You're shopping for a round baler and the salesman keeps steering you toward the model with knives — the "crop cutter," "precutter," or "XtraCut" rotor that chops the forage as it feeds in. It costs more, it eats horsepower, and the knives are one more thing to maintain. So the question every buyer asks on the forums is the same: is a round baler precutter actually worth it, or is it a feature you'll pay for and never use?
The answer from producers who run them every season is refreshingly clear: a precutter is rarely needed for plain dry hay, but it's close to essential if you make baleage or feed bales through a mixer wagon. Here's what the knives really do to your bales, where they pay off, where they cost you, and the one thing every cutter-baler owner warns about — your net wrap.
Quick answer: A precutter (crop cutter) round baler runs the crop across a bank of knives as it enters the chamber, chopping it into roughly 2.5–4 inch pieces. Benefits: denser, heavier bales, easier feeding (especially into a TMR mixer), and less feed-out waste. Costs: it draws more tractor power, can knock leaves off dry alfalfa, and the knives are a maintenance item. Most owners skip the knives on dry grass hay and run them for baleage, straw/bedding, and anything fed in a mixer. One universal caveat: chopped material makes a bale that wants to explode when the net comes off — so a cutter baler needs plenty of good net wrap, and owners say the brand of net matters.
What a precutter actually does to the bale
A standard round baler rolls long, intact forage. A precutter (also called a crop cutter, cutter rotor, or chopping baler) forces that forage past a row of stationary knives — anywhere from 7 to 25 of them depending on the machine — so it's cut to a set length before it's rolled. Shorter pieces pack tighter, so the headline benefit is density: more crop in the same-size bale. Producers baling straw routinely report 20–30% heavier bales with the knives engaged.
The second benefit is feeding. Chopped forage flows and mixes far better, which is why the strongest endorsements come from people who feed what they bale:
"If it were within my power to do so, all dry hay I get would have gone through a cutter baler. Between a cutter baler and the right mixer wagon, the hay grinder would be a thing of the past without question. Almost all the hay I use goes through a mixer wagon."
— Gearclash, HayTalk · Opinions of Crop Cutter Balers
Another long-time producer put the decision in one line — and it's the rule most owners land on:
"Round or square? Neither are needed for hay. Both are preferable for silage — particularly in rounds if feeding into a mixer wagon."
— Hay diddle diddle, HayTalk · Opinions of Crop Cutter Balers
Where a precutter pays off
- Baleage / silage: Chopping helps wet forage pack and ferment, and chopped baleage drops into a mixer cleanly. This is the #1 reason producers buy knives.
- Feeding in a TMR / vertical mixer: Pre-chopped hay loads and blends in a fraction of the time and saves wear on mixer knives. Several owners say a cutter baler plus a mixer replaces a standalone bale grinder.
- Reducing feed-out waste: The original reason many buyers look at knives is the pile of wasted long hay around a bale ring. Cut hay is harder for cattle to grab and fling:
"My dry hay gets fed in bale rings and the waste with longer grass and stuff drives me crazy... running the knives would really cut down on the amount they can pull out and waste."
— Nathan, AgTalk · Question for those who run round balers with knives
- Straw and cornstalk bedding: Cut straw is denser to haul and breaks apart easily when bedding. Many owners run a partial knife set (say 7–8 of 15) for bedding so it's shortened but not powder.
Where a precutter costs you
The knives aren't free in horsepower, leaf retention, or upkeep — and forum veterans are blunt about it.
More power, and reduced capacity in dry hay. The rotor and knives add drag, most noticeably when the crop is dry:
"I've been told that the crop cutter is hard on dry alfalfa, tends to knock a lot of leaves off if it starts to get a little on the dry side. Service manager at our local dealership seemed to think the crop cutter reduces capacity in dry hay."
— mlappin, HayTalk · Teach me all about NH crop cutter balers
The good news is that on virtually every modern cutter baler the knives retract hydraulically, so you can pull them out of the crop flow when you don't want them. An owner running a New Holland crop cutter explained how he varies it by crop:
"Yes the knives do retract hydraulically. Running all 15 knives I notice it draws more power with dry hay... We use only 7 knives when we bale our sorghum sudangrass, even with really heavy windrows it doesn't really slow down. The drop floor is a really great feature also — I have yet to get out of the tractor to unplug the pickup."
— Northeast PA hay and beef, HayTalk · Teach me all about NH crop cutter balers
That "drop floor" point is a real bonus of cutter balers most buyers overlook: when the rotor plugs, you drop the floor from the cab instead of climbing down to clear it.
Maintenance. Knives are a wear-and-trouble item — they need sharpening, springs and trip protection can fail, and they add complexity:
"We don't run our knives in much, typically the stuff is small enough for our liking... The knives are a high maintenance item; every problem we've had with our JD 582 have been with the knives."
