DEWALT® DCM849B 20V MAX XR® Cordless 7-Inch Variable-Speed Rotary Polisher – High-Efficiency Brushless Automotive and Marine Detailing Buffing Tool (Tool Only)

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SKU:
DWTDCM849B
UPC:
885911621762
MPN:
DCM849B
Availability:
Ready to ship
Weight:
7.0000 LBS
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  • DEWALT DCM849B 20V MAX XR 7-inch cordless variable-speed rotary polisher with brushless motor for automotive polishing and paint correction.
  • DEWALT DCM849B rotary polisher highlighting brushless motor, variable-speed dial and trigger, lock-on trigger, sideways battery pack, and rubber gear case overmold.
  • Close-up of the variable-speed dial on the DEWALT DCM849B cordless rotary polisher with adjustable speeds from 1,800 to 2,200 RPM.
  • DEWALT DCM849B 20V MAX XR rotary polisher featuring a sideways battery pack design to help prevent surface scratching during polishing.
  • DEWALT DCM849B 20V MAX XR cordless rotary polisher with side handle and 7-inch backing pad for improved control during polishing.
MSRP: $379.00
Now: $308.00
Was: $379.00
— You save $71.00
  • ✔️ Cordless Freedom: Professional-grade polishing performance without the restriction of cords; perfect for automotive, marine, and glass applications. ✔️ Precision Control: Variable-speed trigger and dial ensure optimal finish.
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Description

DeWalt DCM849B 20V MAX XR 7" Cordless Variable-Speed Rotary Polisher (Tool Only)

High-Output XR Brushless Motor Core. dual-Stage Variable Speed Trigger & Dial Control. High-Friction Non-Marring Protective Rubber Overmolds.

The DEWALT DCM849B Rotary Polisher features a high-efficiency brushless motor, a variable speed dial (800-2200 RPM), a sideways battery configuration, and non-marring rubber gear case overmolds to deliver flawless automotive paint and marine gelcoat correction without cord clutter.

The DEWALT DCM849B 20V MAX 7" Cordless Polisher brings scratch-free paint correction, heavy gelcoat oxidation stripping, and untethered cord-free detailing freedom directly to your automotive body shop garage, marine detailing dock, or structural glass-polishing layout. Purpose-built to eliminate the serious hazard of power cords dragging across fresh clear coats, the frustrating bog-down stalls of brushed motors under heavy buffing pressure, and the excessive arm fatigue caused by poorly balanced buffers, this premium XR professional rotary buffer establishes an elite industry standard. It arms professional automotive detailers, boat restoration crews, fiberglass fabricators, and glass restoration mechanics with a high-torque correction asset explicitly optimized to refine micro-scratches, level deep orange peel texture, polish boat hulls, and clarify headlights smoothly.

Exceptional torque retention and an elite, paint-safe handling platform serve as the engineering foundation for this robust DEWALT 20V MAX XR Polisher. Driven by an advanced XR brushless motor that delivers up to 75% more runtime over legacy brushed tools, the tool maintains a crisp, unwavering no-load speed matrix ranging from 800 up to 2,200 RPM. This velocity is managed through an intuitive pairing of a variable-speed dial and a progressive accelerator trigger. The chassis features a unique sideways-oriented battery orientation that prevents the battery case from scraping against horizontal vehicle panels during deep passes. The tool is protected by a high-friction rubber gear case overmold that shields delicate automotive body lines from accidental impact damage while providing multiple secure gripping surfaces.

Why the DEWALT® XR® DCM849B Rotary Polisher Leads the Detailing Bay:

  • Untethered Cordless Mobility: Eliminates the hazard of dragging heavy extensions over fresh, polished paint lines, allowing you to walk freely around vehicles.
  • Up to 75% More Brushless Uptime: High-efficiency motor delivers optimized battery consumption curves and stays cool during long, repeating pad corrections.
  • Dual-Control Precision 2200 RPM: Pairs an electronic variable speed dial with a featherable trigger to smoothly manage speed ranges from 800 to 2,200 RPM.
  • Sideways Paint-Safe Battery Orientation: Keeps the heavy battery block turned horizontally out of the way, preventing panel scratches during vertical buffing passes.
  • Protective Non-Marring Gear Case: Shrouded in premium overmolded rubber to dampen operational vibrations and safeguard vehicle body lines if the tool nose touches the paint.

