Sale price€128,00

Tax included. Shipping calculated at checkout

SKU: 01A-A40-STD-C01-P1A-40A
Only 2 units left

This is a preorder.
Shipping estimated September to December 2022.
By purchasing you agree to the group buy terms.


Full steel, custom mechanical keyboard enclosure made from bent sheet metal. Combining steel and the manufacturing method of bending results in a heavy, rigid and durable construction. The bolts piercing through the frame reveal the top mount design. The overlapping and open flanges are a deliberate choice to reveal the method of folding. The typing angle can be adjusted by a screwable mono-foot, which keeps the case resting solid at every angle. When extended, the black mono-foot disappears in the shadow and makes the case appear like its rear is floating.
It is a minimalist design without any branding. Made in Germany.


The HMKB-40 is the smallest in the lineup. It was designed specifically for the Eon40 PCB. Compared to the other, bigger sizes in the HMKB line, the bezels are reduced in order to keep a good balance between key-area and bezel-size.


  • top mount construction
  • plate fully isolated (TPU grommets)
  • high profile case, caps sink in deep
  • adjustable typing angle (6, 8, 10 and 12°)
  • low first/lowest key row
  • powder coated steel or...
  • bead blasted 304 stainless steel
  • weight kit ~1.0kg
  • weight build ~1.2kg


For the 40% only the standard steel plate option is available. A galvanizing process results in a deep black finish which protects it from corrosion.


  • keyboard enclosure (top, bottom, mono-foot)
  • switch plate (steel, brass or 304 stainless steel)
  • silencing foam (3.5mm EPDM)
  • PCB (Eon40), more details here
  • accessories (grommets, bolts, standoffs, nuts)
  • user manual with build instructions

Additional Information

The powder coated steel cases are available in four colors. This coating is very durable and has a slightly grainy texture. A fifth version is made of stainless steel, it is bare metal with bead blasted finish.

- RAL 1013 oyster white, fine texture
- RAL 7039 quartz gray, fine texture
- RAL 9005 jet black, fine texture
- RAL 1023 traffic yellow, fine texture
- 304 stainless steel, bead blasted

RAL 1013 pairs well with old and classic cherry keycaps. RAL 7039 is a warm gray which is a perfect fit for dolch keycaps sets. RAL 9005 black goes well with almost everything. RAL 1023 is a vibrant yellow.

To represent the RAL colors in the renderings, the corresponding RGB values from this page were used. The colors on your specific monitor may appear different compared to the real life RAL colors.

Depending on the combination of your plate and PCB, many different layouts can be build. To see exactly which layouts you can build with your desired HMKB size and version, please go to the layouts page to learn more.

The images are 3D renderings and are for illustration purposes only.

For powder coating the parts are put on racks. This will leave a little mark. It is usually at one of the holes. Since the holes will be covered by the bolt heads, these marks will not be visible when the case is assembled. Although highly unlikely, it is possible that dust particles may be caught in the powder coating.

The bending process leaves slight marks. They are not a concern for the powder coated steel parts and not visible at all. The stainless steel parts are not powder coated but bead blasted instead. On all of the prototypes the bead blasting removed those marks completely and they were not present anymore. However, there is a small chance that some stainless steel parts may show slight traces of these marks, even after the bead blasting.

The angles of the flanges may not always be perfectly 90˚. Though unlikely, a deviation of up to 1˚ can occur. This would still be hardly noticeable.

The switch plates can have scratches. Do to the manufacturing process of sheetmetal, the switch plates may be slightly bent.

None of these effects are considered a defect and are no reason for a refund or a replacement.

PCBs need to be checked first before soldering. After soldering, damaged PCBs are not eligible for replacement.

Shipping world wide, with just a few exceptions. See the current shipping prices over at this page.

Updates regarding shipping will be posted on the HMKB discord server. Some of the updates will also be posted on the group buy page on geekhack, though the discord server should be regarded as the main source for updates. The Newsletter will also provide some updates.