The picks
Best Yarn for Machine Knitting
Your hands can cope with almost any yarn. A machine cannot, and it will tell you by dropping the whole row.
By Sawyer V. · Published September 27, 2026
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The short answer
Use a smooth, evenly spun acrylic or acrylic blend in DK to worsted weight. A circular knitting machine needs yarn that feeds without catching, and that rules out anything with a halo, a pile, slubs or a loose twist. Check your machine's published yarn range before buying - addi specifies 3.5mm to 8mm yarn thickness for the Express Kingsize - and wind from a center-pull ball or cone so the yarn arrives without twisting.
What to look for
Machine knitting inverts a lot of hand-knitting advice. The yarn a machine likes is the yarn your hands find boring, and the yarn you enjoy by hand is often the one that jams.
- A smooth surface. Anything fuzzy, hairy or piled catches on needles and gate pegs. Mohair and chenille are the classic jams.
- A consistent diameter. Thick-and-thin art yarn is a machine's nightmare: the thick sections will not pass and the thin ones drop.
- A firm twist. A loosely spun yarn snags and splits under the carriage, where you cannot see it happening until the row is ruined.
- The weight your machine publishes. addi states 3.5mm to 8mm yarn thickness - roughly DK to super bulky - for the Express Kingsize. Outside that range is a fight.
- A center-pull ball or a cone. Yarn dragged off the outside of a ball adds twist, and twist is what makes a feeder skip.
- Enough strength to take tension. The carriage pulls harder and more consistently than your hands do, and a weak single will break.
| # | Product | Best for | Fiber | Yards/skein | Price |
|---|---|---|---|---|---|
| 1 | Caron Simply SoftSmooth, consistent and slippery - which is a fault by hand and a virtue in a machine. | Long machine runs that do not snag | 100% acrylic | 315yd / 170g | $14.55 - View on Amazon#ad disclosure - price as of September 27, 2026 |
| 2 |  Red Heart Super SaverThe most yardage per skein here, consistently spun, and no dye lot to track. | Making a lot of the same thing | 100% acrylic | 364yd / 198g | $4.29 - View on Amazon#ad disclosure - price as of September 27, 2026 |
| 3 |  Lion Brand Wool-EaseEnough wool to matter, enough acrylic to behave in a feeder. | Machine-made hats that need to be warm | 80% acrylic, 20% wool | 197yd / 85g | $11.77 - View on Amazon#ad disclosure - price as of September 27, 2026 |
| 4 |  Bernat Softee BabyA DK acrylic that sits comfortably inside the published yarn range. | Machine-made baby hats | 100% acrylic | 362yd / 140g | $23.48 - View on Amazon#ad disclosure - price as of September 27, 2026 |
| 5 |  Bernat BlanketChenille and a feeder are natural enemies. | Hand crochet, where it is genuinely lovely | 100% polyester chenille | 108yd / 150g | $20.96 - View on Amazon#ad disclosure - price as of September 27, 2026 |
Caron Simply Soft
Caron · Best for long machine runs that do not snag
A softer, shinier acrylic worsted with noticeable drape - which is exactly why it is a poor choice for anything that needs to hold a shape.
- Fiber
- 100% acrylic
- Weight
- 4 Medium / worsted
- Skein
- 6oz / 170g, 315yd / 288m
- Gauge
- 18 sts x 24 rows on 5mm (US 8)
- Hook
- 5mm (US H/8), 13 sc x 14 rows
- Care
- Machine wash cool, dry flat, no bleach
Who it suits
Anyone making hats or tubes on a circular machine and tired of dropped stitches.
Why it is here
100% acrylic, worsted, 315yd per 170g skein, 18 sts x 24 rows on 5mm. The slick surface and even diameter that make it split under a hand-held hook are exactly what a feeder wants: nothing to catch on, no thick and thin sections to jam the gate pegs.
