Stahlwille Manoskop 721/5 User manual

27
STAHLWILLE
Standard Manoskop
®
721
Service Manoskop
®
730
Technical description
All models
Manoskop
®
721, 730 are adjustable
torque wrenches with a cut-out, tactile
and audible cut-out signals.
• These torque wrenches have a safety
cut-out mechanism.
• The wrench is set to cut-out at a
certain torque level by setting the
required value on the force-free
sliding scale.
• The setting slide has an automatic
setting fail-safe mechanism.
• The measuring element is a flexible
rod. The flexible rod is not
pretensioned so it is only under
tension from the start to the end of the
actual tightening operation until the
wrench cuts out.
List of contents
Technical description.................. 27
ã=Important safety points........... 30
Operation.................................... 32
Maintenance ............................... 42
Cleaning the Manoskop
®
........... 47
Accessories ................................ 48
Disposal...................................... 48

28
• As soon as the torque wrench is
released, it is ready for the next job.
• These wrenches will only tighten in
one direction. To use the wrench for
loosening, turn it over. Exception: The
Manoskop
®
721/5 and 721/15 cannot
be used for counter clockwise
tightening.
• If necessary, these torque wrenches
can be readjusted without
dismantling.
Maximum permissible deviation of the set
value from the absolute value at cut-out is
4%. Manoskop
®
721 and 730 comply with
DIN EN ISO 6789, Type II, Class A.
Every Manoskop® has a unique serial
number and is supplied with a works
calibration certificate.
Manoskop
®
721/5 and
721/15 ...
... have a permanent, switchable ratchet
with a permanent square drive (sizes are
shown in the Technical Specifications on
page 29). Controlled counter clockwise
tightening is not possible.
Standard Manoskop
®
721/30 ...
... has a permanent, switchable ratchet
with a push-through 12.5 (1/2") square
drive.

29
Service Manoskop
®
730/2 to
730/65 ...
... can be fitted with various insert tools.
For this purpose, the head of the wrench
has a recessed square drive at the face
(sizes are shown in the Technical
Specifications) with a double-sided
locating hole and insertion groove. The
insert tools can be attached in the
„normal“ position or rotated through 180°.
Controlled counter clockwise tightening is
also possible.
Table of technical
specifications
length to centre of square drive
Manoskop®721
721/5 721/15 721/30
range [Nm]
[ft.lb]
6–50
5–36
30–150
25–110
60–300
50–220
square drive shaft,
fixed
usable from both sides
10 (3/8'')
—
12.5 (1/2'')
—
—
12.5 (1/2'')
Length [mm] 338 415 530
weight [g] 915 1310 1710
Manoskop®730
range insert-
able
square
drive
Length Weight
Typ
[Nm] [ft lb] [in lb] [mm] [g]
730/2 4–20 — — 9 x 12 178.5 318
730a/2 — — 35–175 9 x 12 178.5 318
730/4 8–40 — — 9 x 12 222 398
730a/4 — — 70–350 9 x 12 222 398
730/5 6–50 5–36 — 9 x 12 315 800
730a/5 6–50 — 50–440 9 x 12 315 800
730/10 20–100 15–72.5 — 9 x 12 370 950
730a/10 20–100 — 180–880 9 x 12 370 950
730/12 25–130 20–95 — 14 x 18 410 1100
730a/12 25–130 — 225–1150 14 x 18 410 1100
730/20 40–200 30–145 — 14 x 18 455 1230
730a/20 40–200 — 350–1750 14 x 18 455 1230
730/40 80–400 60–300 — 14 x 18 590 1640
730/65 130–650 100–480 — 14 x 18 875 3400

30
Intended Purpose
Manoskop
®
721 and 730 have been
designed for controlled tightening of
screw joints in a workshop environment.
In order to loosen a nut or bolt during the
normal tightening process, the
Manoskop
®
can also be used in the
opposite direction. Manoskop
®
721 and
730 may only be used for these purposes.
To do so, the correct attachments must be
used with the torque wrench.
The „intended purpose“ includes full
adherence to the information contained in
this instruction booklet, in particular the
safety instructions and technical tolerance
limits. The buyer is required to ensure that
all users comply with these instructions.
Any use beyond the use described here is
in breach of the intended purpose.
The buyer and user are responsible for
any damage or injury resulting from non-
adherence to these instructions.
• Manoskop
®
721 and 730 have not
been designed for tightening of screw
joints under series production
conditions. This might lead to
inaccurate readings as a result of
inadvertent operation of the sliding
scale.
• The Manoskop
®
may not be used as
a hammer. This will lead to injury and
damage.
ã
Important safety
points

31
• The Manoskop
®
may not be used for
uncontrolled loosening of nuts & bolts
— for example rusty joints. This may
cause damage to the torque wrench.
Correct torque settings ...
... can be lifesaving in some applications.
For this reason, please note the following
points:
Unless internal regulations at the place of
use say otherwise (e.g. test equipment
inspection to ISO 9000 et seq.) inspection
should take place after approx. 5000 uses
or every 12 months, whichever is the
shorter.
If an inspection shows that there is
excessive deviation, the torque wrench
will have to be readjusted (see page 44).
Additional important safety
points ...
... may apply depending on the
application. These are found in the
appropriate sections marked with danger
symbols ã.
ã CAUTION !
In order to ensure the
cut-out is working
accurately, it should be
checked at regular
intervals.

