technical data Synchronous Belts and Belt Sprockets
Instructions for use (Lock Belt Sprockets C type)
Instructions for use
Installation
- 1) If there is any dirt or grime on the shaft surface, wipe it off with a cloth. If there is any dirt or grime on the contact surfaces of the pulley hub and clamp collar, wipe it off as well.
- 2) A solid lubricant has been applied to the bearing surface and thread surface of the tightening bolt, so do not wipe it off or apply oil or grease.
- 3) For pulleys with four slits in the hub, set the clamp collar so that the slits are in approximately the same position as the slits on the collar.
- 4) After confirming the positioning, tighten the left and right bolts alternately to about half the standard tightening torque (bolt tightening torque M A shown in the table below). When tightening, visually adjust the widths S 1 and S 2 of the left and right collar slits so that they are approximately uniform.
- 5) Tighten the left and right bolts alternately with the correct tightening torque M A. When the bolts no longer turn, the installation is complete.
Installation precautions
- - Always use a torque wrench to tighten the clamping bolts. Observe the tightening instructions and tightening torque M A. Using anything other than a torque wrench or tightening by hand will result in inaccuracy and may cause accidents such as slippage or deformation.
- - Tightening bolts to a torque greater than the specified torque can cause the bolts to break. Tightening bolts to a torque less than the specified torque can cause the bolts to loosen. Always tighten bolts to the specified torque MA.
- ・Never use any tightening bolts other than those provided with this product. This may result in damage to the bolts or other accidents. If you need new bolts due to loss or replacement, please contact us.
- - Shaft diameter tolerance and surface roughness: The shaft diameter tolerance should be h8 and the shaft surface roughness should be Ra 3.2.
Table 1 Bolt tightening torque list
| Clamp collar frame number | Bolt size | Bolt tightening torque M A | |
|---|---|---|---|
| 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 making sure that no torque, thrust, or other loads are being applied to the pulley and shaft, loosen and remove the bolts on both sides.
