Disk, cylindrical or orbital: which floor scrubber head suits your floor?
Disk heads spin flat pads or brushes slowly, around 120 to 220 RPM on most machines, with high down pressure, so they suit smooth floors, polishing and stripping. Cylindrical heads spin roller brushes, usually two turning in opposite directions, at much higher speeds and pick up light debris as they scrub, so they suit grout, texture and uneven floors. Orbital heads oscillate and strip finish without chemicals.
The scrub head is the one part of an auto scrubber you cannot change your mind about later. The machine style, the battery and the squeegee are all replaceable later on. The deck is chosen once, and if it is wrong for your floor you will feel it every shift for the next eight years.
What are the three scrub head types?
Disk heads
A disk head spins one or more flat, round pads or brushes against the floor, with solution fed down through the center. The speed is low, around 120 to 220 RPM on most of the disk machines we carry, and the trade is deliberate: what you lose in rotation you gain in down pressure.
That pressure is why disk decks keep the jobs that need force rather than speed. Stripping finish, cutting through built-up soil and polishing back to a shine all stay disk work, whichever machine style you end up buying.
Cylindrical heads
A cylindrical head scrubs with roller brushes instead of flat pads. Most machines use two rollers turning in opposite directions, though some compact units, like the Clarke MA10 12E and the Powr-Flite CAS16, run a single roller. Brush speed varies widely, from about 450 RPM on the Tornado BR 13/2 to 1,300 RPM on the Tornado BR 18/11, well above the 120 to 220 RPM of most disk decks we carry.
The rollers also flick loose debris off the floor as they scrub. Machines like the Clarke Focus II Cylindrical and the Tornado BR 13/2 catch it in a removable tray you empty after the run, while CRB machines like the Tornado Vortex and NaceCare Duplex carry it into the recovery tank with the dirty water. Either way, a cylindrical deck scrubs and picks up light debris in one pass, which is why it earns its place in warehouses, food plants and parking structures where your crew has no time to sweep first. On grouted floors, it's also the deck whose bristles reach into the joints, as our guide to cleaning commercial tile and grout explains.
Orbital heads
An orbital head does not rotate at all. It holds a rectangular pad and shakes it in tight, fast circles, so the square corners reach closer to your walls than any round deck can.
The pattern matters more than the speed. Because the pad never traces the same arc twice, an orbital deck removes floor finish with water and a prep pad, so you can strip without chemicals and keep the same machine for daily cleaning. Our floor scrubber checklist covers orbital deck maintenance along with the rest of the machine.
Why do published speeds for orbital decks contradict each other?
If you compare spec sheets you will find orbital heads listed anywhere from under 400 to over 2,000. Both figures are printed in good faith, and both are right, because they are not measuring the same motion.
A disk or cylindrical figure counts rotations of a brush. An orbital figure counts strokes of a pad, which is a different motion over a different distance. Putting both in one column marked RPM is what creates the clash you are looking at.
So never set an orbital number against a disk or cylindrical one. Compare orbital machines only with other orbital machines, and judge disk against cylindrical on down pressure and debris handling rather than on the speed figure in your table.
One more correction worth making, because it circulates widely. Disk decks are the slower of the two rotating types, not the faster. If you read that disks spin quicker than cylindrical rollers, the figures have been swapped.
Which head suits which floor?
| Your floor | Best head | Why |
|---|---|---|
| VCT, sheet vinyl, polished concrete | Disk | Flat contact and down pressure for shine and stripping |
| Quarry tile, grout lines, safety flooring | Cylindrical | Bristles drop into the texture instead of bridging it |
| Rubber studded, epoxy, laminate | Cylindrical | Follows an uneven profile without skipping |
| Corners, edges, finish removal | Orbital | Square pad reaches the wall, strips without chemicals |
| Mixed hard floor and carpet | Cylindrical | Handles both without a deck change |
Experienced custodians reach the same conclusion without being prompted. On cleaning forums, when someone describes a textured, grouted, rubber or epoxy floor, the answer comes back cylindrical from several people independently, well before anyone asks what the budget is. For rubber gym flooring in particular, see our guide to the best machine to clean a gym floor. Wood courts are different, and our guide to wood gym floor maintenance explains when a pad-driven or orbital scrubber belongs on one.
