Milwaukee M18 FUEL ONE-KEY 3/4 in. High-Torque Impact Wrench 2864-20: problems, parts and running costs

Checked: 2026-10-13

Summary

The 2864-20 is an 18V M18 FUEL 3/4 inch high-torque impact wrench rated at up to 1,200 ft-lbs fastening and 1,500 ft-lbs nut-busting, sold tool-only at $429 at Northern Tool and Ohio Power Tool. No owner discussion and no independent torque test were found, so those torque figures stand as manufacturer claims, and the concrete cautions are around accessories: the protective boot sold alongside this tool does not fit it. Running costs are M18 batteries, a charger and sockets if you do not own them; at $589 to $679 the kit is the practical entry point.

Common problems and fixes

The protective boot does not fit — the 49-16-2864 boot marketed alongside this tool fits only the 1-inch 2867-20, confirmed by retailer Q&A staff; it lists at $49.00 at Northern Tool. Fix: verify fitment before buying accessories. [4]
Impact rate differs across retailer spec sheets — Graybar and Northern Tool’s kit page list 2,400 IPM while DSG Supply lists 2,100 bpm; unresolved, so treat 2,100 as the conservative figure. [1][2][5]
Torque claims are unverified — 1,200 and 1,500 ft-lbs are consistent across retailer spec sheets, but no instrumented test of this exact model has been published. [1][2][5][6]
Sold tool-only — no battery, charger or case in the box, so the entry cost depends on the M18 batteries you already own. [3][6]
Kit model numbers differ — Milwaukee lists the kit as 2864-22R and Northern Tool as 2864-22; functionally equivalent kits with the same tool. [3][5]
ONE-KEY adds little for a single owner — the four saved profiles, 100 ft tracking, lock-out and remote shut-off are fleet features with limited benefit for one user. [3][8]

Parts and consumables

M12/M18 multi-voltage charger (48-59-1812) — sold separately; not included with the bare tool. [3]
Protective boot 49-16-2864 — $49.00 at Northern Tool, but it fits only the 2867-20, not this model. [4]
XC5.0 Resistant batteries in the kit — add protection against oils, greases and solvents; 3-year warranty against 2-year on compact packs. [3][5]

Yearly running cost

Not enough data as a yearly total. The research names the recurring costs — M18 batteries, a charger if not owned, and 3/4 in. sockets — but no prices, replacement intervals or electricity figures, so no yearly total could be computed. [6]

When it is a good buy

$429.00 bare tool at Northern Tool and Ohio Power Tool; $589.00 for the tool with a 5.0 Ah battery at Home Depot; $679.00 for the 2864-22R kit at Ohio Power Tool (research check October 2026). [4][6][7]
At $429 it makes sense for an existing M18 owner who needs 3/4 inch torque in an 8.59 inch body; without M18 packs, the $589 to $679 bundle or kit is the real entry price. [6][7]
Milwaukee 2864-22R kit — the better choice when you do not own M18 batteries; it bundles two XC5.0 Resistant batteries, the multi-voltage charger and a case. [3][6]
DeWalt or Ingersoll Rand high-torque wrenches — the better choice when you want measured torque, since no independent test data exists for the 2864-20.