TUS172 wrote:
We are talking about a custom job done by craftsmen that obviously have a passion for doing things right, I personally
am one who is willing to have faith in their decisions as to what is best.
...
I have sent a portafilter to Lino that fit both a '86 and a '67 Cremina perfectly... I don't think that Olympia (small shop) has been in the habit of changing dimensions or design of something that works well.
...
From a tolerance point of view I also don't think that the Portafilter to grouphead fit or ear to rim distances, are measured down to ten thousandths of an inch

Not questioning the skill of these two professionals, or that they wouldn't do things right, but they should be provided with enough data for them to know what is right. One portafilter to measure and some assumptions about Oly practices over the decades are not a very broad data set.

I believe if the naked portafilter is manufactured to the tolerances of the older portafilters we will be okay, if my 1976 portafilter is representative.

With the tongue of my calipers, it is difficult for me to get a precise measurement of the rim support wall relief, because there is a radius where the wall meets the ledge.

Regards
Timo

Vis variations in the portfilter size:

Please nobody bite my head off but, I got really lucky a while back and landed myself a few OE portafilters in varying conditions and what appears to be varying ages - I can confirm that there are minor differences in these eg length and thickness of the lugs. Now my 70's Cremina grouphead was possibly dremelled to allow a non standard portafilter to fit so I also tested all these out on the 80's Maximatic and the 60's (we think) Club and I can say that that they all work with slightly varying degrees of rotation for the lock in. This group includes a modern version and what I assume is a 60's head from the club.

I dont have callipers to measure these but I'll try and post a picture for a visual cue tomorrow.

Hope that helps,
sneaky

Bite , your head off- it is the furthest thing from my mind...

I want to invite you over to dinner ,have some great wine, followed by Port, Scotch and cigars( and bring those PF with you!) . When you are sleeping, the elves will wisk them away and you have no remembrance of the night before--

Invite is in the mail

mogogear wrote:Bite , your head off- it is the furthest thing from my mind...

I want to invite you over to dinner ,have some great wine, followed by Port, Scotch and cigars( and bring those PF with you!) . When you are sleeping, the elves will wisk them away and you have no remembrance of the night before--

Invite is in the mail

Amen Brother...Amen
richard
PS, are they to be for sale to the highest bidder / brudder?

Lino has gotten the measurements off my portafilter and wanted to know how many would be interested in the stainless version as compared to the brass. I am partial to stainless... but am willing to go with the majority rule vote.

My entry is 2 in stainless. Others?

I'll go with either.

Sorry to have picked upon this thread late but I'm in for a brass.

Marvin

I could go for either, as well.

Regards.

I'm in for one of whatever majority rules on.
paul

Since my PF is close to being roughed out, I shall opt out.
Lino, I use a truckers', stainless steel, bumper buffing compound for most materials, it also works well for brass, it just cuts faster. 'Wrights Copper Polish" or a red or white rouge buff from there. If I may help in any way, let me know.
sincerely
richard