Grizzly G9249 Lathe User Manual


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<.'). &'m(,7Zai9g^kZ<Ve7ZYAVi]Z
Spindle Speed
IdhZii]ZXdggZXihe^cYaZheZZY[dgndjgdeZgV"
i^dc! ndj l^aa cZZY id/ & 9ZiZgb^cZ i]Z he^cYaZ
heZZYcZZYZY[dgndjgldg`e^ZXZ!VcY'Xdc[^\"
jgZi]ZWZaihVcY\ZVgh[dgi]ZXVaXjaViZYhe^cYaZ
heZZY#
Calculating the Correct Spindle RPM
1. JhZi]ZiVWaZ^cFigure 48idYZiZgb^cZi]Z
gZXdbbZcYZYXjii^c\heZZY[dgi]Zldg`e^ZXZ
bViZg^Va#
Recommended Cutting Speeds
Ldg`BViZg^Va
BV\cZh^jb
6ajb^cjb
7gVhh7gdcoZ
8deeZg
8Vhi>gdcHd[i
8Vhi>gdc=VgY
B^aYHiZZa
8VhiHiZZa
IddaHiZZa
6aadnHiZZah=VgY
HiV^caZhhHiZZa
I^iVc^jb
=^BV\VcZhZHiZZa
6kZgV\ZIddaHeZZYh[b
Rough Cuts Finish Cuts
)%%
(*%
'*%
&%%
&%%
*%
&%%
,%
*%
*%
+%
.%
)%
-%%
,%%
*%%
'*%
'*%
&*%
'*%
&*%
&*%
&*%
&-%
'%%
&%%
Note: These values are based on HSS cutting
tools. For carbide cutting tools, double the aver-
age speed. These values are a guideline only.
Refer to the MACHINERY’S HANDBOOK for
more detailed information.
Figure 48.8jii^c\heZZYiVWaZ#
2. 9ZiZgb^cZ i]Z [^cVa Y^VbZiZg! ^c ^cX]Zh! [dg
i]ZXjindjVgZVWdjiidiV`Z#
Note: For this step, you will need to aver-
age out the diameters or work with the finish
diameter for your calculations.
3. JhZ i]Z [daadl^c\ [dgbjaV id YZiZgb^cZ i]Z
XdggZXihe^cYaZheZZYGEB[dgndjgdeZgV"
i^dc/
8jii^c\HeZZY;EBm&'
GZXdbbZcYZY
9^V#d[8ji^c^cX]Zhm(#&)
He^cYaZ
HeZZY
GEB
9djWaZ^[jh^c\XVgW^YZXjii^c\idda
2
Configuring the V-Belts and Back
Gear
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WnegdeZganedh^i^dc^c\i]Z bdidgK"WZai! he^cYaZ
K"WZai!VcYWVX`\ZVgh#
To configure the V-belts:
1. 9>H8DCC:8IA6I=:;GDBEDL:G
2. GZ[Zg id i]Z X]Vgi ^c Figure 49 VcY [^cY
i]Z kVajZXadhZhi idndjg XVaXjaViZYhe^cYaZ
heZZY#
Note: This chart is also on the front of the
headstock. The "Direct" speeds are with
the back gear disengaged. Instructions for
engaging the back gear are on Page 35.
6
&
' (
/min.
A
B
&'(
DIRECT
BACK GEAR
1200 900 655
550 410 300
220 165 120
100 75 50
7
B
Figure 49.He^cYaZheZZYXdc[^\jgVi^dcX]Vgi#
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