Φ35 is the shaft diameter of the servo motor, and the tolerance is (+0.01 to 0).
Therefore, the hole tolerance of the coupling is also adjusted accordingly.
Please note that even if Ball screw screw shaft diameter is Φ35, the hole diameter tolerance for both is the same.

• - The yield point of the mounting shaft material must be 343MPa {35kgf/mm ²} or higher (S45C equivalent or higher).
• - The surface roughness of the shaft must be Ra1.6 or less.

Figure 1

Figure 2

3. Tightening the pressure bolt

When tightening the pressure bolts, first pretighten them by hand, then gradually tighten the diagonal bolts (Fig. 3).

Finally, use a torque wrench to tighten to the specified torque of 16.7 N·m {1.70 kgf·m}.

At this time, place a dial gauge on the outer diameter of the body and tighten the pressure bolt so that the gauge runout is as close to 0 as possible (Fig. 2).

Additionally, if you insert a locking bar into the drilled holes on the outside of the body to secure it in place, the work will be easier (Figure 4).