32
Operation
Manoskop
®
721 and 730 are measuring
instruments and must be treated with
utmost care. Avoid subjecting the tool to
physical knocks, chemicals or excessive
temperatures beyond the limits given in
these instructions.
Please note that extremes of climate
(cold, heat, humidity) may affect
measuring accuracy.
Avoid overloading the tool by more than
30% of the maximum permissible load in
the direction of tightening or in the
opposite direction. The Manoskop
®
may
be damaged. After such an overload, the
readings may be inaccurate in such a way
that the user does not notice.

33
Selecting the inserts and
insert tools
These guarantee the correct lever length,
fit accurately in all situations and are
designed to have sufficient strength.
ã CAUTION !
When using inserts on
torque wrenches with a
square drive, ensure
they have been
manufactured to comply
with standards and are
the correct shape and
size for the nut or bolt to
be tightened.
STAHLWILLE inserts
guarantee the
connection will be a
good fit and that the
drive profile will fit
exactly.
ã CAUTION !
Please use only insert
tools made by
STAHLWILLE.
ã CAUTION !
Ensure the maximum
permissible load of the
insert or tool used is not
exceeded. This might be
lower than the maximum
cut-out torque of the
torque wrench.

34
Remember that the tool has to be of the
correct type and the right size for the
screw or bolt.
Attaching insert tools
721/5 and 721/15
1. For controlled clockwise tightening,
switch the ratchet to „R“ or, for
uncontrolled loosening of joints, to
„L“.
ã CAUTION !
Use of home-made
special tools may be
dangerous. If you need
to manufacture your own
tools, please contact
STAHLWILLE first.
ã DANGER !
When using insert tools,
ensure that the locking
pin has located correctly.
Otherwise, there is a
danger of injury or
damage.

35
2. Slide the insert over the square drive
of the ratchet until it locates.
721/30
1. Check that the square drive is fitted to
the right side of the torque wrench.
2. If not, push the square drive out
through the upper side to the right
side.
3. For controlled tightening, switch the
ratchet to „R“ or, for uncontrolled
loosening of joints, to „L“.
4. Slide the insert over the square drive
until it locates.

36
Attaching insert tools - 730/2
to 730/65
1. Insert the insert
tool into the
internal square
drive on the
face of the
head of the
wrench. The
spring-loaded
locking pin of the insert tool will be
pressed down by the insertion
groove. Slide the insert tool in until it
comes to the endstop. Ensure the
locking pin locates in the hole.
2. Check to see that the insert tool is
properly attached.
3. To tighten counter clockwise, turn the
insert tool through 180°before
attaching to the torque wrench.
4. If you are using
a ratchet insert
tool, set this to
the desired
direction by
turning the
control knob.
Removing insert tools
730/2 and 730/4
1. Insert a fine
punch into the
locating hole of
the shell tool
from outside.
Use the punch
to depress the
locking pin.
2. Remove the insert tool.

37
730/5 to 730/65
1. If the tool was attached in the
„normal“ position, press the release
button on the underside of the head of
the wrench. If the tool was attached to
the torque wrench rotated through
180°. Insert a fine punch into the
locating hole in the head of the
wrench. Use the punch to depress the
locking pin.
2. Extract the insert tool.
Setting the torque level
The torque level at which the wrench cuts
out is set by moving the scale against the
fixed mark. Always approach the desired
torque setting from a lower value.
Intermediate settings between two marks
on the scale can be estimated.
In order to be able to set the scale, the
setting fail-safe mechanism has to be
operated first. Once the setting fail-safe
mechanism is released, the value set is
automatically locked.

38
Proceed as follows:
1. Depress the button on the underside
of the tool, or the pressure plate in the
end of the handle as appropriate, to
release the setting fail-safe
mechanism.
2. Slide the scale to a torque level lower
than the desired cut-out value.
3. Now slide the scale to the desired cut-
out value.

39
4. Release the button / pressure plate.
The torque level is now set.
5. Check the value again. If the setting is
wrong, return to 1.
Controlled counter
clockwise tightening
For reasons of accuracy, these torque
wrenches have been designed to work in
only one direction. The direction is
marked with an arrow.
Controlled counter clockwise tightening is
possible by turning the Manoskop
®
over.
Exceptions: The Manoskop
®
721/5 and
721/15 cannot be used for counter
clockwise tightening.
For controlled counter clockwise
tightening using the Manoskop
®
721/30 in
the turned over position, the square drive
must first be pushed through to the upper
side.

