teeth hardened

teeth hardened
Bandsaw Blade Selection Guide
RA
DI
US
1. Determine Blade Length
Refer to your manual for a specified length.
or
Stretch out an existing blade and measure it.
or
Set the wheels to the centre of the adjusting bolt
and measure length ‘C’ and the radius of the wheel:
C
1/2"
(2 x C) + (2 x RADIUS x 3.14) = BLADE LENGTH
or
Measure circumference of one wheel:
3/8"
1/4"
CIRCUMFERENCE + (2 x C) = BLADE LENGTH
Note: For 3 wheel hobby machines the easiest way
is to run a tape or string around the wheels.
2. Choosing Blade Width
3/16"
1/8"
BLADE WIDTH
1/2"
3/8"
Contour Cutting - The blade width is determined
by the smallest corner or radius that will be cut.
1/4"
3/16"
1/8"
CUTTING RADIUS 1/8"
3/8"
5/8"
1 1/4"
2 1/2"
Straight Cutting - For maximum cutting strength
use the widest blade the guides will allow.
Tooth Pitches Available
TEETH PER INCH
WIDTH
2
3
4
6
8
10
14
18
1/16"
24
32
3. Tooth Pitch or Teeth per Inch
Choose the number of teeth per inch (TPI) or the tooth
pitch based on speed of the cut, thickness and hardness
of the material and how wet or dry your wood is.
1/8"
3/16"
1/4"
3/8"
Fewer TPI
1/2"
5/8"
3/4"
1"
1 1/4"
Please see ‘Millband’ section on flap
2"
Available sizes include:
3/4, 2, 3, 4, 6 or 10 Teeth per Inch or
3/4", 1/2", 1/3", 1/4", 1/6", 1/10" Tooth Pitch
More TPI
faster cutting
thicker materials
softer materials
wetter woods
smoother cutting
thinner materials
harder materials
drier woods
INCORRECT
NOT ENOUGH TPI
CORRECT
4. Tooth Sets
Raker Set: Every third tooth (the raker tooth) is
straight for chip removal. Allows for clean contour
and is available in all tooth styles.
Alternate Set: No raker tooth allows for more
teeth cutting. This is an aggressive blade that cuts
fast; used when clogging is not a problem.
RAKER
ALTERNATE
Other set designs are used only in metal cutting.
5. Tooth Styles
Regular Tooth: A general purpose
blade for straight or contour cutting
of uniform size material; available
in raker, wavy or alternate set.
Skip Tooth: The shallow flat gullet
allows for good chip removal and
reduces the tendency to clog. Excellent
for soft, gummy materials, green wood,
paper board and fiberous woods.
Hook Tooth: Similar applications as
the Skip Tooth but with a 10° hook
for faster, more aggressive cutting. This
offers reduced feed pressure and higher
production rates.
6. Thickness of Blade
BC
Bandsaw
Blades Blades
come income
varying
NAPSaw
GLADU
Bandsaw
in varying
thicknesses of material:
.014 and .020 (28g and 25g) This material is for
small wheeled (e.g. portables) and three wheeled
machines where the higher degree of flexing can
cause blade breakage in the heavier materials.
.032 (21g) Primarily used only in 3/4" material
but also available in 3/8" and 1/2" for extra
strength in production contour cutting. Not
recommended for blades lengths under 14 feet.
.025 (23g) This is the most common thickness
used in blade widths from 1/16" to 1/2".
.035 (20g) This is the standard thickness of carbon
steel blades from 1" to 2" wide.
7. Blade Speeds
8. Specify Material
General Guidelines:
Thick Material: Slower Speed
Hard Material: Slower Speed
Fine Tooth Pitch: Slower Speed
Thin Material:
Soft Material:
Few TPI:
Faster Speed
Faster Speed
Faster Speed
Surface Feet per Minute (SFM)
Maximum: 5000 SFM e.g. thin wood, paper,
asbestos, soft plastics
Minimum: 1500 SFM
e.g. bakelite
BC
Bandsaw Blades:
recommended
NAPCarbonsteel
GLADU Carbonsteel
Bandsaw
Blades:
for
wood and plastic
cutting.
A flexible
bodyAand
recommended
for wood
and plastic
cutting.
flexible
teeth
offer extended
body hardened
and teeththrough
hardenedtempering
through tempering
offer blade
life
and the
ability
withstand
higher
blade speeds.
extended
blade
life to
and
the ability
to withstand
higher blade speeds.
BC Premium or Tempered Back Blades: also
available,
but due
to the high
blade speeds
used
in
NAP GLADU
Premium
or Tempered
Back
Blades:
wood
and plastic
theyhigh
are blade
only recommended
also available,
butcutting,
due to the
speeds used in
in
unusual
circumstances.
wood
and plastic
cutting, they are only recommended
in unusual circumstances.
Carbide Tipped Blades: available for difficult cutting,
such
as very
hard Blades:
abrasiveavailable
plastics or
woods.
Carbide
Tipped
forexotic
difficult
cutting,
such as very hard abrasive plastics or exotic woods.
There are dozens of variables, but by using this guide,
your experience and, whenever required, your BC Saw
Representative, the best speed for your operator and
material can easily be determined.
Ready to Order?
Fill
Fill in
in the
the worksheet
worksheet below
below and
and then
then call
call aa NAP
BC
GLADU
Saw Representative
Representative
to request
to request
youryour
blade.
blade.
Need
Need
some some
extra extra
help? help?
There’s
There’s
alwaysalways
someone
someone
here here
to
to answer
answer any
any remaining
remaining questions
questions you
you may
may
have.
have. More
More information
information on
on our
our specialty
specialty blades
blades
can
can be
be found
found on
on the
the other
other side
side of
of this
this flap.
flap.
