IMET BS400/60 AFI-E, User Instructions, Page: 12 / 60

TRADUCTION OF THE ORIGINAL INSTRUCTIONS FOR USE
BS 400/60 AFI-Eing ED.2011 rev.00 11/60
In this paragraph we recommend the type of blade according to the material to cut. To get the best performance
from this machine it is necessary to understand how to use the tools and what you do not have to do with them. The
blade for this bandsaw must have the following size (mm) :
maximum length = 40300 minimum length = 40100 height = 34 thickness =1,1
The type of blade is also important, usually it’s a bi-metal blade with different HARDNESS,
named M42 or SVGLB (
for general purpose, tubes, profiles and solids, available in all pitch type), M51 or SHL (preferred for big
solids of hardening steel, INOX material too, available with 3/4 tooth pitch).
The durability of the teeth increases, and also the fragility, when going from the material M42 to M51.
To making a correct cut it’s essential to choose the pitch ( t ) or the number of the teeth per inch (z).
Usually the blade must have a pitch as follows :
- high pitch (small teeth), to cut thin materials, tubular and profiles.
- low pitch (big teeth), to cut solids or particular sections that require at times a big blade effort (for example, the
central part of a U profile), or softer materials as aluminium, copper, soft bronze.
By choosing the right one you can avoid a lot of working errors, get a good cut and the necessary room for the
chips.
If you cut more bars at the same time, you must consider them as a single bar and consider the total
size. The following table provide the information for a correct choice, it can also be updated or modified by the
user according to his personal experiences.
Even if blades with constant pitch are available, most bandsaws allow to use blades with variable pitch - groups of
teeth with different pitch between them - which reduce vibrations and noise, improving the quality of the cut and the
performance.
SUGGESTED PITCH SOLIDS
Outside
Diameter
(mm)
BIG
PROFILES
Wall
Thickness
(mm)
PROFILES
Wall Thickness
(mm)
BUNDLE
Length
to Cut
(mm)
REF.
VARIABLE
CONSTANT
14 M42 - - 1,5 max -
10/14 M42
10 M42 - - 1 a 2 -
8/12 M42
8 M42 20 max - 2 a 4 -
6/10 M42
6 M42 40 max - 4 a 8 -
5/8 or 5/7 M42 5 M42 30 a 80 6 a 12 - 50 a 100
4/6 M42
4 M42 40 a 90 10 a 20 - 70 a 120
3 / 4 M42 o M51
3 M42 o M51 70 a 150 15 a 25 - 100 a 200
2 / 3 M42 o M51
2 M42 o M51 120 a 230 Oltre 25 120 a 280