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

Manual axial component insertion remains a bottleneck in many EMS factories. Resistors, diodes, and similar taped axial parts may seem straightforward, but when operators insert them by hand across hundreds of boards per shift, the process becomes slow, inconsistent, and difficult to scale.

The S-4000 Axial Insertion Machine by Southern Machinery is purpose-built to solve this THT automation challenge. It moves axial insertion from manual workbenches into a controlled inline process, with loader/unloader options, conveyor-ready integration, and automatic lead cut and clinch depending on the final configuration.

Southern Machinery was founded in Shenzhen, China in 2011. We support over 237 global customers with SMT and THT PCB assembly automation equipment, including SMT lines, THT insertion, wave soldering, selective soldering, board handling, inspection, training, spare parts, and full-line integration.

What is this machine used for?

The S-4000 automatically inserts axial taped components into through-hole PCBs. Typical components include resistors, diodes, and similar axial-leaded parts supplied in tape format.

In practical factory terms, it is used when your team wants to:

Reduce manual insertion labor for repetitive axial parts
Improve lead forming and clinching consistency before soldering
Align THT output with the takt time of the SMT line
Connect axial insertion with loaders, conveyors, wave soldering, and inspection
Build a more repeatable process for EMS, ODM, industrial control, automotive electronics, power supply, and appliance electronics production

Why axial insertion becomes a bottleneck

Axial parts are often placed after SMT, before wave or selective soldering. If this process remains manual, several problems emerge:

Output depends heavily on operator skill and availability
Boards accumulate as WIP between SMT and soldering
Issues like wrong polarity, missed insertion, uneven lead forming, and handling damage become harder to control
Line balancing is challenging when SMT runs fast but THT insertion lags
Quality data is weaker because manual work is hard to standardize

The S-4000 is designed to make this step more predictable. The source page positions it as a smart THT automation platform that replaces slow manual axial insertion with stable feeding, controlled insertion, and repeatable clinching.

Key capability snapshot

Final specifications must be confirmed against your PCB drawing, axial BOM, tape format, and selected options. Based on the source document, typical capabilities include:

| Item | Typical capability from source document | Buyer value |

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

| Insertion throughput | Up to about 20,000 components/hour, depending on program and parts | Helps shift axial insertion from manual bottleneck to predictable takt time |

| Component format | Axial taped components such as resistors and diodes | Standard feeding reduces manual handling and risk of missed insertion |

| Lead forming / clinching | Automatic lead cut and clinch, configuration dependent | Supports better retention before wave or selective soldering |

| PCB size support | Approx. up to 450 x 350 mm, subject to final configuration | Covers many common EMS panel sizes |

| Inline integration | Loader/unloader options and conveyor-ready interfaces | Reduces board handling and WIP accumulation |

| Utilities | AC 220V typical, compressed air around 0.5-0.7 MPa typical | Fits common EMS factory infrastructure |

These values are typical and subject to final technical confirmation. For a formal offer, Southern Machinery should review the PCB drawing, component pitch, body size, tape specification, target output, and preferred line layout.

How it fits into a complete PCB assembly line

A strong automation decision considers more than just one machine. The S-4000 should be evaluated as part of the full PCB assembly flow.

A practical line architecture may look like this:

SMT line: loader, stencil printer, pick-and-place, reflow oven, and AOI if required
THT preparation: PCB buffer or conveyor after SMT inspection
Axial insertion: S-4000 with the required feeder and clinching setup
Additional THT insertion: radial inserter, odd-form insertion machine, or manual assist station if the product mix requires it
Soldering: wave soldering or selective soldering depending on board design and component restrictions
Inspection and test: post-solder AOI, visual inspection, ICT/FCT, and NG/OK handling as needed
Board handling: loaders, unloaders, conveyors, inverters, buffers, and traceability stations as required

For example, a factory building power supply boards may use SMT for chip components, the S-4000 for axial resistors and diodes, a radial insertion machine for capacitors, and wave soldering for the final THT solder process. This eliminates several manual insertion steps without requiring the buyer to automate every odd-form part immediately.

Typical applications

The S-4000 is most relevant for manufacturers with repeatable axial THT content, especially where manual insertion limits output or quality consistency.

Typical application areas include:

Power supplies and LED drivers
Industrial control boards
Automotive electronics modules
Appliance control boards
Consumer electronics with mixed SMT and THT assembly
EMS factories handling high-volume or stable-repeat production
ODM factories transitioning from manual THT to smart line integration

For high-mix, low-volume production, the business case should be carefully evaluated. Automation can still make sense if the same axial component families repeat across products, but feeder setup, changeover time, and BOM variety must be reviewed honestly.

