Metabo HPT G1812DFQ4: problems, parts and running costs

Checked: 2026-10-12

Summary

A compact 18V brushless cordless angle grinder sold as a bare tool; it accepts Metabo HPT 18V and 18V/36V MultiVolt batteries from 1.5Ah to 8.0Ah, which are sold separately [1]. Running costs are the battery and charger plus the abrasive wheel [1]. At $169 bare tool from Burns Tools it is a reasonable addition if you already own Metabo HPT batteries, and a poor one if you do not [4].

Common problems and fixes

Bare tool only — battery and charger are sold separately, so the total startup cost with a battery and charger is significantly higher than the $169 sticker price [4][1].
No exact-model owner feedback — no Reddit or forum discussions of this model were found; only brand-level sentiment [5][6].
Lower no-load speed than some competitors — 8,000 RPM against the RIDGID R86047B at 9,000 RPM and the older Metabo HPT G18DBALQ4 at 9,000 RPM [10][7].
1-year tool body warranty is shorter than some competitors — RIDGID offers a lifetime service agreement on the R86047B [1][10].
Auto-mode trigger is undocumented — Auto-mode drops to 5,500 RPM when unloaded, but public materials do not document what switches it back to full speed under load [1].

Parts and consumables

4-1/2 in depressed center wheel (316821) — included; a consumable [1].
Wheel guard (375903) — included [1].
Side handle (336865) — included; three positions [1].
Wrench (938332Z) — included [1].
Fine-mesh dust filter — user-serviceable; protects the motor [1].
Battery and charger — sold separately; 18V batteries from 1.5Ah to 4.0Ah and MultiVolt 5.0Ah and 8.0Ah packs, with 8.0Ah the maximum runtime option [1].

Yearly running cost

Not enough data. The tool needs a battery and charger bought separately and a consumable wheel, and the sources give no yearly figure [1][4].

When it is a good buy

Burns Tools lists the G1812DFQ4M bare tool at $169.00 [4].
At $150 to $170 bare tool it is a reasonable choice only for users who already own Metabo HPT 18V batteries; for buyers without them, the total cost of grinder plus battery and charger approaches kit-price offerings from DeWalt, Milwaukee and Makita [4].
Named alternatives: the RIDGID R86047B runs 9,000 RPM with a lifetime service agreement and is the better choice if you value that coverage [10]; the older Metabo HPT G18DBALQ4 runs 9,000 RPM at 5.5 lbs [7]; the 36V G3612DVFQ6 offers 1,500 W and variable speed 3,200 to 10,000 RPM for heavy work [8].