Mercury TS-21 Cleanmaster Dual-Speed Floor Machine – 21", 175/300 RPM

Mercury TS-21 Cleanmaster – 21" Dual-Speed Floor Machine for Scrubbing and Polishing

The TS-21 is the largest machine in Mercury's Cleanmaster series, sharing the same 1.5 HP 66-frame D/C rectified motor and triple-planetary transmission as the 17" and 19" models but covering more floor per pass with its 21" apron. It switches between 175 RPM for scrubbing and stripping, and 300 RPM for spray buffing and polishing. The Tri-Lock pad driver secures pads without the wobble common in spring-loaded drivers, and the 6" non-marking retractable wheels make repositioning between tasks easier than on fixed-wheel designs.

TS-21 Motor, Transmission, and Speed Configuration

• Motor: 1.5 HP, 66-frame D/C rectified, 13–15 Amp — eliminates burnouts and handles voltage fluctuations in large buildings
• Transmission: triple-planetary high-torque — no startup torque spike, smooth across both speed settings
• Dual speeds: 175 RPM (scrubbing, stripping) / 300 RPM (spray buffing, light polishing)
• Apron size: 21" — rotary brush 19", rotary pad driver with riser 20"
• Brush drive: B/92 style drive plug with universal clutch
• Retractable wheels: 6" non-marking — retract for operation, extend for transport
• Power cord: 50-ft. 14/3-gauge safety cord
• Warranty: 5 years on motor, transmission, and chassis

Where the TS-21 Gets Used

The 21" apron covers roughly 3,500–4,500 sq. ft. per hour at a walking pace, making it the right choice for large open spaces: airport terminals, grocery store main aisles, gymnasium floors, and warehouse break areas. The dual-speed capability means one machine handles the full maintenance cycle — scrub with a blue or green pad at 175 RPM, then spray-buff with a red pad at 300 RPM — without bringing a second machine to the job. VCT, sealed concrete, terrazzo, and sealed hardwood are all within its range.

Pro Application Details for the TS-21

At 175 RPM: black stripping pads remove floor finish; green pads scrub without stripping; blue pads do light scrubbing on sensitive finishes. At 300 RPM: red spray-buff pads restore gloss between burnishing cycles; white pads polish. The Tri-Lock pad driver is a meaningful upgrade over a standard center-bolt driver — it captures the pad from three points, preventing pad spin-out at 300 RPM on smooth floors. The triple-planetary transmission maintains torque at low RPM, which is important for stripping operations where high-solids finish creates drag resistance. The 5-year warranty on the motor, transmission, and chassis is Mercury's full coverage term and applies to both residential and commercial use.

Documents

Mercury TS-21 Owners Manual

Mercury TS-21 Wiring Diagram

Mercury TS-21 Part List

Mercury TS-21 Sell Sheet

Video