MHW-3BOMBER Flash Tamper 51 mm – calibrated tamper for 51 mm machines
Compact 51 mm machines often come with a light, flat stock tamper – and that's exactly where a calibrated tamper makes a real difference. You press, hear the quiet click, and the puck is evenly compressed, every single time.
The 51 mm version of the Flash – for DeLonghi, Smeg, La Pavoni and other 51 mm portafilters.
Why an even tamp matters
During the shot, water finds the easiest path through the puck. If it's unevenly compressed, it flows faster where it's looser – the extraction becomes uneven. A consistent, evenly strong tamp is the foundation for that; on the small 51 mm baskets, a clean tamp stands out even more.
The Flash uses a three-spring system that holds a constant pressure of around 30 lbs, confirmed by a quiet click. A 15 lb spring is included for lighter pressure. The titanium base is sturdy, feels antistatic and holds back less grounds, and the handle combines wood and metal. Tamping is a craft, not a rule – the Flash just makes it more repeatable. Our opinion is one of many.
At a glance
| Type |
spring-loaded, calibrated tamper |
| Base diameter |
51 mm (for 51 mm portafilters) |
| Pressure |
constant around 30 lbs, with acoustic click |
| Springs |
three-spring system, additional 15 lb spring included |
| Base |
titanium, antistatic and sturdy |
| Handle |
wood and metal |
Who it's for
For anyone with a 51 mm machine like DeLonghi, Smeg or La Pavoni who wants to swap their stock tamper for a calibrated tool. The acoustic click makes the tamp even – without needing to keep the pressure in mind.
What pairs with it
An even tamp works together with the rest of your setup. You'll find tamping stations, Puck Screens and WDT tools affordably in the Normcore Collection and finished with extra care in the Weber Workshops Collection.
More tampers to compare are in our Tamper Collection. And since the best tamp only shows its worth with the right machine, it's worth a look at our espresso machines – supported by the advisory tool.
Frequently asked questions
Does the 51 mm tamper fit my machine?
It's made for common 51 mm portafilters, for example from DeLonghi, Smeg or La Pavoni. When in doubt, check the inner diameter of your basket.
Is a calibrated tamper worth it on a small machine too?
Especially there. Many 51 mm machines come with a light stock tamper; an even, calibrated tamp makes the shot noticeably more consistent.
Can I adjust the pressure?
Yes. Alongside the standard spring, a 15 lb spring is included if you prefer to work with lighter pressure.
Can I see the tamper in person before buying?
Very much so. In our showrooms in Bern (Gerberngasse 44) and Zurich (Hagenholzstrasse 50b) you can experience it live. Online we deliver in 2–4 business days, across Switzerland and to Liechtenstein.
Tip from our roastery
An even tamp shows itself especially with rich, sweet roasts. Our Cozy Chocolate and Nutty Delight taste well-rounded and forgive a lot. For maximum body without acidity, the Very Nutty, and for a fruity experience, the Wild Peach. That's our recommendation – one of many.