40
For controlled counter clockwise
tightening using the Manoskop
®
730/2 to
730/65, the insert tool has to be rotated
through 180°. Ratchet insert tools also
need switching to „L“ (CCW) for the
correct tightening direction.
Uncontrolled loosening of
nuts & bolts ...
... opposite to the tightening direction is
possible. The cut-out mechanism is not
placed under load during this process.
Using the torque wrench
ã CAUTION !
Important! Never exceed
a limit of 130% of the
maximum scale reading.
Do not use the tool for
loosening rusty nuts and
bolts. This may cause
damage to the torque
wrench. After such an
overload, the readings
may be inaccurate in
such a way that the user
does not notice.
ã DANGER !
Before you use the
wrench, check that the
cut-out value is set to
the correct level and that
the insert tool is firmly in
place. Apply the tool in
such a way that it cannot
slip off the nut or bolt.
Otherwise, there is a
danger of injury or
damage.

41
Only apply force to the Manoskop
®
via its
handle. Hold the handle in the middle.
Apply force at a tangent to the swivel
radius and at right angles to the axis of the
nut or bolt.
Pull steadily and without any interruption,
particularly during the final phase, until
you feel a jerk and hear a click. The torque
level set on the scale has now been
reached.
As soon as the torque wrench has cut out,
it is ready for the next job
ã CAUTION !
Important! Once the
wrench has cut out,
never apply more
pressure! You should
therefore not pull too
fast in case you cannot
stop the motion quickly
enough when you hear
the click.

42
Maintenance
The internal mechanisms of the torque
wrench are subject to normal wear and
tear under operating conditions. For this
reason, the accuracy of the cut-out should
be checked at regular intervals.
Unless internal regulations at the place of
use say otherwise (e.g. test equipment
inspection to ISO 9000 et seq.) inspection
should take place after approx. 5000 uses
or every 12 months, whichever is the
shorter.
If inspection shows that there is a
deviation, the torque wrench must be
adjusted.
The inspection and adjustment must be
carried out in accordance with
DIN EN ISO 6789.
Checking the accuracy of
the cut-out value
A torque tester is necessary for the
inspection with sufficient capacity for the
wrench to be tested and with a
guaranteed accuracy of ± 1% of the
displayed reading.
If you have access to such a tester, you
may inspect the Manoskop
®
yourself.
Suitable torque testers are available from
STAHLWILLE. It is also possible for
STAHLWILLE to test the Manoskop
®
for
you.
To carry out the test, proceed as follows:
1. Set the torque wrench to the highest
scale reading
2. Operate the torque wrench five times
ensuring it cuts out properly each time

43
3. Set the torque wrench to 20% of the
maximum scale reading.
4. Operate the torque wrench five times
on the torque tester. Check o see that
the readings shown on the torque
tester are not more than 4.15%
greater and not more than 3.85%
smaller than the value set on the
torque wrench.
5. Set the torque wrench to 60% of the
maximum scale reading.
6. Operate the torque wrench five times
on the torque tester. Check to see
that the readings shown on the torque
tester are not more than 4.15%
greater and not more than 3.85%
smaller than the value set on the
torque wrench.
ã CAUTION !
Important note on the
accuracy of the
readings: Once the
wrench has cut out,
never apply more
pressure! You should
therefore not pull too
fast in case you cannot
stop the motion quickly
enough when you hear
the click.

44
7. Set the torque wrench to the highest
scale reading.
8. At this setting, operate the torque
wrench five times on the torque
tester. Check to see that the readings
shown on the torque tester are not
more than 4.15% greater and not
more than 3.85% smaller than the
value set on the torque wrench.
If the tests show that there are deviations
greater than the permitted amounts, the
wrench will require readjusting.
Adjusting for deviations in
cut-out value
You may return your torque wrench to
STAHLWILLE for adjustment. You will
then receive the tool back with a new
works calibration certificate.
You may adjust the torque wrench
yourself. In this case, however,
STAHLWILLE‘s accuracy guarantee is
void.
A torque tester is necessary for the
inspection with sufficient capacity for the
wrench to be tested and with a
guaranteed accuracy of ± 1% of the
displayed reading.

45
Every Manoskop
®
has two adjusting
screws inside for readjustment purposes.
These are accessible with an Allen key,
size 2 mm, through two holes in the hou-
sing.
The screw which is closest to the end of
the handle is primarily for adjusting the
lower end of the scale range.
The screw which is closest to the head is
primarily for adjusting the upper end of the
scale range.
Each screw has a minor effect on the
adjusting range of the other screw.
To protect the mechanisms from dirt,
these two holes are plugged. The
Manoskop
®
730/2 and 730/4 have the
holes under the removable plastic cover
for protection.
To adjust the wrench, you will need the
torque tester and an Allen key, size 2 mm.

46
Proceed as follows:
1. With the Manoskop
®
730/2 and
730/4, remove the plastic cover first.
With other models, remove the two plugs
using a sharp object. Retain the plugs for
later use.
2. To adjust the lower end of the range,
insert the Allen key in the hole nearer
to the handle. To adjust the lower end
of the range, insert the Allen key in
the other hole.
3. Turn the Allen key with great care and
very slowly. Turning in a clockwise
direction increases the cut-out torque
level, turning in the other direction
decreases it. The screws will lock in
any position.
4. Once you have made an adjustment
using one screw, check the effect by
testing the cut-out value on the torque
tester.
5. Repeat the adjustment of one or both
screws and the testing process until
the deviation has been compensated.