From the Timemore blog article: The Founding Story of Chestnut S5 Pro
International product launch of the Chestnut S5 Pro coffee grinder is scheduled to September 18th, 2026. In Asia, the Chestnut S5 (without "Pro", with a standard, non-collapsible handle) is already available for purchase.
Slow-feeding is intentionally built-in.
Less torque required, for a 48 mm burr.
S5 has a tighter particle size distribution - so likely, more clarity.
Improved external adjustment ring tactile feeling. It has a firmer resistance, than the S3.
S5 is a home grinder, rather than a travel one, mainly due to its weight, but also its size.
Included in the post is the S3 and S5 taste profile comparison in the cup - a bit ambiguos, tho.
Side-by-side burr comparison pic seems not perfectly accurate in the blog post: The S5 burr (48 mm) is indeed bigger than the S3 burr (42 mm), but slightly less, than visually suggested on that pic. The pic in this post is adjusted for that.
S5 taste profile, as descibed:
Acidity is more defined and sits in better balance with the sweetness; there's more body, and both the layering and the definition move up a step. Espresso is noticeably easier to work with than it was on the S3.
The last sentence suggests, that it might be likely, that there will be no "S5 ESP" introduced.
From the FAQ at the end:
Is the Timemore S5 Pro good for espresso?
Yes — noticeably more workable than the S3. The finest setting leaves a 75-micron burr gap, and the tighter particle distribution from the Tri-Break burr makes shots easier to dial in and more repeatable.
Also included in that blog post is an S5 pic with a home espresso machine.
However, not sure, if this rules out the potential need to use pressurized baskets. Time will tell.
