background image

 

Relationship between Torque and Torque Scale. 

    *Reference Value 
 
 
 
 

 

 

 

 

 

 

Adjust the bit torque by changing the driving-in length of the torque adjustment ring at the end. 

  The  relationship  between  torque  scale  and  torque  is  as  shown  right,  in the  torque  diagram.  The 

figures  of  torque  scale  do  not  in  dictate  bit  torque  values.  However,  the  clamping  torque  of  screw 

itself is different from type, size, material of the screw and the material of its mating part. Use it as 

a standard to obtain an appropriate clamping torque. 

  The [Return torque method] in which once-clamped screw is returned with torque wrench or the 

like is available as one of torque control methods. However, note that the measured values by the 

return torque method generally appear in 10% - 30% lower than the actually clamping torque. 

  The  torque  checker  measures  the  torque  of  screwdriver.  The  clamping  torque  of  screw  itself  is 

different from the clamped conditions. Understand the correlation between clamping torque values 

and the torque checker values to perform the torque control properly. 

 

      CAUTION

 

 

Also in  reverse  rotation,  the  clutch  is  turned off in  such  manner  as  in  normal  rotation,  stopping 

the motor running. 

  Accordingly, when returning the screw tightened at a large torque, set it to a higher torque scale. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T

or

q

u

[N

m

Torque Scale 

DLV7331 

DLV7321 

Summary of Contents for Delvo DLC1213-LUB

Page 1: ...L Electric Screwdriver Models Screwdriver Controller DLV7321 BKU DLC1213 LUB DLV7331 BKU Manufactured by NITTO KOHKI CO LTD 2 9 4 Nakaikegami Ohta ku Tokyo 146 8555 Japan Tel 03 3755 1111 Fax 03 3753...

Page 2: ...h if not avoided by following the instructions given could result in injury or material damage Please note however that failure to observe safety precautions under the Caution category could result in...

Page 3: ...efficient work use the proper bit and check it regularly Check the cable regularly Contact sales agents to repair it when it is defective When an extension cable is used check regularly and change it...

Page 4: ...eing used move the changeover switch to the O Off position and unplug the screwdriver 12 Do not overload to the extent that the motor locks or the clutch malfunctions May cause smoke fire failure or i...

Page 5: ...serve as an antistatic one It has the same output torque and free speed as the standard type WARNING Pay attention that an abnormal voltage or anything abnormal is not generated in the ground or you...

Page 6: ...ped screw is returned with torque wrench or the like is available as one of torque control methods However note that the measured values by the return torque method generally appear in 10 30 lower tha...

Page 7: ...ion Screwdriver DLV7300 Series Changeover Switch Torque Adjustment Ring Power Cord 3m Controller DLC1213 LUB Speed adjustment volume Soft start adjustment volume Receptacle Power switch Start Switch P...

Page 8: ...s off immediately and the motor stops at the same time Return the trigger to the original position 4 Unscrewing Turn the changeover switch to reverse and trigger the switch 4 Use the screwdrivers in c...

Page 9: ...d Cam guide balls 6 Cam guide 7 Spindle bearing Brush assembly If the remainder length of the brush reaches 3mm change it for the new brush When you return the brush again after having checked it do n...

Page 10: ...switch set to or Set the changeover switch at or 2 Output torque is low Is the output torque correctly set Check it by Torque Checker 3 The screwdriver is overheating abnormally How much time is OFF t...

Page 11: ...11 Notes...

Page 12: ...12 Manufactured by NITTO KOHKI CO LTD 2 9 4 Nakaikegami Ohta ku Tokyo 146 8555 Japan Tel 03 3755 1111 Fax 03 3753 8791...

Reviews: