How to adjust coffee roaster drum rotate speed?

As Mr. Scott Rao wrote in his book COFFEE ROASTING BEST PRACTICES , give us clear data about coffee roaster drum speed RPM.

thanks a lot~

According to our actual roasting experience, it is same.

but there are many different brands coffee roasters around the world, before you purchase it, you need to know how to control it.

Example here is our 2kg coffee roaster, model TY-2, it is small enough to put on table, place in your coffee shop, batch capacity 0.5-2.5kg, roasting time is about 8-12min per batch.

here below is our coffee roaster drum speed controller, it's easy to adjust the drum speed to the value you need, max is 80RPM enough for all of the capacity coffee roasters.

The proper drum rotating speed is necessary for evenly mixing the coffee beans, reducing the Burnt spot, and ensuring adequate convective heat transfer during coffee roasting. Please adjust the drum speed according to the actual situation.