Mark V 520
Summary Manual
SM - 29
Figure C-35
Safety
WARNING
Before performing horizontal boring operations:
• Read the SAFETY section, especially for the
horizontal boring mode.
• Complete ALL the Assembly and Alignment
procedures.
• Set up the horizontal boring mode according to
the instructions found in your Mark V Model's
section.
• Remove the key from the chuck.
• Secure locks.
Horizontal Boring Speeds
Before you begin any horizontal boring opera-
tion, know the correct speed at which to set the
speed dial. The correct speed is determined by the
operation and the type of material you’re boring.
To determine the right speed for the job, refer to
the Horizontal Boring Speed Chart.
General Boring
There are two basic types of holes: holes that you
bore through the stock, and holes that only go
part way through the stock.
Boring Through
1. Mount the rip fence on the table to use as a
backstop.
2. Clamp a scrap of wood on the fence to keep
the bit from boring into the fence and the stock
from splintering where the bit exits. This scrap
should be taller than the fence.
3. Mark the holes on the stock, and lay it against
the scrap. Make fine adjustments with the
table height crank. See Figure C-34.
HORIZONTAL BORING SPEED CHART
HORIZONTAL BORING SPEED CHART
HORIZONTAL BORING SPEED CHART
HORIZONTAL BORING SPEED CHART
HORIZONTAL BORING SPEED CHART
Size of Hole
Hardwood
Softwood
1/4" and less
H
(1600 rpm)
I
(1750 rpm)
1/4" to 1/2"
F
(1300 rpm)
G
(1450 rpm)
1/2" to 3/4"
D
(1050 rpm)
E
(1150 rpm)
3/4" to 1"
B
(850 rpm)
C
(950 rpm)
Over 1"
Slow
(700 rpm)
A
(750 rpm)
Horizontal Boring Operations
Figure C-34
4. Extend the quill so that the cutting flutes of the
bit touch the scrap wood. Set the depth control
to 1/8" beyond and tighten the depth control
lock. Then let the quill retract. Position the
stock in front of the bit and hold it against the
table and rip fence. Extend the quill with the
machine off to check where the bit will drill.
5. Turn on the Mark V, set the speed, and feed
the bit into the stock, see figure C-35. When
boring deep holes, it will be necessary to re-
tract the bit now and then to clear chips from
the hole. When you feel the depth control stop
the quill, retract the bit. Set the speed dial to
"Slow" and turn off the machine. Let it come to
a stop, then remove the stock.
Boring Part Way
1. This operation is similar to boring through,
except you should extend the quill until the
cutting flutes of the bit just touch the stock.
Then set the depth control and lock it. The
depth control will stop the quill when the bit
reaches the proper depth.
2. All the holes you bore at any one depth con-
trol setting will be exactly the same depth.
When you need to bore a number of holes all
at the same height, hold the stock down with
equal pressure at each hole.
Boring metals (twist drill bits only) — Slow (700 rpm)