Technical Data  Synchronous Belts / Belt Sprockets  Handling

Handling instructions (Lock Belt Sprockets C Type)

Handling instructions

Mounting

  • 1)If there is any dust or dirt on the shaft surface, wipe clean with a cloth. If there is also any dust or dirt on the belt sprocket hub or clamp collar, wipe clean.
  • 2)Because a solid lubricant is applied to the seat and thread surfaces of the locking bolts in advance, do not wipe it off or apply oil or grease.
  • 3)For belt sprocket with four slits in the hub section, place the clamp collar in such a way that its slits come to almost the same position as the slits of the collar.
  • 4)After confirming the position, tighten the right and left bolts at a torque that is half of the tightening torque (the bolt tightening torque MA shown in the table below) alternately. In doing so, tighten them while making an adjustment visually so that the widths S1 and S2 of the right and left collar slits become almost equal.
  • 5)Tighten the right and left bolts at the normal tightening torque MA. When the bolts rotate no more, the installation is completed.
Mounting

Precautions for installation

  • ・Be sure to use a torque wrench when tightening the locking bolts. Observe the tightening procedure and the tightening torque MA when tightening them. Using any wrench other than a torque wrench and tightening manually are not recommended, which could result in an accident, such as slippage and deformation.
  • ・Locking the bolts at a torque higher than the tightening torque could result in breakage of the bolts. In addition, locking the bolts at a torque lower could cause loosening of the bolts. Therefore, be sure to tighten at the appropriate tightening torque MA.
  • ・Never use bolts other than those provided with this product as tightening bolts. Otherwise, bolts may damage and cause accidents. Contact us if you need a new bolt due to lost or replacement.
  • ・Shaft diameter tolerance and surface roughness ：The shaft diameter tolerance and shaft surface roughness shall be h8 and Ra 3.2, respectively.

Table 1  Bolt tightening torque list

Clamp collar frame number Bolt size Bolt tightening torque MA
C1, C2 M4 3.8N・m 0.39kgf・m
C3, C4, C5 M5 7.5N・m 0.77kgf・m
C6 M6 12.6N・m 1.3kgf・m

Removal

After confirming that no load, such as torque and thrust, is applied to the belt sprocket and shaft, loosen the right and left bolts sequentially to remove them.