Choosing a pick-and-place machine for a semiconductor PCB line usually comes down to two questions: how large a board you need to place and how much you can put into a used machine. The Hanwha Samsung SM421 and the YX (Yingxing) SMT-550-X are both used automatic pick-and-place machines, but they are aimed at different budgets and production priorities. This head-to-head compares their listed price, board envelope, feeder support, and equipment details to help you decide.
Quick verdict
The Hanwha Samsung SM421 is the better pick for larger-format work and line integration. The YX (Yingxing) SMT-550-X is the better pick for a tighter initial budget and a complete operator setup.
Comparison table
| Consideration | Hanwha Samsung SM421 | YX (Yingxing) SMT-550-X |
|---|---|---|
| Listed price | USD 19,000.00 | USD 7,800.00 |
| Condition | Used | Used |
| Machine type | Pick and Place Machine | Pick and Place SMT Machine, Automatic |
| Head count | 4 spindle heads | 4 head |
| Board size range | 2\" x 2\" to 18\" x 16\" | - |
| Feeder support | Fixed feeder bank | Plugs for electronic CL style feeders |
| Vision / software | On-the-fly vision | T100 PNP software |
| Display | - | 21\" ASUS touchscreen 1080p |
Where the Hanwha Samsung SM421 wins
The Hanwha's board envelope, fixed feeder bank, on-the-fly vision, and left-to-right flow make it the line-integration pick. The machine is listed as fully functional, and the left-to-right process direction means it can match the material flow of an existing PCB line without reworking the line layout. For a shop running boards that get close to a foot and a half, that kind of line compatibility is what separates it from a smaller standalone unit.
Where the YX (Yingxing) SMT-550-X wins
The YX wins on initial cash outlay and the completeness of the operator package. It is the same model as the HWGC HW-T4-50F, and the lower list price leaves room in the budget for feeders or other line components. If you are starting a placement cell rather than retrofitting a long assembly line, the YX gives you a faster path to production without a heavy upfront spend.
Hanwha Samsung SM421 Pick and Place Machine
Choose the Hanwha when the 2-inch board minimum and on-the-fly vision capability are what your boards actually need. With 4 spindle heads and a 2\" x 2\" minimum board size, the SM421F supports small-format work without giving up the larger 18\" x 16\" maximum for panels that need more surface area. The 2010 build date is the main limitation: this is a used machine with that history, so it is not a new installation and should be evaluated as a durable but older pick-and-place asset. The SM421F model designation gives you a specific platform to identify exactly what you are buying.
YX (Yingxing) SMT-550-X - 4 Head Pick and Place Machine - IN USA
Choose the YX when the electronic CL feeder support and the included touchscreen are enough to get your line running. The machine is the Yingxing version of the HWGC HW-T4-50F, so it shares that model's Pick and Place SMT Machine layout. The standalone-height setup is the limitation: it is a machine built for a standalone position in an assembly line, so it works best as a dedicated placement cell. The 21-inch ASUS touchscreen and the T100 software round out a fairly complete workstation, and the HDMI-ready motherboard and cloned Samsung SSD show that the computing hardware has been updated.
Final choice by use case
Choose the Hanwha Samsung SM421 when board capacity and line integration are the priority. Choose the YX (Yingxing) SMT-550-X when the starting budget is the priority and a standalone automatic machine is acceptable. The right pick depends on whether your line is powered by large panels or by a leaner entry into pick-and-place production.
