HOW TO ADJUST COFFEE ROASTING DRUM GAP

First of all, we must understand what the roasting drum gap is: It is the distance between the roasting drum and the front of the roasting machine.

Depending on the coffee roaster manufacturer, each brand’s roasting drum will be designed with different materials and thicknesses. However, the features and operating mechanism of the drum are the same. The expansion of the drum when frequently exposed to high temperatures, along with the rotating force of the drum over time, will create a gap between the roasting drum and the front of the drum that no roasting machine can avoid.

So why do we need to adjust the coffee roasting drum gap?

When should the drum gap be adjusted?

How much drum gao is reasonable?

How to adjust?

MARS ROASTER will share details so that users can understand and adjust directly on your roasting machine.

First, answer the question “why do we need to adjust the gap in the coffee roasting drum?”: If the gap is too large, it will cause the coffee to fall into the dust tray. If not fixed, it will cause a problem loss of coffee. At the same time, if not detected and cleaned regularly, it will clog the pipe leading to the dust box and cause a fire.

If the gap in the roasting drum is too small, then when the roaster operates, the expansion of the roasting drum when exposed to high temperatures, combined with the rotating motor of the drum, will create friction between the roasting drum and the front of the drum. . If not corrected promptly, it will affect the rotation speed of the drum, and over time will damage the structure of the roasting drum.

So when do we need to adjust the drum gap: when we see coffee beans falling into the dust tray, but not small beans (the drum gap is too large) or the sound of friction between two metals collide with each other (the drum gap is too small).

How to adjust the roasting drum gap properly: According to recommendations of coffee roasting machine manufacturing experts, The smaller of the gap the drum is the better. But without friction with the front of the roasting drum when rotating at high temperature. The reasonable gap of the roasting drum will be (0.5mm to 1.5mm).

The way to adjust the drum gap is very simple: we only need a specialized tool to open the drum, a hexagon set and a drum clearance gauge.

Step 1: We use a hexagon to open the bolts above the drum bearing.

Step 2: Use a specialized tool to rotate in the same clockwise direction if the gap of the roasting drum is too tight. On the contrary, if the gap of the drum is too large, we turn it back (counterclockwise).

Step 3: Use a tick to measure the clearance of the drum or a 1mm – 1.5mm hexagon and insert it into the gap of the drum to fit.

Things to note when adjusting the coffee roasting drum gap: You must stop the roaster and wait until it cools down. Or if you are in too much of a hurry to continue roasting the next batch, and can’t wait until the machine has cooled down, remember to wear specialized gloves (heat-insulated gloves) to perform the operations easily without causing burns.

For more details on how to adjust the gap of the coffee roasting drum, Customers can watch the video details at the link below or can contact Mars immediately.