EINHELL TC-BD 350 Original Operating Instructions page 33

The various spindle speeds can be set by moving
the V-belt.
Proceed as follows:
•
Remove the screw (16) in order to open the
V-belt cover (7).
•
Slacken the tightening screw (15) and push
the motor (8) in the direction of the machine
head.
•
Move the V-belt to the desired position.
•
Refer to table (Fig. 6) for the recommended
speeds.
•
Tighten the V-belt by pushing the motor (8)
away from the drill head (6). Screw the tighte-
ning screw (16) back down again. The tension
is properly set when the V-belt flexes in the
middle by approx. 1 cm when pressed.
•
Close the V-belt cover and screw down using
the screw (16). The V-belt cover (7) must
always be locked tight, as the equipment is
equipped with a safety switch that only allows
the equipment to be turned when the V-belt
cover (7) is closed.
Danger! Never let the pillar drill run when the V-
belt cover is open. Always pull power plug before
opening the cover. Never touch the V-belt when it
is rotating.
6.4.1 Drill depth stop (Fig. 8)
The drill depth can be set exactly by means of the
depth stop (14) and a scale (a) on the front side
of the machine head. The equipment must be
switched off in order to set the depth stop.
•
Insert the required bit (6.2) and turn the set-
ting screws up.
•
Using the handle, move the bit so that its tip
just touches the surface of the workpiece and
read the value indicated on the scale.
•
Remove the workpiece.
•
Add the required drill depth to the value you
read off the scale and use the handle to lower
the bit until the value you calculated is indica-
ted on the scale.
•
Turn down the lower setting screw as far as it
will go.
•
Secure the setting by turning the upper set-
ting screw against the lower setting screw.
Danger! When setting the drill depth of a cylindri-
cal hole you must add the length of the drill tip.
6.5 Setting the angle of the drill table (Fig. 5)
•
Slacken the carriage bolt (26) under the drill
table (4).
•
Set the drill table (4) to the desired angle.
Anl_SA_TC_BD_350_SPK8.indb 33 Anl_SA_TC_BD_350_SPK8.indb 33
GB
•
Tighten down the carriage bolt (26) in order to
lock the drill table (4) into this position.
6.6 Setting the height of the drill table (Fig. 1)
•
Slacken the tightening screw (5).
•
Set the drill table (4) to the desired height by
pressing down or lifting up and simultaneous-
ly (gently) pushing to the left or right.
•
Screw the tightening screw (5) back down
again.
6.7 Clamping the workpiece
As a general rule, use a machine vice or another
suitable clamping device to lock a workpiece into
position. Never hold the workpiece in place
with your hand! When drilling, the workpiece
should be able to travel on the drill table (4) for
self-centering purposes. Ensure that the workpie-
ce cannot rotate. This is best achieved by placing
the workpiece/machine vice on a sturdy block.
Danger! Sheetmetal parts must be clamped in to
prevent them from being torn up. Properly set the
height and angle of the drill table for each workpi-
ece. There must be enough distance between the
upper edge of the workpiece and tip of the drill bit.
6.8 Working speeds
Ensure that you drill at the proper speed. Drill
speed is dependent on the diameter of the drill bit
and the material it is made from.
The table below acts as a guide for selecting
the proper speed for drill bits made from various
materials.
Note: The rotational speeds shown are me-
rely suggested values.
Drill bit Ø Cast iron Steel
3 2550 1600
4 1900 1200
5 1530 955
6 1270 800
7 1090 680
8 960 600
9 850 530
10 765 480
11 700 435
12 640 400
13 590 370
14 545 340
16 480 300
18 425 265
20 380 240
22 350 220
25 305 190
- 33 -
Iron Aluminum Bronze
2230 9500 8000
1680 7200 6000
1340 5700 4800
1100 4800 4000
960 4100 3400
840 3600 3000
740 3200 2650
670 2860 2400
610 2600 2170
560 2400 2000
515 2200 1840
480 2000 1700
420 1800 1500
370 1600 1300
335 1400 1200
305 1300 1100
270 1150 950
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