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Views: 1 Author: Site Editor Publish Time: 2026-10-21 Origin: Site
Knitting capacity is the number every knitwear buyer needs before signing a purchase order, yet it usually arrives as a catalogue maximum speed or a daily figure that quietly assumes a perfect shift. When that figure meets real yarn and real style changes, delivery dates slip and yarn is over-ordered.
A computerized flat knitting machine typically produces 30 to 50 standard sweaters in 24 hours, while an automated circular knitting machine with a 30 to 34 inch cylinder produces roughly 250 to 600 kg of single jersey fabric per day. Simple styles on well-configured machines can exceed 100 flat-knit pieces or 1,000 kg of fabric, and shaped seamless garments fall to 25 to 80 pieces per machine per day, so the honest answer is a range set by machine type, gauge, stitch density and measured efficiency rather than a single headline number.
The sections below break that range down by machine type, then show how to calculate it for your own equipment.
Yes, fully automatic knitting machines exist and have been the industrial standard for decades. A knitting machine is any device that produces knitted fabric in a semi or fully automated fashion, so the real distinction today is mechanical patterning versus electronic needle selection.
A truly automated machine selects needles from a stored program, feeds and changes yarn, controls take-down tension and stops itself on fault. Machines that only motorise the carriage but still rely on punch cards are semi-automatic, and they behave differently on a production floor.
Flat machines hold needles in straight beds and form fabric as a carriage travels back and forth, so cycle time depends on working width and reversal count rather than continuous rotation. Computerized models run at roughly 0.8 to 1.6 metres per second, and because single needles can be held or transferred, one machine can knit a shaped panel or a complete garment with almost no cutting.
Circular machines arrange needles in a cylinder, sometimes with a second set in a dial, and rotate the cam system continuously. Encyclopaedia Britannica notes that large modern machines may carry close to 100 feeders, letting each needle pick up a thread almost 100 times per revolution. Output scales with diameter and feeder count, which is why a circular machine can outperform a flat machine three to five times on plain fabric.
Seamless machines knit a finished-shaped garment in one piece, combining rotary knitting with reciprocating motion for shaped areas. Sock machines apply the same principle at a smaller diameter. Both are measured in pieces per shift, because machine time per piece is fixed by the style.
Figures cluster tightly once machines are grouped by type and gauge. Hand flat machines deliver 5 to 8 sweaters per day, mechanical punch-card machines 10 to 15, computerized flat machines 30 to 50, and circular machines 250 to 600 kg of single jersey, with wide variation at the edges of each band.
The table assumes a 24-hour day, a mid-gauge product, stable yarn supply and efficiency of 80 to 85 percent.
Machine type | Output unit | Typical daily output | Main drivers |
Hand flat bed | Sweaters | 5 to 8 | Operator speed, style complexity |
Mechanical flat bed | Sweaters | 10 to 15 | Punch card changes, carriage speed |
Computerized flat bed, 7G to 12G | Sweaters | 30 to 50 | Gauge, systems, rows per panel |
Simple flat-knit styles | Pieces | 80 to 150 | Fewer rows, coarse gauge, wide bed |
Circular single jersey, 30 to 34 inch | Kilograms | 250 to 600 | Diameter, feeders, RPM, yarn count |
Circular double jersey or rib | Kilograms | 100 to 250 | Two needle beds, heavier structure |
Seamless garment | Pieces | 25 to 80 | Shaping time, garment size, feeders |
Sock machine | Pairs | 120 to 250 | Needle count, terry, jacquard |
The gap between a hand flat and a computerized flat is five to seven times, driven by carriage speed, near-instant pattern change and panels that need no cutting. Within the computerized category, most of the 30 to 50 spread is gauge: a 3G chunky style may need a few hundred rows per panel, while a 14G style can exceed a thousand.
A tube has no fixed length until it is cut, so fabric is sold by weight. A 30-inch single jersey machine with 90 feeders at around 30 RPM and 85 percent efficiency lands between 300 and 450 kg. Raise the diameter to 34 inches with 102 feeders and the same technology passes 550 kg.
