Mike

You are correct a training idler is slightly higher than the regular idlers to help in steering the belt. This is done to ensure load on the idler.

Gary Blenkhorn ■

Hello,

Increasing the roll height on self aligning idlers is a common practice in order to ensure that the idler is always in contact with the belt. There has also been work done on increasing the friction factor between roll and belt by rubber lagging steel rolls.

Regards,

Adi Frittella ■

Mike

A word of caution. Training idlers should never be installed in any part of a concave vertical curve section unless you can gaurantee contact with the rolls at all times.

Gary ■

Dear Mr. Mike,

If particular idler is taller than general belt line, then it will result into more load on that particular idler. So, such adjustment if any, should be done with caution.

Three mm that you are referring is not unusual misalignment value in vertical plane, as even general tolerance in a stinger stand framework would have tolerances in nearby range for average conveyors.

Regards,

Ishwar G Mulani.

Author of Book : Engineering Science and Application Design for Belt Conveyors.

Advisor / Consultant for Bulk Material Handling System & Issues.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916 ■

Dear Mr. Mike,

I have seen that there is difference of 5 to 10mm in elevation during erection of idler. So the height of training idler with respect to other is insignificant.

Regards.

A.Banerjee ■