Best SDS-Max Rotary Hammer 2026: DeWalt vs Milwaukee vs Bosch vs Makita

SDS-Max is the format contractors reach for once a job outgrows SDS-Plus — larger anchors, rebar doweling, core drilling, and sustained chipping work. All four cordless options below are matched in the same 1-9/16" chuck class so the comparison is apples-to-apples, with every spec cross-verified against the manufacturer or an independent hands-on test.

SDS-Max vs SDS-Plus — Do You Actually Need It?

Move up to SDS-Max if any of these apply to your work:

• Anchor or rebar dowel diameter exceeds 1" — SDS-Plus tops out at 1-1/8" total hole diameter and struggles above roughly 3/4" in dense or reinforced concrete
• You’re coring holes larger than 1-1/8" — SDS-Max tools here handle core bits up to 4"+ depending on the model
• You do sustained chipping or light demolition, not just drilling — SDS-Max motors and hammering mechanisms are built for continuous duty cycles that would overheat an SDS-Plus tool
• You’re setting rebar dowels (#5–#9 bar) for structural connections, which need larger, deeper holes than SDS-Plus is rated for

Stay on SDS-Plus if you’re drilling anchors 1/4"–1" for wedge, sleeve, or Tapcon anchors — that covers the vast majority of residential and light-commercial work. See our SDS-Plus rotary hammer guide for that comparison.

Real Specs by Brand

Sizes verified against manufacturer specifications and independent hands-on testing — July 2026.

Vibration Exposure: A Real Difference Between These Four

Manufacturers publish a vibration emission value (a_h, measured to EN60745/ISO 28927) for most rotary hammers — and for three of these four, the numbers are public. The gap between them is large enough to matter for anyone running one of these tools through extended chipping or drilling sessions.

The EU/UK Control of Vibration at Work Regulations use an 8-hour energy-equivalent exposure value, A(8): an Exposure Action Value of 2.5 m/s² A(8), where exposure is expected to start being actively managed, and an Exposure Limit Value of 5.0 m/s² A(8), which should not be exceeded. Applying the standard formula — A(8) = a_h × √(T/8) — to each tool’s published value gives a rough sense of how much actual trigger time it takes to reach those thresholds:

These figures use each manufacturer’s own published test data and the EU exposure formula as a reference point, not a literal safety limit for any individual — real jobsite vibration varies with material hardness, bit condition, and technique. The U.S. does not currently set an enforceable OSHA permissible exposure limit for hand-arm vibration the way the EU does; NIOSH publishes exposure guidance rather than a binding standard. Bosch does not publish a vibration figure for the GBH18V-36CN on its U.S. product pages.

Wet vs Dry Core Drilling

Core bits for these hammers fall into two types, and they behave differently:

• Carbide-segment core bits run in hammer + rotate mode, the same as a standard SDS bit — they work dry, generate real silica dust, and are the simpler option if you already own the rotary hammer and nothing else.
• Diamond core bits cut by grinding rather than pounding, and need rotation-only mode for a clean cut and reasonable bit life — running one in hammer mode wears it out fast. Every SDS-Plus tool supports rotation-only mode; not every SDS-Max tool does. Confirm the specific model supports it before buying a diamond bit.

For deep holes, reinforced concrete, or repeated use, wet diamond coring is the better method — water cools the bit, controls dust and slurry, and meaningfully extends bit life. It needs a water supply and containment (a water swivel or dam ring), which isn’t always practical. Dry coring skips the water — better for occasional holes, indoor work without water access, or jobs near live electrical wiring — but it generates significant respirable crystalline silica dust. OSHA’s Table 1 (1926.1153) requires effective engineering controls for dry drilling and coring in concrete; in practice that means a HEPA vacuum dust collection system with a shroud around the bit, not just a dust mask.

