Blade.selection - Grizzly G9742 Owner's Manual

The.chart.below.is.a.basic.starting.point.for.choos-
ing.blade.type.based.on.teeth.per.inch.(TPI).for.
variable.tooth.pitch.blades.and.for.standard.raker.
type. bimetal. blades/HSS. blades.. However,. for.
exact. specifications. of. bandsaw. blades,. contact.
the.blade.manufacturer.
Here. are. some. general. rules. of. thumb. with.
respect.to.bandsaw.blade.use..
•. At. least. three. teeth. must. contact. the. metal.
at.any.phase.of.the.cut..Otherwise,.the.teeth.
can. load. up. with. metal,. fracture,. and. break.
off..If.the.TPI.is.too.high,.the.teeth.can.load.
up.with.material.and.overheat,.damaging.the.
blade.
•. For.a.faster.but.rougher.cut,.use.a.blade.with.
a.lower.TPI.and.a.higher.feed.rate.
•. For. a. slower. but. smoother. cut,. use. a. blade.
with.more.TPI.and.a.lower.feed.rate.
TOOTH SELECTION
mm
50 75
5/8
4/6
3/4
inch 2 2½ 3
CUTTING SPEED RATE RECOMMENDATION
Speed FPM
Material
(M/Min)
Carbon
196~354
Steel
(60) (108)
Angle 180~220
(54) (67)
Steel
180~220
Thin
(54) (67)
Tube
220~534
Aluminum
(67) (163)
Alloy
Copper 229~482
Alloy (70) (147)
-20-
Blade Selection
100 150 200
4/6 3/4
2/3
3/4
2/3
3½ 4 5 6 7 8 9
Speed FPM
Material
(M/Min)
203
Tool Steel
(62)
High-Speed 75~118
Tool Steel (25) (36)
Cold-Work 95~213
Tool Steel (29) (65)
203
Hot-Work
(62)
Tool Steel
203~213
Oil-Hardened
(62) (65)
Tool Steel
figure 21. Blade.selection.chart.
To select the correct blade TpI:
1.. Measure. the. material. thickness.. This. mea-
surement. is. the. length. of. cut. taken. from.
where.the.tooth.enters.the.workpiece,.sweeps.
through,.and.exits.the.workpiece..
2.. Refer.to.the."Material.Thickness".row.of.the.
blade.selection.chart.in figure 21,.and.read.
across. to. find. the. workpiece. thickness. you.
need.to.cut.
3.. Refer. to. the. "Shape". of. metal. and. "Material.
Type". columns,. and. find. the. shape. and.
material.to.be.cut..
4.. In.the.applicable.row,.read.across.to.the.right.
and.find.the.box.where.the.row.and.column.
intersect.. Listed. in. the. box. is. the. minimum.
TPI.recommended.for.the.variable.tooth.pitch.
blades,.and.the.TPI.for.bimetal.raker.blades.
in.parentheses..
250 300 350
1.4/2.5
1.4/2.5
10 11 12 13 14 15
Speed FPM
Material
(M/Min)
111~321 Free Machining
Alloy
(34) (98) Stainless Steel
Steel
246
Mold Steel
(75)
Water
242
Hardened
(75)
Tool Steel
85
Stainless
Steel (26)
85-203
CR Stainless
(26) (62)
Steel
G9742 Metal Cutting Bandsaw (Mfg. Since 11/06
400 450
2/3
1.5/.8
1.5/.8
16 17 18 19
Speed FPM
Material
(M/Min)
150~203
(46) (62)
108~225
Gray
(33) (75)
Cast Iron
Ductile
65~85
Austenitic
(20) (26)
Cast Iron
321
Malleable
(98)
Cast Iron
220
Plastics
(67)