Automatic lathe machining of PCB drill bit bodies | PREC Việt Nam

PREC Vietnam offers CNC automatic lathe machining for PCB drill bit bodies and small shaft components. With machining capabilities for sizes under Φ30 mm, diverse materials, and mass production capacity, PREC meets customer drawing requirements for precision, concentricity, and stability.

The development of electronics, automotive, medical, and communication equipment is driving the demand for printed circuit board (PCB) manufacturing with increasingly higher component density. This leads to the requirement for smaller PCB drill bits, higher rotational speeds, and greater precision. To meet these demands, the PCB drill bit body also needs to be machined with near-absolute precision in terms of diameter, concentricity, and surface quality. This group of components requires precise turning technology along with the ability to maintain stable quality in mass production.

Requirements for Machining PCB Drill Bit Bodies

The PCB drill bit body is a small shaft-like component, often operating at high rotational speeds. Therefore, the machining process requires strict control over the following factors:

• Outer diameter precision.
• Roundness and straightness of the shaft body.
• Concentricity between diameter steps.
• Runout during rotation.
• Overall length and shoulder position.
• Surface roughness.
• Burrs at edges and cut-off points.
• Consistency among products within the same batch.

For mass production, the critical requirement is not only to achieve tolerance for each individual product but also to maintain stable quality throughout the machining process.

PREC Vietnam's Machining Capabilities for PCB Drill Bit Bodies

Machinery System

PREC Vietnam utilizes CNC automatic lathe systems from Citizen and Tsugami for continuous machining from bar stock. Multiple operations can be performed in a single cycle, including:

• Facing.
• Outer diameter turning.
• Multi-step shaft machining.
• Grooving.
• Chamfering.
• Shaft shoulder machining.
• Drilling or hole machining.
• Back machining.
• Parting off.

Integrating multiple operations on the same machine helps reduce the number of setups, limit accumulated errors, and maintain component concentricity.

Machining Dimensions

PREC Vietnam accepts turning components with dimensions under Φ30 mm. This range applies to various types of rotational parts, from simple to complex shapes.

Machining Materials

Depending on the material, shape, and tolerance, PREC selects appropriate cutting tools, cutting conditions, and machining programs to ensure product stability. PREC Vietnam accepts machining for the following main material groups:

Production Volume

PREC has the capability to meet large production batches, depending on the material, shape, and complexity of the product. Automatic bar-fed lathes are suitable for medium to large volume products due to their continuous feeding and machining capabilities. PREC proactively:

• Develops machining programs.
• Arranges cutting tools.
• Optimizes operation sequences.
• Shortens production cycles.
• Operates multiple machines simultaneously.
• Monitors progress according to delivery schedules.

Quality Control

To maintain stability in mass production, PREC implements a periodic inspection process every 2 hours throughout the machining process. Critical dimensions according to drawings are 100% inspected, especially for features with tight tolerances or complex measurement requirements. If deviations are found, PREC will inspect all products machined during that period to completely remove non-conforming products before shipment. In addition to in-process control, PREC also uses microscopes, vision measuring systems, roundness measuring machines, and surface roughness testers to verify product dimensional and surface quality requirements.

Typical Applications

In addition to PCB drill bit bodies, PREC Vietnam can also machine:

• Cutting tool holders.
• Multi-step small shafts.
• Dowel pins.
• Straight pins.
• Taper pins.
• Connector pins.
• Contact pins.
• Terminals.
• Small bushings and sleeves.
• Small drive shafts.
• Precision mechanical components.
• Components used in electronic, communication, and medical devices.

The ability to machine various component groups helps PREC meet projects requiring small shaft-type products with diverse shapes and applications.

PREC Vietnam offers CNC automatic lathe machining for PCB drill bit bodies and various small shaft components. Key capabilities include:

• Machining components with dimensions under Φ30 mm.
• Citizen and Tsugami CNC automatic lathe systems.
• Machining aluminum, stainless steel, steel, and copper.
• Capable of handling from prototyping to mass production.
• Machining various types of shafts, pins, dowels, and rotational parts.
• Controlling concentricity, runout, roundness, and roughness according to drawings.
• Measurement and inspection systems for precision component manufacturing.

Customers requiring machining for PCB drill bit bodies, tool holders, or small shaft components can send drawings, material specifications, tolerances, and estimated production volumes for PREC Vietnam to evaluate suitable machining solutions.