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Summary Manual
Mark V Model 520
Safety
WARNING
Before performing lathe turning operations:
• Read the SAFETY section, especially for the
lathe mode.
• Complete ALL the Assembly and Alignment
procedures.
• Secure locks.
Lathe Turning Speeds
NOTE
The speeds in the speed chart are only suggested
speeds.
Before you begin any lathe turning operation,
know the correct speed at which to set the speed
dial. The speed is determined by the operation
and the type of material you’re turning. To deter-
mine the speed for the job, refer to the Lathe
Turning Speed Chart.
Turning Know-How
Spindle Turning
This type of turning is done with stock mounted
between the drive and cup centers.
Faceplate Turning
This type of turning is done with stock mounted
to a faceplate.
Scraping
This technique uses the cutting edge of the tool to
scrape the stock. See Figure C-39. Position the
tool rest just below the axis of rotation of the stock
so the chisel cuts on center. Slowly feed the chisel
toward the stock. The chisel should point directly
at the center of the stock.
Shearing
This technique uses the cutting edge of the tool to
pare away the stock. See Figure C-40. Position the
tool rest 1/4"-1/2" below the top of the stock, and
feed the chisel at an angle.
Lathe Tools
Gouges round the stock and make coves;
roundnose chisels make coves; skew chisels make
beads and cut cylinders; parting tools size and
part.
Balance
1. This is extremely important when turning
glued-up stock, long stock and stock more
than 3" in diameter. Check the balance of your
spindle and faceplate stock after you’ve
marked the centers.
2. To do this, drive a standard 8-penny nail
straight into each center. Use suitable string to
hang the stock in a level position from the
front bench tube of the Mark V or a saw horse.
The ends of the string should be looped around
the nails. Gravity will pull the heavy side
down. Use a jointer, bandsaw or hand plane to
remove no more than 1/32" at a time from the
heavy side until the stock remains stationary
when rotated to three positions 90 degrees
apart.
Figure C-40
Figure C-39
Scraping
Shearing
Lathe Turning Operations
LATHE TURNING SPEED CHART
Size of Stock
Rounding
Shaping
Sanding
Up to 2" dia
C (950 rpm)
F (1300 rpm)
K (2050 rpm)
2" to 4"dia
B (850 rpm)
E (1150 rpm)
J (1900 rpm)
4" to 6"dia
A (750 rpm)
D (1050 rpm)
H (1600 rpm)
Over 6"dia*
Slow (750 rpm)
A (750 rpm)
B (850 rpm)
* Large heavy stock requires slower speeds.