Oddly enough I was commissioned a few years back to produce another tamper for a customer. This one had 2 stipulations, it had to match an orange espresso machine and needed to be angular in design.
I bounced a couple design files back and forth with the customer (thanks again should you be reading this) and we settled on this 7 sided arch shape with a 3D printed base. This tamper was 3D machined from Padauk in two 1 inch blanks.
After the blank was rough cut to size I mounted it inside the CNC machine and carefully aligned the 2 part CAD model over the work. I love working with exotics and want to make the most of the material so careful measurements and toolpaths are a must.
The parts held in place during machining with sprue's that are placed in locations where they are either not visible in the final assembly, or on flat surfaces to make finishing easier. After the machining the halves were glued together then sanded down to 220 to blend everything perfectly and remove all tooling marks.
This is that beautiful exotic hardwood with a light coat of boiled linseed oil. The base of this was tapped for a stainless bolt stud which mates with the 3D printed part shown next. The threading on the bottom was also sized to match a variety of "aftermarket" tamp bases incase the customer ever wanted to upgrade to a steel base...although having a 100% custom part gives a nice feeling of uniqueness.
You can just make out the detail in the printed base where the angled sides blend into the round base. This was a very fun project and I'm happy I was able to share some of these details. I've recently spoke with the owner of this lovely project (built in 2013) and they said its holding up great and is still part of their espresso ritual.