What's inside
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When a reciprocating saw blade meets nail-embedded lumber, ordinary bi-metal teeth can lose their edge quickly. The practical choice is often between Diablo’s Demo Demon carbide blade and Milwaukee’s AX carbide blade. Both are made for demolition work, but they favor different cutting styles. The Diablo is the more versatile option for mixed demolition; the Milwaukee AX is often the better choice when speed through heavily fastened framing matters most.
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What you are cutting
Nail-embedded wood is harder on a blade than clean dimensional lumber. A blade may cut through a 2×4 easily, then hit several nails in succession while dismantling a wall, roof deck, pallet, or crate. The steel fasteners create heat, vibration, and tooth shock. A conventional 10- or 12-tooth-per-inch bi-metal blade may survive a few nails, but its teeth can become rounded or missing before the wood cut is finished.
Carbide-tipped demolition blades use larger, harder cutting edges that tolerate embedded nails better. They are not indestructible. Hardened screws, masonry fragments, and twisting the saw in the kerf can still chip carbide teeth. They also cost more, so the right comparison is not simply which blade lasts longest. It is whether the extra life and cutting speed justify the purchase for your job.
Diablo Demo Demon
Diablo’s Demo Demon carbide blades are aimed at general demolition, including wood with nails. Typical versions use a relatively fine tooth pattern compared with aggressive wood-only demolition blades. That gives them a useful balance: they can cut framing cleanly, handle occasional metal contact, and make more controlled cuts around openings or trim.
Their main strength is versatility. If one cut involves a stud with two nails, the next involves clean lumber, and the third involves a thin metal bracket, the Demo Demon is less of a specialized bet. The narrower kerf and more moderate tooth pattern also tend to feel smoother in a compact reciprocating saw.
The trade-off is speed in extremely nail-heavy material. A fine or moderate tooth pattern carries more teeth through the work at once. That can make the blade slower when ripping through old framing loaded with nails, roofing nails, and screws. Applying heavy forward pressure usually makes this worse by increasing heat and encouraging tooth damage.
For a homeowner doing occasional remodeling, a Diablo Demo Demon carbide blade is a sensible general-purpose purchase. It is especially appropriate when cut control and reasonable performance in both wood and fasteners matter more than maximum demolition speed.
Milwaukee AX carbide
Milwaukee’s AX carbide blades use large carbide teeth and an aggressive demolition geometry. Common AX wood-and-nail versions are built to remove material quickly, with a coarse tooth pattern suited to thick framing and heavily fastened lumber. The blade feels more like a demolition tool than a general-purpose saw accessory.
That coarse geometry is an advantage when cutting through a wall stud, joist, pallet, or roof assembly containing many nails. Fewer, larger teeth clear chips effectively and reduce the number of tooth impacts required to cross a thick piece of wood. In the right material, the AX can cut noticeably faster than a finer blade.
It is less refined for small, clean cuts. The aggressive teeth can grab at thin stock, shake the workpiece, or leave a rougher kerf. They also demand a firm grip and good shoe contact. If the saw is allowed to bounce, the impact loads can chip carbide teeth. Milwaukee makes several AX configurations, so check the printed tooth count and intended material before buying; “AX” alone does not identify one universal blade.
A Milwaukee AX carbide blade for wood and nails makes more sense for repeated demolition, especially when the workpiece is thick and packed with fasteners.
Head-to-head comparison
| Factor | Diablo Demo Demon carbide | Milwaukee AX carbide |
|---|---|---|
| Best use | Mixed demolition and remodeling | Fast cutting through heavy framing |
| Tooth character | Moderate, controlled demolition pattern | Coarse, aggressive demolition pattern |
| Nail-embedded wood | Very capable | Usually the stronger choice |
| Clean wood | Smoother and easier to control | Fast but rougher and more grabby |
| Thin material | More forgiving | More likely to vibrate or snag |
| Price value | Better if used across varied jobs | Better when demolition speed and blade life matter |
Which blade should you buy?
Choose the Demo Demon if you are removing a window, cutting a few studs, trimming framing in place, or handling a mixture of clean wood and occasional nails. It is the safer default for a general tool box. The cheaper option is fine here if the job is small: a bi-metal demolition blade can be adequate for a handful of cuts, particularly when the nails are sparse and you can afford to discard the blade afterward. A carbide blade earns its premium when the fasteners are numerous or the work would otherwise require several blades.
Choose the AX carbide when you are doing repeated structural demolition and expect the blade to spend much of its time crossing nails. This includes tear-out work on old framing, pallets, nailed flooring, and roof assemblies. The AX’s aggressive teeth can save time, but only if the saw has enough power and the operator lets the blade cut rather than forcing it.
For the most demanding jobs, buying one of each style is more useful than buying several identical blades. Use the AX for long, fast cuts through thick nail-filled members, then switch to the Diablo for controlled cuts near surfaces you want to preserve. If you need a broader assortment, compare carbide reciprocating blades for wood with nails by tooth pattern and length, not just brand.
How to make either blade last
Keep the saw shoe firmly against the work and start at full speed before contacting the material. Use moderate pressure; if the motor slows sharply, back off. Letting the blade flex sideways is one of the quickest ways to chip carbide teeth. For a long cut, withdraw the blade briefly if it becomes too hot to touch after stopping.
Use a blade at least 6 inches longer than the material thickness when access allows. Extra length provides room for the shoe to stay planted and reduces the chance of burying the entire tooth set. Wear eye protection, gloves, and hearing protection, and expect hidden nails to throw hot chips. Neither blade is a substitute for checking for live wiring, plumbing, or structural loads before cutting.
The practical choice
The Diablo Demo Demon is the better all-rounder and the easier recommendation for varied remodeling. Milwaukee’s AX carbide is the more specialized demolition blade: choose it when thick, nail-loaded wood is the main target and cutting speed matters. For a small occasional project, a cheaper bi-metal blade can still be economical. For repeated nail-embedded cuts, carbide—particularly the AX for aggressive work—usually pays for itself in fewer blade changes and less stalled progress.