DeWalt DCH481

The DCH481 runs on DeWalt’s 60V FLEXVOLT platform, which shares batteries with DeWalt’s larger corded-replacement tools. At 6.1 joules of impact energy in the 1-9/16" class, it’s a straightforward step up for anyone already invested in the FLEXVOLT ecosystem — no separate charger or battery set needed if you already own a FLEXVOLT tool. It also includes an anti-rotation system that cuts power the instant it detects the tool binding or losing control — a real safety feature if the bit ever catches on rebar.

Milwaukee 2717-20

Part of Milwaukee’s M18 FUEL lineup, the 2717-20 runs on the largest cordless battery ecosystem available from any single brand. At 12.15 lbs bare, it’s in the same light-tool cluster as DeWalt and Bosch — all three sit under 13 lbs, with Makita the clear outlier at 16.8 lbs. Sold as a bare tool, it’s the obvious pick for contractors already carrying M18 batteries for drills, impact drivers, and other jobsite tools. It also runs Milwaukee’s REDLINK PLUS Intelligence, which actively manages tool and battery temperature to prevent overload damage during extended chipping sessions.

Bosch GBH18V-36CN

Part of Bosch’s PROFACTOR line, the GBH18V-36CN pairs BITURBO brushless technology with the CORE18V High Power battery platform to target corded-tool performance from an 18V cordless package. At 11.3–13.4 lbs depending on configuration, it has the best power-to-weight ratio of the four — a real advantage for overhead anchor and dowel work. Bosch’s KickBack Control also cuts power automatically if the bit binds in the hole, reducing the risk of the tool twisting out of your hands.

Makita XRH07

Makita’s entry into cordless SDS-Max is recent — the category itself only gained real cordless options in the past few years. Independent hands-on testing found the XRH07’s Advanced AVT vibration control noticeably better than competing brands, which matters directly for extended drilling or chipping sessions. At 16.8 lbs it’s the heaviest of the four, a real tradeoff for that vibration control. That control comes from a genuinely different mechanism, not just padding — an internal counterbalance uses air pressure to drive counterweight pistons in the opposite direction of the hammering action, actively canceling vibration rather than just absorbing it.

Who Should Actually Buy Which

• Already own batteries on one of these platforms? Buy that brand. The performance gap between all four is smaller than the cost of starting a second battery ecosystem — true regardless of which specific tool you're comparing.
• Solo tradesperson carrying tools between jobs? Bosch’s 11.3 lb low-end weight and best power-to-weight ratio matter more than raw impact energy when you’re the one hauling it up a ladder or across a site all day.
• Sustained chipping or demo work across full shifts? Makita’s vibration control is the real differentiator — nearly 4x longer trigger time before reaching the EU exposure limit than DeWalt or Milwaukee, based on published test data.
• Coring is a regular part of the job? Check core bit compatibility and rotation-only mode support before choosing — not every SDS-Max tool handles diamond core bits equally well (see the coring section above).
• Buying your first SDS-Max tool with no existing platform? Milwaukee’s M18 ecosystem is the largest across the cordless tool market, giving you the most flexibility if you’ll be adding more tools later.

Recommended Tools by Category

All four are matched in the same 1-9/16" chuck class for a fair comparison — stay on your existing battery ecosystem if you have one.

Need more power than any of these four offer? Hilti’s Nuron TE 60-22 is the professional benchmark this category gets measured against, at a significantly higher price point — worth considering for daily structural anchor and rebar dowel work.

Shopping from Canada or the UK? All four are also available on Amazon Canada and Amazon UK.

Prices and availability change — links go to current Amazon listings. As an Amazon Associate, BuildToolHQ earns from qualifying purchases.

Common Mistakes

Frequently Asked Questions

Related Guides

• Best SDS-Plus Rotary Hammers 2026 — The right choice for most anchor work
• Hammer Drill vs Rotary Hammer — When to upgrade from a hammer drill
• Drill Bit Size for Concrete Anchors — Right bit for every anchor
• Anchor Specification Engine — Instant ACI 318-19 compliant anchor sizing