Fein ASb 648 Operating Instructions

Operating instructions
for the Impact Wrench type ASb 648
and ASb 748 (42 Volts)
1. Technical data
Current:
~
(single phase A .C.)
For screws
Max.
ASb 648
To be handed to the workshop
Net weight
Type torque Square drive
Speed R.P.M. Taps Input
I
full load per min. Watts
I
from to kpm
I
Lbs. ft
ASb 648
M 12 (
1 /2")
M 22 ('/s")
40 289
ASb 748
2. Conne ction and operation
Main voltage must correspond to the operating voltage marked
on the rating plate.
To prevent the overbridging of the insulation no additional
marking plates and signs must be riveted or screwed on the
housing. We recommend the use of transfers only.
The machine is provided with a reversing switch for clockwise
and anticlockwise rotation. It must not be operated when the
machine is running.
The full tightening or slackening action provided depends on the
time during which the percussion mechanism is allowed to run .
Max. tightening torque is the sum of the torque applied by each
stroke. According to the type of screwed connection the max.
torque will be generally reached in 3 or 5 seconds .
The running-down torques may vary considerably with thread
friction, friction between bolt head and rest face, flexibility
("spring") in the parts to be joined, wear in the tool drives and
socket squares.
3. Maintenance and lubrication
Pull out plug before carrying out any maintenance work. Grease
once per week at the lubricating nipple (60) (when needed every
BE 349 e
EW 1. 73 Printed in German y
lbs . kg
lf/'
1500 1500 450 10,5 5
two days). After 300 working hours clean air openings of the
motor housing. Blow out motor with dry pneumatic air. Renew
the gear grease . Loosen screws (30) and take off gear h e ad.
Only use special gear grease Sst 1. Quantity of grease 50 g.
Order reference for the tube of approx. 90 g: MZ 60-3/ Sst 1.
After 900 working hours clean the machine thoroughly. Rinse
ball bearings and gearing in clean solvent and pack with fresh
grease (Sst 1) . The space between inner and outer rings is to be
one third filled with grease in order to prevent overheating of
the bearing.
Clean electric parts only dry.
Replace carbon brushes when they have worn down to 7 mm
(0.28 in.) . To replace brushes see paragraph 4. Only use Fein
carbon brushes. After fitting new brushes check that they move
easily in their holder. Run tool unloaded for about 15 min.
Check connection cable (43) at regular intervals. To replace it,
unscrew screws (51, 31), remove the handle upper part (46),
loosen the screws (50) of the clamping bridge and clamp off
cable from switch (47).
No claims can be entertained for damage due to negligent
maintenance and inadequate lubrication.