Hi finn - thanks - yes I think there are lots of people out there doing many hours on forklifts.
Thanks for your other responses
Johnr - yep - guess I would need to go to individual specs - I didn't think it was ethical to start mentioning manufacturers - agree that force application is a risk factor but as stated the new machines have addressed this - I believe rotation reps however are a big risk factor. This does not appear to have been addressed ie lock to lock rotations.
Normandy you mention training - does this talk about posture/ duration of time spent on forklift each session? I would very much appreciate if you could point me towards this training.
I am a Physio and ergonomist and my job is to alter injury cause -no litigation here - just trying to help people - despite you not being aware of shoulder symptoms related to forlift operation I can assure you that they happen.
TC17 you mention the spinner **** - this puts the hand in a palm down position which puts the forearm muscles on stretch and adds another risk factor - a better design would be a bar or pistol grip. The overall risk however would still be dependent on how long the person operates / job demand and so on.
Going back to my original question - lock to lock ratio -
thanks again for your responses.