# DeWalt DWE402 4-1/2 in. Small Angle Grinder vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only): specs and price compared

A sourced, side-by-side comparison of the DeWalt DWE402 4-1/2 in. Small Angle Grinder (DeWalt) and Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) (Ridgid) among angle grinders. Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) is the cheaper of the two at $99.

## Side by side

| Spec | DeWalt DWE402 4-1/2 in. Small Angle Grinder | Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) |
| --- | --- | --- |
| US price | $117 | $99 |
| Brand | DeWalt | Ridgid |
| Disc size (in) | 4.5 in | 4.5 in |
| Power source | corded | cordless |
| Amps or voltage | 11 A | 18 V |
| Max (rpm) | 11000 | 9000 |
| Brushless | No | No |
| Switch type | paddle | slide |
| No volt release | — | — |
| Weight (lb) | 4.6 | 4.5 |

## Key differences

- Power source: DeWalt DWE402 4-1/2 in. Small Angle Grinder corded vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) cordless
- Amps or voltage: DeWalt DWE402 4-1/2 in. Small Angle Grinder 11 A vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) 18 V
- Max (rpm): DeWalt DWE402 4-1/2 in. Small Angle Grinder 11000 vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) 9000
- Switch type: DeWalt DWE402 4-1/2 in. Small Angle Grinder paddle vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) slide
- Weight (lb): DeWalt DWE402 4-1/2 in. Small Angle Grinder 4.6 vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) 4.5

## What reviewers say

**Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only)** — Only one whitelisted tester, Pro Tool Reviews, hands-on tested this exact R86040B. PTR scored it 8.2/10, praising cordless mobility and strong cutting torque, but flagged fast battery drain (6-7 cuts per charge) and a single fixed speed with no variable control. (1 sourced review.)

## Sources

- DeWalt DWE402 4-1/2 in. Small Angle Grinder: https://www.dewalt.com/product/dwe402/4-12-115mm-small-angle-grinder (dewalt.com, verified 2026-06-20)
- Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only): https://www.homedepot.com/p/RIDGID-X4-18-Volt-Lithium-Ion-Cordless-4-1-2-in-Angle-Grinder-R86040B/203930490 (homedepot.com, verified 2026-06-20)

Canonical: https://frontdeskreview.com/gear/angle-grinders/dewalt-dwe402-vs-ridgid-r86040b/
Cite: Per The Front Desk Review, DeWalt DWE402 4-1/2 in. Small Angle Grinder ($117) vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) ($99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/angle-grinders/dewalt-dwe402-vs-ridgid-r86040b/
License: CC BY 4.0.