What you give up
Its band says dry flat rather than tumble dry, which is a nuisance for the hats machines are usually used to mass-produce. It also pills like most acrylics.
Specifications from Yarnspirations product page. We have not handled this item - see how we pick.
Red Heart Super Saver
Red Heart · Best for making a lot of the same thing
The 7oz workhorse acrylic. Coarser than the softer acrylics here, and the cheapest yardage on the shelf by a distance.
- Fiber
- 100% acrylic
- Weight
- 4 Medium / worsted
- Skein
- 7oz / 198g, 364yd / 333m (no-dye-lot solids)
- Gauge
- 17 sts x 23 rows on 5mm (US 8)
- Hook
- 5.5mm (US I/9), 12 sc x 15 rows
- Care
- Machine wash warm gentle, tumble dry low, no bleach
Who it suits
Anyone producing hats in quantity - for gifts, for charity or to sell.
Why it is here
100% acrylic, worsted, 364yd per 198g, 17 sts x 23 rows on 5mm, with no dye lot on the solids. Machines eat yardage quickly, and a consistent diameter across an entire large skein is worth more here than softness.
What you give up
Firmer and squeakier than Simply Soft, and slightly grabbier through the feeder as a result. It softens after washing rather than before.
Specifications from Yarnspirations product page. We have not handled this item - see how we pick.
Lion Brand Wool-Ease
Lion Brand · Best for machine-made hats that need to be warm
An 80/20 acrylic-wool worsted that machine washes and dries, and is the single most sensible first step away from all-acrylic.
- Fiber
- 80% acrylic, 20% wool (solids, heathers, twists)
- Weight
- 4 Medium / worsted
- Skein
- 3oz / 85g, 197yd / 180m
- Sold as
- Single skein on the listing we link
- Gauge
- 18 sts x 24 rows on US 8 (5mm)
- Hook
- J-10 (6mm), 13.2 sc x 16 rows
- Care
- Machine wash, water not above 105F; machine dry
Who it suits
Anyone whose machine-knitted hats are going somewhere cold.
Why it is here
80% acrylic and 20% wool, worsted, 197yd per 85g, 18 sts x 24 rows on US 8 (5mm), machine wash and machine dry. The acrylic majority keeps the yarn smooth and consistent, which is what the machine needs, while the wool adds warmth a pure acrylic does not have.
What you give up
85g skeins mean frequent joins, and every join is a chance for the machine to drop a stitch. The wool content also makes it grabbier than pure acrylic.
Specifications from Lion Brand product page. We have not handled this item - see how we pick.
Bernat Softee Baby
Bernat · Best for machine-made baby hats
A DK-weight acrylic with 362 yards to the 140g ball - the practical default for anything a baby will wear and a parent will wash constantly.
- Fiber
- 100% acrylic
- Weight
- 3 DK / light
- Ball
- 5oz / 140g, 362yd / 331m (solids)
- Gauge
- 22 sts x 30 rows on 4mm (US 6)
- Hook
- 4mm (US G/6), 16 sc x 19 rows
- Care
- Machine wash cool, dry flat
Who it suits
Anyone turning out newborn hats, which is what these machines are bought for most often.
Why it is here
100% acrylic, DK / light, 362yd per 140g ball, 22 sts x 30 rows on 4mm. DK is at the fine end of what these machines handle, and a smooth DK acrylic produces a hat fine enough for a newborn without straining the carriage.
What you give up
Finer yarn is less forgiving on a machine - tension problems that a worsted absorbs will show as dropped stitches in DK. Its band also says dry flat.
Specifications from Yarnspirations product page. We have not handled this item - see how we pick.
Bernat Blanket
Bernat · Best for hand crochet, where it is genuinely lovely
Polyester chenille at 108 yards to a 150g ball. Fast, warm, machine washable, and it will shed and worm if the tension is loose.