Seamless output looks low in absolute terms and misleads for that reason. A shaped legging may occupy a machine for 15 to 40 minutes, so one unit yields only 25 to 80 finished pieces a day, yet each piece leaves close to finished, with no cutting room and far less sewing labour.
Two formulas cover almost every case. Flat machines are calculated by panel cycle time, dividing available minutes by the time one panel takes. Circular machines are calculated by yarn consumption, converting metres knitted per hour into kilograms using yarn count.
Both share one rule: use parameters you have measured, not the ones printed on a nameplate. A machine rated at 1.6 metres per second rarely sustains that on a fine-gauge jacquard.
Measure the usable knitting width in metres, not the full bed width.
Divide by sustained carriage speed to get one traverse in seconds.
Multiply by two and add the reversal allowance, typically 0.2 to 0.4 seconds, to get row time.
Multiply by rows per panel and divide by 60 for panel time in minutes.
Divide available minutes multiplied by efficiency by panel time.
Divide panels per day by the panel equivalents in one garment.
A 52-inch bed running a 0.40 metre width at 1.0 metre per second with a 0.3 second reversal needs about 1.1 seconds per row, so a 900-row panel takes 16.5 minutes. At 82 percent efficiency a 1,440-minute day yields about 71 panels, which at 2.8 panel equivalents per sweater becomes about 25 sweaters.
Production per hour (kg) = (π × D × G × F × L × E × RPM × 60) ÷ (10 × 2.54 × 36 × 840 × Ne × 2.2046)
D is cylinder diameter in inches, G is gauge in needles per inch, F is feeders actually fitted, L is stitch length in millimetres, E is efficiency as a decimal, RPM is sustained revolutions per minute and Ne is yarn English count. Multiply by 24 for a full day, and double the denominator for double jersey and rib.
Take a 34-inch, 24-gauge single jersey machine with 96 feeders, 2.6 mm stitch length, 26 sustained RPM, 0.82 efficiency and 30 Ne yarn. The numerator is 3.1416 × 34 × 24 × 96 × 2.6 × 0.82 × 26 × 60, about 818 million. The denominator is 10 × 2.54 × 36 × 840 × 30 × 2.2046, about 50.8 million. The result is 16.1 kg per hour, or roughly 387 kg per day. A longer stitch raises this figure while producing fewer metres, so kilogram and metre targets must never be mixed in one plan.
Gauge, knitting systems, stitch density, pattern complexity and efficiency account for nearly all variation between two machines of the same type. Systems and efficiency move the daily figure more than any single specification, because they multiply or divide the whole calculation.
A knitting system is one set of cams that can form loops during a single carriage pass. A double-system flat machine knits in both directions and delivers 1.6 to 1.9 times the output of a single-system machine of the same width; a three-system machine reaches 2.3 to 2.6 times. On circular machines the equivalent lever is feeder count, and output rises almost linearly with it.
Moving from 7G to 12G roughly doubles the stitch count in the same width, cutting piece output by 30 to 50 percent even as fabric value rises. Heavier fabric works the other way for weight-based output: more yarn per course raises kilograms per hour while lowering metres. Complex intarsia and frequent colour changes can cost 20 to 35 percent against a plain style.
Variable | Direction of effect | Typical magnitude |
Gauge, 7G to 12G | Lower piece output | 30 to 50 percent fewer pieces |
Second knitting system | Higher output | 1.6 to 1.9 times |
Third knitting system | Higher output | 2.3 to 2.6 times |
Jacquard or intarsia | Lower output | 20 to 35 percent fewer pieces |
Efficiency, 85 to 70 percent | Lower output | 18 percent fewer pieces |
Two shifts instead of three | Lower daily output | 33 percent fewer pieces |
Measured output usually lands between 65 and 85 percent of the calculated figure, and published mill studies have recorded actual circular knitting production close to 68 percent of theoretical capacity. The gap is the accumulated cost of style changes, yarn breaks, needle damage, sampling and waiting.
