Grizzly G9742 - Manual (Page 22)

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G9742 Metal Cutting Bandsaw (Mfg. Since 11/06
Blade Selection
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.
Copper
Alloy
229~482
(70) (147)
203~213
(62) (65)
85-203
(26) (62)
220
(67)
220~534
(67) (163)
203
(62)
85
(26)
321
(98)
180~220
(54) (67)
95~213
(29) (65)
242
(75)
65~85
(20) (26)
180~220
(54) (67)
75~118
(25) (36)
246
(75)
108~225
(33) (75)
196~354
(60) (108)
203
(62)
111~321
(34) (98)
150~203
(46) (62)
Aluminum
Alloy
Thin
Tube
Angle
Steel
Carbon
Steel
Speed FPM
(M/Min)
Speed FPM
(M/Min)
Speed FPM
(M/Min)
Speed FPM
(M/Min)
Material
TOOTH SELECTION
CUTTING SPEED RATE RECOMMENDATION
Material Material Material
Tool Steel
Mold Steel
High-Speed
Tool Steel
Alloy
Steel
Water
Hardened
Tool Steel
Stainless
Steel
CR Stainless
Steel
Free Machining
Stainless Steel
Gray
Cast Iron
Ductile
Austenitic
Cast Iron
Malleable
Cast Iron
Plastics
Cold-Work
Tool Steel
Hot-Work
Tool Steel
Oil-Hardened
Tool Steel
50
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2½ 3½
75 100 150 200 250 300 350 400
2/3
2/3
2/3 1.4/2.5
1.4/2.5
1.5/.8
1.5/.8
3/4
3/4
3/4
4/6
4/6
5/8
450 mm
inch
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..