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Tip
#54
MARK V Introduction
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Speeds
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Figure
1-33.
The speed dial is letter calibrated through an rpm range
of 700 to 5200. Caution: Turn the dial only when the
motor is running. When an operation is complete, always
turn the dial to 'Slow' before shutting off the Mark
V.
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The Mark
V is equipped with a speed dial that is calibrated by letter
through variable speed ranges (Figure
1-33). Correct speeds are important for safety and good
craftsmanship. The speed setting is determined by the operation
being performed and the material being processed. Speed dial
settings for particular operations are given throughout the
text. When there is doubt about what speed to use, start with
a slow speed and increase it slowly to the point where the
operation is going smoothly. The main and upper auxiliary
spindles turn from 700 RPM to 5200 RPM. The lower auxiliary
spindle turns 1.6 times faster than the other two, or between
1120RPM and 8320 RPM.
The Mark
V speed dial settings with the RPM in parentheses that are
given throughout the text are for 60 hz operations only. Most
owners have the 60 hz machines. If you have a 50 hz machine,
use Table 1-ito convert the RPM for 60 hz operations to the
proper speed dial settings for 50 hz operations.
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Table
1-1: Speed Dial Conversion Chart for 50 hz Operations
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RPM
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Speed
Dial Setting
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585
625
710
790
875
960
1080
1210
1335
1460
1580
1710
1835
2000
2170
2330
2500
2710
2915
3165
3415
3665
3915
4250
4335
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Slow
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
Fast
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| NOTE:
To determine the speed dial setting for 50 hz operations
find the RPM closest to but not exceeding the RPM recommended
in the text. Set the speed dial to the letter given.
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Back to
Introduction
Back to General Safety Rules for Power
Tools
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