CNC Machining Service
C360 Free-Cutting Brass CNC Machining
C360 is one of the most machinable brass alloys we run, and most of our brass work is turned. We machine C360 parts from customer drawings on CNC lathes, automatic lathes, Swiss-type lathes and turn-mill machines, with inspection to the tolerances on the drawing.
If your brass part must hold tight diameters, clean threads or repeatable features across a production run, send us the drawing and we will review it before quoting.
- Listed Precision
- ±0.01 mm
- on many Swiss-type and CNC turned features
- Machine Capacity
- 100+ machines
- lathes, turn-mills, milling centers and screw machines
- Inspection
- CMM + optical
- reports and first-article data on request
How C360 Behaves on the Machine
C360 cuts with short, broken chips and low cutting force, which lets us run higher spindle speeds and feed rates than most other copper alloys. That means shorter cycle times, better surface finish on turned diameters and less tool wear on small-diameter work. It also suits parts with many small features, such as cross-drilled holes, fine grooves and threaded sections.
The trade-off is that C360 contains lead, and its ductility is lower than that of alloys like C260 or C110. Thin walls and long slender sections can move under cutting load, so we check fixturing and support early, especially on Swiss-type work where the part is guided close to the cutting tool.
Machining Processes for C360 Parts
Process selection depends on part geometry, diameter range and annual volume. We do not default every brass part to one machine.
| Process | Equipment | Typical C360 Parts | Listed Precision |
|---|---|---|---|
| Automatic turning | 30 automatic lathes | Pins, small turned fittings, precision connectors | ±0.02 mm |
| Swiss-type turning | 10 Swiss-type lathes (4 five-axis, 2 six-axis, 4 other) | Slender pins, small-diameter bushings, miniature components | ±0.01 mm |
| CNC turning | 43 CNC lathes, 7 gang-type lathes | Shafts, sleeves, bushings, collars | ±0.01 mm |
| Turn-mill machining | 15 CNC turn-mill machines | Parts with cross holes, flats or off-axis features in one setup | ±0.01 mm |
| CNC milling | 25 three-axis, 1 four-axis, 8 five-axis machining centers | Brackets, flats, slotted parts, multi-face components | ±0.01 mm |
| Screw machining | 20 screw machines | Screws, threaded fasteners | ±0.05 mm |
For high-volume turned parts, Swiss-type and automatic turning usually give the most stable cost per piece. For lower volumes or parts with features on several faces, turn-mill and milling setups often reduce handling and fixture changes.
Inspection and Tolerance Control
Brass parts are often used in assemblies where a few hundredths of a millimeter change the fit. We set the inspection plan from the drawing. Critical features are measured on the CMM or optical system and recorded; general dimensions are checked with calipers, micrometers or gauges at the frequency agreed for the order.
Inspection reports and first-article data can be provided on request.
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3D Dimensional Checks
Coordinate measuring machine for dimensional and geometric verification.
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Optical Profiling
Five 2D optical systems for profiles, hole positions and small features.
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Concentricity and Finish
Concentricity instrument for turned components and surface roughness tester for finish verification.
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Hardness and Gauging
Rockwell hardness testing, thread ring and plug gauges from M1.0 to M16, pin gauges, micrometers and height gauges.
Deciding Whether C360 Fits Your Part
C360 is usually the right choice when the part is turned or small-featured, needs good machinability at production volume, and does not have to be formed or exposed to harsh corrosive conditions. It is widely used for connectors, valve components, fittings and instrument parts.
C260 or C270 brass
Better if the part must be bent, formed or deep-drawn after machining, or if a lead-free composition is preferred for that operation.
C110 copper
Preferred when electrical or thermal conductivity is the main requirement.
Stainless steel
Suitable when strength, wear resistance or corrosion performance in aggressive environments is critical.
Aluminum
Suitable when weight is the main concern and the part does not need the wear or electrical properties of brass.
Lead content matters for some markets and applications. If your product must comply with RoHS, drinking-water rules or customer-specific substance restrictions, tell us before ordering. We can discuss material options and provide material documentation based on what your project requires.
Typical C360 Parts We Machine
If your part is not on this list but is made from brass and turned or milled, send the drawing anyway. We will confirm which process we would use and flag any manufacturability issues.
- Turned pins, shafts and spacers
- Threaded bushings and fittings
- Connector bodies and contact housings
- Valve stems, nozzles and small hydraulic or pneumatic components
- Instrument parts and miniature turned components
- Brackets and housings with milled features
- Screws and threaded fasteners on screw machines
Information That Speeds Up Your Quotation
To give you an accurate quote quickly, please send the items below. We review every drawing for machinability, tolerance risk and inspection needs, and we will explain any feature that adds cost or risk, such as a thin wall, tight concentricity or deep hole.
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1
Drawings and model
2D drawing and 3D model (STEP or equivalent).
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2
Material specification
For example C360 or UNS C36000, plus any required certificates.
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3
Tolerances and finish
Critical tolerances, GD&T callouts and surface finish requirements.
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4
Volume
Annual volume and order quantities, including prototype and production runs.
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5
Finishing
Plating, passivation or other finishing requirements.
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6
Delivery and packaging
Target delivery date and any packaging or labeling requirements.
Quality Systems
YJCNC operates under quality management systems certified to ISO 9001, ISO 13485, AS9100D, ISO 14001 and IATF 16949. Certification scope applies to specific processes and sites, so please confirm the scope relevant to your project when you request a quote.
Supplier qualification support
Quality records and inspection data can support supplier qualification and audit requirements.
Frequently Asked Questions
Our CNC and Swiss-type lathes list ±0.01 mm for many turned features. Achievable tolerance depends on part geometry, material condition and inspection requirements, so we confirm it during drawing review.
Yes. We run prototype orders, repeat orders and production runs, and we can use the same process plan to keep prototype and production parts consistent.
We can provide material documentation as required by the project. Please specify the certificate type when you send your request.
Usually not. C360 has lower ductility than C260. If the part needs significant forming, we recommend discussing a different alloy before machining begins.
Request a Quotation for C360 Machining
Send your drawing, material requirements and quantities to info@yjcncmachining.com, or visit us at Yabian Community, Shajing Street, Baoan District, Shenzhen, China. We will review the part, confirm the process and inspection plan, and return a quotation with any manufacturability notes.
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