Cordless circular saws: blade size, cutting depth and battery fit

Measure the cut before choosing a blade size

Choose a circular saw by the cuts it must complete: material, actual thickness and required angle. Blade diameter is useful for narrowing the list, but the published cutting capacity tells you how far that particular saw reaches below its base. Do not assume two saws with the same diameter have identical clearance.

This guide compares four exact US-market models already in Etrenank's catalog. It is a selection aid for documented capacities, not a cutting-speed contest. Start with the thickest and most demanding angled cut on your project list; a saw that meets only the easiest cut may leave the main job unresolved.

Blade diameter and maximum depth are different measurements

Notice the difference within the 6-1/2-inch group: the DCS565B has 1/8 inch less stated square-cut depth than the other two. That distinction matters only when your required cut approaches the limit. If every planned piece is comfortably within capacity, use the remaining selection criteria instead of buying extra depth without a purpose.

Check depth at the angle you will actually use

Maximum bevel angle describes how far the saw tilts; it does not describe how thick a board it can cut at that angle. Makita lists the XSH03Z at 1-5/8 inches deep at 45°, versus 2-1/4 inches square. Milwaukee's 2833-20 release lists 1.73 inches at 45° [5] [4].

For example, a board measured at 2 inches thick is within the listed square-cut capacity of all four saws, but exceeds both of those cited 45° capacities. That is a geometry check, not a claim about how quickly either saw cuts. Make a separate line in your requirements for square cuts and for each bevel you need. Keep the angle conventions clear: a 90° square cut is the saw's 0° bevel position.

Choose a suitable blade within the saw's specification

When ordering a blade, match the permitted diameter, arbor interface, speed rating and application to the exact saw's instructions. The maximum-depth adjustment is not permission to fit a larger blade. Record the required blade specification alongside the saw model so that a later accessory purchase does not rely on a remembered diameter alone.

The DCS565 manual limits its intended use to wood cutting [2]. A different blade does not itself authorize a different material. If your project includes sheet metal, masonry or another material outside a saw's intended use, resolve that tool requirement separately before buying.

Check the battery boundary before comparing packages

DeWalt identifies the DCS565B as a 20V MAX saw compatible with its 20V MAX and FLEXVOLT batteries [1]. The DCS578B requires the 20V/60V MAX FLEXVOLT system [3]. Existing DeWalt ownership therefore needs an exact battery check, not just a matching brand name.

The Milwaukee option belongs to M18, while the Makita option belongs to 18V LXT [6] [5]. Compare the complete equipment you would need to add. Use the FLEXVOLT compatibility guide for the direction of the DeWalt relationship and the package guide to verify batteries, chargers and accessories.

Use controls to break a practical tie

Milwaukee documents depth detents at 1/2, 3/4 and 1-1/2 inches on the 2833-20, plus an included vacuum adapter [6]. These are concrete features to consider if you repeatedly adjust for sheet thickness or connect dust extraction. Their value depends on your workflow; they do not establish that this model makes a better cut.

Before deciding, check whether your shortlist fits the actual support setup, working space and extraction equipment. When comparing weight, distinguish a bare-tool figure from a figure that includes a battery. Do not combine unlike battery conditions or manufacturer runtime claims into a cross-brand score.

Remove the battery before blade changes or adjustments, secure the workpiece, and follow the exact manual's guard and cutting-depth instructions [2]. Then select the saw that satisfies your documented cut requirements with the equipment you intend to use. Etrenank has not performed hands-on cut-quality, noise or endurance testing, and these US model references do not establish equivalence with regional versions.