Material
Brass Machining & Custom Parts
Precision Machining India supplies OEMs and procurement teams worldwide with brass Machined Parts, made in our ISO 9001:2015 certified CNC machining plant in Pune, India.
ISO 9001:2015 Certified
Documented quality management system
Mitutoyo Quality Inspection
Calipers, micrometers, height gauge, DTIs
Export-Ready Packaging
VCI film, ISPM-15 wooden crates
RFQ Response in 24 Hours
Quote within one working day
NDA Available
Your drawings stay confidential
On this page15 sections
Direct answer
Which brass grades do you machine?
Yes. Precision Machining India machines brass parts to customer drawings at its ISO 9001:2015 certified plant in Pune, India, in CZ121 / C36000 free-cutting, CW614N, naval brass. Work is turned on CNC turning centres and milled on a 3-axis VMC with a 800 × 500 × 400 mm bed, holding ±0.01 mm typical. Grades are stocked or sourced against your specification, and EN 10204 3.1 mill certificates are supplied on request. Quantities run from a single prototype to 10,000+ pieces with no fixed minimum, and RFQs are answered within 24 hours.
- Grades: CZ121 / C36000 free-cutting, CW614N, naval brass
- Tolerance: ±0.01 mm typical
- Finishes: As-machined, nickel plating, tin plating (partner)
- Typical parts: hydraulic fittings, connectors, valve parts and inserts
- Quantities: single prototype to 10,000+ pieces, no fixed minimum order
- Documents: dimensional inspection report with the shipment, EN 10204 3.1 mill certificate on request
At a glance
Materials & technical specifications
Brass machining notes: Very fast cycle times with excellent surface finish; ideal for high-volume turned parts.
- Process
- Brass Machining
- Materials
- Brass
- Grades
- CZ121 / C36000 free-cutting, CW614N, naval brass
- Key properties
- Free machining, corrosion resistant, good electrical conductivity, attractive finish.
- Standard tolerance
- ±0.01 mm typical
- Surface finish
- As-machined, nickel plating, tin plating (partner)
- Max turning size
- Ø400 × 1200 mm (conventional), bar work on CNC lathes
- Max milling envelope
- 800 × 500 × 400 mm (VMC)
- Threading
- M3–M32 auto tapping; metric, BSP, NPT, UNC/UNF
- Batch size
- 1 prototype to 10,000+ pieces
Brass Machined Parts: overview
Free-cutting brass fittings, connectors and turned parts. Free-machining brass (CZ121 / C36000) is turned at high speed for excellent finish and short cycle times.
Every order is programmed in VISI or Delcam CAM, machined on CNC turning centres and auto tapping machines, and inspected in our Mitutoyo quality lab before it is packed and shipped.
Brass Machining capability
Our brass machining cell handles single prototypes through repeat batches of tens of thousands. Typical work includes shafts, flanges, bushings, valve components, fittings and custom fasteners.
Before quoting, our engineers review your STEP, IGES or PDF drawing for machinability and suggest changes that reduce cost without affecting function.
- CNC turning centres (LMW, Jyoti, Ace Micromatics): Shafts, bushings, fittings, turned plastic parts
- Vertical machining centre (VMC) (Ace Micromatics, FANUC control): 3-axis milling, bed 800 × 500 × 400 mm
- Auto tapping machines (M3 to M32 capacity): High-volume internal threading
- Conventional lathe (Uma Enterprises): Turning up to Ø400 × 1200 mm
- Band saw (Rajlaxmi): Bar stock cutting and blank preparation
Tolerances & surface finish
Standard capability for this work is ±0.01 mm typical. Bores can be held to H7 and bearing seats to h6/g6 fits. Where your drawing calls for tighter limits, we agree the critical characteristics up front and record them on the inspection report.
As-machined finishes of Ra 1.6–3.2 µm suit most functional surfaces. For seals, bearing journals and sliding fits we run a fine finishing pass to reach Ra 0.8 µm.
Plating, anodising, passivation and heat treatment are arranged through qualified partners and re-inspected in-house before packing.
Quality inspection process
Our ISO 9001:2015 system covers incoming material, first-article inspection, in-process checks and final inspection. Records are kept for every batch so any part can be traced back to its material heat.
