Fiorenzato F5 - very tight adjustment collar

[wongfamily Junior Member Find all posts View Profile Close wongfamily]

Hi CS community,
I have just come across a big problem with my F5 Fiorenzato grinder. The adjustment collar is extremely tight after screwing down 5 pitches/threads. How should I proceed to reinstate what I believe is damaged threads? Visually I can't see anything obvious. I have hard brushed the threads to remove all grinds And vacuumed all debris.

[Gavisconi007 Senior Member Find all posts View Profile Close Gavisconi007]

Hi CS community,
I have just come across a big problem with my F5 Fiorenzato grinder. The adjustment collar is extremely tight after screwing down 5 pitches/threads. How should I proceed to reinstate what I believe is damaged threads? Visually I can't see anything obvious. I have hard brushed the threads to remove all grinds And vacuumed all debris.

Try some Hydroseal thread lubricant on the threads. That should fix it.

[Bazooka Senior Member Find all posts View Profile Close Bazooka]

Get a a soft metal bristle brush (copper?/brass?) from a local hardware store and give grinder thread a good scrub to remove coffee ground and then apply food safe grease .. That should fix it

[Dimal Mal Find all posts View Profile Close Dimal]

Even better than grease of any kind (just attracts more coffee grinds), is a dry lubricant such as one of the heavy duty PTFE based ones or even powdered graphite which can be sourced from most hardware stores...

Mal.

[Gavisconi007 Senior Member Find all posts View Profile Close Gavisconi007]

Even better than grease of any kind (just attracts more coffee grinds), is a dry lubricant such as one of the heavy duty PTFE based ones or even powdered graphite which can be sourced from most hardware stores...

Mal.

Good idea, although I've had grease on my threads for 9 months and it is still turning freely. Graphite would be better though, agreed.

[Dimal Mal Find all posts View Profile Close Dimal]

Probably depends on whether or not you use your grinder for a wide range of brewing methods I guess.
I suppose if you mainly stick to espresso brewing, then the thread higher up from the bottom of the burr-carrier won't be exposed to fresh coffee grinds.

Mal.