Quick answer: A drum mower is the cheaper, simpler, harder-to-break machine — roughly $3,500–$7,000 for a 6–7.5 ft cut, belt-driven, and almost indifferent to fire ant mounds, crawdad mounds and lodged hay. A disc mower costs roughly $8,000–$15,000, cuts 8 ft and wider, and covers ground far faster. Three things decide it for most small operations: drum mowers are heavy on the three-point (a 35 hp tractor can lift its own wheels off the ground), they leave a tight windrow you must ted rather than a wide swath, and blade life is crop-dependent — a set can go 60 acres in alfalfa but only 10 in coastal bermuda. If you cut under about 100 acres a year on rough ground with a 45–60 hp tractor, the drum mower is the honest answer. Above that, buy the disc.
Search "drum mower vs disc mower" and almost every page you land on is written by somebody who sells one of them. That is not automatically wrong, but it does shape the answer. Vendors will tell you drum mower blades last a full season. Farmers who own drum mowers will tell you what they actually got.
This guide is built the other way around — from what people who bought these machines reported afterwards, on public forums, with no dealer in the room. Where their experience conflicts with the sales copy, we say so. It is written for the operator cutting somewhere between 20 and 150 acres a year, on ground that may or may not be smooth, with one or two tractors under 75 hp. If you are running a 16 ft triple mower on 800 acres, this is not your article — the disc already won.
For the machine one step up from both, see our disc mower vs mower conditioner comparison. This page stays in the drum-versus-plain-disc lane.
What a drum mower actually is
A drum mower hangs two (occasionally three or four) large vertical drums off a beam. Each drum spins at roughly 1,900 rpm and carries three or four small blades at its base. Power comes down from the top, usually through a belt drive, and the cut material is thrown inward between the drums.
A disc mower does the opposite. Power runs along a low cutter bar through a sealed, oil-bath gear train, and a row of small discs — each with two free-swinging blades — spins just above the ground. The bar sits lower, cuts wider, and the crop falls more or less where it stood.
That single structural difference produces almost every practical trade-off below: where the weight sits, what happens when you hit a rock, how the crop lands, and what it costs.
| Factor | Drum mower | Disc mower |
|---|---|---|
| Typical cut width | 6–7.5 ft | 7–10 ft (and up) |
| Typical new price | $3,500–$7,000 | $8,000–$15,000 |
| Drive | Belt (absorbs shock) | Sealed gear train in oil |
| Weight on 3-pt | High and far back (~900 lb for a 6 ft) | Lower, closer to the tractor |
| Crop placement | Tight windrow — tedding usually required | Near-full-width swath |
| Blades per machine | 6–8 doing all the cutting | 12–20 sharing the work |
| Best fit | Under ~100 acres/yr, rough or obstacle-strewn ground | Higher acreage, timeliness matters more than purchase price |
The tractor question comes first, not last
This is the single most common surprise, and it has nothing to do with horsepower. A drum mower's mass sits high and well behind the lift arms. A 6 ft unit runs around 900 lb, and in the mowing position that weight is out to the side.
"It is heavy to lift on a 3 pt. Need a heavy tractor to keep 4 wheels on the ground when lifting the mower."
— hay wilson in TX · HayTalk thread 16072
He was not speaking hypothetically. Asked directly what tractor it takes, he gave the numbers from his own yard:
"Early on I had a 35 hp Allis Chalmers 5045. It could pull the mower no problem and it probably would have picked the mower up, with wheel weights and watered tires, but as I had it the left side tires would lift off the ground with the three point in lift position."
— hay wilson in TX · HayTalk thread 16072
Note what is being said: the 35 hp tractor had enough power. It did not have enough ballast. He reported no trouble lifting the same mower with a 50 hp Massey Ferguson.
Practical rule: plan on roughly 50 hp and 5,000 lb of tractor for a 6 ft drum mower, or budget for wheel weights and loaded rear tires on anything lighter. Check the rear-lift capacity in your operator's manual at the far end of the arms, not at the ball ends — that is where the published number usually gets flattering. The same weight-distribution logic we cover in tractor horsepower for a round baler applies here.
Blade life: the number nobody quotes you honestly
Here is where sales copy and field experience separate hardest. A drum mower has only six to eight blades doing all of the cutting, versus a dozen or more sharing the load on a disc bar. Fewer blades, same acres, faster wear.
