Product information
Bi-metal band saw blades

Why so successful?




M 42

material no. 1.3247
hardness approx. 67-69 HRC

M 51
material no. 1.3207
hardness approx. 69 HRC, with high tungsten and cobalt content


Flexible:
The blade backer of our Bi-Metal Band Saw Blade consists of a special alloyed spring steel. Highly flexible at a hardness of about 50 HRC. The ideal basis for long fatique life and excellent cutting performance.

Hard and wear resistant:
Tooth tips made of hardened HSS-Steel in M42 or M51 quality.

Perfectly joint:
Both materials are undetachably welded together.

All advantages:
The high quality Bi-Metal band combines the flexibility of the spring steel backing with the enormous wear resistance of high speed steel. Each tooth tip of the finished band is of hardened HSS-steel, extremely durable for best performance.

Terminology

b = width of blade
s = thickness of saw blade
h = gullet depth
t = tooth pitch
a = rake angle
y = clearance angle
w = width of set

The right tooth for the right performance

Only correct choice of tooth forms allows efficient cutting with low vibration. Four basic types are available:

0 degree - Standard tooth = N
Designed for:

- short chipping materials
- light wall thickness
Data:
- rake angle 0°
- 4 to 18 tpi
Article groups:
100, 110, 420
  

Positive - Hook tooth = H
Designed for:

- long chipping materials
Materials
- large cross sections
Data:
- positive rake angle
- 2 to 6 tpi
Article groups:
100, 110, 421, 426, 427
  

0 degree - Variable tooth = K-0
Designed for:

- low vibration cutting
- - structurals
Data:
- rake angle 0°
 - variable tooth pitch of 3/4 to 10/14 tpi
Article groups:
430
  

Positive - Variable tooth = K-POS
Designed for:

- low vibration cutting
- solid materials
Data:
- positive rake angle
- variable tooth pitch of 0,75/1,25 to 4/6 tpi
Article groups:
433, 442, 445 (K-V)
431, 436, 437 (K-Pos)
434, 438,  531, 537, 544 (K-PLUS)

Constant or variable?

Constant tooth pitch
The tooth distance is equally spaced. The number of teeth per inch (25,4 mm) denotes the tooth of the saw blade.   
   
Variable tooth pitch
The tooth distances vary within a group of teeth. The smallest and the largest tooth pitch denotes the variable tooth of saw blade.   

What groups and waves can cause.

Apart from tooth pitch and tooth form the exact set is essential for the performance of the sawblade. The correct clearance of back is achieved by the specific set for the cutting application. This is to avoid blade pinching, very important in problematic cutting jobs. Width and type of set are tuned to the cutting application:

Standard raker set
up to 10 tpi
tooth forms N, H

 

Variable group set
0.75/1.25 to 10/14 tpi
tooth form K

 

Wavy set
14 to 32 tpi
tooth form N

 

Correct tooth pitch – optimum performance.

The choice of the right tooth pitch can be decisive to achieve the optimum performance to cut the relevant cross section. Choose either Standard tooth with constant tooth pitch or Variable tooth with unevenly spaced teeth. It is advisable to use Variable tooth to cut problematic workpieces to reduce vibrations.

 

Recommendation for cutting solid material

Constant tooth pitch
Cross section Teeth per inch   
mm tpi Tooth shape
200 - 400 2 H
120 - 200 3 H
80 - 120 4 H/N
40 - 80 6 H/N
20 - 40 10 N
10 - 20 14 N
up to 10 18 N
N = Standard tooth
H = Hook tooth
Variable tooth pitch
Cross section        Teeth per inch
mm tpi Tooth shape
over 550 0.75/1.25 K
380 - 750 1/1.5 K
250 - 550 1.4/2 K
120 - 350 2/3 K
80 - 140 3/4 K
60 - 110 4/6 K
40 - 70 5/7 | 5/8 K
30 - 60 6/10 K
20 - 40 8/11 | 8/12 K
up to 25 10/14 K
K = Variable tooth

 

Recommendation for cutting tubes and structurals

The choice of the right tooth has special influence on the cutting result on tubes and structurals. Variable tooth has proven to be the most favourable tooth form. Tooth pitches selected are depending on wall thickness and outer dimensions of tubes or structurals. The recommendations shown here refer to single cuts. If two or more tubes or square pipes are cut at a time, double wall thickness to select tooth pitch.