- Fiber
- 100% polyester (chenille)
- Weight
- 6 Super Bulky
- Ball
- 5.3oz / 150g, 108yd / 98m
- Gauge
- 8 sts x 13 rows on 8mm (US 11)
- Hook
- 8mm (US L/11), 7 sc x 8 rows
- Care
- Machine wash delicate, tumble dry gentle
Who it suits
Not machine knitters. By hand, on a large hook, it is a perfectly good blanket yarn.
Why it is here
100% polyester chenille, category 6 super bulky, 108yd per 150g ball, 8 sts x 13 rows on 8mm.
What you give up
Two problems at once. It is super bulky, which is at or beyond the top of what these machines accept - addi publishes a recommended range of 3.5mm to 8mm yarn thickness for the Express Kingsize. And the chenille pile catches on the needles and gate pegs, which jams the carriage. See [best hook for chenille yarn](/crochet-hooks/best-hook-for-chenille-yarn) for where it does belong.
Specifications from Yarnspirations product page. We have not handled this item - see how we pick.
What jams a machine
- Chenille, whose pile catches on everything metal.
- Mohair and anything with a halo, for the same reason - see mohair vs merino.
- Boucle, slub and art yarns, where the diameter changes constantly.
- Very fine yarn on a bulky machine, which drops off the needles instead of sitting on them.
- Super bulky on any circular machine, which is at or past the top of the published range.
- Wool that felts, if the tension is tight enough to abrade it in the feeder.
The machines themselves
The two circular machines this site lists give a sense of the range. The SENTRO 48-needle has 48 needles with 22, 32 and 40 needle models also made, and works in tube or flat panel mode. The addi Express Kingsize has 46 needles, a mechanical row counter, and publishes that recommended 3.5mm to 8mm yarn thickness.
Needle count sets the circumference, which sets what you can make - a 22-needle machine makes a preemie hat and a 48-needle machine makes an adult one. Best knitting machines for beginners covers choosing between them.
How we picked
Every yarn here is one we already list, ranked on the properties a feeder actually cares about - surface smoothness, consistency of diameter, twist and weight - using the manufacturers' published specifications and the machine makers' own published yarn ranges. We have not run these yarns through a machine; this site does not test products.
What we would buy
- Smoothest feed: a slick worsted acrylic.
- Volume: the biggest skein with no dye lot.
- Warmth: 80/20 acrylic and wool.
- Newborn hats: a smooth DK acrylic.
- Not on a machine: chenille blanket yarn.
Questions people actually ask
What yarn works best in a circular knitting machine?
A smooth, evenly spun acrylic or acrylic blend in DK to worsted. Machines need a consistent diameter and nothing fuzzy to catch on, which is why plain acrylic outperforms nicer hand-knitting yarns here.
What weight yarn can a knitting machine take?
Check the maker's figure. addi publishes a recommended 3.5mm to 8mm yarn thickness for the Express Kingsize, which is roughly DK to super bulky. Outside the published range you will fight the machine on every row.
Why does my knitting machine keep dropping stitches?
The commonest causes are yarn that catches, yarn outside the machine's weight range, and twist introduced by pulling from the outside of a ball. Wind a center-pull cake first - it fixes more problems than changing yarn does.
Can you use chenille or blanket yarn in a knitting machine?
No. Chenille pile catches on the needles and gate pegs, and super bulky is at or beyond the top of what circular machines accept. It is a hand-crochet yarn.
Is wool yarn bad for knitting machines?
Wool blends with a smooth surface are fine - an 80/20 acrylic-wool feeds well. Pure wool that felts can abrade in the feeder under tension, and anything with a halo will catch.
Sources
- Craft Yarn Council - Standard Yarn Weight System
- Yarnspirations - Caron Simply Soft specification
- Yarnspirations - Red Heart Super Saver specification
- Lion Brand - Wool-Ease specification
- Yarnspirations - Bernat Softee Baby specification
- Yarnspirations - Bernat Blanket specification
- addi Express Kingsize knitting machine - retail specification
- SENTRO knitting machine user manual