Specifications

Paint Correction Metric Universal Specification Details
Model SKU Part Number 20V MAX* XR® Brushless 7" Rotary Polisher / DCM849B
Manufacturer Brand Line DEWALT® Power Tools (Premium XR® Brushless Contractor Series)
System Voltage Platform 20V MAX* (Universal Slide Battery Pack Interconnectivity)
Motor System Architecture High-Efficiency Brushless Core (Delivers up to 75% More Runtime)
No-Load Operational Speed Adjustable Range from 800 up to 2,200 RPM Continuous
Speed Interface System Electronic Variable Preset Dial + Progressive Accelerator Trigger
Standard Backing Plate Size 7-Inch (180 mm Standard Large-Area Velcro Buffing Pad Platform)
Spindle Thread Connection Industrial Standard 5/8" - 11 TPI Spindle (Fits Universal Pads)
Battery Housing Layout Sideways Lateral Rotated Orientation (Protects Paneled Surfaces)
Chassis Impact Shielding Non-Marring Shock-Absorbing Rubber Gear Case Overmold
Auxiliary Grip Solutions Includes Standard Straight Side Handle + Traditional Loop Handle
Operational Weight (Bare) Lightweight 4.8 lbs Core Frame (Excludes External Battery Pack)

Frequently Asked Questions

+ Is this DCM849B model a rotary polisher or a dual-action (DA) random orbit polisher?
The DCM849B is a true, heavy-duty rotary polisher. This means the pad rotates on a fixed, direct axis to generate high friction and heat, making it ideal for aggressive paint correction, removing deep scratches, and leveling boat gelcoat oxidation. If you are a beginner or looking for a safer, non-forced dual-action tool for final waxing and swirl prevention, you should purchase the DEWALT DCM848B Random Orbit Polisher instead.
+ Which battery model is recommended to optimize the runtime and balance of this buffer?
Since this is a bare tool configuration (battery and charger sold separately), you can use any 20V MAX* or FLEXVOLT® battery pack. For the optimal blend of weight distribution and continuous runtime, professional detailers recommend running DEWALT 20V MAX* 5.0Ah (DCB205) or XR 6.0Ah batteries. Alternatively, you can buy the pre-configured DCM849P2 Kit, which bundles the bare tool with two 5.0Ah packs and a contractor bag.
+ Why did DEWALT rotate the battery pack orientation sideways on this polisher frame?
Traditional cordless designs align the battery straight down along the tool shaft, meaning the square end of the battery pack hangs down directly over your workspace. When buffing flat panels, that battery corner can easily bump and scratch fresh clear coats. DEWALT engineered a sideways lateral battery dock that keeps the pack rotated 90 degrees flat against the tool profile, providing complete panel safety during wide swooping buffing arcs.
+ Can I use standard aftermarket 7-inch hook-and-loop foam or wool buffing pads with this tool?
Yes, absolutely. The DCM849B features an industry-standard 5/8" - 11 TPI threaded drive spindle paired with a large spindle-lock button for fast, tool-free backing plate changes. The included 7-inch backing plate accepts any standard 7" or 8" hook-and-loop compound pads, letting you use your preferred wool slicing discs, foam cutting layers, or micro-finishing pads seamlessly.
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Product Specifications

category_bullets:
• DeWalt DCM849B Rotary Polisher Core: High-efficiency 7" cordless rotary polisher features a brushless motor for extended runtime, variable speed (800-2200 RPM) control, and a rubber gear case overmold. • 20V Max XR. • Tool Only.
selling_points:
✔️ Cordless Freedom: Professional-grade polishing performance without the restriction of cords; perfect for automotive, marine, and glass applications. ✔️ Precision Control: Variable-speed trigger and dial ensure optimal finish.
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1 Review

  • 5
    Great tool

    Quality tool as expected. Using to sharpen blades. Performs well

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