DEWALT DWE402: problems, parts and running costs

Checked: 2026-10-16

Summary

The DWE402 is a corded 4-1/2 inch, 11 amp grinder, and the main caution is that it has no wheel brake and no kickback clutch, which DEWALT’s own Canadian spec table confirms. Other recurring owner complaints are a paddle lock that can stick when dirty, a guard that interferes with some discs, and weight. It is strong value at $89-120 at US retailers and weak above $135.

Common problems and fixes

Paddle lock can stick when dirty — the lock-off lever can bind when grit builds up; keep the switch area clean and blow it out with dry air. [7]
Guard too big for some discs — the One-Touch guard can interfere with certain discs and tight-area work; swap to a slimmer guard if one fits. [7]
Corded mobility — the 6 ft cord limits reach versus cordless; plan around a power source. [24]
Lock-on restarts after a power cut — the manual warns that a locked-on switch can restart the tool after a power interruption; the manual also warns never to disable the lock-off. [2]

Parts and consumables

K kit extras — the DWE402K kit adds a depressed center wheel and kit box for roughly $25-45 over the bare tool. [3][20]

Yearly running cost

No owner-reported yearly total is available. The recurring costs are consumable grinding and cutting wheels and flap discs, occasional brush replacement, and electricity; there is no battery platform lock-in because it is corded. [8][9][17]

When it is a good buy

At $89.00 (Home Depot, 2026-10) or $99.99 (Farm & Home Supply, 2026-10) it is strong value, with the missing brake as the main tradeoff. [8][12]
From $101 to $120 it stays good value; observed prices include Acme Tools $110.99, Stone Tooling $115.00, Kaufman Company $116.70 and Ohio Power Tool $117.19 (2026-10). [9][10][13][14]
From $121 to $135 it is fair and worth comparing against brake-equipped brushless corded options. [6][19]
Above $135 it is weak; observed prices include Northern Tool $129.99, MSC Direct $140.70 and ToolSource $144.81 (2026-10), and the DWE402K kit is $136.11 at Toolup (2026-10). [11][15][16][20]
Metabo HPT G13VE2 — the better choice when you need kickback control, an electric brake and restart protection, though it costs $209. [6]
Ridgid R1006 — the better choice for the lowest corded price, at $60. [6]
DEWALT DWE402N — the better choice when you want a dead-man’s paddle with no lock-on. [19][27]
DEWALT DWE402W — the better choice when you want a grinding wheel included. [3]