Brass CNC Turned Parts — Precision Turned Components India

Jamnagar Brass Components is a leading manufacturer of precision brass CNC turned parts and components, supplying OEM manufacturers, engineering distributors, and industrial buyers across the USA, UK, and Europe. Machined from CZ121 free-machining brass, DZR brass, and other copper alloys, our turned parts are produced to tight tolerances on modern CNC turning centres and Swiss-type sliding-head lathes.

Our CNC Turning Capabilities

Our machining facility is equipped with multi-axis CNC turning centres and Swiss-type (sliding-head) CNC lathes for micro parts and long slender components. This allows us to produce a wide range of turned component types including simple bushings, spacers, and standoffs through to complex multi-feature parts with cross-drilling, milling, threading, and knurling in a single setup. Our turning capacity handles diameters from 1 mm to 150 mm and lengths up to 1000 mm.

Brass Alloys We Machine

CZ121 / C36000 free-machining brass is our most commonly used alloy, offering exceptional machinability, good corrosion resistance, and consistent dimensional properties. CW602N DZR brass is used for fittings in potable water, gas, and corrosive fluid applications. CW617N forging brass provides higher strength for pressure-bearing components. We also machine ECO Brass and bismuth brass for applications requiring lead-free compliance under NSF/ANSI 61 or California AB 1953.

Components We Produce

The range of brass CNC turned parts we produce includes valve stems, spindles, and seats, pipe fittings, nipples, and adapters, threaded inserts and helicoil inserts, electrical contacts and terminals, standoffs, spacers, and pillars, bushings, sleeves, and guide components, cable gland bodies and components, instrumentation and sensor bodies, and custom components from customer drawings and CAD files.

Tolerances and Surface Finishes

Standard dimensional tolerances on turned diameters are ±0.01 mm (IT6), with ±0.005 mm achievable for precision-critical features. Thread tolerances are held to 6H/6g for metric threads and 2B/2A for unified threads as standard. Surface roughness on turned surfaces is typically Ra 0.8 µm to Ra 3.2 µm. Finish options include natural brass, nickel plating, tin plating, chrome plating, and electroless nickel plating.

Quality and Export Experience

Our quality management system is certified to ISO 9001:2015. We provide full dimensional inspection reports, material test certificates, and RoHS/REACH compliance declarations with every shipment. Our established export logistics to the USA, UK, Germany, and Australia means reliable, on-time delivery with full customs documentation. Contact us for a quotation on your brass CNC turned part requirements.

Frequently Asked Questions — Brass CNC Turned Parts

Q1: What makes brass ideal for CNC turning?

Brass (especially free-machining CZ121/C36000 with 3% lead) has a machinability rating of approximately 100% on the standard machinability index — the highest of any engineering metal. It produces short, broken chips (not stringy like stainless steel), allows very high cutting speeds (300–600 m/min), requires less cutting force, and produces excellent surface finish directly from turning. This results in lower per-piece cost, faster cycle times, and longer tooling life compared to steel or stainless alternatives.

Q2: What types of brass CNC turned parts do you manufacture?

We manufacture a very wide range of brass CNC turned parts including: precision valve stems, fittings and connectors (BSP, NPT, metric thread), electrical contact pins and sleeves, cable gland bodies and locknuts, instrument and panel hardware, medical device components, automotive fuel system fittings, custom precision parts from drawings, and complex multi-feature components requiring live tooling (milling, cross-drilling, slotting in a single CNC setup).

Q3: What size range of CNC turned brass parts can you produce?

We produce CNC turned brass parts from 0.5 mm minimum diameter (using Swiss CNC turning) up to 200 mm maximum diameter on large CNC lathes. Part lengths range from 1 mm to 600 mm. For very small parts (below 5 mm diameter), Swiss-type CNC turning with guide bushing support provides maximum accuracy and surface finish. For large diameter parts (above 100 mm), bar-fed CNC lathes or chuck work is used depending on the required length.

Q4: What thread standards can you machine on brass turned parts?

We machine all standard thread forms on brass turned parts: metric ISO (M1 to M100, coarse and fine pitch), BSP (G and R threads per ISO 228/BS 21 in 1/16 inch to 6 inch), NPT and NPTF (per ASME B1.20.1/B1.20.3), UNC/UNF (per ASME B1.1), UN series, BA (British Association for instrument work), PG (German conduit thread), and any special thread form from customer drawings or gauges.

Q5: What tolerances are achievable on CNC turned brass parts?

Standard CNC turned brass diameters achieve ±0.025 mm (±0.001 inch). Precision Swiss CNC turned brass parts achieve ±0.005 mm on diameters and lengths. Thread tolerances per ISO 965 class 6H/6g or ASME B1.1 Class 3A/3B. Surface finish Ra 0.4–1.6 µm as turned; Ra 0.1–0.4 µm with burnishing or honing. 100% gauge verification of all threaded features is standard on production orders.

Q6: What is the typical volume capability for brass CNC turned parts?

We support annual volumes from 100 pieces (prototype/low volume) to over 5 million pieces per year on automated CNC multi-spindle and single-spindle turning machines. For high-volume standard brass fittings and connectors (above 50,000 pieces/year), cam-driven automatic lathes provide the lowest per-piece cost. For complex multi-feature parts (above 5 features), CNC turning centres with live tooling provide the best combination of flexibility and economy.

Q7: What plating and surface treatment options are available for brass CNC turned parts?

Available surface treatments: tin plating (5–10 µm bright tin, for corrosion resistance and solderability), nickel plating (3–15 µm, for harder, more corrosion-resistant surface), chrome plating (decorative and hard chrome), silver plating (for electrical contacts requiring maximum conductivity), zinc/chromate, chemical blackening, and clear lacquer. All plating is performed post-machining with post-plating thread gauge check.

Q8: Can you machine complex multi-axis features on brass turned parts?

Yes. Our CNC turning centres with live tooling (milling, drilling, tapping, slotting axes) machine multiple features in a single setup: turned OD and ID features, cross-drilled holes at any angle, milled hex and square features, slot and keyway milling, and thread milling — all without rechucking. This eliminates cumulative setup datum errors and reduces lead time. Complex brass turned-and-milled parts are a specialty.

Q9: Do you offer sampling and first article inspection for brass CNC turned parts?

Yes. First Article Inspection (FAIR) with full dimensional report is standard for all new brass turned part programs. PPAP Level 3 documentation (including process flow, FMEA, control plan, measurement system analysis, and initial capability studies) is available for automotive and industrial OEM customers. Sample quantities of 10–25 pieces are produced before series production approval. FAI reports are provided in PDF or Excel format per customer template.

Q10: What is the minimum order and lead time for brass CNC turned parts?

Minimum order: 100 pieces for standard turned parts; 50 pieces for complex multi-axis parts; 10–25 pieces for first article/prototype. Production lead time: 2–4 weeks for standard turned parts; 3–5 weeks for complex multi-axis parts requiring special tooling or fixtures. Repeat production orders for established part numbers: 1–3 weeks. Expedited production of simple turned parts in 5–7 working days for critical requirements.