performed in-line on live-tool machines or as separate operations.

Dimensional Capabilities and Tolerances

Brass turned parts from Electrical Accessories India cover: diameter range 2–150 mm, length range 3–500 mm, thread range M3–M64 metric and BSP, UNC, UNF imperial threads. Dimensional tolerances: ±0.05 mm general, ±0.01 mm precision, ±0.005 mm on ground surfaces. Thread tolerances: 6g/6H (ISO 965). Surface finish: Ra 0.8–3.2 µm as-turned, Ra 0.1 µm polished. Geometric tolerances (roundness, cylindricity, concentricity) held to ISO 286 quality grades IT6–IT8 as standard, IT4–IT5 for precision work.

Quality Control and Inspection

Each batch of brass turned components undergoes systematic quality control. First-article inspection (FAI) is performed before every production run, with all drawing dimensions checked and recorded. In-process checks at defined intervals cover critical dimensions using calibrated micrometers, vernier gauges, and plug/ring gauges. Thread gauging (Go/No-Go) is performed 100% on all threaded parts. Final AQL inspection to ISO 2859 Level II covers visual, dimensional, and functional checks. Measurement results are recorded in inspection reports supplied with each shipment.

Packaging and Export

Brass turned parts are packed in polythene bags (individual or bulk), placed in cardboard boxes or wooden crates as appropriate for the shipment size. Export packaging for sea freight includes moisture-barrier bags with desiccants and anti-tarnish wrapping to prevent brass tarnishing in transit. Packing lists with individual part numbers, quantities, and weights are provided. Export documentation: commercial invoice, packing list, certificate of origin (COO) from DGFT/FIEO, material test reports, and certificate of conformance. HS code for brass turned parts: 7415.39 or 7419.80.

Key Features

• Alloys: CW614N (CuZn39Pb3), CW617N, CZ121, IS 319 — machinability index 100
• Diameter range: 2–150 mm; length range: 3–500 mm; thread range: M3–M64
• Tolerances: ±0.01 mm precision; 6g/6H threads; Ra 0.8–3.2 µm surface finish
• CNC turning centres, multi-spindle automatics, Swiss-type lathes
• Secondary operations: tapping, cross-drilling, milling, knurling, slotting in-line
• Surface treatment options: nickel plating, tin plating, chrome, passivation
• Full FAI (First Article Inspection) with dimensional report for new parts
• ISO 9001:2015 certified; EN 10204 3.1 MTRs on request
• Annual blanket orders and VMI supply arrangements available
• Export to 30+ countries with full shipping documentation

Material Grades and International Equivalents

Technical Specifications

Product Types and Variants

Brass turned components from Electrical Accessories India span: Brass connector bodies — multi-diameter turned profiles for cable glands, conduit connectors, and junction box fittings; Brass terminal inserts and pins for switchgear and panel board applications; Brass standoffs and spacers for PCB and panel mounting; Brass hex-head inserts for injection moulded housings; Brass compression fitting bodies and union nuts; Brass adapters and reducers for conduit and cable management systems; Brass valve stems and spindles for industrial valves; Custom brass turned parts to customer 2D drawing or 3D STEP model for any OEM or industrial application.

Applications in Industry

Brass turned components are used throughout the electrical and mechanical industries. Electrical equipment manufacturers use brass turned parts for cable gland bodies, terminal studs, earth connectors, busbar fittings, and panel-board hardware. Switchgear and controlgear OEMs use brass turned pins, sockets, and contact components. Instrumentation and process uses brass turned fittings — compression bodies, adapters, and manifold components. Automotive applications include fuel system connectors, pneumatic fittings, and sensor bodies. Plumbing and HVAC use brass turned valve bodies, fitting connectors, and manifold components. Telecommunications uses brass turned RF connector bodies and coaxial fitting components.

Manufacturing Process

1. Material Receipt: Certified brass rod received; MTR verified; OD and straightness checked.
2. Programming: CNC program generated from 2D drawing or 3D model; simulation verified.
3. Setup: Tool setting, collet/chuck selection, barfeed loading.
4. First-Article Inspection: All critical dimensions checked; FAI report generated.
5. Production Turning: OD turning, facing, boring, grooving, threading, parting.
6. Live-Tool Operations: Cross-drilling, milling, tapping performed in same setup.
7. Deburring: Vibratory or hand deburring; chamfer applied per drawing.
8. In-Process QC: Dimension check every 200–500 pieces; thread gauging 100%.
9. Finishing: Plating, polishing, or passivation per specification.
10. Final Inspection and Packing: AQL inspection; batch records; export packing.

