MHW-3BOMBER Yu Series Impact Tamper 58.35 mm – an even tamp with automatic reset
You place your palm on the round head and press down. The springs inside give way, an audible signal tells you the tamp is done, and as soon as you let go, the tamper resets itself. A calm, always identical movement, shot after shot.
The Impact Tamper from the Yu Series by MHW-3BOMBER has a 58.35 mm base for 58 mm portafilters. It is made of SUS304 stainless steel, aluminium alloy and silicone and weighs about 450 g. You can buy it from us in Switzerland, with Click and Collect in Bern and Zurich.
Features
Inside, four springs work together. According to MHW-3BOMBER, they keep the tamping pressure constant, prevent the tamper from tilting and make it stable in the hand. The base stays level, so the coffee bed is compressed evenly every time.
Impact tamping
As you press, the spring is compressed and released again. When the pressure reaches a preset value, the base compacts and smooths the coffee bed. According to the manufacturer, this gives the same tamping pressure every time.
Automatic reset
After the tamp, the mechanism resets by itself. You simply let go, without pulling the tamper back or resetting it.
Adapts to the fill height
The tamper accommodates different fill heights of up to about 13 mm without you having to adjust anything. When you press it down, the internal mechanism releases the spring and you hear the signal.
Open skeleton design
The housing is open, so the mechanism stays visible. With it, MHW-3BOMBER combines traditional craftsmanship with a modern, mechanical style.
Durable materials
The base is made of SUS304 stainless steel, which according to the manufacturer resists oxidation and corrosion and is easy to clean. The head is covered in silicone that sits comfortably in the palm. Aluminium alloy completes the build.
Flat or Ripple: two bases to choose from
We offer the Yu Impact Tamper with two bases. Flat is a flat, smooth base. Ripple is a ribbed base with concentric grooves. Diameter and mechanism are the same on both. Which base suits you better is mostly a matter of taste.
Impact Tamper or Flash Tamper?
Both tampers take the guesswork out of tamping, but they feel different. With the Flash Tamper 2.0 by MHW-3BOMBER, three springs provide a constant 30 lbs, a click confirms the pressure, and the handle is made of walnut. The Yu Impact Tamper relies on four springs, an automatic reset and the simple black design of the Yu Series. Which one sits better in your hand is a matter of feel. Our opinion is one of many.
Care
The manufacturer gives four notes: stop pressing as soon as you hear the signal. Do not take the tamper apart yourself. Do not wash it with water. And do not knock it against anything, because it is a precision tool. We wipe the base with a dry cloth after every tamp.
At a glance
| Brand |
MHW-3BOMBER |
| Series |
Yu Series |
| Type |
Impact tamper with spring mechanism |
| Diameter |
58.35 mm, for 58 mm portafilters |
| Mechanism |
four springs, audible signal, automatic reset |
| Fill height |
up to approx. 13 mm without adjustment |
| Base |
Flat (flat) or Ripple (ribbed) |
| Material |
SUS304 stainless steel, aluminium alloy, silicone |
| Weight |
about 450 g |
| Origin |
China |
Who it’s for
For anyone with a 58 mm portafilter espresso machine who wants an even tamp without thinking about it. For example, when you pull several shots in a row in the morning and each one should be compressed the same way. Or when different people use the same machine. And for everyone who likes the pared-back design of the Yu Series and enjoys matching their tools. If you are still looking for the right machine or grinder, our advice tool for coffee machines will help.
What goes with it
You will find more models under tampers: if you want a tamper that is affordable and precise, look at the Spring-Loaded Tamper from Normcore; if you want a heavy piece of engineering in your hand, look at Weber Workshops. Before tamping, loosen the grounds with a tool from our WDT tools, compact from Normcore or the Moonraker from Weber Workshops. For an even extraction, puck screens from Normcore and Weber Workshops are available, and for setting things down you will find stations and mats under tamping stations. The right grinder is under coffee grinders, everything from the brand under MHW-3BOMBER. And if you are unsure what suits your setup, our advice tool will help.
Frequently asked questions
How does the Yu Impact Tamper work?
Four springs inside keep the tamper level while you press. When the pressure is reached, you hear a signal, and after you let go, the mechanism resets automatically.
What is the difference between Flat and Ripple?
Flat is a flat, smooth base, Ripple a ribbed base with concentric grooves. Diameter and mechanism are the same on both versions.
Does the tamper fit my portafilter?
The base measures 58.35 mm and is made for 58 mm portafilters. For machines with 51 or 54 mm portafilters it is too large.
How do I look after the Impact Tamper?
Wipe the base with a dry cloth after tamping. We recommend not holding the tamper under water and not taking the mechanism apart yourself.
How quickly will the tamper be delivered?
Delivery takes 2–5 working days, throughout Switzerland and to Liechtenstein. Click and Collect is available in Bern and Zurich.
Can I see the tamper before buying?
Of course. Visit us in our showrooms in Bern (Gerberngasse 44) and Zurich Oerlikon (Hagenholzstrasse 50b). It is best to ask briefly beforehand whether the version you want is currently on site.
Tip from the roastery: Set the tamper down straight, press calmly until the signal and then let go instead of pressing further. In our experience, this makes the routine most consistent. For the portafilter we recommend Cozy Chocolate and Nutty Delight: dense, round and chocolatey. For a bold espresso with lots of body and hardly any acidity, Very Nutty is a good fit. And if you want to discover something fruity, you will find it in Wild Peach. You will find all our coffees under coffee beans. That is our recommendation, one of many.
