Hot Cutting Circular Saw Blades

Extraordinary blade life – with the least tendency to crack!

BLECHER hot cutting circular saw blades are the specialists for the rough parting of hot steel items at above 700°C. Numerous particular processing methods and greatest care during manufacturing guarantee top performance at extra demanding requirements for the cutting of bars, billets, rails, sections, tubes and profiles. It is used with stationary sawing plants in hot rolling mills and extrusion lines and diameter up to 2,500mm.


Tooth formsSaw blade materialTypical main dimensionsSawing machineFinish of side faces

Tooth forms


  • 30°/30° pendulum tooth (standard)
  • T18 special tooth with double radius
  • 30°/30° pendulum tooth with flatland
  • slant teeth
  • forged teeth

Saw blade material:

BL60 is a BLECHER exclusive, unique material for best possible blade life at least possible tendency to cracking (for tooth tip hardened blades). Other materials with carbon content as given by the application (the Carbon content determines hardness = blade life and its tendency to crack by a large amount):

  • 75 Cr 1 (1.2003) standard for smaller diameters, hardened and tempered all over, C = 0.78%
  • BLECHER special steel grades BL50, BL55 and BL80 for all diameters, alloys optimized for long blade life and low addiction to cracking

Typical main dimensions

Diameter mm Kerf mm Teeth Tooth Spacing mm
680 6 180 6,63
780 6 280 8,75
900 7 300 9,42
1000 8 260 12
1200 8 314 12
1600 10 500 10
1800 12 470 12
2000 12 524 12
2200 14 384 18
2500 16 436 18


Conditions of application:

  • Vary with the machine used and workpieces to be cut
  • Cutting speed: 110-150 m/s
  • Feeding speed: approx. 1000-3000 mm2/s
  • Cooling: high pressure cooling with water

Sawing machine:

Stationary horizontal cut-off-saws by e.g. Abbey Etna, Kocks, Mannesmann,Schloemann-Siemag, Danieli-Morgardshammar, Koch-HK, SMS-Meer, Wean United, etc.

Finish of side faces:

  • Black rolled (standard) finish = side faces of saw blade not ground for moderate cutting clearance, BLECHER always balances also black rolled saw blades!
  • flat ground finish = side faces of saw blade parallel ground upon customer request
  • hollow ground and off-set finish: side faces are hollow ground, optionally off-set ground and balanced after flat grinding; for maximum cutting clearance, reduce burr forming and high cut quality

BLECHER QualitY Features

Application oriented selection of blade materialSpezielle Werkstoffauswahl

Material selection from a wide range of different alloys and characteristics for application dependent wear life, hardness, stability and toughness, e.g. 51Mn7mod., 75Cr1, 80CrV2, 73WCrMoV2-2, X155CrVMo12-1, S 6-5-2, BLECHER proprietary steel grades BL50, BL55 & BL60/BL80

100% Made in Germany

All materials used for BLECHER saw blades have been made in Germany

Individual tooth geometries

Tooth and cutting edge geometry optimized to each customer-specific application

Tempering with multiple annealing

Technically matured annealing processes with most advanced furnaces, for hardening and (where appropriate multiple) tempering

Cool Grinding

In-house developed “cool grinding” technology with most modern PLC controlled grinding machines reduce heat impact during processing and avoid unwanted residual stress

BLECHER flame hardening process

In-house developed flame hardening process anneals tooth tips to the highest possible hardness degree without embrittlement and by keeping the material´s toughness, tooth gullets remain without heat impact

Consistent documentation

Consistent documentation of all use materials, manufacturing steps and measuring results including from final inspection for each production job

Highest environmental standards

Technically matured annealing processes with most advanced furnaces, for hardening and (where appropriate multiple) tempering

BLECHER hammering process

A proprietary hammering and straightening process results in highest precision and smallest side run-out even across multiple service cycles

Thermal stress relieve

Blades are thermally stress relieved to eliminate uncontrollable and unwanted residual stresses from the material rolling process which potentially can create performance deviations during use

Thermochemical platings

Thermos-chemical platings and hard material coatings available for higher cutting speeds and reduced wear

Optimized tooth gullet radii

Milled teeth with consistent precision and tooth gullet radii optimized to virtually no cracking

BLECHER balancing process

Advanced balancing methods produce best possible true running results at high blade speeds for tools with non-parallel sides (hollow or bevel ground)

Controlled tensioning

Targeted, controlled, reproducible and application oriented blade tensioning guarantees straight cuts with no deviations even across numerous service cycles