Every shipment includes a dimensional inspection report, with material test certificates (EN 10204 3.1) on request.
- Mitutoyo digital vernier calipers
- Mitutoyo height gauge
- Granite surface plate
- Mitutoyo outside micrometers
- Inside calipers and bore gauges
- Dial test indicators
Brass grades we machine
The grade decides cost, cycle time and how the part performs. Use these notes to confirm the designation before you release the drawing.
CZ121 / C36000
Free-cutting leaded brass
- Condition
- Half-hard drawn round and hexagon bar
- Key property
- The benchmark for machinability: short chips, fine finish, minimal tool wear
- Typical use
- Hydraulic and pneumatic fittings, connectors, threaded inserts
CW614N (CuZn39Pb3)
EN designation for the same leaded family
- Condition
- Drawn rod and bar
- Key property
- Machines and performs like CZ121; quote this number when your drawing calls out EN grades
- Typical use
- Turned fittings, valve bodies and electrical components
Naval brass
Tin-bearing brass for seawater
- Condition
- Drawn or extruded bar
- Key property
- About 1% tin resists dezincification in salt water; cuts more slowly than free-cutting brass
- Typical use
- Marine fittings, pump and valve parts in salt water
Choosing between stainless steel and brass
Buyers usually weigh brass against stainless steel. Here is how the two compare on the points that decide the order.
| Criterion | Stainless Steel Corrosion resistance and strength in one material | Brass Fastest cycle times, sound in water and air |
|---|---|---|
| Machinability and cycle time | Work-hardens if a tool rubs, so cuts are taken at moderate speed with rigid set-ups and a constant chip load. 303 cuts fastest, 316 slowest. | The easiest metal we machine. Free-cutting grades give short chips, a bright finish straight off the tool and the shortest cycle times in the shop. |
| Tolerance we hold | ±0.01 mm typical, ±0.005 mm on selected diameters | ±0.01 mm typical |
| Service temperature | Austenitic grades stay serviceable from cryogenic temperatures upwards and resist scaling in air to around 800 °C, though strength falls away above roughly 450 °C. | Used to about 200 °C. Leaded grades should not be loaded above that, and hot water can cause dezincification in ordinary brasses. |
| Corrosion and chemical resistance | Good general resistance to water, steam and foodstuffs; 316 adds molybdenum for chlorides and seawater. Reducing acids such as hydrochloric still attack it. | Reliable in air, fresh water, fuels and gas. Ammonia causes stress-corrosion cracking and chlorides attack it; naval brass resists seawater dezincification better. |
| Relative cost | Mid-range material cost with longer cycle times than brass or aluminium, so the machining share of the piece price is higher. | Higher material cost per kilogram than steel, offset by very short cutting times — often the cheapest option for small turned parts. |
Values are indicative figures from published grade data, given to guide specification rather than to qualify a design; confirm them against the mill or polymer data sheet for your service conditions. Material selection remains your design responsibility. Grades are stocked or sourced per order, with EN 10204 3.1 certificates on request.
Industries we serve
This work is used across hydraulics, pumps & valves, electronics & electrical and general engineering. Hydraulics customers, for example, need leak-free sealing surfaces, accurate threads and high-pressure-rated geometry.
Our core customers are corporate OEMs in automotive, hydraulics, pumps & valves and general engineering, plus multinational companies that need PTFE, Nylon, Delrin and PEEK parts machined to drawing.
Export packaging & logistics
We export to 45+ countries from Nhava Sheva (JNPT), with sea transit of about 4–7 days to the Gulf, 18–28 days to Europe and the UK, and 25–35 days to North America. Air freight is available for urgent orders.
All parts are protected with VCI film and packed in ISPM-15 crates. We quote EXW, FOB or CIF to suit your logistics.
Why choose an Indian machining partner
India has become a leading China+1 destination for precision machined components. For international buyers, we combine competitive piece prices with an ISO 9001:2015 quality system, English-speaking engineers and drawings worked to ISO, DIN and ASME standards.
We reply to RFQs within 24 hours, sign NDAs before receiving drawings, and give you one point of contact from quote to delivery.
