CNC Machine For Brass Parts: Custom Brass Threaded Inserts

Brass threaded inserts provide a metal thread for fastening plastic components. They are used in assemblies where screws need a defined threaded interface, particularly when the design requires repeated fastening or a more suitable alternative to threads formed directly in plastic.

 

Deep Mould manufactures custom brass threaded inserts based on customer drawings and specifications. In addition to mold tooling and plastic injection molding, our services include machining for custom metal components. For projects involving both plastic parts and metal inserts, we can review the relevant drawings to help clarify their dimensional and assembly requirements.

 

When choosing a supplier for CNC-machined brass parts, buyers need to consider more than the machining process. Thread accuracy, outer geometry, dimensional tolerances, and compatibility with the plastic component all affect the final assembly.

 

Brass Insert Design and Specifications

The insert shown in this product range features an internal thread, a knurled outer surface, and a longitudinal slot. Each feature serves a specific design purpose, so the final dimensions should follow the approved drawing.

 

Internal thread

The internal thread must match the specified fastener. Thread size, pitch, and applicable tolerance should be confirmed before production. For example, M4 × 0.7 may be suitable for some assemblies, but the actual specification depends on the customer's design.

 

Knurled outer surface

The knurled profile helps the insert engage with the surrounding plastic, depending on the installation method and part geometry. Its diameter, pattern, and length should therefore be defined in the drawing rather than selected independently of the plastic boss.

 

Longitudinal slot

A slot along the insert body may form part of the required design. Its width, depth, and position need to match the drawing, along with any requirements for the ends or edges.

 

Dimensions and tolerances

Outer diameter, overall length, and other critical dimensions determine how the insert fits into the assembly. Identifying these dimensions early helps the supplier plan the machining and inspection requirements.

 

 

Information Needed for a CNC Machining Quote

A clear drawing gives the supplier a better understanding of the part and helps avoid unnecessary clarification during quotation.

 

Drawings and Thread Requirements

Provide a 2D drawing or 3D CAD file showing the overall geometry, internal thread, outer diameter, length, knurl dimensions, and slot details. Include the tolerances for critical features and identify any dimensions that directly affect assembly.

 

If the insert will be installed in an injection-molded plastic part, the plastic boss drawing is also useful. Reviewing both components helps clarify the required fit and installation conditions.

 

Material and Installation Method

Brass is often selected for machined inserts because it is readily machinable and suitable for many fastening applications. However, the required brass grade should reflect the part's operating environment and mechanical requirements.

 

The installation method also matters. Heat installation, for example, creates different interface conditions from other installation methods. Providing this information helps the supplier understand how the insert will interact with the surrounding plastic.

 

Inspection Requirements

Inspection criteria should follow the approved drawing and order specifications. Depending on the design, checks may cover internal threads, outside diameter, overall length, slot dimensions, and visible burrs.

 

If the finished assembly must meet a specified pull-out force or torque requirement, define the test method and acceptance criteria separately. Dimensional inspection by itself cannot confirm retention performance in the completed plastic assembly.

 

Custom CNC-Machined Brass Parts from Deep Mould

Deep Mould supports custom metal component machining alongside mold tooling and plastic injection molding. This combination is useful for projects that require threaded inserts and matching plastic components.

 

We review customer drawings, material specifications, tolerances, and order quantities to understand the manufacturing requirements. Depending on the design, the project may begin with samples before moving to a larger production batch.

 

Our machining services also cover custom components made from materials such as steel, zinc, and aluminum. The appropriate process and inspection plan depend on the material, geometry, and required dimensions of each part.

 

For buyers sourcing custom CNC-machined brass parts, providing complete technical information at the quotation stage helps establish the scope of work and identify any details that need clarification before production.

 

Contact Deep Mould to request a quotation for CNC-machined brass inserts and related custom components.