Hilti SF4000-A, Operating Instructions Manual

Page: 12 / 17

6
7. Operation
Setting the depth gauge (screwdriving depth)

By adjusting the depth gauge, the screw can be driven
flush, beneath the surface or left projecting. Each incre-
ment is equal to an adjustment of ± 0.25 mm.
– Turn the depth gauge to the left
= The screw is driven deeper I.
– Turn the depth gauge to the right
= The screw is driven less deeply II.
Setting forward or reverse rotation
 
The direction of rotation of the driving spindle can be
selected by operating the forward / reverse push switch

. An interlock prevents operation of the switch while
the motor is running. When in the middle position, the
on / off switch is locked

.
– Push the forward / reverse switch to the right (tool in
the working position)
= reverse I.
– Push the forward / reverse switch to the left (tool in
the working position)
= forwards II.
Changing the bit

1. Grip the depth gauge and pull it forwards until the
snap-lock connection releases. The depth gauge can
then be pulled off towards the front end of the tool

.
2. Position the depth gauge on the worn bit

.
3. Pull the depth gauge upwards and pull out the bit
towards the front end of the tool

.
4. Insert a new bit.
5. Position the depth gauge on the tool and press it in
until it engages.
Changing the bit holder

1. Grip the depth gauge and pull it forwards until the
snap-lock connection releases. The depth gauge can
then be pulled off towards the front end of the tool

.
2. Grip the plastic part of the bit holder and pull it towards
the front end of the tool while pressing it away from
the gear housing

.
3. Insert a new bit holder.
4. Position the depth gauge on the tool and press it in
until it engages.
Switching on / off
1. Use the forward / reverse push switch to select the
direction of rotation.
2. The speed of the tool can be controlled smoothly
between zero and maximum by pressing the on / off
switch slowly.
Should the motor stall for longer than 2–3 seconds, the
tool must be switched off in order to avoid damage to
it.
Selecting sustained operation

The lockbutton for sustained operation can be used to
keep the motor running constantly at the optimal speed
with optimal motor cooling.
1. Press the on / off switch and hold it in the depressed
position.
2. Press the lockbutton.
3. Release the on / off switch.
4. Release the lockbutton.
Ending sustained operation

1. Press the on / off switch as far as it will go. The lock-
button returns to its original position, thus ending
sustained operation mode.
The interface between the tool and the depth gauge
1. Grip the depth gauge and pull it forwards until the
snap-lock connection releases. The depth gauge can
then be pulled off towards the front end of the tool

.
– The drive spindle is then exposed and the tool can
be used in reverse rotation for removing screws

I.
This also facilitates:
– changing the bit

or bit holder

,
– attaching the SMI55 magazine

II,
– re-tightening screws.
2. Position the depth gauge on the tool and press it in
until it engages. Take care when attaching the depth
gauge.
Belt hook
 
The belt hook can be used to attach the tool on a belt in
a position close to the body. To achieve the optimal posi-
tion, the belt hook must be pivoted 30° from the hori-
zontal position, in an upwards direction

.
1. Press the button I.
2. Pivot the belt hook through 30° from the horizontal
position, in an upwards direction, until it engages II.
The belt hook may also be fitted on the other side of the
tool for use by left-handed persons

.
1. Press the button I.
2. Pivot the belt hook through 70° from the horizontal
position, in a downwards direction I.
3. Pull the belt hook out of its guide.
4. Push the belt hook into the guide II on the other side
of the tool. The scaffolding hook must also lie against
the battery, so that the guide slots for the securing
pin in the motor housing and scaffolding hook are in
alignment III.
5. Pivot the belt hook back through 70° into the hori-
zontal position, until it engages III.
Make sure that the belt hook is securely fixed.
Scaffolding hook

The scaffolding hook provides a convenient means of
temporarily attaching the tool to objects at the work-
Printed: 07.07.2013 | Doc-Nr: PUB / 5070681 / 000 / 00