Does your vibration sound funny? Have you checked your sheaves lately?

Worn out sheaves may result in block that have hair line cracks, inconsistent heights and/or poor compaction.

Some concrete products producers are still using the 7-3/4" O.D. sheaves on vibrator motors. Measure your sheave to make sure that you are using the 8-1/4""O.D. sheaves, part number 113068. The 8-1/4" O.D. sheaves will allow your vibrator to operate at 2800 rpm's or higher. This higher rpm is more effective on machines with standard one-speed vibration.

For producers with a 50 Hertz concrete products machine make sure you are using the 249.9 mm O.D. sheave, part number 113069, to reach the 2800 rpm level.

For Vibrapac and Bescopac concrete products machines:

Part No. 113068 – 8-1/4" O.D. sheave
Part No. 113069 – 249.9 mm O.D. sheave

Smoother vibration starts/stops will occur if the belt on your Besser concrete products machine slip upon starting/stopping the machine.

We recommend that you do not use cogged, powered or banded belts on your Besser concrete products machines because these belts do not slip. The torque is so great on this type of motor that when these non-slipping belts are used these motors tend to raise up and down which causes the mold to jump. This results in poor product quality and premature mold wear when the belts start and stop.

To ensure even vibration, make sure that all belts are working properly. Note: Belts tend to wear quicker and vibration may be uneven if you are using less than the recommended amount (one belt per groove).

Only Besser approved belts should be used on Besser concrete products machines.

Part No. 082002

For proper weight and balance, the center line of the motor sheave should be approximately 1-1/2" above the center line of the vibrator sheave.

Posted 28 August 2000