Thin wall structurals (0° rake angle)
Wall thickness Diam. of structural (D) in mm
(S) in mm 20 40 60 80 100 120 150
2 14 14 14 14 14 14 10/14
3 14 14 14 14 10/14 10/14 8/11 | 8/12
4 14 14 10/14 10/14 8/11 | 8/12 8/11 | 8/12 6/10
5 14 10/14 10/14 8/11 | 8/12 8/11 | 8/12 6/10 6/10
6 14 10/14 8/11 | 8/12 8/11 | 8/12 6/10 6/10 5/7 | 5/8
8 14 8/11 | 8/12 6/10 6/10 5/7 | 5/8 5/7 | 5/8 5/7 | 5/8
10 - 6/10 6/10 5/7 | 5/8 5/7 | 5/8 5/7 | 5/8 -

 

Heavy wall structurals (positive rake angle)
Wall thickness Diam. of structural (D) in mm
(S) in mm 80 100 120 150 200 300 500 750
10 - - - 4/6 4/6 4/6 3/4 2/3
15 4/6 4/6 4/6 4/6 4/6 3/4 2/3 2/3
20 4/6 4/6 4/6 3/4 3/4 2/3 2/3 2/3
30 4/6 4/6 4/6 3/4 3/4 2/3 2/3 2/3
50 - - 3/4 3/4 2/3 2/3 2/3 1,4/2
80 - - - - 2/3 2/3 1,4/2 1,4/2
100 - - - - - 2/3 1,4/2 1,4/2

Bi-Metal and Carbide Tipped Band Saw Blade - For each cutting operation the right choice.

Endless or Coils

Available to fit your bandsaw machine, or in coils

ARNTZ Bi-metal band saw blades are supplied as endless welded loops suitable for your band sawmachine, or in coils:

  • 6 - 13 mm in coils approx. 30.5 + 76 m
  • 20 - 34 mm in coils approx. 100 m
  • 41 mm in coils approx. 80 m
  • 54 - 67 mm in coils approx. 90 m
  • 80 mm in coils approx. 50 m

Break-in procedures: For long blade life.

Like all HSS tools, ARNTZ Band Saw Blades should be subjected to a special break-in procedures for extended blade life, less blade changes and best payback of your tool cost.

Overload of the razor-sharp tooth tips should be avoided at the start of cutting operation. Aggressive cutting with a new blade will lead to premature tooth breakages. Correct break-in will control the gentle rounding of cutting edges.

Starting feed should be half of final feed rate at the recommended cutting speed for the first 300-500 cm² cut surface (see table on page 30). After that, feed rate should be gradually increased for maximum cutting rate. Should vibrations or noises occur at the beginning of the cutting operation, cutting speed should slightly be adjusted.

Only when the Band Saw Blades are cutting without any vibrations, cutting speed and feed can be increased step by step to the maximum. The Band Saw Blades are working perfectly when no vibrations will appear.

Technical recommendations

Material groups                                                        Material specification DIN Material no. Cutting speed
Vc (m/min)
Cooling fluids
  CS1/CS2-Plus Bi-Metal Cutting oil Emulsion
Structural steels St 37 – 2
St 50 – 2
St 60 – 2
1.0037
1.0050
1.0060
30-50
30-45
30-40
80-100
60-85
50-70
  x
x
x
Case-hardening steels C 10
14 NiCr 14
21 NiCrMo 2
16 MnCr 5
1.0301
1.5752
1.6523
1.7131
40-60
25-30
30-40
25-30
80-100
40-55
50-60
40-60
x
x
x
x
 
