Working Advice; Maintenance And Service - Bosch Professional GMA 55 Manual Original

6 | English
Product Features
The numbering of the components shown refers to the illus-
trations on the graphics pages at the beginning of the
manual.
(1) Screwdriver bit with securing ring
(2) Tool holder
(3) Depth stop
a)
(4) Screw belt
(5) Pin for screw length setting
(6) Thumbwheel for screw-in depth
(7) Scale for screw-in depth
a) Accessories shown or described are not included with the
product as standard. You can find the complete selection of
accessories in our accessories range.
Technical Data
Auto-feed attachment
Article number
Screw size
– Screw length
– Max. shank diameter
– Max. screw head diameter
Weight according to
EPTA-Procedure 01:2014
Assembly
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Remove the battery from the power tool before carry-
u
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Fitting the Auto-feed Attachment
Pull the standard depth stop off the drywall screwdriver if
one is fitted.
Pull the bit holder off towards you if one is fitted. An auxiliary
tool can be used to remove the bit or bit holder.
Insert a long screwdriver bit (1) into the tool holder (2) of
the drywall screwdriver.
Slide the auto-feed attachment over the screwdriver bit (1)
and onto the motor housing as far as it will go.
You can fit the auto-feed attachment offset in 45° incre-
ments. The auto-feed attachment cannot be rotated once it
has been fitted on the drywall screwdriver.
Inserting the Screw Belt (see figure A)
Only guide the screw belt (4) when the power tool is
u
switched off.
1 609 92A 6LF | (25.08.2021)
Slide the screw belt (4) through the belt guide until the first
screw sits one notch in front of the centre of the depth
stop (3).
Operation
Adjusting the Screw Length (see figure B)
The auto-feed attachment must be adjusted to the screw
length you are using. Press the pin (5). Slide the depth
stop (3) until the pin is moved to the starting position by the
spring force.
Adjusting the Screw-in Depth (see figure C)
Turning the thumbwheel (6) downwards increases the
screw-in depth; turning it upwards decreases the screw-in
depth. The selected screw-in depth is indicated by a symbol
on the scale (7).
The best way to determine the setting you require is to drive
GMA 55
in some test screws.
1 600 A02 8M2

Working Advice

mm 25−55
Check the rotational direction of the drywall screw-
u
mm 5
driver before beginning screwdriving work. The auto-
mm 9.5 feed attachment may only be operated in the "clock-
wise rotational direction" position.
kg 0.36
Always work at a right angle to the workpiece.
Switch on the drywall screwdriver and place the depth
stop (3) at the point where you want to insert screws. Press
against the workpiece surface using a consistent contact
pressure until the screw is inserted.
Briefly lifting the depth stop (3) away from the workpiece
moves the next screw into the working position.
Screws that have already been inserted cannot be loosened
or retightened using the auto-feed attachment. Use the dry-
wall screwdriver without the auto-feed attachment for such
cases.

Maintenance and Service

Maintenance and Cleaning
After-Sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessor-
ies.
Do not lubricate the auto-feed attachment
with oil or grease under any circumstances.
Bosch Power Tools