The Tornado OB 28/20 (models TS550-W28-UC / UG) is the high-output orbital in Tornado's walk-behind line: a 28" rectangular scrub head that reaches corners and baseboards, running at 3,530 RPM for chemical-free finish removal. Up to 132 lbs of adjustable down pressure handles heavy buildup on VCT, terrazzo, and polished concrete, while 20-gallon solution and 22-gallon recovery tanks support 3–4 hours of continuous work. A 300W traction drive climbs ramps to 10% grade with full tanks, making it a fit for universities, convention centers, and large healthcare campuses where a 20" orbital is too slow.
OB 28/20 Orbital Speed, Pressure, and Tank Capacity
What separates the OB 28/20 from the OB 20/14 is orbital speed and tank size: 3,530 RPM versus 2,200 RPM strips finish more aggressively per pass, and the 20/22-gallon tanks run well past the 14/14-gallon set on the smaller machine.
3,530 RPM orbital speed — the highest RPM in Tornado's walk-behind orbital line; removes finish in fewer passes and shorter cycles than the OB 20/14
28" rectangular scrub head — reaches corners and baseboards across a 28" path; one pass covers edge to wall with no secondary hand scrub
132 lbs adjustable down pressure — 20% more than the OB 20/14; clears heavy-buildup stripping on high-traffic VCT, terrazzo, and polished concrete
20-gal solution / 22-gal recovery tanks — the extra 6 gallons over the OB 20/14 adds roughly 45 minutes of runtime before refill
300W traction motor — fully loaded ramp capability to 10% grade without operator push
Lifetime warranty on isolators — vibration isolation that guards against hand-arm vibration syndrome (HAVS) on multi-hour shifts
OB 28/20 Applications and Environments
Universities and large K-12 districts with gym floors, wide hallways, and open commons are the primary fit. A 28" path and large tanks clear a typical 50,000 sq ft building in a single overnight shift. Convention centers and hotel ballrooms with VCT or polished concrete run it for finish-removal cycles that would take several passes with a smaller orbital or standard disc machine. Large healthcare campuses with multi-building terrazzo corridors specify it for both daily maintenance and periodic strip-and-recoat on one platform. Grocery distribution centers and food plants with sealed concrete use it for daily moisture management and periodic deep scrubbing without chemical strippers.
What Ships in the Box
Every OB 28/20 arrives complete with front squeegee, rear squeegee, and on-board 24V charger. Lead Acid (TS550-W28-UC) includes four 99506 6V Lead Acid batteries; AGM (TS550-W28-UG) includes four 99558 AGM batteries. Pad options — black stripping, blue cleaner, red spray buff, and maroon eco — are sold separately.
Specifications
Model
TS550-W28-UC (Lead Acid) / TS550-W28-UG (AGM)
Cleaning Path
28" orbital (rectangular head)
Brush Speed
3,530 RPM orbital
Brush Pressure
Up to 132 lbs (adjustable)
Solution Tank
20 gallons
Recovery Tank
22 gallons
Runtime
3–4 hours per charge
System Voltage
24V
Traction Motor
300W (handles up to 10% grade)
Sound Level
<70 dB(A)
Weight (without batteries)
348 lbs
Dimensions
60" L × 30" W × 41" H
Isolator Warranty
Lifetime
Manufacturer's Warranty
This product comes with a full manufacturer's warranty. All warranty claims are handled directly by the manufacturer.
For specific warranty details, please contact us at +1 (978) 295-7538 or email info@uscleaningtools.com
B2B & Tax-Exempt Purchases
We supply contractors, restoration companies, property managers, schools, government agencies, and other tax-exempt organizations.
How to place a tax-exempt order:
Write to us through our Contact Us page or email info@uscleaningtools.com and attach your valid tax exemption certificate (state resale or exemption certificate).
We verify your certificate and mark your account tax-exempt — usually within one business day.
Place your order and sales tax will not be charged.
For volume pricing or purchase orders, call +1 (978) 295-7538.
Shipping & Returns
Free shipping on most brands for orders over $300, delivered to the lower 48 states. Any brand-specific freight rate is shown at checkout before you pay.
Processing & delivery: in-stock orders are processed within 1–2 business days and typically deliver in 5–7 business days. Tracking is emailed within 24 hours of shipment. Built-to-order and backordered equipment shows its lead time on this page.
Freight deliveries: inspect your equipment on arrival and note any damage on the delivery receipt. Items damaged in transit or defective on arrival are fully covered at no cost to you.
Cancellations: cancel any time before your order ships for a full 100% refund.
30-day returns: return unused equipment in its original packaging within 30 days of delivery. Change-of-mind returns are subject to a restocking fee. To start a return, email info@uscleaningtools.com or call +1 (978) 295-7538.
Added to cart
Tornado OB 28/20 Orbital Floor Scrubber – Walk-Behind, 35...
We accept Visa, MasterCard, American Express, Diners Club, Discover, major debit cards, and digital wallets like PayPal, Google Pay, Meta Pay, and Apple Pay.
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Your credit/debit card or PayPal account will be charged when you place your order. Secure payment processing protects your information.
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Yes, a confirmation email will be sent to the provided email address once the order is placed.
4. How long does it take to process an order?
Orders are processed within 1-2 business days and then prepared for shipment.
5. How long does it take for my order to arrive?
Estimated arrival time (ETA) is 5-7 business days for all orders.
6. Do you offer warranty?
All our products come with a manufacturer warranty of at least 1 year, depending on the brand.
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