ROI, quality, and capacity value

The source page highlights the S-4000 as a way to reduce manual staffing pressure and improve line stability. In buyer language, the value comes from four areas.

1. Labor reduction

A configured axial insertion cell can replace a manual workcell output in many production scenarios. The exact labor impact depends on component count per board, operator speed, board handling method, and shift pattern. Southern Machinery should calculate this using your actual BOM and monthly volume rather than a generic payback promise.

2. More stable soldering preparation

Automatic lead cut and clinch, when configured for the product, can improve part retention before wave or selective soldering. This helps reduce variation caused by manual bending, inconsistent insertion depth, or handling between workstations.

3. Better line balance

If SMT output is stable but THT insertion is slow, WIP builds up between processes. Loader/unloader and conveyor-ready options help the S-4000 integrate into the overall flow so the THT section can better match the line rhythm.

4. Easier smart factory planning

Recipe-driven programs and integration-ready handling make it easier to implement barcode tracking, MES connection, and standardized production reporting. This is especially useful for EMS buyers who need repeatability across customers and product revisions.

Key selection parameters before buying

Before recommending the final S-4000 configuration, Southern Machinery would normally confirm:

PCB size range, panelization, thickness, and board edge clearance
Axial component list, including body size, pitch, lead diameter, polarity, and tape format
Components per board and target boards per hour or pcs/month
Current manual insertion manpower and shift pattern
Required soldering process: wave soldering or selective soldering
Whether radial insertion, odd-form insertion, or manual assist stations are also needed
Loader/unloader, conveyor, buffer, and NG/OK handling requirements
Quality target, inspection plan, and traceability requirements
Available floor space, power, compressed air, and line direction

This is where Southern Machinery's full-line capability matters. The right solution may involve one S-4000, but it could also include radial insertion, odd-form insertion, board handling, wave soldering, AOI, or a phased automation plan.

Buyer guidance: when the S-4000 is a strong fit

The S-4000 is a strong candidate when:

Your product has repeat axial taped components
Manual THT insertion is a real bottleneck
You need more stable lead forming before soldering
Your factory wants to reduce dependency on manual operators
You are planning an inline SMT + THT + soldering process
You need a cost-effective automation upgrade without overbuilding the line

It may be overkill if axial volume is very low, the product changes constantly, or the axial components are too irregular for efficient automated feeding. In that case, Southern Machinery can help compare a semi-automatic or phased solution instead of forcing a high-CapEx configuration.

FAQ

Is the S-4000 only for resistors and diodes?

It is designed for axial taped components, and the source document specifically mentions resistors, diodes, and similar axial parts. Final component suitability should be checked with your BOM, pitch, body size, lead shape, and tape specification.

Can it connect with a wave soldering line?

Yes. The machine is positioned as inline-ready, with loader/unloader options and conveyor-ready interfaces. A typical THT line can place axial insertion before wave soldering or selective soldering, depending on board design.

What throughput should I use for ROI calculation?

The source document lists up to about 20,000 components/hour as a typical, program- and part-dependent figure. For ROI, use your actual component count per board, current manual labor, shift hours, and expected utilization. Southern Machinery can provide a more realistic estimate after reviewing your data.

Can Southern Machinery provide the full line, not only the insertion machine?

Yes. Southern Machinery provides SMT, THT insertion, wave soldering, selective soldering, board handling, inspection, traceability integration, training, spare parts, and global service support. The goal is a complete PCB assembly automation solution, not just a standalone machine.

What information is needed for a quotation?

Please prepare your PCB drawing, axial BOM, component tape specifications, target output, shift pattern, floor space, and preferred automation level. Photos or videos of the current manual process are also helpful.

Are the listed specifications final?

No. Values such as throughput, PCB size support, utilities, and labor impact are typical or configuration-dependent. Final specifications must be confirmed against your product and selected machine options.

CTA: get a practical THT automation configuration

If axial insertion is slowing down your PCB assembly line, send Southern Machinery your PCB size range, axial component list, current output target, and soldering process. We can recommend a practical configuration for the S-4000, feeders, loader/unloader, board handling, and downstream wave or selective soldering.

Southern Machinery focuses on high-efficiency, cost-effective SMT and THT automation for smart EMS factories. For buyers planning a new line or upgrading manual THT production, the best next step is a technical review of your actual board and BOM.