XL Span (15mm) Radial Lead Auto Insertion by Southern Machinery: Precise THT Assembly for Large Radial Components

Watch in Action: XL Span 15mm Radial Lead Auto Insertion Machine

What Is This Machine Used For?

Q: What is an XL-span radial lead auto insertion machine?

A: It is a THT (Through-Hole Technology) auto-insertion machine configured to place radial lead components — the kind where two leads exit from the same side of the component body — with an extra-large (XL) lead span of up to 15mm. The "span" is the center-to-center distance between the two leads. Standard radial inserters handle narrow spans (typically 2.5mm, 5mm, or 7.5mm); the XL-span configuration extends that capability to 15mm so larger radial parts can be inserted automatically instead of by hand.

Q: Which components need an XL-span machine?

A: Large-can electrolytic capacitors, power film capacitors, radial inductors, and power resistors used in power conversion and motor-drive circuits. These parts are physically wider across the leads, so they demand wider tooling, wider feeder pitch, and a more robust insertion head than a compact radial part.

Q: Why not just insert these manually?

A: Manual insertion of large radial components is a classic bottleneck. Operators must identify polarity, orient the body, bend and trim leads consistently, and seat the part without damaging the PCB. Errors show up as reversed capacitors, bent leads, lifted bodies, and inconsistent stand-off — all of which drive rework, scrap, and field failures.

Typical Application Scenarios

XL-span radial components concentrate in power-dense designs. Southern Machinery serves these sectors with the same full-line philosophy:

Power Supplies & LED Drivers — Power film capacitors and large electrolytics with wide lead spans are the norm in switch-mode power supplies, ballasts, and LED driver boards.
Home Appliances — Air-conditioner, microwave, induction-cooker, and electric-kettle control boards carry power-stage radial components that are labor-intensive to place by hand.
Vehicle Electronics — Car audio and vehicle power-supply modules use large radial capacitors and inductors that must be placed with consistent polarity and stand-off for reliability under vibration.
Energy-Saving & Industrial Lighting — Street lamps, floodlights, and industrial luminaires rely on large radial components on long MCPCB/PCB formats.

How It Integrates Into a Complete PCB Assembly Line

An XL-span radial insertion machine slots into the THT portion of a mixed SMT/THT line:

Upstream — SMT components are placed by Pick-and-Place machines and reflowed in a Reflow Oven, leaving only the through-hole parts to handle.
Radial insertion — The XL-span machine receives the PCB and inserts large radial components automatically, with polarity detection and consistent lead forming.
Optional lead processing — An inline auto lead cutter trims leads to uniform length before soldering.
Soldering — The board proceeds to Wave Soldering (or selective soldering for mixed-technology boards).
Inspection — AOI and manual verification confirm polarity and placement before test.

Because the machine communicates with the same board-handling and MES infrastructure as the rest of the line, it removes the manual buffer stage that typically sits between SMT reflow and THT soldering.

Key Selection Parameters

When evaluating an XL-span radial insertion machine, confirm these parameters with the supplier rather than assuming any specific figure:

Maximum lead span — verify the machine covers your widest radial component (up to 15mm for XL-span work).
Component envelope — body diameter, height, and lead diameter range the feeder and head can accept.
Polarity / orientation detection — how the machine verifies correct orientation before insertion to prevent reversed capacitors.
Feeder capacity and style — how many component types and stations the feeder supports for changeover efficiency.
Insertion force control — adjustable force that seats leads without damaging the board or the component body.
Changeover speed — time to switch between component types for high-mix production.
Board handling compatibility — maximum board size, thickness, and SMEMA/rail interface for line integration.

ROI, Quality & Throughput Considerations

The ROI case for automating XL-span radial insertion rests on three levers:

Labor reduction — one machine replaces several manual operators per shift on a high-volume board, and it runs at a consistent pace without fatigue.
Quality improvement — automatic polarity detection and consistent lead forming eliminate the two most common manual defects: reversed parts and bent or inconsistently trimmed leads.
Throughput stability — predictable CPH (components per hour) lets planners forecast line output and remove the manual-insertion buffer that hides WIP.

For procurement teams, the calculation is straightforward: divide the machine investment by the annualized labor, rework, and scrap savings on your highest-volume power board, then compare the payback against leaving the XL-span parts on manual stations. Southern Machinery's positioning — comparable automation at 40–60% of Japanese/Tier-1 equivalents — shortens that payback materially for Tier 2 and Tier 3 EMS providers.

FAQ

What is the lead "span" on a radial component?

The span is the center-to-center distance between the two leads that exit from the same side of the component body. XL-span machines extend this to 15mm.

Which radial components require XL-span handling?

Large-can electrolytic capacitors, power film capacitors, radial inductors, and power resistors used in power supply and motor-drive circuits.

Can an XL-span machine also run standard narrow-span radial parts?

Yes — span-capable inserters typically accept a range of spans, so one machine can handle both standard and XL-span components. Confirm the exact range with the supplier.

Does Southern Machinery offer the machine as a standalone or part of a line?

Both. Southern Machinery supplies standalone THT insertion machines as well as complete SMT + THT lines, including Wave Soldering, board handling, and inspection.

How do I confirm the machine fits my board and components?

Send your component drawings (span, body size, lead diameter) and board dimensions; Southern Machinery engineers confirm tooling and feeder compatibility before quoting.

Contact Southern Machinery

Ready to eliminate the manual-insertion bottleneck on your power boards? Two questions worth answering first:

What is your current manual-insertion defect rate on large radial components, and what does one rework cycle cost you?
How many XL-span radial placements per board, and what is your target daily output across how many shifts?

Southern Machinery has served 237+ global customers since 2011 from Shenzhen, China, delivering high-efficiency, cost-effective SMT/THT PCB assembly automation with full-line solutions, spare parts, training, and global support.

Website: https://www.smthelp.com
Email: jasonwu@smthelp.com
Phone / WhatsApp: +86 13602562576
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