Manual change top jaws example JF Maprox

1. Loosen screws, remove jaws
2. Check the support of the other jaws for damage if necessary
3. Important!! Lightly oil the body with the multifunctional oil 5-56 + PTFE, so that the jaws run without inhibition. This is to ensure the smooth running of the chucks
4. Adjust the fit: Using a normal screwdriver, tighten the jaws a little more and then loosen them again approx. half a turn. This ensures a good fit of the base jaw and top jaw
5. Tighten the jaws to 8 Ncm (Newton centimetres) with the torque screwdriver
6. Eliminate backlash (tongue/groove): Depending on the type of jaw (internal or external clamping), use a suitable ring or shaft, preferably for a medium jaw level. Clamp well at least twice to eliminate the remaining play between the cheek piece and the base jaw (tongue and groove)

Manual service grease clean JF chuck maprox

1. Loosen jaws with a screwdriver and remove them
2. Clean: Spray Professional Degreaser onto a cloth and clean the chuck and jaws
3. Spray the grooves of the chuck body with multifunctional oil 5-56 + PTFE, as well as the surface of the chuck body, because:
   The chuck body forms the running surface for the JF attachment jaws!
4. Then reassemble the desired jaws - Attention: note numbering
5. Adjust the fit: Using a normal screwdriver, tighten the jaws a little tighter and then loosen them again by about half a turn. This ensures a good fit of the base jaw and top jaw.
6. Tighten the jaws to 8 Ncm (Newton centimeter) with the torque screwdriver
7. Eliminate backlash (tongue/groove): Depending on the type of jaw (internal or external clamping), use a suitable ring or shaft, preferably for a medium jaw level. Clamp well at least twice to eliminate the remaining play between the top jaw and the base jaw (tongue and groove)

Correct workpiece clamping

1. Pre-position jaws for clamping
2. Check workpiece and chuck for dirt, clean if necessary
3. Insert workpiece into chuck
4. Clamp the workpiece lightly so that it remains rotatable
5. Turn the workpiece several times in this position in both directions for approx. a quarter turn, preferably under light pressure downwards. This minimizes last soiling and surface unevenness and guarantees a good fit of the workpiece
6. Tighten well, depending on the workpiece take the dowel pin
7. When the jaws have been freshly changed, tighten them well twice