Grizzly G9249 - SETTING FEED RATE; Recommended Feed Rates

 

Setting Feed Rate


    Figure 52   Machinery's
Handbook
Note: These instructions are valid only for feed
rod power feed. Feed rate configuration for thread-
ing is discussed in the Threading subsection
starting on Page 40.
Recommended Feed Rates
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
Idda;ZZYGViZ>EG
Rough Cuts Finish Cuts
%#%&*¶%#%'*
%#%&*¶%#%'*
%#%&*¶%#%'*
%#%&%¶%#%'%
%#%&*¶%#%'*
%#%&%¶%#%'%
%#%&%¶%#%'%
%#%&%¶%#%'%
%#%&%¶%#%'%
%#%&%¶%#%'%
%#%&%¶%#%'%
%#%&%¶%#%'%
%#%&%¶%#%'%
%#%%*¶%#%&%
%#%%*¶%#%&%
%#%%(¶%#%&%
%#%%)¶%#%%-
%#%%*¶%#%&%
%#%%(¶%#%&%
%#%%(¶%#%&%
%#%%(¶%#%&%
%#%%(¶%#%&%
%#%%(¶%#%&%
%#%%(¶%#%&%
%#%%(¶%#%&%
%#%%(¶%#%&%
Note: These values are a guideline only. Refer
to the MACHINERY’S HANDBOOK for more
detailed information.
Figure 52.
To set the feed rate:
1.        
OFF  

2. 
    
Figure 53Change Gears Page
38
 Note: The Model G9249 ships with the
change gears in the 40T/127T/40T configu-
ration, which will cover most feed rates and
inch threading.
Figure 54.


3.   Figure 53 



 Note: This table is also on the bottom of the
label to the left of the feed rate selectors.
4.         
      
      
   
Figure 54
 Note: It may be necessary to jog the spindle
to facilitate movement of the selectors.
mm
120
127 40
40
127 40
120 120
32 32
30
127
1 4 6 1 6 1 4
A
B
C
D
E
METRIC THREAD TABLE
INCH THREAD TABLE
6 4.8 4 7.5 5 4.5
3 2.4 2 2.5 2.25 1.8
1.5 1.2 1 1.25 0.9
0.75 0.6 0.5 0.45
0.3 0.25
3.75
T.P.I.
127
32
30
A B
C
D E
127
32
46
1
3
/4
11
1
/2
3
3
/4 7
1
/2
23
15
46 92
30 60
FEEDING TABLE
mm
/inch
127
40
40
D
E
1 2 3 4 5 6 7 8
.42 .37 .35 .33 .30 .28 .26 .24
.0165 .0146 .0138 .0131 .0120 .0110 .0101 .0094
.210 .185 .175 .165 .150 .140 .130 .120
.0082 .0073 .0069 .0065 .0060 .0055 .0050 .0047
Figure 53.
 For Example: The operation is a shallow
finish cut on an aluminum workpiece. The
chart in Figure 52 recommends a feed rate
of 0.005–0.100 IPR (inches per revolution).
Because this is a shallow cut, we could select
a feed rate of 0.0082 IPR. To set this feed
rate, seat the left feed rate selector in the
"E" indent, and the right selector in the "1"
indent.