STAHLWILLE Standard Manoskop® 721 Service Manoskop® 730 List of contents Technical description .................. ã=Important safety points........... Operation .................................... Maintenance ............................... ® Cleaning the Manoskop ........... Accessories ................................ Disposal ......................................
• 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.
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 Manoskop ® 721/5 range [Nm] [ft.
ã Important safety points 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 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: ã C AUTI O N ! In order to ensure the cut-out is working accurately, it 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.
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.
Selecting the inserts and insert tools ã C AUTI O N ! 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 C AUTI O N ! Please use only insert tools made by STAHLWILLE.
ã C AUTI O N ! Use of home-made special tools may be dangerous. If you need to manufacture your own tools, please contact STAHLWILLE first. ã D ANG ER ! When using insert tools, ensure that the locking pin has located correctly. Otherwise, there is a danger of injury or damage. 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.
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.
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.
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.
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 cutout value.
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® 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. ã C AUTI O N ! Important! Never exceed a limit of 130% of the maximum scale reading.
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.
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.
ã C AUTI O N ! 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. 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.
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.
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 housing. 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.
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.
6. Finally, do a thorough test again. Proceed as described under „Checking the accuracy of the cut-out value“. ã C AUTI O N! Important! If you cannot compensate for the deviation within the prescribed tolerances using the method described here, it is likely that the cut-out mechanism is damaged. Such defects can only be repaired if the torque wrench is dismantled. Contact STAHLWILLE in such cases. 7. Replace the plastic handle or plugs as appropriate to protect the cut-out mechanism against dirt and damp.
Accessories For all models Inserts for square drives for all usual screw head types and sizes. For STAHLWILLE Service Manoskop® 730 Insert tools • • • • • • • ratchet insert tools square insert tools open-jaw insert tools ring insert tools Open ring insert tools Torx® insert tools Bit-holder insert tools For inspection and readjustment purposes • Mechanical torque testers • Electronic torque testers Services • repairs • testing and readjusting (incl.
