Tamper size recommendations

Clinker

I've been feeling that my Iberital tamper which is nominally 58mm is a bit small for the 58mm baskets I use (which is annoying because I got it to replace a nominal 57mm tamper, and I don't really think there's much difference!). I've finally taken my trusty Vernier gauge to my tamper and baskets and the results are that the tamper measures 57.2mm, while the basket in my naked PF measures 58.7mm internally (before it starts to taper inwards) while the double basket which came with my Gaggia Classic measures 58.8mm.

I'm not convinced the Vernier is super accurate so I looked up the official sizes of euro coins on Wikipedia and measured a few from my pocket. Conclusion: it seems to over-read by about 0.2mm. That bring the tamper down to 57.0mm and the basket to 58.5mm.

I'm thinking of getting a Reg Barber tamper (sizes in 0.1mm increments): how much play should I allow? Presumably a 58.5mm tamper would be too tight for comfort, but on the other hand, I don't want another loose one!

the beer revolu

rymus wrote: »

Okey dokey, it's been a while but this is possibly back on. I've been talking to a guy that says he'll machine bases out of stainless, brass, copper or aluminium. Precision wise, he's good to within .02 mm.

Now the financial part. He'll supply materials and create to specs for €25, or less if there are a number of people interested.

Currently discussing fancy turned wooden handles with someone else, details to follow.

Pricing wise, it's going to work out cheaper the more business I can throw at these two guys I imagine. If you are interested, let me know and I'll give you a shout when the details are sorted. I'm most likely going to get a sample done up in the next couple of weeks if anyone wants a gander.

I'd be very interested!