There is a catch that most buyers miss. On textured floors, stiffer bristles are not automatically better, because a hard brush rides across the high points instead of dropping into the low spots. Bristle grade is a separate choice from deck type, and on your floor harder does not mean cleaner.
Do you still need to sweep first?
Mostly yes, and the honest answer is more useful to you than the marketing one.
A cylindrical deck does pick up light debris, and it will save you the dust-mop pass on a floor with scattered grit. It will not save you from cardboard, shrink wrap, bolts or standing water. Crews who run them still sweep the heavy areas out of habit, because a clogged recovery path costs more time than the sweep saved.
Disk decks have no debris pickup at all. If your floor has anything loose on it, the grit goes under the pad and gets ground into the finish. The prep routine is in our guide on how to use a floor scrubber.
Where the running-cost claims fall apart
Published comparisons disagree flatly on which head uses less water, and you will find respectable sources arguing both directions. That disagreement is a signal that the question is being asked wrong.
Solution use is set by flow rate, not by deck shape. Most machines let the operator pick the rate, and the better ones meter it against ground speed, which takes the deck out of the question. If water cost is what you are chasing, look at the flow control on the machine in front of you rather than at the shape of its brushes.
Consumables are where the decks genuinely differ, and it is the quieter reason disk keeps the polishing and stripping work. There are no floor pads for cylindrical heads. You adjust a cylindrical deck by changing brush filament grade, while a disk deck takes the whole pad range, from white polish to black strip, at a few dollars a pad. Which of the two your floor actually needs is covered in floor scrubber brush vs pad.
Brush wear is easy to miss until the machine starts leaving streaks. On cylindrical rollers the change point is roughly half an inch of bristle left. If your crew is taking longer to cover the same floor, that is the sign that reaches you first.
What none of the three heads will do
No scrub deck finishes the job on its own. Operators are blunt about this: the machines cannot reach into corners or under toe kicks, so a mop never fully leaves your closet. Even square orbital pads only narrow that gap rather than closing it.
Down pressure is the other thing spec sheets undersell. One custodian with two decades on these machines argues that anything under about 100 pounds of down pressure is not worth owning, on the grounds that the point is to scrub the floor rather than tickle it.
We would put that differently, because as stated it writes off buyers it should not. Down pressure does matter more than most spec sheets admit, and it is worth asking for the figure before you commit. But a small machine your crew actually uses beats a big one that sits in the closet because it will not fit through your door. A site under 5,000 square feet is usually better served by a compact scrubber sized to its aisles than by a heavier machine bought to hit a pressure number.
Choosing a head for your facility
Start with the floor, not the machine. If the surface is smooth and you care about appearance, specify disk. If it has grout lines, texture or loose debris, specify cylindrical, and if the grout needs restoring rather than routine scrubbing, pair it with a spinner tool, as our guide to professional tile and grout cleaning machines explains. If you strip finish regularly or you are fighting corners, look at orbital.
Then check that the deck you want comes in the machine size your space needs, because the two choices limit each other more than most buyers expect. Compact machines carry fewer deck options than mid-size walk-behinds do, so your floor plan can rule out a deck type before you have finished picking one.
If you want a second opinion before you commit, send your square footage, floor type and cleaning frequency through the contact page or call (855) 601-5678, and you will get a machine suggestion matched to your floor. Everything in our store ships with the manufacturer's warranty in your name, and unused machines in their original packaging can go back within 30 days under our return policy.
Browse by deck type: disk floor scrubbers, cylindrical floor scrubbers, orbital floor scrubbers.
Related reading
- What are the different types of floor scrubbers?
- Walk-behind vs ride-on floor scrubber
- Key features of a walk-behind floor scrubber
- How long do floor scrubbers last?
- Floor scrubber troubleshooting
- How to clean commercial tile floors
- All floor scrubbers
Written by Rod Michelini, founder of OneUp Cleaning. We sell disk, cylindrical and orbital machines from Tornado, Powr-Flite, Nilfisk, Clarke, ICE and NaceCare, so this guide says where each deck falls short as well as where it wins.
Leave a comment