DEWALT DCD798B: problems, parts and running costs

Checked: 2026-10-17

Summary

The DCD798B is the bare-tool version of DEWALT’s compact 20V MAX brushless hammer drill, and the recurring owner issues are not mechanical failures but buyer confusion: listings show a battery the tool does not include, and the near-identical Atomic DCD799 sold at other stores muddies the comparison. Keeping it running costs whatever 20V MAX battery, charger and carbide masonry bits you must buy if you do not already own them. Near $169 bare it is a reasonable occasional-masonry drill for existing 20V MAX owners; at $199 list it is a weak buy because discounted kits have sold for less.

Common problems and fixes

Bare tool mistaken for a kit — the box holds only the drill and a belt hook, yet listing photos show a battery and one Reddit deal post titled “DCD798B” actually covered a kit bundle with battery, charger and bag; check the exact SKU before paying. [1][13]
Clutch does not slip in drill or hammer-drill mode — the manual warns the clutch does not disengage in those positions, so on bind-up the tool stalls and can twist in your hand; the fix is to back off before it jams and to read the stall guidance in the manual. [3]
Cross-channel model confusion — the DCD798 is the Lowe’s-channel drill while the near-identical Atomic DCD799 (shorter 6.49-in. head, 552 UWO) is sold at Home Depot and independent dealers, and DEWALT support has called the DCD799 the upgrade of the DCD798; owners buying the DCD798 first have needed support clarification afterwards. [2][5][6]
Hammer mode used with the wrong bit or technique — the manual restricts hammer mode to carbide-tipped, percussion-rated masonry bits, warns against side pressure on the bit, and says to back the bit out to clear debris; using standard bits or levering sideways is misuse, not a defect. [3]

Parts and consumables

Belt hook — included with the bare tool. [1]
Chuck and gearbox parts — DEWALT publishes an exploded diagram and parts availability for the DCD798 line, but no owner-reported repair or parts-pricing evidence was found; treat parts cost as unverified. [16][17]

Yearly running cost

No subscription or scheduled consumable exists. [1][3][6]

When it is a good buy

Near $169 bare — the street price at Acme Tools and Burns Tools in October 2026; reasonable for existing 20V MAX owners who want a compact occasional-masonry hammer drill backed by the 3-year limited warranty. [10][11]
$199 list for the bare tool — weak: discounted kits have retailed below that and the tool has no independent performance validation. [6][10][12]
Discounted kits at $120-179 — the strongest value position; the DCD798D1 was $179 at Lowe’s per September 2025 deal coverage and The Drive recorded $120 in December 2023, while a Reddit deal post flagged a $99.99 Lowe’s listing that a commenter said included a battery, charger and bag. [4][6][13]

Named alternatives:

Atomic DCD799 — sold at Home Depot and independents, 552 UWO, 6.49-in. head, 3.0 Ah kit battery; DEWALT support calls it the upgrade of the DCD798; the better choice if you want more power or a shorter head and do not shop at Lowe’s. [2][5][6]
XR DCD805 / DCD1007 — the larger XR hammer drills; the better choice if you need heavy, validated concrete performance rather than compactness. [2][15]