Quality Standards and Certifications

Brass turned parts manufactured per: ISO 9001:2015 QMS; EN 12164 (free-cutting brass rod CW614N); ASTM B16 (C36000 free-cutting brass rod); IS 319 (Indian free-cutting brass); ISO 965 (metric thread tolerances); ISO 286 (dimensional tolerances and fits); ISO 1302 (surface texture); RoHS 2011/65/EU — lead-free and low-lead alloys available; REACH SVHC compliance declarations available. EN 10204 2.2 or 3.1 material test reports with every production batch.

Why Choose Electrical Accessories India

Electrical Accessories India has decades of experience in precision brass turned component manufacturing from Jamnagar — India’s brass machining capital with 5,000+ brass manufacturers in a 10 km radius providing the most competitive brass supply chain in the world. Our turned parts facility combines modern CNC equipment with experienced toolmakers, a dedicated quality department, and in-house finishing capabilities. We produce complete families of brass components — turned, forged, cast, and stamped — from one source, reducing your supplier base and simplifying procurement. Technical support from engineers with deep application knowledge in electrical, instrumentation, and industrial applications.

Frequently Asked Questions (FAQ)

What is the difference between turned parts and machined parts?

Turning is a specific machining process where the workpiece rotates and the cutting tool is stationary — producing cylindrical, threaded, and profiled components. “Machined parts” is a broader term covering turning, milling, drilling, grinding, and other subtractive processes. Brass turned parts are a subset of brass machined parts, specifically produced by the turning process on lathes and turning centres.

Can you turn brass parts to customer drawings?

Yes. We work from 2D PDF/DXF/DWG drawings or 3D STEP/IGES/SolidWorks models. DFM review is provided for new parts — we identify potential machining challenges and suggest cost-saving design modifications. First-article samples are supplied for customer approval before mass production.

What is CZ121 brass?

CZ121 is the British Standard (BS 2874) designation for free-cutting brass, equivalent to CW614N (EN), IS 319 Type 1 (India), and C36000 (ASTM). It contains approximately 57–59% copper, 39% zinc, and 3% lead. CZ121 is specified by UK OEMs and buyers familiar with BS standards — Electrical Accessories India supplies this grade as standard stock.

What is the minimum order quantity?

MOQ depends on complexity. Standard turned parts: 1,000–5,000 pieces. Complex multi-operation parts: 500 pieces. Prototype samples: 10–50 pieces at sample pricing. Annual blanket orders welcome with monthly call-offs from stock.

Do you offer just-in-time delivery?

Yes. For long-term supply contracts, Electrical Accessories India maintains safety stock at our facility and dispatches per agreed call-off schedule. Minimum lead time for repeat orders from stock: 1–3 business days. New production lead time: 3–6 weeks.

Can you supply both turned and forged brass components?

Yes. Electrical Accessories India is a full-service brass component manufacturer — we supply turned parts, forged parts, stamped parts, and cast parts from the same facility. This allows consolidated procurement of complete hardware families for electrical equipment manufacturers.

What plating thickness is standard for nickel-plated brass turned parts?

Standard bright nickel plating: 3–8 µm. Electroless nickel plating (ENP): 5–25 µm. Heavy nickel: 8–15 µm. Tin plating: 5–15 µm. Plating thickness verified by cross-section and XRF measurement. ASTM B733 / B545 compliance certificates available.

Are your brass turned parts RoHS compliant?

CW614N contains lead (2.5–3.5%) which is subject to RoHS Directive 2011/65/EU Annex II exemption 6(c) for lead in brass alloys used in fittings — this exemption covers most electrical and plumbing brass parts. For applications requiring lead-free compliance, low-lead or bismuth-brass alloys are available. RoHS declarations and REACH SVHC declarations provided with each shipment.

Equivalent Terms – Multilingual Reference

Related Products and Linked Terms

• Brass Parts – Brass CNC Machined Parts
• Brass Screw Machine Parts
• CZ121 Brass Turned Parts
• CW614N Brass Components and Parts
• CuZn39Pb3 Brass Parts and Components
• Brass Forging Parts – Brass Forged Components
• Copper Machined Parts

Request a Quote

Supply your drawing, sample, or specification and receive a detailed technical proposal within 24 hours. Electrical Accessories India engineers are available to advise on alloy selection, turning process, tolerances, and post-processing for your specific application. We export to 30+ countries with full shipping documentation including Certificate of Origin, Packing List, and Material Test Reports.

Contact us: Send your RFQ with quantity, grade, drawing (PDF/DXF/STEP), and delivery requirement. We respond within 24 business hours.