Standard, hook, variable pitch or profile tooth? How each band saw tooth form works and which to choose for aluminium, tube, profiles and solid steel.
Updated October 2026
Quick answer: Tooth form is the shape of each tooth: rake angle, gullet and tooth back. Standard (0° rake) suits thin walls and small sections; hook (positive rake) suits solids, thick-wall tube and aluminium; profile tooth (reinforced back) suits beams, profiles and bundles. Variable pitch reduces vibration in interrupted cuts. Choose TPI separately.
What “Tooth Form” Means (and How It Differs from TPI)
Tooth form describes the geometry of each individual tooth. Four features matter most:
- Rake angle – the angle of the cutting face. Zero rake scrapes; positive rake leans forward and shears.
- Gullet – the space in front of the tooth that carries the chip out of the cut.
- Tooth back – the material behind the tip; a reinforced back resists breaking in interrupted cuts.
- Set – how teeth are bent left and right to give the blade body clearance.
TPI (teeth per inch) is a different choice: it tells you how many teeth there are, not what shape they have. Pick the pitch for your section with our band saw blade TPI selection guide, then use this page to choose the shape.
The Main Tooth Forms
Standard / Regular Tooth (0° Rake)
The standard tooth has a straight cutting face with zero rake. It scrapes rather than shears, and its compact shape is robust. It is a common choice for small sections, thin-wall profiles and tubes, high-carbon steel and cast iron, where short chips form and a strong, simple tooth helps. Source: Röntgen band saw blade catalogue (2017/2018 edition, tooth forms – “normal tooth”).
Hook Tooth (Positive Rake)
The hook tooth leans its cutting face forward. It shears the chip, needs lower cutting force and usually has a larger gullet to carry chips away. It is the usual starting point for solid bar, thick-wall tube, alloyed steels and non-ferrous metals including aluminium. Source: Röntgen band saw blade catalogue (tooth forms – “hook tooth”).
Variable Pitch (Combi) Tooth Arrangement
Variable pitch is not a tooth shape but a spacing pattern: the distance between teeth changes within a repeating group, written for example as 4/6. Because the teeth do not strike the work at an even rhythm, resonance and vibration are reduced. It is used for tube, profiles, bundles and set-ups with weak clamping, and is usually combined with a hook or profile tooth. For which pitch to use on which section, see the band saw blade TPI selection guide.
Profile / Structural Tooth
The profile tooth combines a positive but moderate rake with a reinforced tooth back, and is usually made in a variable pitch. The stronger tooth withstands the shocks and vibration of interrupted cuts – beams, angles, channels, hollow sections and bundles – where each tooth repeatedly enters and leaves the material. Source: Röntgen band saw blade catalogue (tooth forms – “profile tooth”).
Some makers also offer special forms, for example teeth with a high pre-cutter for stainless steel or very aggressive geometries for non-ferrous metals. Ask us if your application needs something beyond the four forms above.
Which Tooth Form for Which Job
Use this as a starting point, then check chips, sound and finish. Pitch numbers are deliberately left out – take them from the band saw blade TPI selection guide.
| Workpiece | Usual tooth form starting point | Pitch | Notes |
|---|---|---|---|
| Aluminium solid / thick extrusion | Hook (positive rake), large gullet | Coarse to medium – see TPI guide | Chip welding risk: gullet room and lubrication matter |
| Aluminium thin-wall profile | Hook or profile tooth, variable pitch | See TPI guide (aluminium profiles) | Keep enough teeth in the wall |
| Thin-wall steel tube | Standard (0°) or profile tooth, variable pitch | Fine – see TPI guide (tube) | Sources differ – see note below |
| Thick-wall tube | Hook, variable pitch | See TPI guide (tube) | — |
| Beams, angles, channels, structural profiles | Profile / structural tooth, variable pitch | See TPI guide (profiles) | Interrupted cut: tooth back strength matters |
| Bundles | Profile tooth, variable pitch | Based on one piece, then often one step finer – see TPI guide | Clamp the bundle firmly |
| Solid carbon / alloy steel | Hook; constant or variable pitch | See TPI guide (solid) | Constant pitch fine with rigid clamping |
| Small solids, high-carbon steel, cast iron | Standard (0°) | See TPI guide | — |
Thin-wall steel tube – two valid starting points. The Röntgen band saw blade catalogue advises a 0° rake for thin-walled tubes, while other makers place hollow sections under a reinforced profile tooth. Both work in practice. Start with either a standard tooth or a profile tooth in variable pitch, then decide by chip shape, noise and vibration on your machine.
Tell us what you cut and the blade you run now – we’ll suggest a tooth form and pitch to test. Include material and section, current blade width × thickness × length, current TPI and tooth form, machine model, coil or loops, quantity and country. Use the RFQ form, WhatsApp +86 131 7575 3620 or sales@lizensaw.com.
Aluminium: Why Tooth Form Matters More Than for Steel
Aluminium is soft and produces long, stringy chips. These can weld onto the teeth (gumming or galling), pack the gullets and spoil the finish. A positive-rake hook tooth shears the chip cleanly and generates less heat, a deep gullet gives the chip somewhere to go, and variable pitch calms vibration on thin extrusions. Good lubrication helps keep chips from sticking.
DoALL describes the same principles: bimetal as the general-purpose default for mixed aluminium work, positive rake with deep gullets for chip clearance, and variable pitch for extrusions; it also mentions carbide for high-volume or abrasive alloys. LIZEN supplies bimetal blades. Pitch for aluminium is covered in our band saw blade TPI selection guide. Source: DoALL: The Best Band Saw Blade for Aluminum.