— Counter5, AgTalk · Round balers with knives thread
Knives in vs. knives out: quick comparison
| Factor | Knives engaged (precutter) | Knives retracted / no cutter |
|---|---|---|
| Bale density / weight | Higher — often 20–30% heavier in straw | Lower; long, springy material |
| Feeding in a mixer | Excellent; loads and blends fast | Slow; may need a grinder first |
| Feed-out waste | Lower; harder to pull out and fling | Higher with long grass in a ring |
| Tractor power | More PTO load, esp. in dry hay | Lower; faster ground speed |
| Dry alfalfa leaf loss | Can shatter leaves if too dry | Gentler on dry, leafy hay |
| Maintenance | Sharpen/replace knives; more parts | Fewer wear items |
| Net wrap demand | Higher — chopped bales expand hard | Standard wrap count |
A practical middle ground many owners use: match the number of engaged knives to the job. Run the full bank for fine-cut baleage headed to a mixer, a partial set for straw and bedding, and pull them entirely for dry, leafy hay where speed and leaf retention matter more than chop length.
The net wrap warning every cutter-baler owner repeats
This is the part that lands squarely in our wheelhouse, and it's the single most repeated caution about precutters on the forums: chopped forage makes a bale with far less internal structure, so it expands violently when the net is cut. Long hay holds itself together in a mat; short, cut pieces have nothing to interlock, so the bale is relying almost entirely on the net wrap to stay a bale at all. Listen to a producer who learned it the hard way:
"When you run the knives you are sizing stuff down, which in turn degrades the structural integrity of the bale. Use plenty of net and watch your weight on wet hay. They WILL explode. Ask me how I know. Cut hay has a tendency to explode when you take the net off, so it's easy for them to just push it out of the ring."
— Nathan, AgTalk · Question for those who run round balers with knives
And it isn't only about how much net you use — owners are adamant that which net you use changes the outcome on chopped, heavy bales:
"You don't want to skimp on netwrap. However, I also believe the type of netwrap used makes a big difference. I don't believe we have had a single bale open up when it shouldn't since we started using [good] netwrap."
— ClaasMN, AgTalk · Round balers with knives thread
Two things make or break a chopped bale: enough wraps and net that reaches the bale's full width and grips the shoulders so the dense, short material can't escape past the edges. If you're stepping up to a cutter baler — especially for heavy baleage — this is the wrong place to run thin, narrow, or bargain net. Our guides to how many wraps per bale and choosing the best bale net wrap cover the count and the quality side; if you're already seeing the net give way on chopped bales, start with net wrap tearing when baling.
The payoff cuts both ways, too: get the wrap right and the same chopping that reduces feed-out waste also keeps the bale tidy right up to the ring. As one owner noted, fine hay that slips through ends up in the "moat" of the feeder where cattle get a second pass at it — but only if the bale held together cleanly until then, which is the net's job.
So — is a round baler precutter worth it?
- Make baleage, or feed through a mixer? Yes — buy the knives. The denser bales and clean mixing pay for the feature.
- Feed dry hay in rings and fight waste? Probably worth it, but try better feeder rings first; knives help but they're not the only fix for waste.
- Sell dry, leafy alfalfa hay? Usually not — the leaf shatter and lost capacity outweigh the benefit, and you'd run the knives retracted most of the time anyway.
- Bale a lot of straw/stalks for bedding? A partial knife set adds useful density without turning it to dust.
And whichever way you go, size your net wrap to the bale you're actually making. A cutter baler builds a heavier, hungrier-for-net bale than a standard machine — plan the wrap accordingly. If wet, heavy baleage is the goal, pair this decision with our silage special baler and first-time baleage guides.
Frequently asked questions
Is a round baler precutter worth it?
For baleage or anything fed through a mixer wagon, yes — the knives make denser, easier-to-feed bales and reduce feed-out waste. For dry, leafy hay you sell, usually not, because the cutter draws more power, can shatter alfalfa leaves, and reduces capacity. Most owners run the knives for silage and bedding and retract them for dry hay.
Do precutter knives make round bales heavier?
Yes. Chopping the crop into short pieces lets it pack tighter, so a cutter baler puts noticeably more material in the same-size bale — producers commonly report 20–30% heavier straw bales with the knives engaged. The trade-off is higher tractor power demand and more strain on the net wrap holding that denser bale together.
Can you turn the knives off on a crop cutter baler?
On nearly all modern cutter balers, yes — the knives retract hydraulically out of the crop flow, so you can bale uncut whenever you want. Many owners also engage only part of the knife bank (for example 7 of 15) to get a coarser cut for straw and bedding while saving power and reducing leaf loss.
Do chopped (precut) bales need more net wrap?
Yes — this is the most important caveat. Cut forage has little internal structure, so the bale relies on the net wrap to hold together and will expand hard when the net is cut. Use extra wraps and full-width, good-quality net that grips the bale's shoulders; under-wrapping or narrow net on chopped bales is a common cause of bales that burst open.
How much horsepower does a precutter baler need?
More than a non-cutter baler, and it varies by knife count and crop. The finer the chop (more knives, dry crop), the higher the PTO load. Owners notice the biggest draw running a full knife bank in dry hay; in baleage the extra load is less noticeable. Check the specific model's PTO horsepower recommendation against your tractor.
This guide is maintained by the XES Netting team — a bale net-wrap manufacturer. Producer comments are quoted verbatim with a thread link so you can read the originals; one quote is lightly bracketed where a brand name was used. Settings and figures are as stated by farmers in those threads — verify against your own machine's manual. Hero photo: round baler and net-wrapped bale stack by JLPC (CC BY-SA 3.0, Wikimedia Commons).
