The Tornado OB 20 (97600) is a 20″ orbital floor machine built around a square pad design at 3,530 RPM with 180 lbs of down pressure — delivering chemical-free finish removal, scrubbing, sanding, screening, and polishing across all hard floor types from a single machine. Features a ¾″ thick epoxy-coated steel frame, 1.5 HP 182TCZ continuous-duty TENV motor, welded handle with safety interlock triggers, 50-ft UL-listed cord, and <64 dB(A) whisper-quiet operation. Dust control kit, weight kit, solution tank, and pad options available separately. 2-year parts / 10-year roto / 2-year labor warranty. UL and CSA approved. Authorized Tornado dealer. Free shipping on orders over $30.
The Tornado OB 20 (Catalog #97600) is Tornado’s orbital floor machine — a machine that replaces the traditional round disc pad with a 20″ × 14″ square pad running at 3,530 RPM with 180 lbs of down pressure. The orbital motion and square pad geometry give the OB 20 access to floor area that round disc machines miss: the pad reaches into corners and along baseboards without the operator stopping to hand-scrub edges. At 3,530 RPM — nearly 17× faster than a 175-RPM rotary floor machine — the OB 20 performs chemical-free finish removal, scrubbing, sanding, screening, and polishing in applications where a conventional floor machine requires chemicals and multiple passes. Priced at $4,299.00 (was $4,743.00). <64 dB(A) whisper-quiet operation.2-year parts / 10-year roto / 2-year labor warranty. UL and CSA approved.
Twin City Vacuum in Crystal, Minneapolis, MN is an authorized Tornado dealer. We carry the complete Tornado commercial equipment lineup. Questions? Call us at 763-535-0770. Free shipping on orders over $30 to all 50 states.
Key Features of the Tornado OB 20
Orbital Square Pad — 3,530 RPM / 180 lbs Down Pressure
The defining engineering choice in the OB 20 is the orbital square pad. Traditional floor machines use a round disc spinning in one direction — the pad contacts the floor in a circular motion, misses corners by geometry, and produces torque reaction that pushes the machine laterally if the operator releases pressure. The OB 20’s orbital motion moves the pad in an elliptical pattern rather than rotating it in one direction — no net lateral torque, no machine walk, and a square pad that covers floor area flush against walls and into corners without a gap. At 180 lbs of down pressure and 3,530 RPM, the pad agitation intensity far exceeds what a 175-RPM rotary machine delivers — making applications like finish removal and sanding practical at machine speed rather than manual labor speed.
Chemical-Free Finish Removal — Saving Chemistry Costs and IAQ
The OB 20’s primary differentiation from conventional floor machines is chemical-free finish removal — stripping old floor finish from VCT, tile, and hardwood without chemical stripper. On a conventional 175-RPM rotary machine, finish removal requires heavy chemical stripper application, dwell time, scrubbing, double rinsing, and neutralizing — a multi-step process that uses significant chemical volume and creates indoor air quality concerns from stripper fumes in occupied buildings. The OB 20 mechanically abrades the finish off the floor surface using the combination of 3,530 RPM, 180 lbs of pressure, and the appropriate stripping pad. The finish removal kit (model 97602, sold separately) adds a handle-mounted HEPA-filtered vacuum for dust control during dry stripping operations. Chemical-free finish removal reduces chemical costs, eliminates rinse cycles, reduces drying time, and improves IAQ for building occupants and operators.
¾″ Thick Epoxy-Coated Steel Frame — Industrial-Grade Construction
The OB 20 frame is ¾-inch thick epoxy-coated steel — the same construction standard as heavy industrial floor equipment. This frame thickness handles the structural loads from 180 lbs of down pressure and 3,530 RPM motor torque without flex or fatigue. Epoxy coating protects against corrosion from cleaning chemistry, wet floor contact, and the daily handling of commercial operations. This is not a polymer frame machine pressed into heavy applications — the OB 20 is designed from the base plate up for industrial use.
1.5 HP 182TCZ Continuous-Duty TENV Motor
The 182TCZ continuous-duty Totally Enclosed Non-Ventilated (TENV) motor at 1.5 HP / 1,118W is the industrial motor specification that sets the OB 20 apart from light-commercial floor machines using open-frame motors. TENV motor construction encloses the windings completely — no external ventilation openings means no dust, debris, or cleaning chemistry can enter the motor housing. In floor stripping and sanding applications where significant dust and abrasive particles are generated, a TENV motor is the correct specification: open-frame motors in the same environment develop internal contamination that causes premature failure. The 182TCZ frame designation is an NEMA standard motor frame — a commercial/industrial rating. Continuous-duty rated for sustained operation without thermal shutdown under load.
Safety Interlock Triggers — Machine Only Runs When Operator Is Ready
The welded handle with safety interlock triggers requires both triggers to be depressed simultaneously for the machine to operate — the machine stops the moment either hand releases. This is the operational safety standard for high-speed floor machines: at 3,530 RPM and 180 lbs of pressure, an uncontrolled machine presents significant hazard. The interlock design means the machine cannot be accidentally activated and cannot run unattended if the operator steps away or loses their grip.
