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Blade Terminology
HZaZXi^c\ i]Z g^\]i WaVYZ [dg i]Z Xji gZfj^gZh Vc
jcYZghiVcY^c\d[kVg^djhWaVYZX]VgVXiZg^hi^Xh#
Blade Terminology
A. Blade Size (Diameter): I]ZdkZgVaaY^VbZiZg
d[ i]Z WaVYZ# I]Z BdYZa <%+.' jhZh &)
WaVYZh#
B. Pitch:I]ZY^hiVcXZ[gdbi]Zi^ed[dcZiddi]
idi]Zi^ed[i]ZcZmi#Ine^XVaan\^kZc^cIZZi]
EZg>cX]IE>#
C. Gullet: I]Zh]VaadlVgZVWZilZZci]Zi^ehd[
i]ZiZZi]#
D. Front Rake Angle: I]ZbZVhjgZbZcid[i]Z
Vc\aZ [dgbZY WZilZZc i]Z i^e d[ i]Z WaVYZ
iddi] VcY Va^cZ iVc\Zci id i]Z eZg^bZiZgd[
i]ZWaVYZ#
E. Rear Rake Angle:I]ZbZVhjgZbZcid[i]Z
Vc\aZ [dgbZYWZilZZc i]Z [VXZd[ i]Z iddi]
VcYi]ZY^VbZiZg#
F. Tooth Depth: I]Z Y^hiVcXZ [gdb i]Z i^e d[
i]Ziddi]idi]ZWdiidbd[i]ZXdggZhedcY^c\
\jaaZi#
G. Kerf: I]Z l^Yi] d[ i]Z Xji XgZViZY Wn i]Z
WaVYZ#
Figure 13.7aVYZiZgb^cdad\n#
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C
D
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F
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Blade Pitch
I]Zbdhi^bedgiVciXdch^YZgVi^dcl]ZchZaZXi^c\
VWaVYZ^hWaVYZe^iX]!l]^X]^hine^XVaanbZVhjgZY
^c iZZi] eZg ^cX] IE># EgdeZg IE> [dg Vcn Xji
YZeZcYhdci]ZXgdhh"hZXi^dch^oZVcYlVaai]^X`"
cZhhd[i]Zldg`e^ZXZ#
>[i]ZWaVYZe^iX]^hiddXdVghZ[dgi]ZXji!i]ZgZ
l^aaWZidd[ZliZZi]bV`^c\i]ZXjiViVcn\^kZc
i^bZ#I]^hgZhjaih^cWgd`ZcWaVYZiZZi]VcYgdj\]
Xjih YjZ id ZmXZhh^kZ higV^c Veea^ZY id Wdi] i]Z
WaVYZ VcY i]Z ldg`e^ZXZ Figure 14#JhZV
WaVYZe^iX]i]Vi`ZZehViaZVhii]gZZiZZi]^ci]Z
ldg`e^ZXZViVcni^bZ#
8dckZghZan! ^[ i]Z WaVYZ e^iX] ^h idd [^cZ [dg i]Z
Xji!iZZi]l^aagZbV^c^ci]Zldg`e^ZXZVcYgZbdkZ
bdgZbViZg^Vai]Vci]ZWaVYZ\jaaZiXVc]daY#I]^h
Wj^aYje d[ X]^eh egZkZcih i]Z iZZi] [gdb Xjii^c\
Z[[ZXi^kZan VcY gZhjaih ^c eddg Xjii^c\ Z[[^X^Zc"
Xn! dkZg]ZVi^c\! VcY gVe^Y gdjcY^c\"d[[ d[ iZZi]
FIgure 15#
Figure 14. TPI too coarse for workpiece.
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Figure 15. TPI too fine for workpiece.
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