Mercury Floor Machines Ultra DC Burnisher DC-20-1500 – 20", 1500 RPM, 1.5 HP

DC-20-1500 High-Speed Floor Burnisher — 1500 RPM D/C Motor for Large Commercial Floors

The Mercury Ultra DC Burnisher DC-20-1500 runs a D/C rectified motor rather than the standard A/C motor found in most burnishers at this price point — eliminating low-voltage startup torque issues that cause belt-driven and A/C units to bog down mid-pass. At 1500 RPM with a 20" pad and 85 lbs of machine weight pressing the pad, it produces a wet-look finish on VCT and vinyl composite tile that spray buffing alone cannot match. Designed for large-format commercial floors where finish quality and shift efficiency both matter.

DC-20-1500 RPM, Pad Pressure, and Compatible Pads

The D/C rectified motor delivers consistent torque across its operating range — it does not lose RPM or produce uneven gloss when voltage dips on long extension runs or shared circuits.

• 1500 RPM at 1.5 HP D/C rectified motor — consistent pad speed regardless of voltage fluctuations; no startup torque surge that trips breakers in older facilities
• 20" pad coverage at 85 lbs machine weight — 85 lbs of pad pressure produces a deeper gloss per pass than lighter 20" machines; fewer passes needed to reach target shine level
• Flexible pad holder with threaded centering device — self-levels on uneven or warped floor sections, preventing edge skip marks and uneven finish lines
• Non-marking full-wrap bumpers — protects baseboards and wall surfaces during passes; eliminates scuff marks that require touch-up after burnishing crews finish
• 6" operating wheels, 4" transport wheels — separate wheel sets for working and moving; operating wheels keep machine stable at speed, transport wheels allow tight maneuvering in corridors
• 50 ft 14/3-gauge power cord — reaches across standard commercial floor bays without extension cord chaining; 14/3 gauge handles the 15-amp draw without heat buildup
• Interlock switch with non-conductive dual triggers — machine stops the moment either trigger is released; required by OSHA for operator safety on powered floor equipment

DC-20-1500 Applications and Environments

Grocery stores and supermarkets with high-gloss VCT programs are the primary use case — 1500 RPM is the standard burnishing speed for restoring finish between stripping cycles, and the 20" pad width covers standard 12-foot aisle widths in four overlapping passes. Hospital corridor burnishing programs use the D/C motor specifically for its consistent speed on circuits shared with medical equipment, where voltage variation from other loads is common. School districts and municipal facilities running in-house custodial programs use the DC-20-1500 for gym floors and main corridor VCT maintenance. Building service contractors cleaning office parks, convention centers, and retail spaces after hours find the 50 ft cord reduces outlet-to-outlet repositioning compared to shorter-cord burnishers.

DC-20-1500 Pad Compatibility and What Ships in the Box

Compatible with standard 20" round floor pads: use a tan or white pad for high-speed burnishing to final gloss on VCT; use a red pad for spray buffing between burnish cycles. Pad not included — order separately. Ships with the machine, 50 ft power cord, and transport/operating wheel sets pre-installed. For high-gloss concrete or terrazzo applications, 1500 RPM is appropriate; for stripping, step down to a low-speed (175–350 RPM) floor machine with a black pad.

Specifications

Documents

DC-20-1500 Owner's Manual  

DC-20-1500 Parts List  

DC-20-1500 Wiring Diagram  

DC-20-1500 Sell Sheet

Video Overview