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Tooth Geometry Guide

TCT Saw Blade Hook Angle and Tooth Geometry Guide for Metal Cutting

Understand TCT saw blade hook angle, rake angle, TCG tooth geometry, gullet shape and blade stability for steel, stainless steel, tube and solid bar cutting.

Focus keyword: TCT saw blade hook angle

Secondary keywords: saw blade rake angle, TCT blade tooth geometry, TCG tooth saw blade, metal cutting saw blade tooth design

Search intent: A buyer or engineer wants to understand why two blades with the same size and tooth count can cut very differently.

Practical takeaway:

Hook angle and tooth geometry control how the TCT blade enters the metal, forms chips and resists impact. They must be matched to material, feed control, clamping and workpiece shape.

Why hook angle changes cutting behavior

Hook angle, also called rake angle in many cutting discussions, describes how the front face of the tooth approaches the workpiece. A more aggressive geometry tends to pull into the cut. A less aggressive or negative geometry can reduce grabbing but may require the correct feed and machine rigidity.

In metal cutting, this matters because the blade is not only slicing material. It is forming chips under high force. If the tooth enters too aggressively, it can grab, chatter or chip. If it enters too mildly, it can rub, heat the workpiece and shorten blade life.

Hook angle and tooth geometry terms

TermMeaningMetal cutting effect
Positive hook angleTooth leans into the direction of rotation.Can cut aggressively but may grab if the saw, material or clamping is unsuitable.
Zero hook angleTooth face is close to radial.Often gives a more controlled entry than aggressive positive hook.
Negative hook angleTooth leans away from the direction of rotation.Can reduce self-feeding and improve control in certain machines and thin sections.
TCG tooth geometryTriple Chip Grind with alternating chamfer and raker concept.Useful for harder materials, edge strength and controlled chip formation.
GulletChip pocket ahead of the tooth.Must carry chips out of the cut to avoid heat and recutting.
Side clearanceClearance behind the cutting edge.Prevents rubbing and helps keep the blade body away from the cut wall.

Real product and industry references

ReferenceWhat it emphasizesWhy it matters
Carbide Processors angle guideExplains hook angle and warns that aggressive geometry can grab on metal applications.The tooth angle is a safety and control factor, not just a performance detail.
Kinkelder TCT solid stationary bladesDiscusses tooth design, tooth material and coating as part of application matching.Solid steel cutting needs geometry designed for dense material and chip removal.
Kinkelder KINS BLUE MultiHighlights a new TCT tooth, PVD coating and proprietary geometry for chip evacuation.Tube and bundle cutting require geometry that manages chips and changing engagement.
CHEMITOOL steel TCT bladeUses TCG tooth geometry for cutting steel.TCG appears frequently in metal cutting because edge strength and chip control matter.

Problem diagnosis by tooth geometry

Cutting symptomPossible geometry issueWhat to check
Blade grabs at entryHook angle too aggressive for the machine or material.Confirm saw type, feed control, clamping and blade application rating.
Heat marks and rubbingTooth geometry too mild, dull edge or feed too light.Check chip formation, feed rate, coating and tooth wear.
Tooth chippingEdge too fragile, entry impact or unstable workpiece.Check carbide grade, tooth form, clamping and interrupted cutting.
Heavy burrWrong tooth count, geometry or blade stability.Check wall thickness, teeth in cut, runout and exit support.
Chip packingGullet too small for section or tooth count too high.Use a blade designed for the workpiece shape and chip volume.

When to ask for tooth geometry support

  • You cut stainless steel tube and see burrs or heat marks.
  • A blade with the correct OD and bore still chips teeth.
  • You switch from tube to solid bar but keep using the same blade.
  • The saw grabs the material at entry.
  • The machine is automatic and blade life varies by batch.

Information needed to recommend hook angle and geometry

  1. Material grade and tensile strength if known.
  2. Workpiece shape: tube, pipe, profile, solid bar or bundle.
  3. Wall thickness or solid diameter.
  4. Saw type, feed mode and RPM.
  5. Current blade tooth count and geometry if known.
  6. Photos of the cut face and failed teeth.

Need geometry help for a cutting problem?

Send photos of burrs, heat marks or chipped teeth together with the current blade specification. Ciswerk can help identify whether tooth count, hook angle, coating or process settings are likely involved.

Send cutting problem

Sources Used

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