Zhejiang Rosso Equipment Manufacturing builds sock machines in Zhuji, Zhejiang. Its headline range is the RS-615F/616F integrated series, which knits a sock, links the toe stitch to stitch and turns it on one machine, with a sister model, RS-616DF, for patterned terry. The wider catalogue covers 7F/8F cotton-sock machines, fine hosiery, three-dimensional knitting and separate toe-closing and turning machines. For a quotation, send your yarns, sock designs and sizes, and name the model, cylinder and needle count you want priced.
Rosso works in hosiery machinery. Its company introduction covers development, manufacture, sales and service, and names machining centres and CNC lathes among its own workshop plant. Most sock mills will start with the integrated series, because it puts knitting, toe linking and turning on a single frame.
Beyond that series the catalogue reaches 7F/8F cotton-sock machines, fine-hosiery equipment, three-dimensional knitting, and stand-alone toe-closing and turning machines. A mill that wants to keep its present knitters can price the closing and turning machines by themselves. Set any of them beside hosiery knitting machines listed by other makers, and ask Rosso which items your offer actually includes, since a long catalogue does not put a whole line into one quote.
The introduction page shows a 2020 date yet carries later material. If headcount, plant totals or market share matter to your supplier approval, ask Rosso for current figures. It also helps to know how to weigh a maker's own company page against outside records. [1]
Rosso names three operations inside one machine: knitting, stitch-to-stitch toe linking and turning. The same machine can make open-toe socks with linking and turning left unused, so tell Rosso which output your order needs. The full cylinder, needle and speed data sits on the RS-615F/616F equipment page. [2]
Plain, terry or patterned-terry construction, depending on the model, on the cylinder and needle count that suit your yarn and design.
The toe is joined stitch to stitch on the machine. Judge the seam on socks knitted from your own yarn.
The sock is turned before it leaves. Boarding, pairing and packing happen elsewhere, so agree who supplies that equipment.
With linking and turning switched out, the machine delivers open-toe socks for a separate closing route.
Rosso's table treats RS-615F/616F as dual-purpose plain and terry machines and RS-616DF as the patterned-terry model, called 任意毛圈 in Chinese. Speed changes with the fabric structure. These are knitting speeds in rpm, so a rate for finished socks has to come from a counted run. [2]
Swipe the table sideways to see every column.
| Model | Cylinder and needles | Knitting speed | Selectors |
|---|---|---|---|
| RS-615F | 84–220 N; 3.5 or 3.75 inch cylinder | Plain 350 rpm; terry 300 rpm | Eight 8-stage piezoelectric |
| RS-616F | 84–220 N; 3.5 or 3.75 inch cylinder | Plain 350 rpm; terry 300 rpm | Nine 8-stage piezoelectric |
| RS-616DF | 108–200 N on a 3.75 inch cylinder | All-plain 300 rpm; patterned terry 250 rpm | Nine 8-stage plus one 6-stage |
The series page describes a single feed layout: a main feed with nine main yarn fingers, an elastic feed with two elastic fingers, and six auxiliary feeds carrying 18 auxiliary fingers between them. Fifteen photoelectric sensors stop the machine on a yarn break, and air blowing keeps several yarn and sock-handling points clear.
Rosso lists plain, terry, patterned terry, jacquard, tuck, mesh and several welt structures for the series. The model table narrows that list for each machine, so send your artwork and terry placement and have Rosso say which model knits it. Selector counts describe patterning hardware; ask Rosso to map your colours onto the yarn fingers using your own design. [2]
Rosso's customer notes give three utility figures. Pass them to your electrician and plant engineer early, and get the wiring and layout drawings for the configured machine before you prepare the floor. [2]
Swipe the table sideways to see every column.
| Service | Published requirement |
|---|---|
| Electrical | 380 V ±38 V at 50–60 Hz, with voltage stabilization and proper grounding |
| Compressed air | 0.62–0.65 MPa, clean and free of oil and water |
| Extraction | Above 5.5 kPa; airflow and connection to be agreed with Rosso |
Jiyang College of Zhejiang A&F University reported on 4 January 2024 that it had visited Rosso on 2 January. The talks covered coursework and practical teaching, such as taking machines apart, running them and assembling components. The report describes the visit and its topics; ask Rosso whether any training arrangement followed.
In March 2025 Rosso announced that it had received Zhejiang Made certification. The announcement gives little certificate detail. If the mark matters to your own customers, ask Rosso for the certificate, its current status and the products it covers. [3] [4]
With an integrated machine you are paying for finished socks, so plan the purchase around them. Send yarns and artwork with the enquiry and keep the same set for a trial on your own yarn.
Rosso says the integrated design saves labour and shortens delivery. Put a number on that only against your current line, measured the same way. [2]
Model, cylinder, yarns, sizes, artwork and the output mode you want priced.
Time knitting, transfer, linking and turning together, and count accepted socks, rejects and stops.
Look at the linked toe and the turned sock against your reference before agreeing any rate.
Have the operator clear a yarn break or a stalled handoff and show how the affected piece is marked.
Write in utilities, auxiliary equipment, training, spare parts, service and acceptance terms, and attach the sample report.
Published model or series information. Open the equipment record for its full scope and configuration notes.
Equipment series
The Rosso RS-615F and RS-616F knit a sock, close the toe stitch to stitch and turn it before discharge. Both take a 3.5- or 3.75-inch cylinder with 84–220 needles; listed speeds are 350 rpm for plain and 300 rpm for terry. The RS-615F has eight piezoelectric selectors, the RS-616F nine. Send yarn, sizes, sock design and output mode, and ask for a counted full-cycle run.
Swipe the table sideways to see every column.
| Parameter | Published value |
|---|---|
| Cylinder diameter choices | 3.5 or 3.75 in |
| Needle count range | 84–220 |
| Listed plain knitting speed | 350 rpm |
| Listed terry knitting speed | 300 rpm |
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Before any deposit goes to Zhuji, Rosso should state in writing the model and selector layout, the structures it will knit on your design, the output mode, the utility schedule for the configured machine, and a finished-sock rate from a counted run on your yarn. The founding year and technical figures come from Rosso's own pages. Request the Zhejiang Made certificate itself if your buyers need it.
Zhejiang Rosso Equipment Manufacturing · Manufacturer publication
Rosso's base in Zhuji, the 2003 founding year and the workshop machines it lists. Some of the content is newer than the date shown on the page.
Publication: Page displays 2020-04-16; body includes later information · Reviewed: 2026-10-07
Zhejiang Rosso Equipment Manufacturing · Manufacturer publication
The integrated sequence, the open-toe mode and the model table with cylinders, needles and speeds. It also gives selectors, feeds and utility requirements.
Publication: 2025-03-03 · Reviewed: 2026-10-07
Jiyang College of Zhejiang A&F University · Independent institutional record
The college's account of its January visit and the teaching topics discussed with Rosso.
Publication: 2024-01-04 · Reviewed: 2026-10-07
Zhejiang Rosso Equipment Manufacturing · Manufacturer publication
Rosso's own announcement of the certification. It gives little detail about the certificate itself.
Publication: 2025-03-14 · Reviewed: 2026-10-07
Each source above lists its publisher, what it covers and the date it was checked. Read our editorial policy or report an outdated detail.