One buyer reported what the salesman told him before delivery:
"Salesman said the blades are reversable and under reasonable conditions will last through 60 acres."
— Texasmark · HayTalk thread 16072
An owner in bermuda country answered in the same thread:
"In our bermuda, I'm lucky to get 10 acres cut on a set of blades, then I swap sides. I've never gotten more than about 25 acres out of a set of blades even after swapping them. The blades are inexpensive though. I just buy about 3 dozen before the season starts and a few more later if I need. Quality of cut and horsepower needs go way up as the blades dull."
— dubltrubl · HayTalk thread 16072
Both statements can be true. Sixty acres is plausible in clean alfalfa; 10 to 25 acres is what abrasive, sandy, close-cut warm-season grass does to a blade. A long-time owner running prairie hay, sorghum-sudan, bermuda and bahia reported roughly 40 acres per set before reversing — right in the middle. Bermudagrass is grown on sandy soils across much of the Southeast and is typically cut low and often, which is precisely the combination that eats edges; the University of Georgia's Extension forage resources cover regional management for it.
The mitigating fact is cost. Blades run about $1 each, are reversible, and swap in well under a minute on most machines. Six blades at a dollar apiece is not a budget line. But it does mean a drum mower is a machine you maintain during the day, not one you sharpen in March and forget.
The comparison that matters is against a disc bar on the same farm. One owner who bought a Kubota/Vicon disc after running a drum put it plainly:
"The blades don't last (6 blades do all the cutting) compared to the Kubota/Vicon cutter I just got. I've done 20 acres and they look unused."
— davang · HayTalk thread 23071
Cutting height is your other lever here — mowing at 3 in instead of scalping at 1.5 in keeps blades out of the dirt and keeps the stand alive. We work through the agronomy in hay cutting height.
The windrow problem is the real functional difference
If you take one thing from this page, take this. A drum mower does not lay a swath. It throws the crop inward into a rope, and that rope dries slowly.
"One warning they make a super tight windrow and you must ted."
— davang · HayTalk thread 23071
"I do not like it leaving a windrow! I want to leave the hay out in a wide swath to give the sun as much hay as possible to work on."
— hay wilson in TX · HayTalk thread 16072
This is not a preference argument — it is measurable. University of Wisconsin-Madison Extension research on field drying forage for hay and haylage found alfalfa laid in a swath covering about 70% of the cut width can reach the 65% moisture mark in 6–8 hours, while the same crop in a narrow windrow at 25–30% of cut width may take 24 hours or more. Wide swaths keep leaf stomates open longer, so the plant loses water fast instead of burning sugars through prolonged respiration.
A drum mower puts you at the wrong end of that curve by design. That is survivable, and thousands of people survive it, but it means the tedder is not optional equipment — it is part of the purchase price. Budget for one in the same breath. Our hay tedder guide covers sizing, and wide swath vs narrow windrow covers the drying math in more depth.
One experienced operator described the workaround honestly — ted immediately, and let volume do the rest:
"That was my solution. I would use the tedder as soon as I finished mowing. I might use the tedder more than one time but never more than one time a day."
— hay wilson in TX · HayTalk thread 16072
There is a minority view worth recording. Operators with sharp field corners, sickle-bar habits, or a need to see the cut/uncut line clearly sometimes prefer the windrow, because the entrance into standing grass stays clean and clump-free. If you were going to ted anyway, the drum mower's windrow costs you less than it looks.
Durability: belt drive versus a gear case full of oil
Drum mowers earn their reputation here, and the forum evidence supports it.
"I didn't like the disc setup with the oil and the drive gearing. I looked at several to buy used and everyone had braze marks on the lower side of the mower where cracks developed and the oil ran out."
— Texasmark · HayTalk thread 16072
"The drum mower I am purchasing is belt driven which absorb a tremendous amount of shock that a geared system won't. The blades are $1 ea and uses 6 which can be swapped from side to side to use both cutting surfaces."
— Texasmark · HayTalk thread 16072
A belt can slip. A gear train cannot — it transmits the shock straight into a casting that sits two inches off the ground. That is why used disc mower bars so often carry weld or braze repairs along the bottom, a failure we cover in disc mower troubleshooting.
The longevity ceiling is genuinely high. One owner reported a PZ Zweegers CM212 bought new in 1989 and still cutting:
"Only problems I've had were worn out u joints and yokes and wore out a set of skid saucers underneath... Did finally burn out the input gear set a few years back but that's the only time the gearcase has been touched in nearly 25 years..."
