Wide-Span Radial Insertion: Auto-Inserting XL 15mm Lead Span Components for THT Assembly

Large radial components — big film capacitors, X2 safety capacitors, MOVs, thermistors, and oversized electrolytics — are often the last parts still hand-inserted on a THT line. Their lead spans exceed the 2.5–10.0mm range of a standard radial inserter, so EMS factories keep a manual station open just for them, accepting the cost, rework, and inconsistency that come with it.

Southern Machinery's wide-span radial insertion capability addresses exactly this gap. The company's radial insertion platform can be configured for XL lead spans up to 15mm, bringing genuinely large radial components into automated THT insertion — and the S3010A / S3000 platforms behind it deliver verified throughput of up to 18,000 CPH (mechanical) with vision correction, lead cutting and clinching.

What is this machine used for?

A wide-span radial insertion machine is an automatic THT assembly station that takes tape-packed radial-lead components, straightens and forms their leads, cuts and clinches them under the board, and inserts them into a PCB at high speed — with a wider lead-span envelope than standard machines.

In plain terms: if your radial components have a lead pitch (span) wider than what a conventional 10mm inserter accepts, a wide-span configuration keeps those parts on the automated line instead of pushing them to a manual station. It is used for:

• Power supply PCBs — AC input caps, bulk electrolytics, MOVs and thermistors on power, ballast, charger and inverter boards
• Appliance control boards — large film and safety capacitors on air conditioner, induction cooker, microwave and washing machine control PCBs
• LED lighting drivers — high-voltage radial components that carry wide lead pitches
• Automotive and new-energy electronics — EV charger, BMS and onboard power boards where through-hole reliability is mandatory
• Industrial and medical electronics — instruments, meters, and control boards that keep THT parts for vibration resistance and field repairability

Why Standard 10mm Span Isn't Enough

Radial components are defined by their lead span — the distance between the two leads. Most radial inserters are built around a standard span envelope:

• Southern Machinery's S3010A Radial Inserter supports a full range of insertion spans from 2.5mm to 10.0mm, including 3.5mm, and can insert 2.5 / 5.0 / 7.5 / 10.0mm span components in the same program.
• The S3000 Automatic Radial Component Insertion Machine is a dual-span machine at 2.5 / 5.0mm (with multi-span variants), rated 18,000 CPH mechanical / ~10,000 CPH typical.

Large power and safety components routinely exceed that envelope. A wide-span configuration extends the insertion span up to 15mm, which is precisely the gap that forces manual insertion in many factories today. Instead of adding a hand-loading station, the wide-span machine handles those components with the same feeding, cutting, clinching, and polarity verification as the standard process.

Verified Performance Reference Points

Because the wide-span configuration shares the S3010A/S3000 radial insertion platform, buyers can evaluate it against these verified platform specifications:

Parameter	S3010A (verified)	S3000 (verified)
Insertion speed	Up to 12,000 CPH	18,000 CPH max (mechanical), ~10,000 CPH typical
Span range	2.5 – 10.0mm (incl. 3.5mm), multi-span programs	2.5 / 5.0mm dual span; multi-span variants
Insertion direction	Programmable, multi-angle	0–360°, adjustable in 1° increments
Position correction	Component value & polarity verification before insertion	Machine vision position correction
Lead processing	Programmable-height clinch options (protects nearby SMD parts)	Automatic lead cutting and clinching
Max PCB	400 × 400mm, auto load/unload	Consult platform datasheet
Programming	New PCB program within 5 minutes, offline support	Offline programming support

The 15mm wide-span capability is a configuration of the radial insertion platform; for span, component body size, and PCB limits on your exact model, confirm the configuration with Southern Machinery — the checklist below shows the questions to ask.

How It Fits into a Complete PCB Assembly Line

A wide-span radial inserter is not a standalone curiosity — it is a module inside a full SMT/THT assembly line:

1. SMT section — solder paste printing, Pick and Place, Reflow Oven, SPI and AOI handle the SMD population.
2. THT insertion section — the radial inserter (wide-span configuration) auto-inserts radial components; axial and odd-form machines cover the rest of the through-hole population.
3. Soldering section — Wave Soldering (lead-free dual-wave) solders all THT joints in one pass.
4. Board handling & finishing — loaders, conveyors, buffers, unloaders, depaneling, and cleaning machines keep the line flowing and the boards clean.

