The Factory Inside Your Gadgets: Southern Machinery THT Auto Insertion Machines

Watch the deep dive — how auto insertion machines build the electronics inside the gadgets you use every day:

What Is This Machine Used For?

Open almost any consumer product — a phone charger, an induction cooker, a TV power board, an LED street lamp, a car audio system — and you will find a PCB assembled in a factory. A large share of those boards carry through-hole (THT) components: parts with wire leads that insert through drilled holes and are soldered on the opposite side. For decades, that insertion step was done by hand on a DIP line. A THT auto insertion machine replaces that manual work.

An auto insertion machine picks components from tape feeders, vibration bowls, or tube feeders; forms and positions their leads; inserts them through the PCB; and clinches the leads underneath so boards stay stable before soldering. Southern Machinery's THT automation family covers three workload classes:

Radial-lead insertion — the S-3010B (off-line) and S-3000 automatic radial insertion machines for tape-packed radial components: capacitors, transistors, LED lights, and key switches. The S-3010B supports single-, dual-, triple-, and quad-span variants with lead spans of 2.5 / 5.0 / 7.5 / 10.0 mm, inserts in any direction from 0° to 360° in 1° increments, and uses a servo-driven insertion head with automatic lead cutting and clinching (clinch length 1.5–2.2 mm, clinch degree 10–35°).
Odd-form insertion — the S-70LD for non-standard parts (transformers, relays, connectors, fuse holders, terminal blocks) that don't fit radial or axial tape, using vision guidance to locate and orient each part regardless of presentation.
Pin and terminal insertion — the S7020 series for PIN, eyelet, and terminal components at high throughput, with inward/outward clinching and vibration-bowl or reel feeding.

Why does this matter for a "smart EMS factory"? Manual DIP insertion is the last labor-intensive island in an otherwise automated line. Operators are hard to hire and train, quality drifts with every shift change, and throughput is capped by headcount. An auto insertion machine turns that variable cost center into a repeatable, predictable process — which is what factory intelligence looks like on the shop floor.

Typical Applications

THT auto insertion machines appear wherever boards carry radial-lead, odd-form, or pin/terminal components in volume. Real production scenarios:

Power supplies and chargers — switch-mode PSU boards with large radial electrolytic capacitors and rectifier diodes. Manual insertion is slow here, and lead-clinch quality directly affects solder joint reliability.
Home appliance control boards — air conditioners, induction cookers, microwave ovens, rice cookers, and electric kettles, where key switches, transistors, and radial capacitors repeat across many PCB variants.
LED lighting and displays — LED lamps, radial capacitors, and driver components on lighting and luminous-character control boards; high board volume per SKU makes automation economics favorable.
Automotive electronics — car audio, vehicle power supplies, and dashboard modules, where consistent, inspectable THT joints matter for reliability and warranty cost.
Energy-saving lighting and ballast — industrial, outdoor, street lamp, and floodlight drivers that combine THT power components with SMT control circuitry on the same board.

In each case the pattern is the same: standard component families, medium-to-high volume per SKU, and quality requirements that make manual insertion a liability.

How It Fits Into a Complete PCB Assembly Line

A THT insertion machine is not an island — it is a station inside a mixed-technology line. The typical flow for a board with both SMT and THT content:

SMT placement → reflow → (THT insertion: radial + odd-form + pin/terminal) → wave soldering → cleaning → inspection (SPI/AOI) → depaneling → final assembly

Southern Machinery builds the ecosystem around that flow, so a buyer can source the insertion station and its neighbors from one supplier:

Radial insertion — S-3010B (off-line) and S-3000 automatic radial insertion machines for tape-packed radial components.
Odd-form insertion — S-70LD vision-guided station for non-standard parts that don't fit radial or axial tape, placed directly upstream of the wave solder machine.
Pin and terminal insertion — S7020 series for pin/eyelet terminals at higher throughput, with inward/outward clinching.
Downstream soldering — S-WS450 and S-WS350B lead-free dual-wave soldering machines that take inserted boards through turbulent and laminar waves.
Support equipment — board handling (loaders, unloaders, conveyors), stencil cleaning, SMT reel scrap cutters, X-ray chip counters for inventory control, and custom SMT nozzles and feeders.

Sourcing the whole chain from one design house matters for integration: conveyor heights, SMEMA signaling, control interfaces, and spare-parts availability all line up when the insertion station, wave solder, and board handling come from the same supplier.

