Rancilio Rocky - MD40 - Obel Bregant Espresso Grinder Burrs common-universal-rancilio-parts/various-rancilio this is the one built

this is the one built for the job

however the best available Digital thermometers are built by Fluke and you can reference and purchase the different models available here

Faema and Futurmat E61

Coil: Parker ZB09

Rancilio Rocky - MD40 - Obel Bregant Espresso Grinder Burrs common-universal-rancilio-parts/various-rancilio this is the one builtRancilio Rocky MD 40 Espresso Grinder Burr Set 50mm flat burr set for the Rancilio Rocky, MD 40, and Obel Bregant grinders (Junior and Roma models only), stamped with the Rancilio symbol and "E. 22" for easy identification. SPECIFICATIONS 50mm outside diameter x 31mm inside diameter, 8mm thick, 3 fixing holes; sold as a kit of two identical burrs, Rancilio #69000032 COMPATIBILITY Fits: Rancilio Rocky, MD 40, and Obel Bregant grinders (Junior and Roma