The J-Ultra manual coffee grinder from 1Zpresso is a model designed for preparing espresso . Each click moves the grinding stones by 0.008 mm, or 8 microns , offering the most precise adjustment of all 1Zpresso models.
The 1Zpresso J-Ultra grinder is equipped with 48 mm conical grinding stones. Two bearings ensure smooth grinding. The size of the grinding stones makes grinding very fast and smooth.
The grinding thickness adjustment is external . The grinding thickness is adjusted on the ring at the top of the grinder, without the need to disassemble the grinder. There are up to 100 levels of grinding thickness adjustment to choose from. One step is only 8 microns , so the grinding thickness adjustment is very precise.
Intended use: espresso. Number of steps (clicks): 100. Grinding stone material: titanium-coated steel. Step size (clicks): 8 microns.
Weight: 670g. Dimensions: 19 x 5.5 x 18.5 cm. Color: iron gray. Ground coffee capacity: 35-40g. Collection container: magnetic.
The 1Zpresso J-ultra grinder is made of durable materials. The grinder has an elegant rounded body with gently curved edges that provide a comfortable and ergonomic grip.
The capacity of the container is 35-40 grams , which is enough volume to grind several doses of coffee at once. The container can be easily attached to the coffee machine lever using the built-in magnet.

Package contents: 1Zpresso X-Ultra coffee grinder, cleaning brush, cleaning balloon, case.
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| 1Zpresso J-Ultra Manual Coffee Grinder - Instructions for use |
The 1Zpresso J-Ultra Iron Gray is a manual coffee grinder that has received rave reviews from customers around the world. Most reviews highlight its exceptional precision, quality workmanship and stylish design . Users appreciate the wide range of grinding coarseness settings (more than 400 positions, of which over 70 are for espresso only), which makes it ideal for various coffee preparation methods, but especially for espresso. It is also appreciated for its low retention , where the amount of ground coffee almost completely matches the amount weighed. Customers often compare this manual grinder with electric ones, often stating that the J-Ultra surpasses them in quality and consistency of grinding.
Many reviews mention the speed of grinding and ease of use , although some point out that grinding for espresso requires some effort. Other pluses include high-quality materials (stainless steel) , magnetic container attachment , and practical accessories, including a carrying case and cleaning kit.
Its reliability and consistent results make it a significant upgrade for home coffee sets , and many consider it the best manual grinder they've ever owned. Despite the higher price, customers agree that it's worth every penny .
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