— luke strawwalker · HayTalk thread 23071
Drum mowers are also notably tolerant of the things that stop other machines. Multiple owners reported cutting straight through fire ant mounds, crawdad mounds, smutgrass and bunch grass without clogging, and through down or lodged hay that gives a sickle bar fits. If your fields are rough enough that you have considered a land plane — see smoothing rough hay fields — that tolerance is worth real money.
The safety issue the brochures leave out
Drum mowers throw rocks. This came up independently from the same owner across two years and two threads, and it is not a small hazard:
"Last season it threw a rock up at the tractor and shattered the right rear corner window of my Kubota cab. It was headed straight for my head!"
— davang · HayTalk thread 16072
The mechanism is straightforward. Blades on a drum mower travel a large radius at about 1,900 rpm and release anything they strike on a tangent that is aimed up and back toward the tractor, not down. Disc mowers are not immune, but their discs are smaller, lower, and shrouded closer to the ground.
What to do about it:
- Keep the factory canvas or rubber curtains on and in good condition. They are not decoration — a torn curtain is the difference between a deflected rock and a projectile.
- Walk or drive new ground before the first cut and pick up loose stone, especially near lanes, gateways and old building sites.
- Run with the cab closed, or wear eye protection on an open station.
- Keep bystanders and helpers well behind and to the side — never in the throw arc.
Penn State Extension's hay production resources are a good general refresher on harvest-equipment safety practice before your first season with any new mower.
Cut height, ground following and mud
A drum mower rides on skid saucers under each drum and sets its height by tilt, not by a lift setting. That makes a hydraulic top link close to essential.
"Very easy to maneuver, it rides the ground so your height adjustment is actually the tilt so get a hydraulic top link, makes it a breeze to adjust."
— davang · HayTalk thread 16072
Stock skid saucers typically put the blades about 2 in off the ground. Spacers can raise that to about 3 in. One buyer reported his dealer had tried 4 in of spacing and it "didn't work well" — beyond roughly 3 in, the drum starts to lose the ground reference that makes it work.
If you need a genuine 4 in stubble for stand health or for stockpiling, a drum mower will fight you. That is a real limitation for tall fescue and for anyone managing regrowth aggressively — Michigan State University's forage program is a good reference on residual height and regrowth for cool-season stands.
Wet clay is the other caveat:
"I was cutting real thick rye and it was wet and the ground was uneven so the blades picked up a fair amount of wet dirt which caused them to stick and not turn freely."
— Texasmark · HayTalk thread 16072
Speed, width and the case for the disc
Drum mowers are not slow in the field. Owners reported cutting at 11 mph routinely and up to 15 mph, and another ran his 7.5 ft machine at 6 mph behind a 70 hp tractor in everything from prairie hay to bahia. Ground speed is not the constraint.
Width is. A 6 ft drum against an 8 ft disc is a 33% difference in acres per hour at identical speed, every single pass, forever. On 30 acres that is an afternoon. On 150 acres it is days you do not have in a wet June.
The clearest statement of the counter-case came from someone who considered a drum and bought a disc anyway:
"In my opinion if you have a tractor that will handle a 8' disk mower then this is the route I would go."
— tnwalkingred · HayTalk thread 16072
That is the honest decision rule, and it is worth stating plainly: if you already own a tractor that will comfortably run an 8 ft disc mower, and you can afford one, buy the disc. The drum mower's advantages are real but they are mostly advantages of price, simplicity and toughness — not of throughput.
A 10-minute decision worksheet
Answer these before you call a dealer. Three or more "yes" answers in the drum column means the drum mower is probably right for your operation.
| Question | Points to drum | Points to disc |
|---|---|---|
| How many acres do you cut per year? | Under 100 | Over 100 |
| Biggest tractor available? | 45–65 hp, well ballasted | 70 hp+ |
| Ground condition? | Rough, mounds, stumps, lodged crop | Smooth and clean |
| Do you already own a tedder? | Yes | No, and don't want one |
| Weather window in your area? | Reliable 3–4 dry days | Tight, unpredictable |
| Do your own repairs? | Yes, and dealer support is thin | Prefer a dealer 20 minutes away |
| Required stubble height? | 2–3 in is fine | Need a true 4 in |
| Equipment budget? | Under $7,000 | $8,000+ |
If you are assembling a hay outfit from scratch and the mower is only one of several decisions, work through how to start a hay operation first — the mower choice is easier once the baler and the acreage are settled.
