DEWALT DCD805: problems, parts and running costs

Checked: 2026-10-27

Summary

DCD805B is a 20V MAX XR brushless 1/2-in hammer drill/driver sold as a bare tool; owners report chuck loosening or wobble under heavy hole-saw loads, cutouts on large bits, and kickback risk because it lacks anti-rotation protection. Keeping it running costs little in electricity (about $0.48 a year on the illustrative calculation below) but batteries, bits and occasional parts dominate. It is a strong buy at $70-100 from a trusted authorized seller if you already own DEWALT 20V batteries, reasonable at $100-140, and a poor buy near $199 against the DCD806B.

Common problems and fixes

Chuck unscrews or loosens during heavy hole-saw work — one 2023 owner reported the chuck fully unscrewing on a 6-in hole-saw job and loosening repeatedly; the US manual’s recommended wood hole-saw capacity is 3 in, so that load was well beyond the listed size. Stop using a tool with a loose chuck and get authorized inspection; do not improvise permanent adhesives. Whether warranty covers it was not established. [18][3][8]
Perceived chuck or bit wobble — a May 2024 owner reported visible wobble after about six months and roughly two uses; commenters disagreed whether the bit holder or the chuck wobbled, with no dial-indicator measurement. Test with a short straight twist bit, clean the jaws, and seek authorized assessment for measured runout rather than treating long extension wobble as a defective spindle. [19]
Cutouts on large hole saws and augers — a 2023 owner reported shutdowns on 2-1/8-in hole saws and 1-in auger bits; replies favored low gear and sharp bits, and one unverified commenter claimed to work in a DEWALT service center. The US manual says to release the trigger immediately on stall and not to repeatedly pulse an obstructed drill. Confirm speed, application and feed pressure; seek service if shutdowns recur under ordinary supported loads. [20][4]
Kickback and no practical side-handle mount — one owner reported near wrist injuries and could not find a practical side-handle mount; DEWALT’s manual warns a stalled drill can twist suddenly. DCD805’s feature sheet does not list anti-rotation protection, while DCD806 does. Use controlled grip, supported workpieces and low gear for large holes; consider DCD806 or a dedicated high-torque drill with a side handle for demanding work. [21][4][7]
Unverified ratcheting-chuck tightening tip — some owners advise hand-tightening then backing off one click, but this is a community tip, not a manufacturer instruction. Follow DEWALT instructions instead. [22][3]
No reports found for controller, gearbox, trigger, chuck-jaw or LED failure timing — parts listings prove replaceability, not failure frequency, and the brushless motor needs no carbon-brush service. [1][11]

Parts and consumables

Metal keyless chuck (OEM N928691) — $35.42, PartSelect, in stock; replace for verified damaged jaws or chuck, not for an unmeasured bit-holder wiggle. No replacement interval reported. [11]
Speed selector (N393603) — $6.40, PartSelect, in stock; replace if mechanically broken. [11]
Forward/reverse button (N399342) — $6.40, PartSelect, in stock; replace if damaged. [11]
Pivoting LED assembly (N883994) — $18.65, PartSelect, special order; replace after diagnosed breakage. [11]
Housing assembly (NA065950) — $13.47, PartSelect, special order. [11]
Small hardware (Torx screw 682211-00, detent spring N014681, roll pin N071836) — about $6.40 each, PartSelect; confirm exact drawing position. [11]
2Ah battery DCB203 — $84.86 to $98.98, Home Depot page snapshots; compatible with 20V MAX and used in the DCD805D2 kit. No DCD805-specific battery lifespan established. [16][2]
5Ah battery DCB205 — $119 promotional versus $169 standard, Home Depot; DEWALT references it in the drill’s comparative power claim. Replace when capacity degrades or the pack fails, not on a fixed annual schedule. [17][1]
DCE042 TOOL CONNECT chip, bits, hole saws, screws — optional or job-specific consumables; no established annual cost or replacement count. [1]

Yearly running cost

Electricity is minor: an illustrative calculation only, 50 full charges of a nominal 18V x 2Ah (36 Wh) DCB203 is 1.8 kWh of battery energy; at an assumed 75% wall-to-battery efficiency that is 2.4 kWh a year, or about $0.48 a year at an assumed $0.20/kWh. Brushless motors need no carbon brushes, and no manufacturer-specified annual service interval was found. Battery or accessory spending can far exceed charging cost: a DCB203 lists around $85-99 when replaced, and bits, hole saws and screws are job-specific. Real typical yearly running cost: no reports found. [16][1][9]

When it is a good buy

Home Depot listed DCD805B at $69.65 in October 2026, marked down from a displayed $199, with a 90-day return policy shown; verify final cart, store and stock. Ace Hardware listed the same bare tool at $199. A ShopSavvy snapshot dated September 10, 2026 showed Walmart at $117.55, Sears at $135.75 and Ace, Lowe’s and Home Depot at $179; those are older snapshot offers, not guaranteed stock. [12][13][14]

On those figures: $70-100 from a trusted authorized seller is excellent value if you already own batteries; $100-140 is reasonable; above $150, compare the DCD800B (DEWALT listed it at $151.74) if you do not need hammer mode; near $199, the DCD806B (Home Depot listed it at $199) buys anti-rotation protection for about the same money. The DCD805D2 kit bundles the drill with 2 x 2Ah batteries, a charger and a bag, but no reliable October 2026 kit checkout price was established. [12][6][7][15][2]

Alternatives: DEWALT DCD800B is the non-hammer XR drill/driver with a 6.37-in body and no hammer mode; better for frequent screw, wood and metal work if the DCD805 discount is unavailable. [6] DEWALT DCD806B is the newer 20V XR hammer drill with a verified anti-rotation sensor and shutdown; more attractive than a $199 DCD805B when kickback exposure matters. [7][15] For extensive hard-concrete drilling, a proper SDS-plus rotary hammer is the relevant upgrade; no specific model or offer was established in this research. [4]