Friction (Cold) Cutting Circular Saw Blades

Extra long blade life – with the least Tendency to Crack!

BLECHER friction saw blades cleanly and reliably cut hollow and structural sections made of Carbon steel in cold condition (<100°C). Longest blade life and best cutting performance are based upon highest quality and numerous particular processing methods. They are used for friction sawing with stationary and flying sawing plants at welded tube, hollow and structural section rolling mills, for parting gratings, fender walls and many more applications.

Tooth formsSaw blade materialTypical main dimensionsSawing machine:Finish of side faces

Tooth forms

  • 0° friction saw tooth for thin wall tubes and structural sections up to approx. 4 mm wall thickness
  • 30/30° pendulum shape for thicker walls with approx. 5 mm and above or solid items
  • 30/30° pendulum shape with flat land for older machines with low drive capacity,
  • Other tooth forms available on request, forged teeth for increased cutting clearance

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 material with alloy composition optimized for to the required life of the tool: For trough hardened blades with diameter up to 1500 mm used with flying saws:

1.2235 CV Chrome-Vanadium 80CrV2 = standard steel grade with good hardenability and for this reason good blade life

1.2604 70WM Tungsten-Molybdenum 73WCrMoV2-2 with considerably improved blade life (available up to max. diameter 1000 mm)

Typical main dimensions

Diameter mm Kerf mm Teeth Tooth Spacing mm
520 4 300 5,45
600 5 300 6,28
750 6 350 6,73
1000 8 350 8,98
1200 10 400 9,42
1500 10 470 10,00
1800 14 470 12,00
2000 14 524 12,00
2200 16 576 12,00
2500 16 654 12,00


Conditions of application:

  • vary with the machine used and workpieces to be cut
  • Cutting speed 110-150 m/s, Feed speed approx. 1000-2000 mm2/s
  • Cooling: As the friction saw melts the cut by means of friction heat, cooling before or during cutting must be the avoided.
  • High pressure water cooling after the cut substantially improves blade life.

Sawing machine:

Flying or stationary sawing machines made for example by Abbey Etna, Dreistern, Mannesmann, Otto Mills, MTM, Schloemann-Siemag, Siemens VAI, Danieli-Mogardshammar, TRM, Koch-HK, SMS-Meer, Trennjaeger, Wean United etc.

Finish of side faces:

  • hollow ground and off-set finish: side daces are hollow ground, optionally off-set ground and balanced after flat grinding; for maximum cutting clearance, reduce burr forming and high cut quality
  • flat ground finish: upon customer request side faces are just parallel ground


Single or multiple chrome plating optional for improvement of gilding properties and increase of surface hardness.

BLECHER QualitY Features

Application oriented selection of blade material

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