Brands you can actually buy in North America
The drum mower market in the United States is smaller and more importer-driven than the disc market, which is worth knowing before you fall in love with a model. Names that come up repeatedly among North American owners include CCM, HayMAG, Kuhn, Galfre, Enorossi, SaMASZ, Befco, Fort, Tonutti and Fella, plus vintage PZ Zweegers machines still working after three decades. Several are European or Turkish-built and rebadged by a regional importer.
Two practical consequences:
- Confirm parts availability before you buy. Blades, skid saucers, belts and u-joints are the wear items. Ask the seller what is on the shelf, not what can be ordered.
- Ask who honors the warranty if the importer changes hands. Two-year warranties were common on new units, but a warranty is only as good as the entity behind it.
Oregon State University's Forage Information System is a useful neutral starting point for regional forage and harvest guidance while you shop.
Frequently asked questions
Is a drum mower better than a disc mower?
Neither is better outright. A drum mower is cheaper, simpler and more tolerant of rough ground and lodged crops, but cuts narrower and leaves a tight windrow. A disc mower cuts wider and faster and lays a better swath, but costs roughly twice as much and its low gear case is vulnerable to rocks and stumps.
How much horsepower does a 6 ft drum mower need?
Power is rarely the limit — 40 hp will usually turn a 6 ft drum mower. Lift capacity and ballast are the real constraints, because the roughly 900 lb machine hangs high and behind the arms. Owners report a 35 hp tractor lifting its own wheels off the ground, while a 50 hp tractor handled the same mower fine.
How long do drum mower blades last?
It depends almost entirely on the crop. Owners report about 60 acres per set in clean alfalfa, roughly 40 acres in mixed prairie and bahia, and as little as 10 to 25 acres in abrasive coastal bermuda even after reversing the blades. Blades cost roughly $1 each and swap in under a minute, so keep several dozen on hand.
Do you have to ted hay after a drum mower?
Almost always, yes. Drum mowers throw the crop into a narrow rope roughly 25–30% of cut width, and University of Wisconsin research shows that dries far slower than a 70% swath — 24 hours or more versus 6 to 8. Plan on tedding immediately after mowing and treat the tedder as part of the mower's purchase price.
Can a drum mower cut down or lodged hay?
Yes, and this is one of its genuine strengths. Because the drums lift and feed material inward rather than relying on a low reciprocating bar, owners report cutting cleanly through lodged hay, wet rye, fire ant mounds, crawdad mounds, smutgrass and bunch grass that would plug a sickle bar.
Are drum mowers dangerous?
They carry a real thrown-object risk. The large cutting radius releases stones upward and rearward toward the operator — one owner had a rock shatter the rear corner window of a tractor cab. Keep the curtains intact, clear loose stone from new ground, run with the cab closed or eye protection on, and keep bystanders out of the throw arc.
How much does a drum mower cost?
New 6 to 7.5 ft two-drum machines generally run about $3,500 to $7,000 depending on brand and width, against roughly $8,000 to $15,000 for a comparable disc mower. Price is the drum mower's clearest advantage, and the gap widens once you account for cheaper blades and simpler repairs.
The bottom line
The drum mower versus disc mower question resolves cleanly once you stop treating it as a quality comparison. A drum mower is a low-capital, high-tolerance, narrow machine that asks you to own a tedder and keep blades in the toolbox. A disc mower is a higher-capital, higher-throughput machine that asks for smoother ground, more tractor and a dealer.
Under about 100 acres a year, on ground that punishes equipment, with a well-ballasted 45–65 hp tractor and a tedder already in the shed — buy the drum mower and do not feel like you compromised. Above that, or if timeliness in a narrow weather window is what actually costs you money, the extra width pays for itself.
Whichever you cut with, the crop still has to get baled and stored. If round bales are the end of your chain, our guides to making dry hay faster and rake selection cover the next two steps — and we manufacture the net wrap that finishes the job.
Featured photo: Fella KM 3140 FP-V drum mower behind a Massey Ferguson 5450 tractor by MsHarvestE, licensed under CC BY-SA 3.0, via Wikimedia Commons.
