Bosch PS130 Instrucciones De Funcionamiento Y Seguridad página 13

2610056735 02-21 PS130_BM 2610015935 02-12.qxp 2/15/21 10:23 AM Page 13
You will extend the life of your bits and do
neater work if you always put the bit in
contact with the work before pulling the
trigger. During the oper a tion, hold the tool
firmly and exert light, steady pressure. Too
much pressure at low speed will stall the
tool. Too little pressure will keep the bit
from cutting and cause excess friction by
sliding over the surface. This can be
damaging to both tool and bit.
DRILLING WITH VARIABLE SPEED
The variable speed trigger allows you to
slowly increase RPM. By using a slow
starting speed, you are able to keep the bit
from "wander ing". You can increase the
speed as the bit "bites" into the work by
squeezing the trigger.
DRIVING WITH VARIABLE SPEED
Variable speed drills will double as a power
screwdriver by using a screwdriver bit in the
drill mode. The technique is to start slowly,
increasing the speed as the screw runs
down. Set the screw snug ly by slowing to a
stop. Prior to driving screws, pilot and
clearance holes should be drilled.
FASTENING WITH SCREWS
This procedure shown in (Fig. 11) will
enable you to fasten ma terials together with
your Cordless Drill/Screwdriver without
stripping, splitting or separating the
material.
First, clamp the pieces together and drill the
first hole 2/3 the diam eter of the screw. If
DRILL BITS
Always inspect drill bits for excessive wear.
Use only bits that are sharp and in good
condition.
TWIST BITS: Available with straight and
reduced shanks for wood and light duty metal
drilling. High speed bits cut faster and last
longer on hard ma terials.
CARBIDE TIPPED BITS: Used for drilling stone,
con crete, plaster, cement and other unusually
hard nonmetals. Use continuous heavy feed
pres sure when employing carbide tip bits.
DRILLING WOOD
Be certain workpiece is clamped or anchored
firm ly. Always apply pressure in a straight line
with the drill bit. Maintain enough pressure to
keep the drill "biting".
Operating Tips
the material is soft, drill only 2/3 the proper
length. If it is hard, drill the entire length.
Second, unclamp the pieces and drill the
second hole the same diameter as the screw
shank in the first or top piece of wood.
Third, if flat head screw is used, countersink
the hole to make the screw flush with the
surface. Then, simply apply even pressure
when driving the screw. The screw shank
clearance hole in the first piece allows the
screw head to pull the pieces tightly
together.
The adjustable screw drill accessory will do
all of these oper ations quickly and easily.
Screw drills are available for screw sizes No.
6, 8, 10 and 12.
FASTENING
WITH SCREWS
1. Drill 2/3 diameter and
2/3 of screw length for
soft materials, full
length for hard
materials.
Screw
When drilling holes in wood, twist bits can be
used. Twist bits may overheat unless pulled
out frequently to clear chips from flutes.
Use a "back-up" block of wood for work that
is likely to splinter, such as thin materials.
You will drill a cleaner hole if you ease up on
the pressure just before the bit breaks
through the wood. Then complete the hole
from the back side.
There are two rules for drilling hard materials.
First, the harder the material, the greater the
pres sure you need to apply to the tool.
Second, the harder the material, the slower
the speed. Here are a couple of tips for drilling
in metal. Lubri cate the tip of the bit
occasionally with cutting oil except when
drilling soft metals such as alu minum, cop per
-13-
2. Drill same
diameter as
screw shank.
3. Countersink
same diameter
as screw head.
Apply a slight
even pressure
when driving
screws.
FIG. 11
DRILLING METAL
Adjustable
Screw
Drill