- ISO 9001:2015 certified
- Mitutoyo quality inspection
- Export-ready packaging
- RFQ response in 24 hours
- NDA available
Specifying brass on your drawing
Most re-quotes on brass parts come from a missing grade, condition or datum rather than from the geometry.
Put this on the drawing
- State the grade and its condition — CZ121 / C36000, annealed or hardened and tempered — not simply "brass".
- Put ISO 286 fits only on the functional diameters and bores (h6, g6, H7) and leave the rest to ISO 2768-m.
- Give Ra values where they matter: Ra 0.8 µm on bearing and sealing surfaces, as-machined Ra 1.6–3.2 µm elsewhere.
- Mark the datums, and reference any runout or concentricity requirement to them.
- Ask for the EN 10204 3.1 mill certificate on the purchase order if the heat number has to be recorded at goods-in.
- Say whether plating, anodising, passivation or heat treatment is required, and whether the dimensions apply before or after it.
What causes scrap, delay or extra cost
- A blanket ±0.01 mm on every dimension: it loads inspection time onto features that do not need it.
- Hardness or a heat-treated condition with no stated verification method. Heat treatment is done by partners and covered by their certificate; there is no in-house hardness testing.
- Leaving the grade to the supplier. A free-machining grade cuts cost but is not interchangeable with a corrosion-resistant one.
- Sharp internal corners at pocket walls and shoulder roots — give a radius or call out an undercut.
- Thin walls and long unsupported lengths that distort; tell us the free length so steadies and centres can be planned.
- Reports from a CMM. Inspection here uses Mitutoyo micrometers, bore gauges, a height gauge and dial test indicators on a granite surface plate.
How to order
Getting a quote for brass Machined Parts is simple:
- Send your drawing (PDF) and 3D model (STEP or IGES) with material, quantity and destination.
- Our engineers review it and send a quote with lead time within 24 hours.
- Approve samples or a first-article report for new parts.
- We machine, inspect, pack and ship with full export documents.
Brass parts: what decides cost and performance
Properties quoted here are those of the material as supplied. Pressure ratings and application approval stay with your own design and qualification process.
Tolerance and fit
Standard capability on brass is ±0.01 mm typical. Bores are held to H7 and bearing seats to h6 or g6; tighter limits are agreed feature by feature.
Service temperature
Used to about 200 °C. Leaded grades should not be loaded above that, and hot water can cause dezincification in ordinary brasses.
Corrosion resistance
Reliable in air, fresh water, fuels and gas. Ammonia causes stress-corrosion cracking and chlorides attack it; naval brass resists seawater dezincification better.
Machinability and price
Higher material cost per kilogram than steel, offset by very short cutting times — often the cheapest option for small turned parts.
Traceability
Bar is cut on the band saw and identified with its heat number, so each batch can be traced to its mill certificate. EN 10204 3.1 certificates come from the mill on request.
Surface treatment
As-machined, nickel plating, tin plating (partner). Partner processing is re-inspected here before packing, and parts leave in VCI anti-rust film inside ISPM-15 heat-treated crates.
Frequently asked questions
Get a quote in 24hWhat tolerances can you hold for brass Machined Parts?
Standard capability is ±0.01 mm typical. Bores to H7 and shaft fits to h6/g6 are routine; tighter limits are agreed per drawing.
Are you ISO certified?
Yes. We are ISO 9001:2015 certified. We do not hold AS9100 or ISO 13485, but we work under customer quality plans and supply full inspection reports and material certificates.
What files do you need for a quote?
A PDF drawing with tolerances plus a STEP or IGES model is ideal. Include material, quantity, finish and destination. We reply within 24 hours.
What is your minimum order quantity?
There is no fixed MOQ. We machine single prototypes, low-volume batches and high-volume production runs.
Do you export?
Yes. We export to 45+ countries across North America, Europe, the Middle East, Africa, Asia-Pacific and Latin America.
Which Brass grades do you machine?
CZ121 / C36000 free-cutting, CW614N, naval brass. Other grades on request.
Keep exploring
Related capabilities, materials and markets
Everything below is machined in the same Pune plant to the same ISO 9001:2015 system. Follow whichever is closest to the part you are sourcing.
Request for quotation
Send your drawing. Get a quote in 24 hours.
Upload STEP, IGES or PDF files. NDA available on request. Quoting: Brass Machined Parts.