Tube and Profiles: Vibration and Tooth Breakage
On tube, beams and angles the blade cuts an interrupted section: each tooth enters the wall, cuts a short distance, leaves, and hits the next wall. These repeated shocks cause vibration, noise and broken teeth. Two tooth-form choices help: variable pitch, which breaks up the rhythm, and a profile tooth with a reinforced back, which tolerates the impacts. Firm clamping matters as much as the blade.
Raymond Robert, a WIKUS distributor in Canada, makes the same point: variable tooth profiles reduce vibration, and positive-tooth blades are recommended for aluminium. Source: Raymond Robert Machinery: How to choose a metal band saw blade. For bundles, choose pitch from one piece rather than the bundle size – see the band saw blade TPI selection guide.
Solid Steel: Hook Tooth and Pitch First
For solid carbon and alloy steel bar, a hook tooth is the usual starting point. Constant pitch works well when the bar is clamped rigidly; variable pitch helps with mixed sizes or when vibration appears. Small solids, high-carbon steel and cast iron are often cut with a standard tooth.
For stainless steel, get pitch right first, then the grade. Changing M42 to M51 will not fix a wrong tooth or TPI choice – see M42 vs M51 bimetal blades. Dedicated stainless and solid-bar guides are planned.
Tooth Form, Set and Grade – How They Fit Together
- 1. Section: solid, tube wall, profile or bundle.
- 2. Pitch (TPI): from the band saw blade TPI selection guide.
- 3. Tooth form: from this page.
- 4. Grade: M42 or M51 – see M42 vs M51 bimetal blades.
Set pattern follows the pitch: raker set is typical on constant-pitch blades, while variable and fine-pitch blades often use group or wavy set. Source: Röntgen band saw blade catalogue (set patterns). Speed, feed and tension starting points are in the band saw blade TPI selection guide.
What to Send LIZEN
- material and section (solid, tube wall thickness, profile or bundle);
- current blade width × thickness × length;
- current TPI and tooth form;
- machine model;
- coil stock or welded loops;
- quantity and country.
Buying from LIZEN
LIZEN (Foshan) makes all common tooth forms – standard, hook, variable pitch and profile tooth – in M42 and M51 bimetal. Not every form is available in every grade, width and pitch, so please contact us to confirm availability for your size. We supply coil stock for local welding centers (MOQ 1,000 m) and welded loops (300 loops for a first trial order; mixed sizes allowed). A controlled sample test can be discussed. Not sure of your size? Try the blade selector.
FAQ
What is the difference between a hook tooth and a regular (standard) tooth?
A standard tooth has a straight cutting face with zero rake, so it scrapes the chip off and is robust in small sections and thin walls. A hook tooth leans its face forward with positive rake, so it shears the chip with lower cutting force and usually has a larger gullet, which suits solids, thick-wall tube and aluminium.
Which band saw tooth form is best for aluminium?
A hook tooth with positive rake and a large gullet is the usual starting point for aluminium, because it shears soft chips and gives them room to clear, reducing chip welding. For thin-wall extrusions, a hook or profile tooth in a variable pitch helps against vibration. Choose the pitch with our TPI selection guide.
Which tooth form should I use for tubes?
For thick-wall tube, a hook tooth in variable pitch is a common starting point. For thin-wall steel tube, makers differ: some advise a standard zero-rake tooth, others a profile tooth with a reinforced back. Both are valid starting points; test one and judge by chips, sound and vibration. Choose pitch by wall thickness.
What is a profile (structural) tooth band saw blade?
A profile or structural tooth has a positive but moderate rake and a reinforced tooth back, and is usually made in a variable pitch. The stronger tooth resists breakage and vibration in interrupted cuts such as beams, angles, channels, hollow sections and bundles, where each tooth repeatedly enters and leaves the material.
Is variable pitch a tooth form?
Not strictly. Variable pitch describes spacing: the distance between teeth changes within a repeating group, written for example as 4/6. It breaks up resonance and vibration. It is combined with a tooth shape, usually hook or profile tooth, so you choose the spacing and the tooth form together.
Which tooth form should I use for solid steel bar?
A hook tooth is the usual starting point for solid carbon and alloy steel. Constant pitch works well when the bar is rigidly clamped; variable pitch helps when sizes are mixed or vibration appears. Small solids, high-carbon steel and cast iron are often cut with a standard zero-rake tooth.
Does tooth form replace choosing the right TPI?
No. TPI decides how many teeth share the cut; tooth form decides the shape of each tooth. A good tooth form cannot fix a pitch that is too coarse or too fine for the section. Choose TPI first with our band saw blade TPI selection guide, then the tooth form, then the grade.
Does LIZEN make all these tooth forms, and what is the MOQ?
Yes. LIZEN makes standard, hook, variable pitch and profile tooth forms in M42 and M51 bimetal, as coil stock and welded loops. Not every form is offered in every width and pitch, so contact us to confirm availability for your size. MOQ: 1,000 m coil; welded loops 300 for a first trial order, mixed sizes allowed. WhatsApp +86 131 7575 3620.
Tell us what you cut and the blade you run now – we’ll suggest a tooth form and pitch to test. Include material and section, current blade width × thickness × length, current TPI and tooth form, machine model, coil or loops, quantity and country. Use the RFQ form, WhatsApp +86 131 7575 3620 or sales@lizensaw.com.