Key Selection Parameters

Buyers should evaluate a THT insertion machine against their own board mix. The parameters that decide the right configuration:

Component mix and lead spans — radial span capability (2.5 / 5.0 / 7.5 / 10.0 mm variants), odd-form part size and height range, or pin/terminal gauge. Match the machine to the components you actually load, not the full catalog.
Throughput — rated CPH versus realistic actual speed for your lead spans and clinch settings. Rated figures are quoted at ideal conditions; ask for actual-speed numbers on your components.
PCB format — board width and length limits, thickness range, and whether panelized boards pass through cleanly.
Insertion direction and clinch — 0°–360° insertion in 1° steps, and the clinch type that suits your solder process and wave pallet design.
Vision correction — lead-position correction and polarity checks that prevent misinsertion and reversed components before they reach the solder joint.
Feeder configuration — number and type of feeders (tape, vibration bowl, tube, reel), changeover time between SKUs, and component-family coverage.
Line integration — off-line (standalone, one operator) versus inline (SMEMA handshake, conveyor-connected) configuration, and compatibility with your existing wave solder and board handling.
Utilities and footprint — power supply (e.g., 220V single phase), air pressure and consumption, machine size and weight versus floor space.
After-sales support — spare parts availability, training, and service response, especially for a machine that will run two or three shifts.

ROI and Quality Perspective

From a buyer's standpoint, the business case rests on three numbers: labor cost per board, rework rate, and field failure cost.

Manual insertion cost is dominated by labor — hiring, training, turnover, supervision — and it scales with headcount, which scales with volume. An auto insertion machine converts that into a fixed equipment cost with a predictable CPH. Southern Machinery's S-3010B product page states the cost-reduction claim at up to 40%; treat that as a directional manufacturer claim and model your own numbers with your labor rates and board mix.

Quality is where automation pays twice. A vision-corrected, servo-driven head seats every lead to the programmed depth, eliminating the classic manual defects named on the S-70LD page: floating-high components, missing leads, misinserted parts, and reversed polarity. Fewer defects at insertion means fewer boards pulled for rework — and fewer field failures, the most expensive failure class in electronics.

Finally, think about the smart-factory angle. Machines with industrial-PC control and an English or Chinese operator interface (as on the S-3000 and S-3010B) support offline programming, program management, and data that feeds MES integration — the difference between a DIP line managed by clipboard and one managed by data.

FAQ

What is a THT auto insertion machine?

A THT (through-hole technology) auto insertion machine automatically places through-hole components — parts with wire leads that insert through holes in the PCB — instead of hand insertion. It feeds, forms, inserts, and clinches leads, typically on the DIP line ahead of wave soldering.

What components can a THT insertion machine handle?

Radial-lead components such as capacitors, transistors, LED lights, and key switches are the standard workload for the S-3010 series (lead spans 2.5 / 5.0 / 7.5 / 10.0 mm). Other machines in the family cover odd-form parts (transformers, relays, connectors) with the S-70LD, and PIN, eyelet, and terminal components with the S7020 series.

How fast is a THT insertion machine?

It depends on the platform and component. For reference, the S-3010B radial inserter is rated at 22,000 CPH with an actual operating speed of about 13,000 CPH; the S-3000 is rated at 18,000 CPH with about 10,000 CPH actual; the S7020 pin/terminal inserter is rated at 12,000 CPH. Ask the supplier for actual-speed figures for your specific components before committing.

Do I need to replace my whole line to automate insertion?

No. Off-line models like the S-3010B run standalone with one operator, so you can automate the highest-volume components first. Inline models like the S-70LD connect to the conveyor via SMEMA handshake and sit directly upstream of wave soldering, so you can add them to an existing line.

What is the difference between radial, odd-form, and pin/terminal insertion?

Radial insertion machines handle standard radial-lead components in tape format at high speed. Odd-form insertion machines handle non-standard parts — transformers, relays, connectors, fuse holders — using vision guidance regardless of presentation. Pin/terminal insertion machines handle PIN, eyelet, and terminal components fed from vibration bowls or reels, with inward/outward clinching.

How do I get a catalog or quote for a THT insertion machine?

Contact Southern Machinery directly: email jasonwu@smthelp.com or call/WhatsApp +86 13602562576. Product catalogs are available at file.autoinsertion.com, and product images and albums are hosted at ph.smthelp.com.

---

Talk to the Southern Machinery Team

Southern Machinery (Shenzhen Southern Machinery Sales And Service Co., Ltd) designs and manufactures SMT and THT automation for PCB assembly. Founded in 2011 in Shenzhen, China, the company serves 237+ global customers across EMS, lighting, power supply, appliance, and automotive electronics, and positions itself as the smart EMS factory partner.

Whether you are replacing a manual DIP line or adding capacity to an existing one, the team can walk you through radial, odd-form, and pin insertion platforms, wave soldering, and board handling — and send the catalog and machine images so you can evaluate before you commit.

Email: jasonwu@smthelp.com
Phone / WhatsApp: +86 13602562576
Catalog downloads: https://file.autoinsertion.com
Product images & albums: https://ph.smthelp.com
Website: https://www.smthelp.com