Precision Brass CNC Turned Parts for Communication Equipment

Small turned parts are not always simple parts.

This custom brass CNC turned component is manufactured for communication equipment and supplied to a customer in the United States. The part is approximately 40 × 10 mm, with critical dimensions specified to ±0.01 mm and a typical production quantity of around 6,000 pieces per batch.

Its geometry combines a slender stepped shaft, several diameter transitions and a larger cylindrical end with a transverse hole. Most of the profile is produced by precision turning, while the cross hole requires machining from another direction.

That combination makes CNC turn-mill machining a practical production method for this part.

Project Details

This is a made-to-drawing production component rather than a standard pin or shaft. The diameters, shoulders, hole feature and critical dimensions are produced according to the customer's engineering drawing.

A Slender Stepped Shaft Requires a Stable Turning Process

The part looks straightforward at first, but most of its machining challenge runs along the length of the shaft.

Several different diameters and shoulders are produced around the same rotational axis. The relatively slender center section also means that workholding, cutting force and machining sequence need to be considered carefully.

Excessive cutting force on a small-diameter section can affect dimensional stability or surface quality. The turning sequence therefore needs to balance efficient material removal with sufficient rigidity during machining.

This becomes more important in repeat production.

A setup that works for a few samples still needs to remain practical when the order increases to 6,000 pieces. For this type of precision CNC turning project, process stability matters as much as producing an accurate first part.

One Cross Hole Changes the Machining Route

Most features on this component are natural CNC lathe machining features: outside diameters, shoulders and end faces.

The transverse hole near the larger end is different.

Because it is perpendicular to the main turning axis, it requires another machining direction. Depending on the machine configuration and production plan, this feature can be completed using driven tooling or a coordinated secondary drilling/milling operation.

The important point is not simply whether the hole can be drilled.

Its position needs to remain consistent with the turned geometry defined on the drawing. For repeat production, the machining route also needs to avoid unnecessary handling and repositioning wherever practical.

This is why components that appear to be simple shafts can be better suited to CNC turning and milling or turn-mill machining.

Cross-Hole Burrs Need Attention Too

The transverse hole introduces another manufacturing detail: burr control.

When a drill breaks through a cylindrical surface, burrs can remain around the hole intersection. They may be small, but on a precision component they can affect handling, fit or assembly.

Deburring therefore forms part of the machining process rather than being treated as an afterthought.

The objective is to remove unwanted sharp edges while protecting the surrounding machined surfaces and functional geometry.

For thousands of brass turned parts, this seemingly minor operation also needs to be repeatable from one component to the next.

Controlling ±0.01 mm Critical Dimensions

Several key dimensions on this project are specified to ±0.01 mm.

We do not assume that every dimension requires the same tolerance. Production and inspection follow the customer's drawing, with closer attention given to the features identified as critical to fit or function.

Initial machined parts are checked before regular production proceeds. Selected dimensions are then measured during the production run to monitor dimensional stability and identify changes that may develop as tooling wears.

Our inspection workflow includes first-piece verification, in-process inspection and outgoing inspection, with measurement requirements determined by the drawing.

For a 6,000-piece batch, the objective is straightforward: the required dimensions need to remain controlled throughout production, not only on the approval samples.

Brass and Repeat Production

Brass is well suited to precision CNC machining because of its good machinability, chip behavior and ability to produce clean machined surfaces.

Those characteristics are useful for small shafts, pins, connectors and other turned components where efficient repeat production is required.

Good machinability, however, does not remove the need for production planning.

Tooling, workholding, cross-hole machining, deburring and inspection all contribute to the finished component and overall manufacturing cost.

For this project, the process is therefore planned around the complete batch rather than optimized only for the first few pieces.

CNC Turning Services for Made-to-Drawing Parts

YS Precision provides CNC turning services for custom metal and engineering plastic components manufactured from customer drawings.

Our turning capabilities include:

• Precision shafts and stepped shafts
• Pins and locating components
• Bushings and sleeves
• Threaded parts
• Brass connectors and fittings
• Small precision turned components
• Parts with cross holes or milled features
• CNC turn-mill components

Depending on the geometry, size and production quantity, we can use precision CNC turning, CNC lathe machining, Swiss-type CNC turning, turn-mill machining or secondary CNC milling.

Materials include brass, stainless steel, aluminum, copper, carbon steel and engineering plastics.

This allows the machining route to be selected around the actual component rather than treating every round part as a conventional lathe job.

From Drawing Review to Repeat Orders

For a new project, the most useful starting point is the customer's drawing.

Send us your 2D drawing and/or 3D model, together with the material, required quantity, critical tolerances and any surface or inspection requirements.

Our engineering team reviews the component before quotation, including the features that influence machining strategy.

For a part like this, that means looking at the stepped shaft geometry, critical diameters, cross-hole operation, deburring and inspection requirements—not just the overall 40 × 10 mm size.

For repeat orders, production follows the latest drawing revision and confirmed manufacturing requirements.

Looking for a CNC Turning Manufacturer?

If you are sourcing a CNC turning manufacturer or CNC turning supplier for custom production parts, YS Precision supports projects from prototypes and small batches to repeat orders of thousands of components.

We manufacture custom CNC turned parts for communication equipment, automation, industrial machinery and other engineering applications.

For an RFQ, send us:

• 2D drawing and/or 3D model
• Material and grade
• Required quantity
• Critical tolerances
• Surface requirements
• Inspection requirements, if applicable
• Estimated annual demand

We can review the component and recommend a suitable machining route based on the actual drawing and production requirements.

Send your drawings to YS Precision for a manufacturing review and quotation.