Thread: Belt Tension

Hello Bob, these belts are covered by the ISO based Australian standard AS 2784. My copy is from 1985 and may have been updated by now. The important part however is that the belt you want is called a 'Z' section in the standard and some suppliers may use this term. The M & Z are identical, I do not know why the two terms have been used but the Japanese and probably others use the M.
The included angle of the belt is 40 degrees, the included angle of pulleys larger than 80mm pitch is 38 deg. and for pulleys smaller than 80mm the included angle is 34 deg.
The Standard also goes into belt tensioning and power transmission, if you need any more info please ask.
Regards, Mm.

All grinders I have been involved with which have multiple belts have to have matched sets. I had a car with twin belts which were sold as matched sets. I would imagine that the pulleys have to be in good condition for smooth operation.

We have 2 fridges at work that have "8 belt" sheaves, on them. One flaps everywhere and has a full load of belts. The other one is quite smooth but has less belts. Some time back I had a closer look and realised the one with less belts only had one belt. It was like 6 or so belts joined across the top.

The centrifuge has one 6 inch wide 1/8 inch thick kevlar belt. No adjustment at all. Around a tonne of stainless up to a metre diam at 4800 rpm. If the belt slips? They don't slip. I have one out in the shed from the last annual rebuild. Might fit it to my ride on mower.

Dean