twentyfour26StatsBlogGet a quotetwentyfour26 offers C360 brass CNC machining on request, with STEP-file review and accepted parts cut in our own San Francisco shop.
Send the geometry, brass grade, and requirements that control the fit. We review the part against our defined machining cell before planning the work.
Machining and inspection by the twentyfour26 team, in our own shop. Meet Hemant and Sam.
A brass component may need a concentric bore, a shoulder that seats against a housing, flats for a wrench, or a thread that engages a purchased component. Those features determine the machining approach. A STEP model shows their relationship; a drawing identifies the dimensions, surfaces, and fits that need deliberate control.
Our CNC processes include milling and turning. Milling suits pockets, flats, profiles, and holes positioned around a part. Turning suits geometry organized around a rotating axis, such as diameters, shoulders, and bores. A component with both kinds of features can need more than one setup. Send the complete geometry so the review can account for how it will be held and accessed.
C360 brass is an on-request material, while 6061-T6 aluminum is stocked. For brass, start with the current model and the specified alloy. The review connects that request to stock, tools, workholding, and inspection rather than treating every brass design as the same job.
Custom brass parts often earn their place through a small number of functional surfaces. For a spacer, the length and end faces control the assembly stack. For a bushing, the bore, outside diameter, and shoulder establish how it locates. A threaded adapter needs the thread designation and the surface that stops or seals the connection.
Use these as design examples, then describe your own component’s job. A hole that merely clears a screw needs a different requirement from a bore that locates a shaft. Calling both “tight tolerance” conceals the difference. Identify the mating component, intended clearance or interference, and the datum relationship that matters.
Consider the part after cutting, too. An accessible edge may need deburring so it can be handled; a visible face may need an appearance requirement; an internal passage may need a cleanliness note. Put these requirements on the drawing when they affect use. They belong in the review before the setup and inspection plan are settled.
For an early mechanism or assembly check, our prototype machining page explains the broader part-review process. The brass request should keep the alloy and its functional interfaces explicit.
C360, also written C36000, is free-cutting brass. Its machinability makes it useful for detailed components, including threaded features and bores. Mueller Brass identifies C36000 as a free-cutting alloy with excellent machinability. That describes the material, not a promise about every finished part.
C360 contains lead. A lead-free requirement is a material-selection decision to resolve before ordering, rather than a finish or inspection note added afterward. State any material restriction, product requirement, or required documentation alongside the alloy callout. Do not replace a specified grade with a visually similar brass.
The part’s environment matters as much as the ease of cutting it. Contact with another metal, exposure to a fluid, operating temperature, and a forming operation can all affect the alloy decision. If the grade has already been chosen for those conditions, carry that designation into the machining brief. If you are comparing materials, identify the condition the part must withstand.
Our C360 brass material guide covers the alloy choice in more detail. This service starts where that choice meets a real component: its model, drawing, and machining requirements.
Our standard tolerance is ±0.005 inches, or ±0.13 mm. With drawing review, we can plan tolerances down to ±0.001 inches when the geometry and inspection requirements support them. Specify the actual requirement on the relevant feature; do not assume a tighter figure applies to the entire component.
A diameter tolerance does not describe every aspect of a fit. A bore’s relationship to a shoulder, the spacing of locating holes, or the parallelism of two faces may decide whether the assembly works. Mark the datums and geometric requirements where they are necessary. Leave noncritical geometry at an appropriate standard requirement.
Tool access and support also shape the result. A deep narrow pocket needs a cutter that reaches its floor. A thin flange needs support while neighboring material is removed. A feature on the opposite face can require the part to be relocated. Show the complete part rather than cropping the model to the feature you care about.
Surface finish is a separate requirement. Name the face and finish needed, and identify any downstream coating or plating requirement before machining. Its thickness can affect a fit. Include it for review rather than assuming a finishing operation is included in the machining request.
The CNC machining tolerance guide helps distinguish a size limit from a relationship between features. For threads, use the size, pitch or series, and usable engagement described in our thread-callout guide.
Keep the model and drawing at the same revision. If you change a bore diameter in CAD, update the drawing before sending both. When two alternatives are under consideration, give each a distinct revision or filename and say which one is the machining request.
Quantity, setups, stock, cutting time, and inspection work all shape the quote. A simple spacer and a pocketed housing can involve very different work even when their overall size is similar. Send the quantity and complete geometry together so the review has a meaningful basis. If timing is critical, include the required date at the first handoff so it can be considered alongside the part.
Upload a brass partIt is cutting brass stock to a programmed shape using machining operations such as milling or turning. A cast or forged blank may also need machining, but those starting processes are different from cutting a part directly from stock.
No. C36000 is free-cutting brass. Cartridge brass is a different alloy designation, commonly C26000. Keep the specified grade on the drawing rather than substituting a brass with a similar color.
Make the component you want reviewed identifiable. If the assembly explains a fit, include that context and identify the mating part; the machining request should still state which individual component and revision you need.
Describe the interface it establishes and include the relevant drawing or measured requirements. A reference part can explain a fit, but the STEP model and requirements should identify the geometry you want made, including any intentional change from the reference.