Key takeaways
- TPI vs. wall thickness: Keep at least three teeth in the cut at all times. Thin-wall tube and sheet need 18–24 TPI; solid bar over 1/2″ wants 6–10 TPI so the gullets can clear chips instead of packing up.
- Bi-metal is non-negotiable: An M42 high-speed-steel tooth edge welded to a flexible alloy back gives you hardness where it cuts and fatigue resistance where it flexes around the wheels. Carbon steel blades die on mild steel in minutes.
- Measure your loop length twice: 93″ and 93-1/2″ look interchangeable on paper and absolutely are not on your machine. Check the manual or measure your old blade before ordering.
- Set pattern changes the finish: Raker and vari-raker sets cut fast with a rougher face; wavy set spreads tooth wear across the width and leaves a cleaner edge on tubing and thin profiles.
- Match width to your cut: A 3/4″ blade tracks dead straight through heavy stock. Drop to 1/2″ if you need any curve at all or if your saw’s wheels are small enough to overstress a wide band.
What's inside
If you’ve ever stood at your bandsaw watching a blade wander off the line halfway through a piece of 2″ square tube, you know the frustration. Metal-cutting blades fail in specific, predictable ways: teeth strip off when the pitch is wrong for the wall thickness, the blade work-hardens the cut and dulls in seconds, or the weld snaps because the wheel diameter was too tight for the gauge. None of that is bad luck. It’s almost always a mismatch between the blade spec and the stock going through it, and the fix costs less than a decent lunch.
This guide is written for the workshop where metal and furniture overlap — welding up hairpin legs, cutting steel angle for a bench frame, trimming brass rod for hardware. I’ve broken down the specs that actually matter (TPI, kerf, bi-metal construction, set pattern) and reviewed six blades that cover the realistic range from a benchtop 4×6 horizontal saw to a portable band saw you carry to the job. Every pick below is a bi-metal or hardened-tooth blade rated for ferrous work, not a repurposed wood blade.
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How to Choose a Band Saw Blades For Metal (2026)
- TPI vs. wall thickness: Keep at least three teeth in the cut at all times. Thin-wall tube and sheet need 18–24 TPI; solid bar over 1/2″ wants 6–10 TPI so the gullets can clear chips instead of packing up.
- Bi-metal is non-negotiable: An M42 high-speed-steel tooth edge welded to a flexible alloy back gives you hardness where it cuts and fatigue resistance where it flexes around the wheels. Carbon steel blades die on mild steel in minutes.
- Measure your loop length twice: 93″ and 93-1/2″ look interchangeable on paper and absolutely are not on your machine. Check the manual or measure your old blade before ordering.
- Set pattern changes the finish: Raker and vari-raker sets cut fast with a rougher face; wavy set spreads tooth wear across the width and leaves a cleaner edge on tubing and thin profiles.
- Match width to your cut: A 3/4″ blade tracks dead straight through heavy stock. Drop to 1/2″ if you need any curve at all or if your saw’s wheels are small enough to overstress a wide band.
The Best Band Saw Blades For Metal (2026)s Reviewed
Imachinist M42 93″ x 3/4″ 10/14 TPI
This is my default loop for a 4×6 horizontal saw doing mixed structural work — the 10/14 variable pitch handles 1/8″ wall tube and 1″ solid round without a blade change, and the variable spacing kills the harmonic squeal you get from constant-pitch blades. Excellent value for the M42 tooth quality.
Imachinist M42 93-1/2″ x 1/2″ 24 TPI
Reach for this when you’re cutting thin-wall EMT, brass tube, or aluminum extrusion for furniture hardware — 24 TPI keeps enough teeth engaged that nothing catches and tears. Run it slow and let the fine pitch do the work; it clogs if you force feed pressure.
Lenox Diemaster 2 Vari-Raker 1/2″ 6-10 TPI
The Diemaster 2 is the blade I recommend when someone is cutting genuinely thick stock and losing blades to premature tooth wear. The vari-raker geometry with positive rake bites aggressively into solid bar and heavy plate, and Lenox’s weld consistency is the best in this group.
Lenox Classic Tuff Tooth 93″ x 3/4″ 18 TPI
Tuff Tooth’s hardened tooth tips and wavy set make this the cleanest-cutting blade here on thin material, leaving an edge that needs minimal deburring before welding. The 0.035″ body is stiff enough to resist wander on long rips through angle iron.
Bosch BS9312-18MA 93-1/2″ 18 TPI
A dependable single-blade replacement for stationary saws, well suited to conduit, threaded rod, and light angle. It’s a straightforward general-purpose 18 TPI blade rather than a specialist, which is exactly what most hobby shops need on the machine most of the time.
Frequently Asked Questions
Can I use a metal blade for wood?
Technically yes, but the fine pitch loads with sawdust and burns instead of cutting. Keep separate blades — swapping a loop takes under two minutes and both last far longer.
What speed should I run for steel?
Mild steel likes roughly 150–250 SFPM; stainless and tool steel want the slow end, around 80–120. Aluminum and brass can run considerably faster. Chips should curl, not turn blue.
Do I need cutting fluid?
On ferrous stock it roughly doubles blade life. A brushed-on paste lubricant or a drip of soluble oil is enough on a benchtop saw; skip it entirely on aluminum where it gums the gullets.
Why did my new blade break at the weld?
Usually excessive tension, a wheel diameter too small for the blade thickness, or running a brand-new blade at full feed. Break in a fresh blade with light pressure for the first 50 square inches of cut.
Final Thoughts
For most home shops building metal-framed furniture, the Imachinist M42 10/14 TPI is the blade to keep on the saw — it handles the widest range of stock for the least money. Step up to the Lenox Diemaster 2 when you’re regularly cutting solid bar and want maximum tooth life, and keep a Lenox Classic Tuff Tooth or the Bosch BS9312-18MA on the shelf for thin-wall tube where finish quality matters.
