Elastic ring for knob

What this small ring does

The elastic ring for the knob is a simple retaining component used to secure a control knob or button in place on a coffee machine. It sits behind or around the knob, providing the tension needed to hold it firmly against its mounting shaft or housing, keeping the control steady during everyday use.

Signs it needs replacing

Over time this ring can lose its elasticity, stretch out, crack, or snap due to repeated pressure and temperature changes near the machine. When this happens, the knob may feel loose, wobble, rotate freely without engaging properly, or even fall off entirely, making it difficult to operate the corresponding function reliably.

Choosing the right one

Since knob designs and retaining rings vary between coffee machine models, always check the compatibility table listed by the product to confirm it matches your specific knob and machine before ordering.

Compatible with

• M22
• M28-COMPACT
• M29-COMPACT
• M39GT
• M32-BISTRO
• M39-CLASSIC
• M39-DOSATRON
• ATHENA-S