Free machining steels 9 S 20
45 S 20
1.0711
1.0727
40-60
40-60
80-120
80-120
  x
x
Heat treatable steels C 45
40 Mn 4
36 NiCr 6
34 CrNiMo 6
42 CrMo 4
1.0503
1.1157
1.5710
1.6582
1.7225
35-50
30-40
30-40
25-35
25-35
60-70
60-70
60-70
50-65
50-65
  x
x
x
x
x
Ball bearing steels 100  Cr 6
100 CrMn 6
1.3505
1.3520
20-30
20-30
35-50
35-50
  x
x
Spring steels 65 Si 7
50 CrV 4
1.5028
1.8159
25-35
25-35
45-60
45-60
  x
x
Unalloyed tool steels C 125 W C 75 W 1.1663
1.1750
20-30
20-30
40-60
40-60
  x
x
Cold-work tool steels 125  Cr 1
X 210  Cr 12
X 155 CrVMo 12 1
X 42 Cr 13
X 165  CrV 12
100 CrMo 5
X 32 CrMoV 3 3
45 WCrV 7
1.2002
1.2080
1.2379
1.2083
1.2201
1.2303
1.2365
1.2542
20-30
15-25
15-25
20-25
15-25
15-30
25-35
20-30
40-50
30-40
30-40
35-45
30-45
30-50
45-60
40-50
x
x
dry
x
x
x
x
x
x
x
x
x
x
x
x
Hot-work tool steels 56 NiCrMoV 7 1.2714 20-30 40-50 x x
High speed steels S 6-5-2-5  (E Mo5  Co5) S 2-10-1-8  (M 42)
S 6-5-2  (DMo5)
1.3243
1.3247
1.3343
20-30
20-30
20-30
35-45
35-45
35-45
  x
x
x
Vave steels X 45 CrSi 9 3
X 45 CrNiW 18 9
1.4718
1.4873
-
-
30-45
30-40
x
x
x
x
High temerature steels X 20 CrMoV 12 1
X 5 NiCrTi 26 15
1.4922
1.4980
-
-
10-30
10-30
x
x
x
x
Heat resistant steels X 10 CrSi 6
X 10 CrAl 18
X 15 CrNiSi 25 20
1.4712
1.4742
1.4841
-
-
-
15-25
15-25
15-25
x
x
x
x
x
x
Stainless steels X 5 CrNi 18 10 (V2A)
X 6 CrNiMoTi 172 12 2 (V4A)
1.4301
1.4571
-
-
30-40
30-40
x
x
x
x
Steal castings GS-38
GS-60
1.0420
1.0558
20-30
20-30
40-60
40-60
  x
x
Cast irons GG-15
GG-30
GGG-50
GTW-40
GTS-65
0.6015
0.6030
0.7050
1.8040
1.8165
25-30
25-30
25-30
25-30
25-30
30-60
30-60
30-60
30-60
30-60
dry
dry
dry
dry
dry
 
Copper KE-Cu
Elektrolyt-Copper
2.0050 100-250
100-250
100-400
100-400
x
x
x
x
Brass (copper-zinc alloys) CuZn 10
CuZn 31 Si 1
2.0230
2.0490
100-300
100-250
100-400
100-400
  x
x
Aluminium bronze (copper-aluminium alloys) CuAl 8
CuAl 10 Fe 3 Mn 2
2.0920
2.0936
20-30
20-30
35-50
35-50
  x
x
Bronze (copper-TIN alloys) CuSn 6
CuSn 6 Zn 6
2.1020
2.1080
80-100
80-100
80-150
80-150
  x
x
Red brass (copper-cast alloys) CuSn 10 Zn
CuSn 5 ZnPb
2.1086
2.1096
30-40
30-40
50-100
50-100
  x
x
Nickel base alloys NiCr 20 TiAl
NiCr 22 FeMo
2.4631
2.4972
-
-
10-25
10-25
x
x
x
x
Aluminium and aluminium alloys Al 99.5
AlMgSiPb
G-AlSi 5 Mg
3.0255
3.0615
3.2341
80-300
80-300
80-300
80-800
80-800
80-800
  x
x
x
Titanium and titanium alloys Ti Grade 1
TiAl 6 V 4
3.7025
3.7164
-
-
10-20
10-20
x
x
x
x
Thermoplatic plastics PVC
Teflon, Hostalen
  100-400
100-400
100-400
100-400
dry
dry
 
Plastics with fibre inlays Resitex
Novotex
  50-200
50-200
50-300
50-300
dry
dry
 

The following minimum order amounts apply for endless welded bi-metal and carbon steel band saw blades:

Carbon steel band saw blades   = 10 units per position
Bi-Metal band saw blades 6 – 27mm = 10 units per position
Bi-Metal band saw blades 34 – 41mm =   5 units per position


In addition the minimum order value is 150 Euros plus value added tax (sales tax). If the total invoice value is less than this amount we will add a minimum order surcharge of 15 Euros per order.
Sample band saw blades over a width of 20mm can also be delivered in smaller quantities.
Thank you for your consideration.