Southern Machinery has supplied SMT/THT assembly automation since 2011 from Shenzhen, China, and serves 237+ customers worldwide. The company provides whole-line solutions — SMT placement, THT auto insertion, wave soldering, board handling, and inspection — so a wide-span radial insertion module can be quoted as part of a complete line or retrofitted into an existing THT section with standard SMEMA-style conveyors.

Key Selection Parameters

No two wide-span projects are identical. When requesting a configuration, prepare these parameters (no values assumed here — they define the machine):

• Maximum lead span of your components — standard is 2.5–10.0mm; wide-span goes up to 15mm. List every span value in your BOM.
• Component body size — max body height and body diameter/width (reference: the standard platform handles up to ~20mm height / ~13mm body diameter; wide bodies need confirmation).
• Lead diameter — typical radial leads up to ~0.7mm (confirm for your parts).
• Tape packaging pitch — radial tape pitch (e.g., 12.7mm / 15mm pitch formats) and reel size.
• PCB dimensions and thickness — max board size, top/bottom clearance, and whether auto load/unload is needed.
• Insertion direction requirements — whether 0–360° at 1° increments is required for your layout.
• Lead cutting and clinching — cut length (e.g., 1.5±0.3mm short / 2.0±0.3mm long blade options) and clinch angle; whether programmable clinch height is needed to protect nearby SMD components.
• Required throughput (CPH) — target output to size the machine and the number of stations.
• Quality verification — whether component value and polarity verification before insertion is required.
• Integration — conveyor height, SMEMA communication, MES data interface, and existing line software.

ROI, Quality & Throughput Impact

• Replaces manual insertion loss. Hand insertion of large radial parts is slow, error-prone, and hard to keep consistent across shifts; automation removes that variance at the source.
• Less rework, less scrap. Vision correction and value/polarity verification stop wrong-value and wrong-orientation parts before they are soldered — the "zero e-waste" principle of inserting correctly the first time.
• Throughput at scale. Moving wide-span parts from a manual station onto the insertion line removes a chronic bottleneck on power and appliance boards.
• Stable process for certification. For automotive, medical, and industrial customers, documented automated insertion with clinching produces the repeatable joints that IPC-based quality systems expect.

FAQ

What is the difference between a standard and a wide-span radial insertion machine?

A standard radial inserter handles lead spans of 2.5–10.0mm. A wide-span configuration extends the accepted lead span up to 15mm, so larger radial components (big film caps, X2 safety caps, MOVs, thermistors, large electrolytics) can be fed, inserted, cut and clinched automatically instead of by hand.

Which components can a wide-span radial inserter handle?

Tape-packed radial-lead components with wide lead spans — primarily large capacitors (film, X2 safety, electrolytic), MOVs, thermistors, and other power-stage parts used in power supply, appliance, LED driver, and automotive boards.

Can it insert different lead spans in the same program?

Yes. The S3010A platform inserts 2.5 / 5.0 / 7.5 / 10.0mm span components in a single program; a wide-span configuration extends this envelope toward 15mm. Mixed-span boards do not need separate runs.

Does the machine verify components before insertion?

The S3010A performs component value and polarity verification before insertion, and the S3000 uses machine vision for position correction. This reduces wrong-value and wrong-orientation defects before soldering.

Does wide-span insertion still cut and clinch leads?

Yes. Automatic lead cutting and clinching is part of the process, with programmable clinch height options on the S3010A to avoid damaging adjacent SMD components.

How do I know if my components fit a wide-span configuration?

Send your BOM's lead-span, body size, and lead-diameter data to Southern Machinery. The selection checklist above lists the parameters a configuration engineer will ask for; no assumptions are made on your parts.

Get a Configuration Recommendation

Wide-span radial insertion is a configuration decision, not a guess. Southern Machinery will match the machine to your component envelope, PCB size, and target throughput — as a standalone module or as part of a complete SMT/THT line.

• Contact Southern Machinery for a configuration recommendation: jasonwu@smthelp.com | +86 13602562576
• Browse product catalogs and PDFs at file.autoinsertion.com
• View machine photos at ph.smthelp.com
• Watch the wide-span radial insertion demo on the Southern Machinery YouTube channel