Call: 416-251-2236
Fax: 416-251-7268
Bandsaw Blade Order Sheet
Blade Length (2 x C) + (2 x RADIUS x 3.14) = BLADE LENGTH • • •
Blade Width
2" 1 1/4"
Teeth per Inch 3/4
1/2"
2
Tooth Sets RAKER
3
1/4"
4
3/16" 1/8" 1/16"
6
10 • • •
ALTERNATE • • • • • • • • • •
Tooth Style REGULAR
Blade Thickness .014
3/8"
SKIP
.020
HOOK • • • • • • • •
.025
.032
.035 • • • • •
Blade Material CARBONSTEEL TEMPERED CARBIDE SPECIALTY (see flap)
Blade Speed MINIMUM: 1500
MAXIMUM: 5000 • • • • • •
Visit our website: www.bcsaw.com
Specialty Blades
Millband
Tooth Pitches Available
WIDTH
Designed specifically for horizontal band mills and
vertical resawing applications. A flexible core with
heat treated hardened teeth guarantees maximum
blade life. This blade is also available with a hardened
back for less flexibility in high production ripping
or tough cross cutting.
Knife Band Blades
THICKNESS
TOOTH SPACING
1"
.035
1/2"
1"
.035
3/4"
1"
.042
3/4"
1 1/4"
.035
3/4"
1 1/4"
.035
1"
1 1/4"
.042
3/4"
1 1/4"
.042
7/8"
1 1/4"
.042
1"
2"
.035
3/4"
2"
.035
1"
Knife Edge and scalloped knife edge blades are available in 1/2" - 3" widths for meat, foam,
rubber, fabric and various other applications.
Kron Pallet Blade
Available in 1 1/4" wide, .042" thick, and 5/8" VariPitch, and welded to your specific length. The Kron
Pallet Bandsaw Blades are designed exclusively for
dismantling pallets. Kron, from NAP GLADU.
is a Bimetal Band with a revolutionary new tooth
design that will out-perform any pallet wrecking
blade on the market.
KRON
Bimetal Bandsaw Blades
Super hardened M2 and M42 teeth for shop and production applications. Designed to
cut most ferrous metals, all grades of steel, as well as titanium, copper and nickel alloys.
When referring to the chart please keep in mind that variable pitch (VP) refers to a band
with a tooth pattern in which every inch has a different number of teeth i.e. 5/8" VP has
five teeth in the first inch and eight in the next inch. These variable pitch bandsaws work
well in tubing and sheet metal.
Tooth Pitch and Variable Pitches Available
VARIABLE PITCH
TEETH PER INCH
WIDTH
1/4"
3/8"
1/2"
5/8"
3/4"
1"
1 1/4"
1 1/2"
3
4
6
8
10
14
18
24
3/4
4/6
5/8
6/10 8/12 10/14 14/18
General Information
Trouble Shooting
Guide Setting and Tracking
Should you experience:
blades breaking
premature dulling
teeth breaking
blades cracking
slow cutting
rough cutting
blades twisting
burning
blades running off
unsatisfactory performance
First: Review this guide and check:
blade tension (refer to your manual)
guide settings (see section on guides)
feed pressure – don’t force or under feed
After every blade change:
Then ask yourself:
• Is the blade gauge correct? (see thickness section)
• Are the wheels cleaned and properly aligned?
• Are the rubbers worn?
• Are you using the correct number of teeth and
tooth style?
• Is the blade too dull or plugging?
• Is the blade speed correct?
• Is the width of the blade correct for the contour
you are cutting?
• Are you using properly welded quality blades
as referred to in the guide?
• Are the teeth running backwards?
Bandsaw Terminology
Pitch - the distance between two teeth (point to point)
TPI - teeth per inch
Gauge - blade thickness
Set - the bending of the tooth-tip which provides the
cutting action and the blade clearance
Adjust the top and bottom guides (with the machine
turned off ) so that:
• the thrust bearing is 1/64" behind the back of the
blade; the blade should touch the bearing as soon
as any feed pressure is applied
• the side blocks are within the thickness of a piece
of paper from the side of the blade – but not
touching – and just back of the tooth gullet
• the guides should be just above the work piece
Free-Wheel the blade (machine still off ) to check:
• wheel alignment
• tension
• tracking – in the middle of the wheel RIGHT
• guide and bearing settings
Replace worn out:
• thrust bearings (also replace if sticky)
• guides
• wheel rubbers
Points to Ponder
Bi-Metal - a blade specifically designed for metal cutting
relief or clearance - the back slope of the the tooth
HOOK OR
RAKE
PITCH
BACK RELIEF
OR CLEARANCE
GULLET
SFM - surface feet per minute or the speed that the
blade travels at
Feed Speed - the speed at which the material is fed
through the blade
Kerf - total thickness of the blade at tooth tips which
equals the minimum width of cut
WRONG
• When in doubt use the next finest tooth pitch
• Don’t put the blade in the cut before the blade starts
• Let the blade cut – too much or too little feed pressure
shortens blade life
• Powdery chips indicate the blade and/or the speed is
wrong for the material being cut
• Always free-wheel a new blade to check tracking and
guide settings before turning it on
• Keep this for referral, but don’t hesitate to call your
NAP GLADU Representative for assistance
Raker - the straight tooth that ‘rakes’ the chips out
of the cut
Flex Back - carbon steel blades that have hardened
teeth and back
RIGHT
WRONG
WIDTH
BACK
THICKNESS
OR GAUGE
KERF
SET
USA 812.482.2000 • FAX 800.385.6049 • 800.634.8665 CANADA 450.460.4481 • FAX 450.460.2655 • 800.363.9117
www.napgladu.com © Copyright August, 2014 NAP GLADU All Rights Reserved Issue Date: 09/2014
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