<64 dB(A) — Whisper-Quiet for Occupied Facilities
At under 64 dB(A), the OB 20 is quieter than most 175-RPM rotary floor machines despite running at 3,530 RPM. The orbital motion produces less vibration and audible noise than rotary disc motion at the same motor speed. Facilities can run finish removal and deep scrubbing operations in partially or fully occupied buildings without the noise disruption that conventional stripping operations produce. This is particularly valuable for schools, healthcare facilities, and retail environments where operational hours overlap with occupied periods.
Operator-Level Handle Adjustment
The easy-to-use handle adjustment at the operator level allows height and angle configuration without bending to the machine — the operator adjusts the handle angle while standing in their normal operating position. Proper handle angle reduces wrist and shoulder fatigue during extended operation and gives the operator correct leverage for controlled forward movement across large floor areas.
Full Floor Care Program — One Machine
With the correct pad, the OB 20 handles the complete hard floor care cycle:
Finish removal / stripping — Black Stripping Pad (97698) for chemical-free dry stripping with optional Dust Control Kit (90054)
Surface preparation — Maroon Surface Prep Pad (97699) for intermediate surface prep between coats
Scrubbing — Red Buffing and Cleaning Pad (97697) for maintenance scrubbing with the optional Solution Tank Kit (90051)
Polishing — White Polishing Pad (97696) for final gloss finish on waxed floors
Sanding and screening — for concrete, hardwood, and gym floor applications
Optional Accessories — Extending Capability
The OB 20 is available with several optional accessories that extend its capability:
Finish Removal Kit (97602): Includes a handle-mounted vacuum with HEPA filtration for dust control during dry chemical-free stripping — the complete dust-capture setup for occupied buildings
40 lb Weight Kit (90048): Adds ballast for more aggressive stripping and surface preparation applications
Solution Tank Kit (90051): Enables solution dispensing for wet scrubbing applications
Dust Control Kit (90054): 1.5-gallon HEPA-filtered vacuum for dust capture
Call us at 763-535-0770 to add any accessories to your order.
OB 20 Orbital vs Rotary 175 RPM Floor Machine — Key Differences
Healthcare — chemical-free VCT stripping eliminates stripper fume IAQ concerns in patient areas; HEPA dust control during sanding in sensitive environments
Education — gymnasium wood floor sanding and screening; VCT corridor stripping and recoating; chemical-free finish removal during occupied or semi-occupied periods
Retail — large-format store VCT and polished concrete finish removal and recoating; quiet enough for partially occupied hours
Hospitality — hotel lobby and convention center hard floor restoration; chemical-free operation reduces HSK chemical inventory and cross-contamination risk
Office buildings — VCT and LVT lobby and corridor stripping; occupied-hours maintenance scrubbing at <64 dB
Industrial — concrete and epoxy floor surface preparation before recoating; TENV motor handles abrasive environments
Building service contractors — single machine handles strip, prep, scrub, sand, screen, and polish across all floor types in the BSC cleaning program
Operation Video — Tornado OB 20/14 Orbital Scrubber
Official Tornado OB 20 orbital scrubber operation video — machine setup, pad attachment, handle adjustment, safety interlock triggers, and cleaning technique.
What is an orbital floor machine and how is it different from a rotary floor machine?
An orbital floor machine moves the pad in an elliptical (orbital) pattern rather than spinning it in one direction. This means no net torque reaction — the machine doesn’t try to walk sideways the way a rotary machine does. It also allows a square pad that reaches into corners and along baseboards. At 3,530 RPM with 180 lbs of pressure, the orbital motion delivers significantly more agitation force than a 175-RPM rotary machine.
Can the OB 20 really strip floor finish without chemicals?
Yes — the combination of 3,530 RPM, 180 lbs of down pressure, and the black stripping pad (97698) mechanically abrades finish from VCT, tile, and hard floor surfaces without chemical stripper. Add the Dust Control Kit (90054) or the complete Finish Removal Kit (97602) for HEPA-filtered dust capture during dry stripping operations. Chemical-free stripping eliminates stripper chemical costs, neutralizing rinse cycles, and fume-related IAQ concerns.
What is the Finish Removal Kit (97602)?
Model 97602 is the complete OB 20 machine with a handle-mounted vacuum and HEPA filtration system pre-installed for dust control during dry chemical-free finish removal. It can also be ordered as the optional Dust Control Kit (Part #90054) separately and added to a standard OB 20 (97600).
What floors can the OB 20 work on?
All standard commercial hard floor types — VCT, ceramic tile, quarry tile, sealed concrete, polished concrete, LVT, terrazzo, and hardwood (with appropriate sanding/screening pads). The orbital motion is safe on surfaces where rotary machines create swirl marks, and the square pad geometry works on any floor plan including tight corridors and rooms with square corners.
Is Twin City Vacuum an authorized Tornado dealer?
Yes. Twin City Vacuum in Crystal, Minneapolis, MN is an authorized Tornado dealer. All units are genuine Tornado equipment backed by the full manufacturer warranty. Our in-house technicians service Tornado commercial equipment at our Crystal, MN location. Call us at 763-535-0770.
Buy the Tornado OB 20 from Twin City Vacuum — Authorized Tornado Dealer
Twin City Vacuum ships the Tornado OB 20 (97600) to all 50 states. Every unit is genuine Tornado equipment backed by the full manufacturer warranty.
✔ Authorized Tornado dealer — genuine equipment, full manufacturer warranty
✔ Square orbital pad — 3,530 RPM, 180 lbs down pressure
