S-4000 Axial Insertion Machine for THT Automation by Southern Machinery

Manual axial insertion is still one of the most common bottlenecks in mixed SMT/THT PCB assembly. Resistors, diodes, and similar taped axial components look simple, but manual insertion creates uneven output, operator fatigue, missed parts, bent leads, and unstable downstream soldering.

The S-4000 Axial Insertion Machine by Southern Machinery is designed to turn that manual THT process into a controlled, repeatable, inline-ready production step. It is especially relevant for EMS, ODM, automotive electronics, industrial control, LED driver, power supply, and appliance electronics factories that need better THT capacity without overbuilding the whole line.

What is this machine used for?

The S-4000 is used to automatically insert taped axial through-hole components into PCBs. Typical parts include axial resistors, diodes, and similar components supplied in taped format. The machine feeds the component, controls the insertion process, and can support automatic lead cut and clinch depending on the final configuration.

In simple terms: if your operators are spending shift after shift inserting axial parts by hand before wave soldering or selective soldering, this machine is built to remove that bottleneck.

Where It Fits in a Complete PCB Assembly Line

The S-4000 is not just a standalone machine. In a practical Southern Machinery line, it can be connected into a complete SMT + THT production flow:

1. SMT section: magazine loader, stencil printer, pick-and-place, reflow oven, and optional AOI or SPI.
2. THT preparation: PCB loader, conveyor, buffer, and axial insertion with the S-4000.
3. Other THT insertion: radial insertion, odd-form insertion, or manual assist stations when the BOM includes capacitors, connectors, transformers, relays, or other special parts.
4. Soldering: wave soldering or selective soldering, depending on PCB design and component mix.
5. Inspection and test: post-solder AOI, visual inspection, ICT, FCT, and NG/OK handling if required.

Typical Applications

The S-4000 is a strong fit when the product has repeatable axial THT content and the factory wants stable output per shift. Common scenarios include:

• Power supply boards with many axial resistors and diodes.
• LED driver and lighting control boards.
• Industrial control PCBs with mixed SMT and THT processes.
• Automotive electronics boards where repeatable insertion quality matters.
• Appliance and consumer electronics control boards.
• EMS factories trying to reduce manual THT labor dependency.

A real-life example: a factory may have a modern SMT line but still use several manual operators to insert axial components before wave soldering. SMT output is predictable, but THT becomes the pacing step. An axial insertion machine helps make the THT section more predictable so the whole line can be planned around stable takt time.

Key Production Value

1. Less Manual Labor Pressure

The source document describes a typical automation impact equivalent to the output of 4-6 operators, depending on component mix and takt time. This should be treated as an example only, because actual labor reduction depends on the PCB, BOM, working method, and confirmed machine configuration.

2. More Repeatable Lead Forming and Clinching

Controlled insertion and robust clinching help standardize lead forming and part retention before soldering. That matters because wave soldering and selective soldering quality are affected by how consistently the leads are inserted and held.

3. Better THT Flow

Loader and conveyor-ready integration reduce manual board handling, waiting time, and WIP accumulation. This makes the S-4000 useful for factories moving from island-style manual workcells toward smart EMS production.

4. Practical ROI Instead of Over-Automation

For a factory with only a few axial parts per board and very low volume, a fully automatic axial inserter may be more than needed. But if axial insertion consumes several operators or causes unstable output, automating this step can be one of the fastest ways to improve THT throughput.

Technical Selection Checklist

Before Southern Machinery confirms the best S-4000 configuration, the engineering team should check these items:

| Selection Item | What to Confirm | Why It Matters |

|---|---|---|

| Axial BOM | Resistors, diodes, similar taped components | Confirms feeder and insertion suitability |

| Component packaging | Tape format, pitch, lead condition | Affects feeding stability |

| PCB size | Source document notes approx. up to ~450 x 350 mm, subject to configuration confirmation | Confirms board handling and fixture requirements |

| PCB thickness and panelization | Board thickness, panel design, tooling holes | Affects support and insertion stability |

| Throughput target | Source document notes up to ~20,000 components/hour, program and part dependent | Confirms whether one machine meets the takt time |

| Lead cut and clinch | Automatic lead cut and clinch, configuration dependent | Supports retention and downstream soldering quality |

| Line connection | Loader, inloader, conveyors, buffers | Reduces handling and improves OEE |

| Utilities | Source document notes typical AC 220V and compressed air around 0.5-0.7 MPa | Must be confirmed before installation |

All values above are based on the selected source document and should be verified against the customer BOM, PCB drawing, and final Southern Machinery technical confirmation.

How to Connect S-4000 with Wave Soldering

For many THT boards, the flow is straightforward:

1. SMT assembly is completed first.
2. PCBs enter the THT insertion area.
3. The S-4000 inserts axial taped parts.
4. Radial insertion, odd-form insertion, or manual assist handles non-axial components.
5. Boards move to wave soldering or selective soldering.
6. AOI, visual inspection, ICT, or FCT verifies the assembly.

Southern Machinery can design the full line around this flow, including loaders, unloaders, conveyors, buffers, PCB handling direction, and soldering equipment. This is important because buying only one machine without checking line balance can move the bottleneck somewhere else.

Why Choose Southern Machinery

Southern Machinery was founded in 2011 in Shenzhen, China and focuses on high-efficiency, cost-effective SMT/THT PCB assembly automation equipment. The company supports more than 237 global customers and can provide a complete solution from SMT line equipment to THT insertion, wave soldering, board handling, and inspection options.

For overseas factories, the practical value is not only the machine price. It is also line design support, installation guidance, operator training, spare parts support, and remote service after delivery.

FAQ

Is the S-4000 only for resistors?

No. The source document positions it for taped axial components such as resistors, diodes, and similar axial parts. Final compatibility depends on the component package, tape format, lead condition, and PCB design.

Can it replace all manual THT insertion?

No. It targets axial taped components. If your board also has radial capacitors, terminals, connectors, transformers, relays, or odd-form parts, Southern Machinery can combine axial insertion with radial insertion, odd-form insertion, manual assist, wave soldering, and board handling.

What throughput should I expect?

The source document notes up to approximately 20,000 components per hour, but this is program and part dependent. Southern Machinery should confirm the realistic rate after reviewing your BOM, PCB drawing, insertion sequence, and handling method.

Does it support inline production?

Yes, the source document describes loader and conveyor-ready integration. Southern Machinery can configure loaders, conveyors, buffers, and downstream soldering connection based on your factory layout.

Is this machine suitable for low-volume production?

It depends. For prototype or very low-volume work, manual insertion may still be more cost-effective. For medium or high-volume production where axial insertion consumes several operators or creates unstable output, automation is usually easier to justify.

What information is needed for a quotation?

Share your PCB size, panel drawing, axial component BOM, target boards per shift, current manual labor count, soldering process, and preferred automation level. With that information, Southern Machinery can recommend the right machine configuration and full-line layout.

CTA: Build a More Stable THT Line

If axial insertion is slowing down your PCB assembly line, send Southern Machinery your PCB drawing and axial BOM. We can match the S-4000 configuration, check line balance, and design a cost-effective complete solution covering SMT, THT insertion, wave soldering, board handling, inspection, training, and spare parts support.