# Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded 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 Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder (Metabo HPT) and Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) (Ridgid) among angle grinders. Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder is the cheaper of the two at $74.

## Side by side

| Spec | Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder | Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) |
| --- | --- | --- |
| US price | $74 | $99 |
| Brand | Metabo HPT | Ridgid |
| Disc size (in) | 4.5 in | 4.5 in |
| Power source | corded | cordless |
| Amps or voltage | 6.2 A | 18 V |
| Max (rpm) | 10000 | 9000 |
| Brushless | No | No |
| Switch type | slide | slide |
| No volt release | — | — |
| Weight (lb) | 4 | 4.5 |

## Key differences

- Power source: Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder corded vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) cordless
- Amps or voltage: Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder 6.2 A vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) 18 V
- Max (rpm): Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder 10000 vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) 9000
- Weight (lb): Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder 4 vs Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) 4.5

## What reviewers say

**Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder** — Only one whitelisted tester (Pro Tool Reviews) covers the G12SR4, and it appears in a corded slide-switch lineup overview, not a hands-on lab test (the outlet did not test the tool). PTR frames it as the range's most budget-friendly pick at $39, bundled with five abrasives and a carrying case, and lists the manufacturer specs (980W, 10,000 RPM, 4 lbs). No outlet published tester-measured performance data. (1 sourced review.)

**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

- Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder: https://www.metabo-hpt.com/us/main-navigation/item/g12sr4-6-2-amp-4-1-2-angle-grinder-w-5-abrasive-wheels-Metabo-HPT (metabo-hpt.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/metabo-hpt-g12sr4-vs-ridgid-r86040b/
Cite: Per The Front Desk Review, Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder ($74) 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/metabo-hpt-g12sr4-vs-ridgid-r86040b/
License: CC BY 4.0.