models
Milwaukee 4272-21: Electromagnetic Base & Package
Milwaukee's 4272-21 and 4274-21 share a 1-5/8-inch annular headline but not the same magnet. The 4272-21 uses an electromagnetic base, so power loss changes attachment behavior. No exact 4272-21 Amazon offer is retained: the M18 2787 shown later is a cordless 1-1/2-inch alternative, not this corded model.
As an Amazon Associate I earn from qualifying purchases. Links marked “Check Amazon” are affiliate links.
No exact Amazon match in our selected catalog.
Offers later on this page are clearly labeled alternatives, not the model discussed in this guide.
The 4272-21 is the electromagnetic version
Milwaukee's current package list includes the drill, safety strap, lubrication spray bottle, chuck key, carrying case, a 3/4-inch-Weldon-to-1/2-inch-chuck adapter and two one-inch retractable pilot pins. It does not establish a cutting-depth rating or a 1/4-inch minimum steel rule for this electromagnetic model, so both remain unresolved here.
- Power: 120V corded; confirm unit nameplate
- Annular diameter: 1.625 inches maximum
- Cutting depth: Not confirmed for this guide
- Speed: 475/730
- Cutter interface: 3/4-inch Weldon quick-change
- Base: electromagnetic
Verify the nameplate before comparing the pair
The first comparison should be with the 4274-21 because magnet design separates the two in a way that headline motor size does not. If you are evaluating a used or discounted listing, confirm the exact model on the unit, not just in the seller's title. Then compare the accessories you need for annular and twist drilling.
A workshop with dependable power may be willing to consider an electromagnetic base, while a field job may make power management a more prominent concern. Neither setting excuses an unsupported attachment. Evaluate the working surface, available restraint point and method of controlling the workpiece before deciding which magnet design belongs in the shortlist.
Compare a documented alternative
This Amazon offer is for Milwaukee M18 FUEL 2787, not the source-only model discussed in this guide. Compare it only as a different model and verify its own capacity, power, cutter system and package.
Compare this alternative at AmazonAuto-Stop does not turn it into a permanent magnet
Do not credit the 4272-21 with the 4274-21's permanent-magnet hold during power interruption. The source page confirms Auto-Stop lift-off detection, but that feature does not change its magnet type. Likewise, the supplied spray bottle should not be described as an integrated through-spindle coolant tank without exact documentation.
Questions, answered
Does 4272-21 use a permanent magnet?
No. Milwaukee identifies 4272-21 as its electromagnetic drill. The closely related 4274-21 uses the permanent magnet.