The most common mistake is assuming 100 percent efficiency, followed by using catalogue RPM and guessing stitch length rather than measuring it. A 0.1 mm error in stitch length shifts daily kilogram output by three to four percent. Treat the formula as a ceiling and apply overall equipment effectiveness instead: a machine available 92 percent of the time, running at 88 percent of rated speed and passing 97 percent of inspection is at about 78 percent effectiveness.
Divide order quantity by daily output per machine multiplied by production days and utilisation, then add allowances for sampling and rework. A 12,000-piece order due in 30 days on machines producing 40 pieces a day at 85 percent utilisation needs 12 machines, not 10.
Sampling consumes machine hours that produce no saleable output, and a 5 percent reservation is realistic on a busy floor. Rework consumes capacity twice. Seasonal peaks also mean the machine count that works in June fails in September, so plan against the peak month.
For a factory with steady order flow, a computerized knitting machine repays its cost in roughly 12 to 24 months on conversion savings alone. For a buyer with intermittent demand the same machine is a depreciating asset, which is why utilisation decides the answer far more than purchase price.
Entry-level 52-inch double-system flat machines from established Chinese clusters commonly list between 5,000 and 15,000 US dollars, multi-system machines with full jacquard capability from 20,000 to 60,000 dollars, and whole-garment platforms above 80,000 dollars. Circular single jersey machines of 30 to 34 inches typically sit between 20,000 and 80,000 dollars.
Cost element | Basis | Approximate cost per piece |
Depreciation | 30,000 USD over 5 years, 12,000 pieces a year | 0.50 USD |
Direct labour | One operator per four machines | 0.23 USD |
Energy | 3.5 kW average draw, 20 hours a day | 0.16 USD |
Needles and consumables | Annual replacement budget | 0.10 USD |
Maintenance | Scheduled service and spares | 0.13 USD |
Total conversion cost | Excluding yarn and finishing | About 1.10 USD |
If in-house conversion saves two dollars per piece against an outsourced knitting charge, a 30,000 dollar machine making 12,000 pieces a year returns its cost in about 15 months. Below roughly 40 percent utilisation it never pays back. Programming skill is the hidden cost, because a machine without someone who can optimise patterns runs at a fraction of its capability.
Yes, and the industry is both active and consolidated. Industrial machines are built mainly in China, Japan, Germany, Italy and Taiwan, while small domestic crank machines for craft use are still produced in volume for retail.
Chinese clusters in Jiangsu, Zhejiang and Fujian hold the largest share by unit volume and set the price floor for entry-level equipment. Japanese and German builders concentrate on whole-garment platforms, precision needle systems and pattern software, where the premium is justified by gauge consistency and resale value. Italian builders dominate seamless and large-diameter circular machines, and Taiwanese manufacturers hold a strong mid-range circular position. Lead time, parts availability and the distance to a service engineer matter as much as the specification sheet here.
Ask for a trial knit with your own yarn and your own stitch structure, and insist that efficiency be defined in writing. A supplier who can name the efficiency assumption behind its daily figure is usually the one whose number will hold.
Request a witnessed trial on a representative pattern, and confirm whether the quoted speed is rated maximum or sustained over an eight-hour run. Ask whether the figure includes style changeover, what the acceptance test conditions are, and which spare needles and cam components ship with the machine.
Unattended running, operator ramp-up and delivery lead time are the three practical questions that decide whether a quoted daily output is achievable in your own factory.
Most modern machines can, within limits. Stop motions, yarn break detectors and automatic take-down keep a machine running after a fault, and networked models push alarms to a phone. The real constraint is package size: a fast machine empties its cones before morning, and a full fabric roll still needs a person. A realistic lights-out window is four to six hours, with one operator covering six to ten machines at night.
Loading, unloading and clearing basic stops take two to six weeks to learn, and most operators reach steady output within two months. Pattern programming is separate and typically takes three to six months to reach competence on complex jacquard work. Expect a 10 to 20 percent efficiency penalty in the first month of any new machine or style.
Standard flat and circular machines usually ship in 30 to 60 days from order confirmation, with 15 to 30 days of sea freight added for export. Commissioning takes one to three days per machine once utilities are ready, but stable efficiency takes another one to two weeks. Order spare needles with the machine, because one missing needle type can idle a line for a week.
