Skip to content
Mercury DC-21-1170 Ultra D.C. High-Speed Burnisher – 21

Mercury DC-21-1170 Ultra D.C. High-Speed Burnisher – 21", 1170 RPM

Brand: Mercury Floor MachinesSKU: DC-21-1170In Stock – Ready to Ship
$1,969.00$2,298.00Save $329.00

Ships from US manufacturer with factory warranty

Ach Direct DebitAmazon American Express Apple Pay Diners ClubDiscoverGoogle Pay Mastercard PayPalShop Pay USDC Visa
Authorized RetailerFactory-authorized dealer with genuine products
Manufacturer's WarrantyFull manufacturer warranty included
30-Day ReturnsHassle-free returns within 30 days
Lowest Price GuaranteedWe match any competitor's price
Ordering 3+ units? Call for volume pricing – +1 (978) 295-7538
Order before 5:00 PM EST for same-day dispatch. Estimated delivery:

Need help choosing? Talk to an expert

+1 (978) 295-7538

Mercury DC-21-1170 Ultra D.C. Burnisher – 21" Floor Polisher at 1170 RPM

The DC-21-1170 pairs Mercury's largest 21" apron with a 1170 RPM burnishing speed — lower than the DC-21-2000, which makes it the better choice for facilities that burnish daily or multiple times per week. At 1170 RPM, the machine generates less friction heat per pass, which means less thermal stress on the floor finish coat over time. The same 1.5 HP D/C rectified motor and front caster pad-pressure system used in the 2000 RPM model carry over here, so the build quality and chassis weight (86 lbs.) are consistent across the DC-21 line.

DC-21-1170 Motor, Speed, and Chassis

  • Motor: 1.5 HP D/C rectified, 15 Amp — eliminates burnouts and handles voltage variation in large facilities
  • Speed: 1170 RPM — lower heat burnishing; gentler on finish coats, suited for frequent burnishing programs
  • Apron size: 21" polished aluminum with full-wrap non-marking bumpers
  • Pad pressure: front caster assembly with flexible pad holder and threaded centering device
  • Chassis: polished aluminum, 86 lbs. machine weight
  • Operating wheels: 6" non-marking; transport wheels: 4" non-marking
  • Handle: adjustable 48" — interlock switch, non-conductive dual triggers
  • Power cord: 50-ft. 14/3-gauge safety cord

Where the DC-21-1170 Gets Used

The DC-21-1170 suits large-area floors where burnishing is part of a daily maintenance program rather than a periodic restoration event. Hotel lobbies, convention center floors, grocery store main aisles, and healthcare facility corridors that require daily shine maintenance are the typical applications. At 1170 RPM, the machine is quiet enough to use during light occupancy without significant noise complaints, and the reduced heat cycle means the finish coat can sustain daily burnishing without premature deterioration.

Pro Application Details for the DC-21-1170

The choice between 1170 RPM and 2000 RPM in the DC-21 line comes down to burnishing frequency and finish coat durability goals. Daily burnishing at 2000 RPM generates enough heat to gradually break down the finish polymer structure, requiring re-coating more often. At 1170 RPM, the gloss result is slightly less intense — a satin rather than wet-look — but the finish coat lasts longer before needing stripping and re-coating. Use white or tan pads at 1170 RPM; natural fiber pads also work well. The 21" apron and 86-lb. machine weight give the DC-21-1170 a slight weight advantage over the 84-lb. DC-19-1170 for pad seating on smooth VCT.

Attribute Details
Model DC-21-1170
Motor 1.5 HP D/C Rectified, 15 Amps
Speed 1170 RPM
Apron Size 21"
Chassis Polished Aluminum
Operating Wheels 6" Non-Marking
Transport Wheels 4" Non-Marking
Power Cord 50-ft. 14/3-gauge safety cord
Machine Weight 86 lbs.

Documents

Mercury DC-21-1170 Owners Manual

Mercury DC-21-1170 Wiring Diagram

Mercury DC-21-1170 Part List

Mercury DC-21-1170 Sell Sheet

Video

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:

  1. 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).
  2. We verify your certificate and mark your account tax-exempt — usually within one business day.
  3. 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.

Product Image
Added to cart
Mercury DC-21-1170 Ultra D.C. High-Speed Burnisher – 21Mercury DC-21-1170 Ultra D.C. High-Speed Burnisher – 21",...
View Cart
$1,969.00

Frequently Asked Questions

What is the difference between the DC-21-1170 and DC-21-2000?
Both use the same 21" apron and 1.5 HP DC rectified motor. The DC-21-1170 runs at 1170 RPM, generating less friction heat — better for daily burnishing programs where finish longevity matters. The DC-21-2000 runs at 2000 RPM, producing a brighter wet-look gloss but generating more heat per pass, which can accelerate finish degradation with frequent use.
What pads should I use with the DC-21-1170 at 1170 RPM?
Use white or tan burnishing pads, or natural fiber pads, at 1170 RPM. Do not use black, green, or blue scrubbing pads — those are designed for low-speed operations (175–300 RPM) and will damage the finish at any high-speed burnishing RPM.
How heavy is the Mercury DC-21-1170?
The DC-21-1170 weighs 86 lbs. — 2 lbs. heavier than the DC-19-1170 (84 lbs.) due to the larger aluminum chassis. The additional weight improves pad seating on smooth VCT and similar hard surfaces.
Is 1170 RPM fast enough to produce a high-gloss finish?
Yes. At 1170 RPM, the DC-21-1170 produces a satin-to-semi-gloss finish rather than a wet-look gloss. For facilities that prioritize finish coat longevity and burnish daily, 1170 RPM is the appropriate speed range. For a wet-look gloss, choose the DC-21-2000 at 2000 RPM.
What safety features does the DC-21-1170 include?
The DC-21-1170 includes a safety interlock switch that stops the machine when the handle is released, non-conductive dual triggers to reduce electric shock risk, and full-wrap non-marking bumpers that protect walls and baseboards.
Why is the DC-21-1170 better suited for daily burnishing than the DC-21-2000?
1170 RPM generates less friction heat than 2000 RPM. Daily burnishing at 2000 RPM accumulates enough heat stress on the floor finish over time to cause premature polymer breakdown, requiring more frequent strip-and-recoat cycles. At 1170 RPM, the same daily burnishing program extends the finish coat's useful life.

Frequently Asked Questions

1. What payment methods can I use?

We accept Visa, MasterCard, American Express, Diners Club, Discover, major debit cards, and digital wallets like PayPal, Google Pay, Meta Pay, and Apple Pay.

2. When will my payment be processed?

Your credit/debit card or PayPal account will be charged when you place your order. Secure payment processing protects your information.

3. Will I receive an order confirmation?

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.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare