Description Details
Restore the perfect seal on your high-volume Mazzer Robur, Kony, or Major espresso grinder with the genuine Hopper Thumb Screw O-Ring (Part \# M28360016/OR). This essential OEM component is specifically designed to fit the thumb screw mechanism that secures the bean hopper to the grinder body, preventing common issues like **why is my Mazzer grinder leaking beans?** and ensuring the beans stay fresh and securely contained. Made from durable, high-grade rubberized material, this O-ring maintains elasticity and integrity even under continuous commercial use and exposure to friction and mild humidity, guaranteeing a reliable, airtight connection. A properly sealed hopper is critical for preventing moisture ingress, which can rapidly compromise the quality and flavor of your roasted coffee beans.
Don't let worn-out seals lead to inconsistent grinding or frustrating bean spillage. If you're experiencing **coffee bean spillage around Mazzer hopper** or noticing grounds contamination, replacing the O-ring (M28360016/OR) is the quick, definitive solution. Installation is straightforward: simply remove the old, hardened O-ring from the thumb screw groove and securely fit the new one. The benefit of this small but vital part is maximized performance and longevity of your expensive Mazzer equipment. This O-ring ensures that your hopper is vibration-dampened and firmly secured, eliminating potential rattling and maintaining the precise alignment needed for consistent dose delivery, which is key to answering **how to fix loose Mazzer grinder hopper**.
This product is an authentic Mazzer OEM replacement, guaranteeing a perfect fit for the Robur, Kony, and Major models. Specifications include precise inner and outer diameter measurements engineered for the specific thumb screw thread, and a material composition optimized for wear resistance in a high-demand commercial setting. Prevent the **Mazzer hopper thumb screw falling out** and ensure maximum grind consistency by maintaining these seals. Keep your Mazzer grinder operating at peak efficiency and protect your valuable coffee supply with this necessary maintenance item from Kaldi.com.
Frequently Asked Questions
Our current database shows fitment for the Robur series. However, many Mazzer components are interchangeable across different platforms. If you have successfully installed Part #M28360016/OR on a model we haven't listed, please let us know so we can update our records for the community.
If you are unsure of the fit, do not guess. To prevent downtime, please view our Compatible Parts Diagrams to check the exploded view PDF for your specific unit, or message our parts team for assistance.
Compatible Parts Diagrams*
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